Page 1 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 83309302 1/2018-05...
Page 2: Table Of Contents
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact User instructions ...................... 6 1.1 Target group ........................ 6 1.2 Symbols .......................... 6 1.3 Guarantee and Liability .................... 6 Safety ............................. 8 2.1 Designated application .................... 8 2.2 ...
Page 3 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5.2 Hydraulic connection .................... 38 5.3 Gas supply ........................ 40 5.4 Install condensing unit .................... 41 5.5 Condensate connection ................... 44 5.6 Air supply / flue gas duct .................. 45 5.7 ...
Page 4 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6.6.7 Service WTC ...................... 86 6.6.7.1 Servicing ...................... 86 6.6.7.2 Input measurement .................. 87 6.6.7.3 Output measurement .................. 88 6.6.7.4 Control measurement ................. 90 6.6.7.5 ...
Page 5 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact Accessories ........................ 144 11.1 Externally powered anode .................. 144 Technical documentation .................. 146 12.1 Hydraulic versions .................... 146 12.1.1 WTC version KI .................... 146 12.1.2 WTC version KP .................... 148 12.2 ...
Page 6: User Instructions
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 1 User instructions 1 User instructions This manual forms part of the equipment and must be kept on site. Translation of original Carefully read the manual prior to working on the unit.
Page 7 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 1 User instructions the installation of additional components, which have not been tested with the unit, changes to the combustion chamber, unsuitable fuels, defects in the inlet lines.
Page 8: Safety
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 2 Safety 2 Safety 2.1 Designated application The unit is suitable for: Warm water heating circuits in closed systems to EN 12828, a flow rate of maximum:...
Page 9: Normal Operation
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 2 Safety 2.4.1 Normal operation All labels on the unit must be kept in a legible condition. Stipulated settings, service and inspection work should be carried out at regular intervals.
Page 10: Product Description
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3 Product description The gas condensing unit WTC Compact consists of a condensing boiler and a drinking water storage tank. 3.1 Type key Condensing boiler Example: WTC-GB 15-B vers.
Page 11: Serial Number
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.2 Serial number The serial number on the name plate identifies the product. This is required by Weishaupt's customer service department. Condensing boiler...
Page 12: Condensing Unit Function
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.3 Condensing unit function 3.3.1 Water, air and flue gas carrying components Image: WTC-GB 15-B vers. K 1 Quick action vent valve 2 Flue gas connection 3 Expansion vessel 18 litres / 0.75 bar...
Page 13: Electrical Components
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.3.2 Electrical components Image: WTC-GB 15-B vers. K 1 Flow sensor eSTB 2 Display and operating unit (system device) 3 Device electronics WEM-FA-G with electrical connection and unit fuse...
Page 14: Safety And Monitoring Functions
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.3.3 Safety and monitoring functions 3.3.3.1 Flow sensor eSTB / flue gas sensor Flow sensor eSTB The fuel supply is shut off and the pump run-on is activated if the temperature ex- ceeds 95 °C (W 12).
Page 15: Multifunction Sensor Vpt
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.3.3.2 Multifunction sensor VPT The multifunction sensor determines and monitors: volumetric flow, system pressure, flow temperature, return temperature. Volumetric flow If the volumetric flow drops below 60 l/h, the appliance switches off (W 10), (not in heating mode, when the condensing unit supplies the heating circuit dir- ectly).
Page 16: Combustion Control (System Scot®)
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.3.4 Combustion control (System SCOT®) The appliance is equipped with an electronic combustion control. The combustion control is carried out via ionisation electrode. Depending on the measured ionisation current, the gas volume is regulated to the amount of air avail- able.
Page 17 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description correction Following calibration via the output measurement or using the commissioning wiz- ard, a new O curve is generated. The entire curve can then be moved in parallel via the O2 total correction at max load, thus optimising the O content;...
Page 18: Program Sequence
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.3.5 Program sequence Ignition speed The fan stars at heat demand 1 and drives to ignition speed 2. Ignition Ignition 3 starts once the ignition speed has been stabilised. The gas valves 4 open.
Page 19 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description Post-purge Following every normal shut down, after faults and after the return of the power supply, the fan is operated at the post-purge speed 0.
Page 20: Fresh Water Storage Tank Function
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.4 Fresh water storage tank function The condensing boiler can be combined with the following fresh water storage tanks: Pipe coil tank WAS 100 Bloc-P/A...
Page 21 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description WAS 80 Power/Bloc-P/A WAS 115 Power/Bloc-P/B The fresh water is heated via a plate heat exchanger. DHW loading is initiated, when the temperature at the DHW sensor switch-on (B3) drops below the DHW setpoint temperature minus the switch differential.
Page 22: Technical Data
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.5 Technical data 3.5.1 Approval data Gas Appliance Category DE: II ; AT: II ; CH: II 2N3B/P 2H3B/P 2H3P Type of installation...
Page 23: Emissions
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.5.5 Emissions Flue gas The appliance complies with EN 15502-1 of Emission Class 6. Sound levels Dual number noise emission values WTC 15...
Page 24: Rating
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.5.6 Rating Condensing boiler WTC 15 WTC 25 Combustion heat rating Q 2.0 … 14.0 kW 3.0 … 24.0 kW Boiler capacity at 80/60 °C 1.9 …...
Page 25: Hydraulic Data
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.5.7 Hydraulic data Condensing boiler WTC 15 WTC 25 Water content 2.2 litres 3.1 litres Boiler temperature max 85 °C max 85 °C...
