Viessmann BWC 301.C06 Installation And Service Instructions Manual

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Installation and service instructions

for contractors

Vitocal 300-G

Type BWC 301.C06 to C12

Heat pump with electric drive, 400 V~

■

Brine/water heat pump: 1.7 to 17.2 kW

With conversion kit to water/water heat pump: 2.3 to 22.6 kW

■

VITOCAL 300-G

6152073 GB

2/2023

VIESMANN

Please keep safe.

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Summary of Contents for Viessmann BWC 301.C06

Page 1 VIESMANN Installation and service instructions for contractors Vitocal 300-G Type BWC 301.C06 to C12 Heat pump with electric drive, 400 V~ ■ Brine/water heat pump: 1.7 to 17.2 kW With conversion kit to water/water heat pump: 2.3 to 22.6 kW ■...
Page 2 Safety instructions Safety instructions Please follow these safety instruc- tions closely to prevent accidents and material losses. Safety instructions explained Danger Note This symbol warns against the risk Details identified by the word "Note" of injury. contain additional information. Please note This symbol warns against the risk of material losses and environmen- tal pollution.
Page 3 Safety instructions Safety instructions (cont.) Safety instructions for working on the system Working on the system Please note Electronic assemblies can be dam- Isolate the system from the power sup- ■ aged by electrostatic discharge. ply, e.g. by removing the separate fuse Prior to commencing work, touch or by means of a mains isolator, and earthed objects such as heating or...
Page 4 Further measures before starting work Replace faulty components only on the refrigerant circuit with flammable with genuine Viessmann spare refrigerants (R32): parts. Remove all flammable materials and ■ Auxiliary components, spare and...
Page 5 Draining heat pump on the secondary side ........... 64 Checking the temperature sensors ............64 Viessmann NTC 10 k (blue marking) ..........65 ■ Ω Viessmann Pt500A (green marking) ........... 66 ■ NTC 10 k (no marking) ..............67 Ω ■...
Page 6 Index Index (cont.) 6. Commissioning/service Hydraulic parameters report ..............69 reports Control parameter report ............... 69 7. Specification Specification for brine/water heat pumps ..........80 Specification for water/water heat pumps ..........82 8. Appendix Commissioning order ................83 9. Declaration of Conformity Declaration of conformity ...............
Page 7 Information Disposal of packaging Please dispose of packaging waste in line with statu- tory regulations. Symbols The steps in connection with commissioning, inspec- Symbol Meaning tion and maintenance are found in the "Commission- Reference to other document containing ing, inspection and maintenance" section and identified further information as follows: Step in a diagram:...
Page 8 A separate well circuit provides the primary cir- cuit with heating energy via a separating heat exchanger (accessories). The components of the well circuit and primary circuit are controlled by the heat pump control unit. System examples Available system examples: See www.viessmann-schemes.com.
Page 9 Information Product information (cont.) Spare parts lists Information about spare parts can be found at www.viessmann.com/etapp or in the Viessmann spare part app.
Page 10 Preparing for installation Requirements concerning on-site connections 230 V~/ < 42 V 400 V~ A B C D E Fig. 1 Primary circuit flow (heat pump brine inlet), con- Secondary circuit flow (heating circuits), connec- nection Cu 28 x 1.5 mm tion Cu 28 x 1.5 mm Primary circuit return (heat pump brine outlet), Secondary circuit return (heating circuits DHW cyl-...
Page 11 Preparing for installation Siting and transport requirements (cont.) Installation room requirements Please note Minimum clearances Unfavourable ambient conditions can lead to malfunctions and appliance damage. The installation room must be dry and free from the risk of frost: Ensure ambient temperatures between 0 and ■...
Page 12 Installation sequence Siting the heat pump Removing the front panels Fig. 3...
Page 13 Installation sequence Siting the heat pump (cont.) Removing the heat pump module Fig. 4...