Page 26 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description Resulting supply pressure pulse width modulation 100 % 80 % 60 % 40 % 20 % 1000 1100 1200 1300 1400 1500 1600...
Page 27 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description Resulting supply pressure constant pressure 1000 1100 1200 1300 1400 1500 1600 1 Throughput [l/h] 2 Resulting supply pressure [mbar] 3 Constant pressure stage 1...
Page 28: Flue Gas System Data
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.5.8 Flue gas system data WTC 15 WTC 25 Residual supply pressure at flue gas 76 Pa 116 Pa outlet Flue gas mass flow rate 0.9 …...
Page 29: Dimensions
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.5.10 Dimensions 3° 275 mm 600 mm 1 161 mm for DN 100/60 171 mm for DN 125/80 2 Intake air/flue gas Ø 125 mm/DN 80 3 WAS 100: 1702 mm...
Page 30 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description WAS 100 600 mm 70 mm 160 mm 230 mm 340 mm 361 mm 430 mm WAS ... Power 600 mm 8 9 0...
Page 31: Weight
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 3 Product description 3.5.11 Weight WTC 15 WTC 25 WAS 100 WAS 80 Power WAS 115 Power Weight empty approx. 49 kg approx. 55 kg approx. 90 kg approx.
Page 32: Installation
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 4 Installation 4 Installation 4.1 Installation conditions Only valid in Switzerland When installing and operating the regulations of SVGW, VKF, local and Cantonal regulations and the EKAS guideline (LPG Guideline Part 2) must be observed.
Page 33: Installing Fresh Water Storage Tank
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 4 Installation 4.2 Installing fresh water storage tank Transport protection Remove the transport protection. Remove front panel Pull the front panel forward and lift out of the guide holes.
Page 34: Installation
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5 Installation 5.1 Requirements for the heating water In support of VDI guideline 2035 the following requirements are applicable for heating water. Untreated fill and top-up water must be of domestic water quality (colourless, clear and without any sedimentation).
Page 35 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation WTC 25 1000 1200 1400 1600 1800 1 Fill and top up water quantity [litres] 2 Total hardness [°dH] 35-196 83309302 1/2018-05 La...
Page 36: Fill Water Quantity
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.1.2 Fill water quantity If information about the fill water quantity is not available, the following table can be used to estimate the quantity.
Page 37: Treat The Fill And Top-Up Water
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.1.3 Treat the fill and top-up water De-ionisation (recommended by Weishaupt) De-ionise the fill and top-up water completely. (Recommendation: mixed bed procedure) When the heating water has been entirely de-ionised, additional top-up water up to 10 % of the system contents may be untreated.
Page 38: Hydraulic Connection
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.2 Hydraulic connection Safety valve A safety valve must be installed in the fresh water inlet. The safety valve: must not be shut off from fresh water storage tank, must respond at the latest when the maximum permitted operating pressure of the fresh water storage tank has been reached.
Page 39 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation Check fresh water storage tank Check inspection opening and connections are water tight. Check operational readiness of safety valve by applying air. Pressure test system until safety valve reacts.
Page 40: Gas Supply
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.3 Gas supply Only an approved gas installer may carry out the gas side connection. Observe local regulations. The gas characteristics must match the data given on the name plate of the appli- ance.
Page 41: Install Condensing Unit
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation If a gas safety valve is required: Connect valve to output MFA1 or VA1/2, see [ch. 5.7.1]. Set output to Gas safety valve ,see [ch. 6.6.9.5].
Page 42 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation Connecting the condensing unit to the fresh water storage tank hydraulically Fit inlet and outlet tap 2. Insert seals into ball valves and connect heating circuit to WTC, if necessary loosen nuts 3 to compensate for tension with the help of the slotted holes.
Page 43 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation Establish earth connection to condensing unit Insert earth cable 1 from condensing unit to earth connection of the fresh water storage tank. Fill condensing unit Contamination of drinking water Topping up without system separator can contaminate the drinking water.
Page 44: Condensate Connection
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.5 Condensate connection Danger of poisoning by escaping flue gas Flue gas can escape if the siphon is not filled. Inhalation leads to dizziness, nausea and eventually death.
Page 45: Air Supply / Flue Gas Duct
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.6 Air supply / flue gas duct Air supply duct The combustion air can be supplied: from the installation room (room air dependent operation), through concentric piping systems (room air independent operation), through separate air duct in the room (ducted air intake).
Page 46: Electrical Connection
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.7 Electrical connection Risk of electric shock Working on the device when voltage is applied can lead to electric shock. Isolate the device from the power supply prior to starting any work.
Page 47: Wiring Diagram
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.7.1 Wiring diagram Observe the instructions for the electrical installation [ch. 5.7]. Depending on the hydraulic variant selected, the inputs and outputs are pre-as- signed, the function can then not be changed [ch. 12.1].
Page 48 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation Additional input/output module (optional) With the additional module, the inputs and outputs of the condensing unit are ex- tended. This allows certain hydraulic variants or special functions to be implemen- ted.
Page 49 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation Adapter set WEM-CAN 2 wire (optional) With the adapter set, the room sensor WEM-RF or the room device WEM-RG can be connected to the 4 wire CAN Bus in an existing installation with 2 wires.
Page 50: Bus Installation
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.7.2 Bus installation Observe the instructions for the electrical installation [ch. 5.7]. Install the Bus as per wiring diagram whilst paying attention to the maximum number of room devices and room sensors.
Page 51: Connect External Pump
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.7.3 Connect external pump Observe the instructions for the electrical installation [ch. 5.7]. Depending on the hydraulic variant selected, the outputs are pre-assigned, the function can then not be changed [ch. 12.1].
Page 52: Connect Fresh Water Storage Tank Was
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.7.4 Connect fresh water storage tank WAS 100 Observe the instructions for the electrical installation [ch. 5.7]. Guide the sensor cable through the recess to the electrical installation shaft.
Page 53: Connect Fresh Water Storage Tank Was ... Power
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 5 Installation 5.7.5 Connect fresh water storage tank WAS … Power Observe the instructions for the electrical installation [ch. 5.7]. Fit enclosed add-on module inputs / outputs. Remove plug ...
Page 54: Operation
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6 Operation 6.1 Operational display The light bar 1 shows the operating status of the condensing unit. Light bar Description No voltage supply or light bar deactivated...
Page 55: Display And Operating Unit
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.2 Display and operating unit turn navigation through parameter structure; changing values press briefly: confirm or save values approx. 3 seconds: exit value without saving approx.
Page 56: Display
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.3 Display Start screen Thursday 2016-06-23 16:55 Boiler temperature 7 °C °C 54.0 50 °C Automatic 1.8 bar heating mode 1 Information: Information from menu Info in the user level.
Page 57: Favourites Level
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.4 Favourites level Frequently used user level parameters can be assigned as favourites. It is possible to assign a maximum of 6 favourites. Factory pre-assigned favourites can be replaced by parameters from the user level.
Page 58: Info
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.5.1 Info Info In menu Info, the information is read only. Information Description Current temperature at the external sensor (B1). External temperature Current temperature at the DHW sensor (B3).
Page 59: System Operating Mode
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.5.2 System operating mode System operating mode Menu System operating mode determines the operating mode of the entire system. Setting Description Frost protection on...
Page 60: Heating Circuits
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.5.3 Heating circuits Heating circuits A separate submenu appears for each heating circuit. Parameters Setting determines the type of operation of the heating circuit.
Page 61 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation Parameters Setting Room setpoint temperature for the temperature level selected. Comfort (factory setting: 22.0 °C) Room setpoint Normal (factory setting: 21.0 °C) temperature Setback (factory setting: 16.0 °C) The levels can be assigned to specific times of the day using parameter Heating program .
Page 62: Domestic Hot Water
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.5.4 Domestic hot water Domestic hot water Parameters Setting DHW temperature for normal and setback operation. Normal (factory setting: 50 °C) DHW setpoint Setback (factory setting: 40 °C) temperature Normal and setback operation can be assigned to specific times of the day using the DHW program.
Page 63: Settings
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.5.6 Settings Settings Parameters Setting Set current time of day. Time of day Set current date. Date Configure automatic change-over of summertime. On (factory setting) Summertime activate acces to WEM Portal [ch. 12.11].
Page 64: Expert Level
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6 Expert level Factory setting and setting range see [ch. 12.6] Depending on the execution, hydraulics and control variations, certain information and parameters are hidden.
Page 65: Info
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.1 Info In menu Info, the information is read only. 6.6.1.1 System Info System Information Description Current operating mode of system. 1.1.1...
Page 66: Wtc
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.1.2 WTC Boiler controller Boiler Info WTC-G ... controller Information Description Current operating phase of condensing unit. 1.2.1.1 Operating phase WTC...
Page 67 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation Boiler circuit Info WTC-G ... Boiler circuit Information Description Current setting of three-way valve in the condensing boiler. 1.2.2.1 Internal three-way...
Page 68 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation Combustion Info WTC-G ... Combustion Information Description Maximum ionisation signal determined during the calculation procedure [ch. 3.3.4]. 1.2.3.1 Ionisation signal Replace ionisation electrode if: SCOT base value WTC 15: <...
Page 69: Remote Control
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.1.3 Remote control Remote Info control Information Description Current voltage signal at input N1. 1.4.1 Voltage remote control input (N1) Flow setpoint temperature of the remote control.
Page 70: Heating Circuits
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.1.5 Heating circuits Heating Info circuits A separate submenu appears for each heating circuit. Information Description Current operating mode of heating circuit.
Page 71 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation Information Description Current operating mode of heating circuit pump. 1.6.9 Heating circuit pump Current calculated advance time of heat-up optimisation with control variation 1.6.10 Correction weather compensated control.
Page 72: Domestic Hot Water
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.1.6 Domestic hot water Domestic hot Info water Information Description Current operating mode of DHW circuit. 1.7.1 Status Standby via system program switch...
Page 73: Fault Memory
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.1.7 Fault memory Fault Info memory Information Description The System menu contains the last 10 errors of all devices. System The last 16 faults of the condensing boiler and the system status when the fault occurred are stored in the WTC menu.
Page 74: Wtc
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.2 WTC 6.6.2.1 Boiler controller Boiler WTC-G ... controller Parameters Setting After switching off the burner, the condensing unit remains locked in heating mode 2.1.1...