Page 14 Installation sequence Siting the heat pump (cont.) Fig. 5 Fig. 6...
Page 15 Installation sequence Siting the heat pump (cont.) Fig. 7 Transporting the heat pump module The heat pump module is removed. 2. At least 2 people are required to carry the heat pump module. 1. Insert the two arms of the transport aid at the front and rear of the heat pump module: See Fig.
Page 16 Installation sequence Siting the heat pump (cont.) Levelling the heat pump 1. 4x Fig. 8 Hydraulic connections Connecting the primary/secondary circuits ■ The pipes of the primary circuit/secondary circuit Note connection set are located in the EPP box, which is We recommend fitting shut-off devices to the connec- positioned on top of the appliance on delivery.
Page 17 Installation sequence Hydraulic connections (cont.) Fitting the primary/secondary circuit connection set (standard delivery) Fig. 9 Primary circuit flow (heat pump brine inlet), con- Secondary circuit flow (heating circuits), connec- nection Cu 28 x 1.5 mm tion Cu 28 x 1.5 mm Primary circuit return (heat pump brine outlet), Secondary circuit return (heating circuits DHW cyl- connection Cu 28 x 1.5 mm...
Page 18 4. Insulate pipes inside the building to prevent heat 3. Thermally insulate lines inside the building. and vapour diffusion. Note 5. Fill the primary circuit with Viessmann heat transfer ■ For underfloor heating circuits, install a temperature medium and vent.
Page 19 Installation sequence Electrical connection (cont.) Danger Required cable lengths in the heat pump plus wall Incorrect wiring can lead to serious injury from clearance electrical current and result in appliance dam- age. Cable lengths Take the following measures to prevent drifting ■...
Page 20 Installation sequence Electrical connection (cont.) Opening the wiring chamber Fig. 10...
Page 21 Installation sequence Electrical connection (cont.) Fig. 11 Installing the programming unit Fig. 12...
Page 22 Installation sequence Electrical connection (cont.) [XÖ Fig. 13 Fig. 14...
Page 23 Installation sequence Electrical connection (cont.) Routing the cables to the wiring chamber < 42 V 230 V~ 400 V~ Fig. 15...
Page 24 Installation sequence Electrical connection (cont.) Connecting the Vitoconnect (accessories) < 42 V Fig. 16...
Page 25 Installation sequence Electrical connection (cont.) Overview of electrical connections 193D Fig. 17 Luster terminals (connections N and Mains terminals for heat pump control unit: See X1 Terminals for earth conductors of all associ- page 38. ated system components F1 Fuse 6.3 A (slow) X2 Terminals for neutral conductors of all associ- Expansion PCB on main PCB (230 V~ compo- ated system components...
Page 26 Installation sequence Electrical connection (cont.) Main PCB (function components 230 V~) Information regarding the connection values Set the required parameters during commissioning: The specified output is the recommended connected See page 49 onwards. ■ load. ■ Total output of all components connected directly to the heat pump control unit (e.g.
Page 27 Installation sequence Electrical connection (cont.) Plug Terminals Function Explanation 214.1 External hook-up, heating/cooling cir- 230 V~ digital input: cuits: 230 V~: Central heating demand for heating circuit ■ Central heating demand, heating cir- M2/HC2 active cuit M2/HC2 0 V: No demand ■...
Page 28 Installation sequence Electrical connection (cont.) Expansion PCB on main PCB (230 V~ components) Information regarding the connection values Set the required parameters during commissioning: The specified output is the recommended connected See page 49 onwards. ■ load. ■ Total output of all components connected directly to the heat pump control unit (e.g.
Page 29 Installation sequence Electrical connection (cont.) High limit safety cut-out for heat pump in conjunc- Connection on external heat generator to terminals tion with external heat generator for "External demand" High limit safety cut-out to protect the heat pump (max. 70 °C) X3.1 K1 Relay Sizing according to the external heat generator...