Page 75: Boiler Circuit
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.2.2 Boiler circuit WTC-G ... Boiler circuit Parameters Setting Operating mode of internal condensing unit pump for heating mode [ch. 12.4]. 2.2.1 Internal pump...
Page 76: Combustion
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.2.3 Combustion WTC-G ... Combustion Parameters Setting Changes the gas quantity at ignition. 2.3.1 Gas quantity correction at start Changes the load (fan speed) at ignition.
Page 77: Remote Control
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.3 Remote control Remote control Parameters Setting [ch. 12.3] Voltage limit for error message. Voltage error If the voltage at input N1 drops below the value set, an error message (F 80) will input N1 be issued after approx. 15 minutes.
Page 78: Hydraulic
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.4 Hydraulic 6.6.4.1 De-couple Hydraulic De-couple Parameters Setting [ch. 12.2.5] The pump modulates depending on the temperature difference between flow 5.2.1 sensor and de-couple sensor (B2).
Page 79: Heating Circuits
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.5 Heating circuits A separate submenu appears for each heating circuit. 6.6.5.1 Heating circuit settings Heating Heating circuit circuits settings Parameters Setting Lower limit for the minimum flow temperature.
Page 80: Control Behaviour
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.5.2 Control behaviour Heating Control circuits behaviour Parameters Setting To ensure that the room setpoint temperature reaches the level set at the begin- 6.2.1...
Page 81: Mixer Control
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation Parameters Setting If the outdoor temperature drops below the value set, heating continues in setback 6.2.8 mode at normal level, to prevent the building from cooling down.
Page 82: Screed Program
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.5.4 Screed program Heating Screed circuits program Damage to the building structure It is possible that the screed program on the pump heating circuit could be masked by other heating circuits or by DHW circuits.
Page 83 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation Parameters Setting 6.4.1 Off: Screed program deactivated. Screed Function specific heating: Function specific heating curve activated. Screed drying: Screed drying curve activated. Function specific heating and screed drying: Function specific heating and screed drying activated one after the other.
Page 84: Domestic Hot Water
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.6 Domestic hot water 6.6.6.1 DHW control Domestic hot water control Parameters Setting Defines the temperature increase for the DHW loading. 7.1.1...
Page 85: Legionella Protection
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.6.2 Legionella protection Domestic hot Legionella water protection Parameters Setting Protection function against legionella. 7.2.1 Protection function Off: Legionella protection deactivated. By weekday: legionella protection is carried out on the weekday set, see parameter weekday.
Page 86: Circulation
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.6.3 Circulation Domestic hot water Circulation Parameters Setting Switch differential for the circulation pump control. 7.3.1 Switch differential Only if circulation pump is set to time controlled + temperat- Return flow temp ure .
Page 87: Input Measurement
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.7.2 Input measurement Input Service WTC measurement Wizard for input measurement. An input measurement is required prior to every service. Select expert level [ch. 6.6].
Page 88: Output Measurement
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.7.3 Output measurement Output Service WTC measurement Wizard for output measurement. An output measurement is required after every service. Select expert level [ch. 6.6].
Page 89 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 2. Optimise O content at max. load A correction is not necessary, if the O content is within the permissible range. Max load content Natural Gas 4.5 …...
Page 90: Control Measurement
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.7.4 Control measurement Control Service WTC measurement Wizard for control measurement. During the control measurement, any load between max load and min load can be started (e. g.
Page 91: Combustion Chamber Pressure
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.7.5 Combustion chamber pressure Combustion chamber Service WTC pressure The parameter Combustion chamber pressure can be used to determine the differ- ential pressure of the heat exchanger.
Page 92 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation Activate measurement Switch on system at switch S1 [ch. 5.7]. Select combustion chamber pressure and confirm. Set combustion chamber pressure to On and confirm. The fan drives to maximum fan speed.
Page 93: Output Test
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.8 Output test During the output test, the actuators connected (pump, mixer, etc.) can be switched manually for test purposes. When exiting the parameter, the output test is automatically reset to Off .
Page 94: Commissioning Menu
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.9 Commissioning menu In the commissioning menu, the engineer can: interrogate or change commissioning settings, call up device information, configure inputs and outputs, start program for purging and water filling, carry out BCC updates, reset system to factory settings.
Page 95: Device List
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.9.2 Device list Device list Commission- Parameters Settings / description Addressing and assigning devices. Device list See commissioning steps adjust condensing unit [ch. 7.2].
Page 96: Hydraulic
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.9.3 Hydraulic Hydraulic Commission- Parameters Settings / description The commissioning wizard Hydraulic guides you step by step through the selection of system hydraulics.
Page 97: Heating Circuits
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.9.4 Heating circuits Heating circuits Commission- A separate submenu appears for each heating circuit. Parameters Setting The commissioning wizard Heating circuit guides you through the commissioning of the heating circuit.
Page 98: Inputs/Outputs
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.9.5 Inputs/outputs Inputs/outputs Commission- The inputs and outputs can be configured for various functions. Depending on the hydraulic variant selected, the inputs and outputs are pre-as- signed, the function can then not be changed [ch. 12.1].
Page 99: Wtc
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation Heating circuit (extension module WEM-EM-HK) A separate submenu appears for each heating circuit. Parameters Setting Function of input H1 [ch. 12.5]. 10.5.2.1 Input H1 Function of sensor T1.
Page 100: Factory Setting
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.6.9.7 Factory setting Factory setting Commission- Parameters Setting Reset system to factory setting. Factory setting All parameters are reset to factory setting, with the exception of: test bench configuration (device version), parameters of device electronics WEM-FA-G (except for parameters which are...
Page 101: Chimney Sweep Function
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 6 Operation 6.7 Chimney sweep function The function is used for flue gas measurement. During the chimney sweep function, the unit runs at maximum capacity. Activate chimney sweep function Select the Chimney sweep symbol and confirm.
Page 102: Commissioning
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 7 Commissioning 7.1 Prerequisite Commissioning must only be carried out by qualified personnel. Only correctly carried out commissioning ensures the operational safety. Prior to commissioning ensure that:...
Page 103: Check Soundness Of Gas Valve Train
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 7.1.1 Check soundness of gas valve train Carry out soundness test: prior to commissioning, after all service and maintenance work. Switch off system using switch S1 [ch. 5.7].
Page 104: Check Gas Connection Pressure
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 7.1.2 Check gas connection pressure Risk of explosion due to excess gas supply pressure Exceeding the maximum connection pressure can damage the gas valve train and lead to an explosion.
Page 105: Adjusting The Condensing Unit
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 7.2 Adjusting the condensing unit Depending on system variation, specific commissioning steps are shown or hidden. For cascade operation or multiple assignment, note deviating settings for commis- sioning, see installation and operating manual Flue gas-air system.
Page 106 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 3. Check device list Select and confirm. Device list is loading. The address of each Bus participant of the system is displayed in the device list.
Page 107 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 5. Set circulation pump control Set circulation pump control and confirm. Non: no circulation pump installed. Yes: time controlled: pump is controlled via time program [ch. 6.5.4].
Page 108 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 7. Address heating circuit (optional) This step only has to be carried out for multiple expansion module heating circuits. If multiple heating circuits are available: Select the relevant heating circuit.
Page 109 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 9. Address room device 2 (optional) This step only has to be carried out for multiple room devices. If multiple room devices are available: Select relevant room device.
Page 110 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 11. Assign room device 1 (optional) Each room device must be assigned with an operating access and if the control is room temperature controlled, a room sensor must be assigned.
Page 111 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 13. Assign room sensor (optional) For each room sensor, a room sensor assignment must be assigned. Assign de- sired access for heating circuit. Room sensor WEM-RF can only be assigned to one heating circuit. Up to 3 room sensors can be assigned to one heating circuit.
Page 112 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 15. Select hydraulic version Select hydraulic version using dial knob [ch. 12.1]. Press to confirm hydraulic version. Commissioning wizard Commissioning wizard Hydraulic Hydraulic OK = press | Esc = press 3 secs.
Page 113 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning Select and confirm. Control variation is displayed. Set control variation and confirm. Constant flow temperature [ch. 12.2.1] Weather compensated control [ch. 12.2.2] [ch. 12.2.3] Room temperature dependent control [ch. 12.2.4]...
Page 114 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 19. Set type of gas Check type of gas, if required change type of gas. Commissioning wizard WTC Setting type of gas 10.6.7 Natural Gas Check screw on gas combi valve.
Page 115 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 22. Optimise O content at max. load A correction is not necessary, if the O content is within the permissible range. Max load content Natural Gas 4.5 …...
Page 116 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 23. Optimise O content at min. load A correction is not necessary, if the O content is within the permissible range. Min load content Natural Gas 4.0 …...
Page 117: Check Soundness Of Flue Gas System
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 7.3 Check soundness of flue gas system For room air independent operation, the soundness of the flue gas system must be checked by means of an O measurement.
Page 118: Calculate Combustion Heat Rating
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 7 Commissioning 7.5 Calculate combustion heat rating Formula sym- Explanation Operating volume [m Volume measured at gas meter at current pressure and temperature (gas throughput). Standard volume [m Volume gained by gas at 1013 mbar and 0 °C.
Page 119: Shutdown
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 8 Shutdown 8 Shutdown If necessary, unplug the mains adapter of the externally powered anode. Switch off installation and safeguard against accidental re-start. Close fuel shut off devices.
Page 120: Servicing
[ch. 9.1.2]. Weishaupt recommends a service contract is entered into to ensure regular in- spections. The following components must only be replaced and must not be repaired:...
Page 121: Components
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 9 Servicing Prior to every servicing Inform the operator about the extent of service work to be carried out. Carry out input measurement [ch. 6.6.7.2]. Switch off mains switch of installation and safeguard against accidental reactiva- tion.
Page 122: Removing And Refitting Burner Surface
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 9 Servicing 9.1.3 Removing and refitting burner surface Observe notes on servicing [ch. 9.1.1]. Removing Close gas isolating valve. Unplug electrical connections 1 from gas combi valve and fan.