Page 30 Installation sequence Electrical connection (cont.) Plug Terminals Function Explanation 224.7 Supply values Output: 100 W ■ Circulation pump for DHW reheating Voltage: 230 V~ ■ Max. switching current: 4(2) A ■ Control of immersion heater Immersion heater EHE 400 V~ Immersion heater 230 V~ (on site) 224.7 224.7...
Page 31 Installation sequence Electrical connection (cont.) Plug Terminals Function Explanation 225.1 Heating circuit pump of the heating Connect a temperature limiter in series to restrict the circuit with mixer M2/HC2 maximum temperature of underfloor heating circuit (if installed). Note In systems without heating water buffer cylinder the temperature limiter is connected to X3.2/X3.14 at the luster terminals: See chapter "Temperature limiter to re- strict the maximum temperature of underfloor heating...
Page 32 Installation sequence Electrical connection (cont.) Terminals Function Explanation X3.2 In systems without heating water Floating contact (N/O contact) required: ■ X3.14 buffer cylinder: Temperature limiter Closed: Blocking enabled ■ or at EA1 ex- to restrict the maximum tempera- Open: No blocking ■...
Page 33 Installation sequence Electrical connection (cont.) Terminals Function Explanation X3.8 X3.9 Pressure switch, primary circuit Requires floating contact: and/or Closed: Safety chain has continuity ■ Open: Safety chain interrupted; heat pump shut down ■ Breaking capacity 230 V~, 0.15 A ■ Frost stat Connection: Connected in series if 2 safety components are instal-...
Page 34 Installation sequence Electrical connection (cont.) Plug Sensor/component Type KM-BUS (wires interchangeable) — Use the KM-BUS distributor (accessories) if several devices are connected. KM-BUS subscribers (examples): Mixer extension kit for heating circuit M3/HC3 ■ Remote control (set heating circuit allocation on the remote control) ■...
Page 35 Installation sequence Electrical connection (cont.) Converting temperature limiter part no. 7151728, 7151729 into a N/O contact Fig. 23...
Page 36 Installation sequence Electrical connection (cont.) Fig. 24 Colour coding to IEC 60757: Assembling the temperature limiter: Steps 1 to 3 in Brown reverse order Black GNYE Green/yellow System with heating water buffer cylinder If the temperature limiter installed to restrict the maxi- Please note mum temperature of underfloor heating circuit If the temperature limiter installed to restrict the...
Page 37 Installation sequence Electrical connection (cont.) Connecting the temperature limiter, part no. General connection of a temperature limiter 7151728, 7151729 to the mixer extension kit X2.N sÖ sÖ Fig. 25 Fig. 27 Connection 212.2 on main PCB Connection 225.1 on expansion PCB Plug sÖ...
Page 38 Installation sequence Electrical connection (cont.) [{{] 0-10V L1 N Fig. 28 EA1 extension Circulation pump for swimming pool heating Power supply 1/N/PE 230 V/50 Hz (accessories) Junction box (on site) Temperature controller for swimming pool temper- ature control (floating contact: 230 V~, 0.1 A, Fuses and contactor for circulation pump for swim- ming pool heating (accessories) accessories)
Page 39 Installation sequence Power supply (cont.) In negotiations with your power supply utility, differ- When using power generated on site (use of power ■ ■ ent supply tariffs for the main power circuits may be generated by the PV system to meet own require- offered.
Page 40 Installation sequence Power supply (cont.) Instantaneous heating water heater power supply 400 V~ Please note Economy tariff and power-OFF can be used ■ Operating the instantaneous heating water No parameters need to be set when using economy ■ heater without heating water damages the indi- tariff with power-OFF.
Page 41 Installation sequence Power supply (cont.) Power supply with power-OFF: With on-site load disconnect The power-OFF signal is connected to the on-site con- Compressor tactor of the economy tariff power supply and to the Economy tariff meter heat pump control unit. The compressor and instanta- Feed: TNC system neous heating water heater are "forced"...