Page 123: Replacing Electrodes
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 9 Servicing 9.1.4 Replacing electrodes Observe notes on servicing [ch. 9.1.1]. Remove cover 5. Unplug ionisation cable 6 from the circuit board. remove screws from ionisation electrode 1. Replace ionisation electrode and gasket 2.
Page 124: Cleaning The Heat Exchanger
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 9 Servicing 9.1.5 Cleaning the heat exchanger Observe notes on servicing [ch. 9.1.1]. Remove burner surface [ch. 9.1.3]. Remove electrodes [ch. 9.1.4]. Heat exchanger cleaning kit (accessory) required. Insert cover plate 1 from cleaning kit.
Page 125 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 9 Servicing Remove siphon cover 1. Clean siphon and fill with water. Refit siphon cover ensuring correct alignment of seal 2, if necessary replace seal. Fill siphon with water via the service cover and check for leaks.
Page 126: Fresh Water Storage Service
9.2.1 Notes on servicing Servicing must only be carried out by qualified personnel. The system should be serviced annually. Weishaupt recommends a service contract is entered into to ensure regular in- spections. Prior to every servicing Inform the operator about the extent of service work to be carried out.
Page 127: Clean Fresh Water Storage Tank
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 9 Servicing 9.2.3 Clean fresh water storage tank Observe notes on servicing [ch. 9.2.1]. Corrosion due to damaged protective layer A protective layer (white coating) is formed in the fresh water storage tank by the magnesium anode.
Page 128: Removing And Refitting Magnesium Anode
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 9 Servicing 9.2.4 Removing and refitting magnesium anode Observe notes on servicing [ch. 9.2.1]. Corrosion protection requires an anode current greater than 1 mA with a minimum water conductivity of 100 µS/cm (25 °C).
Page 129: Non-Return Valve (Was
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 9 Servicing 9.2.5 Non-return valve (WAS … Power) Observe notes on servicing [ch. 9.2.1]. Remove connection pipe. Replace non-return valve. Refit in reverse order, paying attention to the flow direction of the non-return valve 1.
Page 130: Troubleshooting
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting 10 Troubleshooting 10.1 Procedures for fault conditions Check prerequisites for operation: Voltage supply available. Heating switch is set to On. System device or room device set correctly.
Page 131 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting Warnings The system does not lock out during a warning. The signal will extinguish automat- ically as soon as the cause of the warning has been eliminated.
Page 132: Warning Codes
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting 10.2 Warning codes The following warnings must only be rectified by qualified personnel: Warning Cause Rectification Check current humidity at room device. Humidity in room too high Check parameter Humidity at room device, adjust if required.
Page 133 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting The following warnings must only be rectified by qualified personnel: Warning Cause Rectification Check gas connection pressure [ch. 7.1.2] W 20 Flame failure in safety time (flow operated safety device).
Page 134 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting The following warnings must only be rectified by qualified personnel: Warning Cause Rectification If occurring occasionally: W 25 Flame failure during stabilisation (e. g. due to strong wind at the flue gas system): time Requires no action.
Page 135: Fault Codes
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting The following warnings must only be rectified by qualified personnel: Warning Cause Rectification Check the ionisation electrode, replace if W 69 Partial load: stable condition not necessary [ch. 9.1.4].
Page 136 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting The following faults must only be rectified by qualified personnel: Fault Cause Rectification Check gas connection pressure [ch. 7.1.2] F 20 Burner control: (flow operated safety device).
Page 137 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting The following faults must only be rectified by qualified personnel: Fault Cause Rectification Check the sensor and cable and replace if neces- F 32...
Page 138 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting The following faults must only be rectified by qualified personnel: Fault Cause Rectification Interrupt the voltage supply temporarily F 55 Memory fault Reset appliance, replace appliance electronics WEM-FA-G if occurring repeatedly.
Page 139 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting The following faults must only be rectified by qualified personnel: Fault Cause Rectification Ensure heat demand. F 66 Calibration could not be carried out Subsequent error of W 22.
Page 140 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting The following faults must only be rectified by qualified personnel: Fault Cause Rectification Interrupt the voltage supply temporarily F 95 Internal fault Replace appliance electronics WEM-FA-G if oc- curring repeatedly.
Page 141: Operating Problems
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting 10.4 Operating problems Condensing boiler The following faults must only be rectified by qualified personnel: Observation Cause Rectification Burner is humming/whistling burner surface soiled / damaged, fleece...
Page 142 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting Fresh water storage The following faults must only be rectified by qualified personnel: Observation Cause Rectification Fresh water storage tank is leak- Hydraulic connection incorrect Check hydraulic connection.
Page 143 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 10 Troubleshooting The following faults must only be rectified by qualified personnel: Observation Cause Rectification DHW temperature too low Regulation shuts off too early Check sensor and regulation.
Page 144: Accessories
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 11 Accessories 11 Accessories 11.1 Externally powered anode Damage to the fresh water storage tank caused by gas accumulation Gas can accumulate when operating with an externally powered anode. In rare cases, this can lead to explosion cause by a spark.
Page 145 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 11 Accessories Refitting Replace seal 4 ensuring sealing surfaces are clean. Refit externally powered anode in reverse order and: place the green surface of the diode board 3 in such a way it faces nut 2, tighten screws with a torque of 8 Nm.