Page 42 Installation sequence Power supply (cont.) Mains power supply in conjunction with on-site power consumption Without power-OFF E1E2 D /D L1 L1 L2 L2 L3 L3 Fig. 34 Heat pump Bi-directional meter (for PV systems to consume Additional consumers (of power generated on site) power on site): in the household Energy taken from power supply utility and energy...
Page 43 Installation sequence Power supply (cont.) Connection to EA1 extension Condition: "Enable Smart Grid 7E80" must be at "1". [{{] 0-10V Fig. 35 EA1 extension Floating N/O contact 2: The agreement of the Connection to controller and sensor PCB power supply utility may be required Floating N/O contact 1: The agreement of the Power supply 1/N/PE 230 V/50 Hz power supply utility may be required...
Page 44 Installation sequence Make connections at terminals X3.8/X3.9 After connecting the power supply, one of the follow- ing components must be connected at terminals X3.8 and X3.9: ■ Primary circuit pressure switch and/or frost stat jumper supplied ■ Closing the heat pump Please note Danger Leaking hydraulic connections lead to appliance...
Page 45 Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance Commissioning steps Inspection steps Maintenance steps Page • • • 1. Opening the heat pump..................... 46 • 2. Writing reports........................46 • • • 3. Checking the refrigerant circuit for leaks................ 46 •...
Page 46 Commissioning, inspection, maintenance Opening the heat pump Danger Please note Contact with 'live' components can lead to seri- Refrigerant can escape when working on the ous injury from electric current. refrigerant circuit. ■ Never touch the wiring chambers (heat pump Work on the refrigerant circuit must only be car- control unit and power supplies: See chapter ried out by a certified contractor (in accordance...
Page 47 Temperature differential between primary circuit flow and return: 3 K to 5 K. 1. Check the pre-charge pressure of the expansion vessel. 2. Charge the primary circuit with Viessmann heat transfer medium and vent. Note Ensure frost protection down to at least 15 °C.
Page 48 Commissioning, inspection, maintenance Filling and venting the secondary side Unsuitable fill and top-up water increases the level of 1. Open any non-return valves installed on site. deposits and corrosion. This can lead to system dam- age. 2. Check the pre-charge pressure of the expansion Hard water can also cause damage to the instantane- vessel.
Page 49 Commissioning, inspection, maintenance Checking the electrical connections for firm seating Danger Contact with live components can lead to seri- ous injury from electric current. Some compo- nents on PCBs remain live even after the power supply has been switched off. Never touch the wiring chambers (for heat ■...
Page 50 Commissioning, inspection, maintenance Commissioning the system (cont.) Switch ON the ON/OFF switch on the control unit. ■ The prompt "Start commissioning?" appears auto- matically on commissioning. Note The commissioning assistant can also be started manually: To do this, press and hold when switching on the control unit (progress bar visible).
Page 51 Commissioning, inspection, maintenance Commissioning the system (cont.) Select language Date/time Time Date setting setting setting Commissioning start? Check Secondary circuit "Secondary circuit filled" filled? Instantaneous heating Instantaneous heating water heater enable water heater blocked Code Parameter group Parameter level 1 select setting Temperature...
Page 52 Commissioning, inspection, maintenance Commissioning the system (cont.) Setting parameters using "System scheme 7000" Alternatively, if the service menu was already active: as an example Extended menu: To set a parameter, first select the parameter group and then the parameter. å Service menu: 2.
Page 53 Energy meter — Ventilation unit — X Component is selected. For detailed information on system examples: See Component may be added. www.viessmann-schemes.com. Parameters for circulation pumps and other components Heating circuit pump Parameter Setting "System definition" Ó "System scheme 7000"...
Page 54 Commissioning, inspection, maintenance Commissioning the system (cont.) External extension Parameter Setting "System definition" Ó "External extension 7010" "1" EA1 extension "2" AM1 extension "3" EA1 and AM1 extensions Note For parameters for external functions, see the following table. Parameters for external functions External demand Parameter Setting...