Page 146: Technical Documentation
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12 Technical documentation 12.1 Hydraulic versions 12.1.1 WTC version KI Hydraulic version Components / settings Explanation WTC version K The condensing unit loads the DHW stor- age tank or supplies heating circuit 1 via the...
Page 147 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation Hydraulic version Components / settings Explanation KI3 (A) WTC version K The condensing unit loads the DHW stor- age tank or supplies the plate heat ex- Components: changer via the internal three-way valve.
Page 148: Wtc Version Kp
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.1.2 WTC version KP Hydraulic version Components / settings Explanation WTC version K The condensing unit loads the DHW stor- age tank or supplies heating circuit 1 via the Components: internal three-way valve.
Page 149 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation Hydraulic version Components / settings Explanation KP3 (A) WTC version K The condensing unit loads the DHW stor- age tank or supplies the plate heat ex- Components: changer via the internal three-way valve.
Page 150: Control Options
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.2 Control options 12.2.1 Constant flow temperature No additional sensors or thermostats are required for this control. The flow temperature from the heating circuit is controlled to the flow setpoint tem- perature set in the user level, see [ch. 6.5.3].
Page 151: Weather Compensated/Room Control
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.2.4 Weather compensated/Room control The flow temperature of the heating circuit is controlled depending on the external temperature and the room temperature. An external sensor and room device or room sensor are required for weather com- pensated control and room temperature dependent control.
Page 152: Control Options
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.3 Control options Temperature remote control 0 … 10 V An additional module is required for temperature remote control. Connect analogue signal 0 … 10 V to input N1, observe the polarity [ch. 5.7.1].
Page 153: Circulation Pump
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.4 Circulation pump The following operating modes of the internal pump of the condensing unit are possible [ch. 6.6.2.2]: Load proportional With this type of control, the pump capacity is assigned to the burner capacity re- quired (pump capacity ≙...
Page 154: Inputs/Outputs
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.5 Inputs/outputs The inputs and outputs can be configured for various functions [ch. 6.6.9.5]. Depending on the hydraulic variant selected, the inputs and outputs are pre-as- signed, the function can then not be changed [ch. 12.1].
Page 155 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation WTC input H2 The function (contact position) of input H2 can be rotated using parameter Input H2 inverted . Setting Explanation Input not used The WTC is disabled for heating and DHW mode when the contact is closed.
Page 156: Factory Setting Engineer Level
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.6 Factory setting engineer level WTC - Parameters (P) Factory setting Setting range 5 min 0 … 30 min 2.1.1 Burner rapid cycle interlock heating...
Page 157 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation Heating circuits - parameters (P) Factory setting Setting range [ch. 12.7] [ch. 12.7] 6.1.1 Minimum flow setpoint temperature [ch. 12.7] [ch. 12.7] 6.1.2 Maximum flow setpoint temperature [ch. 12.7]...
Page 158 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation DHW - parameters (P) Factory setting Setting range KI: automatic [ch. 6.6.6.1] 7.1.1 Load strategy KP: comfort 3 … 10 K 7.1.2 Switching differential DHW KI: 15 K / KP: 3 K 2 …...
Page 159: Factory Setting Heating Circuit Type
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.7 Factory setting heating circuit type Depending on the heating circuit type set the following will be carried out automat- ically: parameters will be pre-assigned with factory settings, setting ranges will be limited.
Page 160: Factory Setting Heating Curve
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.7.1 Factory setting heating curve Heating curve dependent on the heating circuit type set: 17.5 / 7 K 14.0 / 7 K 10.0 / 7 K 10.0 / 0 K...
Page 161: Factory Setting Time Programs
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.8 Factory setting time programs Heating program (time program) Weekdays TimeOfDay Level 06:00 … 22:00 Time program 1 Mon - Fri Normal 22:00 … 06:00 Setback 07:00 …...
Page 162: Wiring Diagram Wem-Fa-G Device Electronics
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.9 Wiring diagram WEM-FA-G device electronics 1 Ionisation electrode 2 Gas combi valve immersion coil/valve 2 3 Gas combi valve valve 1 4 PWM signal and fan return signal...
Page 163: Sensor Variables
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.10 Sensor variables Flow sensor (eSTB) WTC Flue gas sensor WTC DHW sensor (B3) DHE sensor switch-on (B3) De-couple sensor (B2) Plate heat exchanger (B2)
Page 164: Remote Access To Heating System Via Internet
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 12 Technical documentation 12.11 Remote access to heating system via internet Remote access to the heating system via the Internet is possible via web browser or app.
Page 165: Project Planning
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 13 Project planning 13 Project planning 13.1 Expansion vessel and system pressure The unit is equipped with an integrated expansion vessel: Contents 10 litres, inlet pressure 0.75 bar.
Page 166: Weishaupt Energy Management Wem
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 13 Project planning 13.2 Weishaupt Energy Management WEM System device The display and operating unit (system unit) integrated in the condensing unit is the higher-level system unit (master) for the entire system. The system device can ad- dress all expansion modules connected to the system.
Page 167 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 13 Project planning System overview Example 1 System device 2 Direct heating circuit of condensing unit 3 Heating system extension module (WEM-EM-HK) 4 Room device or room sensor...
Page 168: Spares
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares 14 Spares 1.02 1.01 1.05 1.06 1.01 1.02 1.03 1.03 1.02 1.04 1.10 1.04 1.07 1.09 1.09 1.08 1.12 1.11 1.18 1.13 1.15 1.16 1.14...
Page 169 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares Pos. Description Order No. 1.01 Side panel WTC-GB 15/25-B vers. K/S – without recess 483 000 00 58 7 – with recess 483 000 00 59 7 1.02...
Page 170 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares 2.10 2.09 2.08 2.07 2.06 2.49 2.05 2.04 2.50 2.48 2.02 2.20 2.03 2.01 2.47 2.54 2.51 2.01 2.17 2.06 2.18 2.46 2.12 2.44 2.38...
Page 171 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares Pos. Description Order No. 2.01 Screw M5 x 16 DIN 6912 403 263 2.02 Compact gas combi valve CES with seals – WTC-G… 15-B 483 011 30 19 2 –...
Page 172 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares 2.10 2.09 2.08 2.07 2.06 2.49 2.05 2.04 2.50 2.48 2.02 2.20 2.03 2.01 2.47 2.54 2.51 2.01 2.17 2.06 2.18 2.46 2.12 2.44 2.38...
Page 173 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares Pos. Description Order No. 2.28 Ignition unit ZAG2 483 011 30 07 2 2.29 Ignition unit bracket 483 011 30 19 7 2.30 Cable tie with rivet PA 6.6 natural 481 011 22 11 7 2.31...
Page 174 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares 3.05 3.01 3.04 3.41 3.03 3.06 3.07 3.18 3.15 3.07 3.13 3.01 3.23 3.20 3.08 3.02 3.12 3.14 3.09 3.15 3.10 3.21 3.11 3.17 3.06...
Page 175 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares Pos. Description Order No. 3.01 Pipe holder for pipe Ø 18 mm 483 011 22 43 7 3.02 Splash guard for WEM plug 483 011 22 15 7 3.03...
Page 176 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares 3.05 3.01 3.04 3.41 3.03 3.06 3.07 3.18 3.15 3.07 3.13 3.01 3.23 3.20 3.08 3.02 3.12 3.14 3.09 3.15 3.10 3.21 3.11 3.17 3.06...
Page 177 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares Pos. Description Order No. 3.36 Cable loom ignition, fan, circulation pump 483 012 22 08 2 3.37 Screw W1452 2.2 x 6 409 376 3.38...
Page 178 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares 4.05 4.04 4.01 4.02 4.03 4.06 4.07 4.12 4.10 4.08 4.14 4.11 4.13 4.09 4.15 4.23 4.22 4.07 4.07 4.30 4.31 4.23 4.17 4.16 4.18...
Page 179 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares Pos. Description Order No. 4.01 Expansion vessel WTC 15/25-A vers. K 481 015 40 01 7 4.02 Expansion vessel holder right 481 015 40 02 2 4.03...
Page 180 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares WAS 100 Bloc-P/A 5.02 5.11 5.02 5.13 5.01 5.01 5.02 5.02 5.02 5.02 5.02 5.12 5.08 5.15 5.03 5.05 5.11 5.14 5.02 5.04 5.02 5.02...
Page 181 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares Pos. Description Order No. 5.01 End cap G¾ 409 000 04 10 7 5.02 Seal 17 x 24 x 2 (3/4") AFM-34/2 409 000 21 10 7 5.03...
Page 182 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares WAS 80 Power/Bloc-P/A 6.01 6.02 6.08 6.02 6.02 6.02 6.14 6.09 6.13 6.03 6.01 6.10 6.02 6.02 6.02 6.19 6.04 6.16 6.17 6.05 6.02 6.02...
Page 183 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares Pos. Description Order No. 6.01 End cap G¾ 409 000 04 10 7 6.02 Seal 17 x 24 x 2 (3/4") AFM-34/2 409 000 21 10 7 6.03...
Page 184 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares WAS 115 Power/Bloc-P/B 7.01 7.02 7.08 7.02 7.02 7.02 7.14 7.01 7.09 7.02 7.13 7.03 7.02 7.10 7.02 7.05 7.19 7.04 7.16 7.02 7.17 7.02...
Page 185 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares Pos. Description Order No. 7.01 End cap G¾ 409 000 04 10 7 7.02 Seal 17 x 24 x 2 (3/4") AFM-34/2 409 000 21 10 7 7.03...
Page 186 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares 8.01 186-196 83309302 1/2018-05 La...
Page 187 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares Pos. Description Order No. 8.01 Service kit Consisting of: Burner gasket Service cover seal Gasket ionisation electrode Ionisation electrode Gasket ignition electrode Ignition electrode Seal 17 x 24 x 2 (¾") AFM-34/2...
Page 188 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares 9.01 9.02 9.03 9.04 9.05 9.06 188-196 83309302 1/2018-05 La...
Page 189 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 14 Spares Pos. Description Order No. 9.01 Heat exchanger cleaning kit complete 483 000 00 39 2 9.02 Cleaning tool straight – Handle cleaning tool 481 000 00 67 7 –...
Page 190: Notes
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 15 Notes 15 Notes 190-196 83309302 1/2018-05 La...
Page 191: Key Word Index
Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 16 Key word index 16 Key word index Condensate................ 9 Condensate connection ............ 44 Access code ................ 63 Condensate hose............ 33, 44 Actual flow temperature ............ 70 Condensate lift pump............ 44 Actuator................. 13...
Page 192 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 16 Key word index EnEV Product Characteristics ......... 28 Gas characteristics ............ 40 Environmental characteristics .......... 31 Gas combi valve.......... 13, 68, 141 Error .................. 141 Gas connection pressure...... 40, 104, 114 eSTB ................
Page 193 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 16 Key word index Internet ................ 164 Operating phase .............. 66 Internet access .............. 164 Operating pressure ............ 25 Ionisation current.............. 16 Operating problems ............ 141 Ionisation electrode ........ 13, 16, 68, 123 Operating status .............. 65...
Page 194 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 16 Key word index Room air independent ............ 8 Status .................. 65 Room device .......... 50, 108, 109, 166 Storage.................. 22 Room frost protection ............ 81 Stratified tank............... 20 Room humidity.............. 58 Summer................. 59...
Page 195 Installation and operating instruction Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact 16 Key word index Water content.............. 25 Water hardness.............. 34 Water treatment ............ 34, 37 Weather compensation .......... 150 Web Portal ................ 63 Web-Portal................ 164 WEM Portal................ 63 WEM-FA-G.............. 13, 162 WEM-Portal ..........
Page 196 Max Weishaupt GmbH · 88475 Schwendi Weishaupt close by? Addresses, telephone numbers etc. can be found at www.weishaupt.de We reserve the right to make changes. All rights reserved. The complete program: Reliable technology and prompt, professional service W Burners up to 570 kW...

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Weishaupt WTC-GB 15-B Compact Installation And Operating Instruction

1 User Instructions

2 Safety

3 Product Description

4 Installation

5 Installation

6 Operation

7 Commissioning

8 Shutdown

9 Servicing

10 Troubleshooting

11 Accessories

12 Technical Documentation

13 Project Planning

14 Spares

15 Notes

16 Key Word Index

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