Page 55 Commissioning, inspection, maintenance Commissioning the system (cont.) External hook-up for heating/cooling circuits Parameter Setting "Heating circuit 1"/"Heating circuit 2"/"Heating circuit 3" Ó "Remote control 2003" "2" "Remote control 3003" "Remote control 4003" Cooling function parameters Parameter Setting "Cooling" Ó "Cooling function 7100" "0"...
Page 56 Commissioning, inspection, maintenance Commissioning the system (cont.) Please note After the value "1" has been set for "Enable instantaneous heating water heater 7900", the prompt "Secondary circuit filled?" auto- matically appears. If this prompt is responded to with "No", the instantaneous heating water heater will not be enabled.
Page 57 Commissioning, inspection, maintenance Commissioning the system (cont.) Possibly set additional parameters. Parameter Setting "System definition" Ó ≙ "Start hysteresis solar air absorber 7031" "0" to "500" ( 0 to 50 K) "Min. runtime to suppress summer mode 7035" "0" to "1440" min "Last calendar week for summer mode 7036"...
Page 58 Commissioning, inspection, maintenance Commissioning the system (cont.) Adjust values for Vitovent 200-W/300-C/300-W if necessary Parameter Setting "Ventilation" Ó "Set room temperature C108" Max. 4 K higher or lower than "Stand- ard room temperature 2000" (adjust- ≙ ment value: 1 0.1 °C) "Background ventilation C109"...
Page 59 Commissioning, inspection, maintenance Commissioning the system (cont.) Parameters for utilisation of power generated on site Parameter Setting "Photovoltaics" Ó "Enable own energy consumption PV 7E00" "1" ≙ "Threshold for electrical power 7E04" "0" to "300" ( 0 to 30 kW) Enable required functions for utilisation of power generated on site Parameter Setting...
Page 60 Commissioning, inspection, maintenance Checking the system function Displaying the system overview The system overview displays the status of the heat 2. "Diagnosis" pump and system components as well as the tempera- tures. 3. "System overview" Service menu: to toggle between "System overview, generation side"...
Page 61 Commissioning, inspection, maintenance Closing the heat pump Please note Danger Leaking hydraulic connections lead to appliance The absence of system component earthing can damage. lead to serious injury from electrical current and ■ Check for leaks in the internal and on-site component damage in the event of an electrical hydraulic connections.
Page 62 Maintenance Opening the casing door Open the casing door: See chapter "Removing the heat pump module" on page 13. Overview of electrical components Fig. 42 Inverter Mains terminals for instantaneous heating water EEV PCB (refrigerant circuit controller) heater (left) and compressor (right) Main PCB (MB 761) Heat pump control unit power supply Controller and sensor PCB (CU 401)
Page 63 Maintenance Overview of internal components Fig. 43 Oil separator Primary circuit air vent valves Safety high pressure switch Secondary circuit air vent valve, condenser High pressure sensor Condenser Low pressure sensor 3-way diverter valve "central heating/DHW heat- Low pressure Schrader valve ing"...
Page 64 For PCB locations in the heat pump: See page 62. For sensor locations in the heat pump: See page 63. Sensor Test element Connection Outside temperature sensor (F0) Viessmann NTC 10 k Controller and sensor PCB Ω ■ Buffer temperature sensor (F4) (blue marking) ■...
Page 65 Maintenance Checking the temperature sensors (cont.) Viessmann NTC 10 k (blue marking) Ω / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k ϑ...
Page 66 Maintenance Checking the temperature sensors (cont.) Viessmann Pt500A (green marking) / °C / °C R / / °C R / / °C R / / °C R / / °C R / ϑ Ω ϑ Ω ϑ Ω ϑ Ω...
Page 67 Maintenance Checking the temperature sensors (cont.) NTC 10 k (no marking) Ω / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k ϑ...
Page 68 Maintenance Checking the fuses (cont.) 2. Opening the wiring chamber. Danger Removing the fuse does not switch the power 3. Check fuses. Replace if necessary. circuit to zero volt. Contact with 'live' compo- nents can lead to serious injury from electric cur- Danger rent.
Page 69 Commissioning/service reports Hydraulic parameters report Setting and test values Setpoint Commissioning Maintenance/ Service Frost protection (brine medium) °C min. – Testing the external heating circuit pumps Circulation pump type Circulation pump stage Overflow valve setting Commissioning, primary circuit Primary circuit flow temperature °C ("Diagnosis"...
Page 70 Commissioning/service reports Control parameter report (cont.) Parameter Code Delivered condition Commission- Maintenance/ service Use of heat pump in cascade 700C Runtime balance cascade 700D Do not adjust! External extension 7010 System components for external change- 7011 over Operating status for external changeover 7012 Duration of external changeover 7013...
Page 71 Commissioning/service reports Control parameter report (cont.) External heat generator Parameter Code Delivered condition Commission- Maintenance/ service "Enable external heat source" 7B00 "Priority ext. heat source/instant. heating 7B01 water heater" ≙ "Dual mode temperature external heat 7B02 100 ( 10 °C) source"...
Page 72 Commissioning/service reports Control parameter report (cont.) Parameter Code Delivered condition Commission- Maintenance/ service ≙ Shutdown hysteresis inst. heating water 601E 10 ( 1 K) heater Cylinder primary pump enable 601F Operating mode cylinder primary pump 6020 Change in secondary pump speed during 6033 DHW heating Enable elec.
Page 73 Commissioning/service reports Control parameter report (cont.) Internal hydraulics Parameter Code Delivered condition Commission- Maintenance/ service Heat pump for drying a building 7300 Time program for screed drying 7303 ≙ Set flow temperature external demand 730C 500 ( 50 °C) ≙ Start threshold 730E 300 (...
Page 74 Commissioning/service reports Control parameter report (cont.) Heating circuit 1 Parameter Code Delivered condition Commission- Maintenance/ Service ≙ "Standard room temperature" 2000 200 ( 20 °C) ≙ "Reduced room temperature" 2001 160 ( 16 °C) "Remote control" 2003 Room temperature control 2005 ≙...
Page 75 Commissioning/service reports Control parameter report (cont.) Cooling Parameter Code Delivered condition Commission- Maintenance/ service Cooling function 7100 Cooling circuit 7101 ≙ Set room temperature separate cooling cir- 7102 200 ( 20 °C) cuit ≙ Min. flow temperature cooling 7103 200 ( 20 °C) Influence room temperature hook-up cooling 7104...
Page 76 Commissioning/service reports Control parameter report (cont.) Parameter Code Delivered condition Commission- Maintenance/ service ≙ Control voltage matching 7D27 0 V) Fan for control voltage matching 7D28 Strategy, passive frost protection 7D2C Type of heat exchanger 7D2E Installation position 7D2F Function, external 230 V input, ventilation 7D3A Duration, bathroom vent.
Page 77 Commissioning/service reports Control parameter report (cont.) Parameter Code Delivered condition Commission- Maintenance/ service Intensive ventilation C10C Vitovent 200-W: ■ 75 % Vitovent 300-C: ■ 125 m Vitovent 300-W: ■ 225 m Background ventilation, second fan duct C189 15 % Reduced ventilation, second fan duct C18A 25 % Standard ventilation, second fan duct...
Page 78 Commissioning/service reports Control parameter report (cont.) Photovoltaics Parameter Code Delivered condition Commission- Maintenance/ service Enable own energy consumption PV 7E00 ≙ Prop. of external current 7E02 0 %) Threshold for electrical power 7E04 Type BWC ■ 331.C06: ≙ 19 ( 1.9 W) Type BWC ■...
Page 79 Commissioning/service reports Control parameter report (cont.) Communication Parameter Code Delivered condition Commission- Maintenance/ service Enable LON communication module 7710 LON subscriber number 7777 LON fault manager 7779 LON system number 7798 Interval for data transfer via LON 779C 20 min Source outside temperature 77FC Send outside temperature...
Page 80 Specification Specification for brine/water heat pumps Type BWC 301.C06 301.C12 Performance data to EN 14511 (B0/W35, 5 K spread) Rated heating output 4.28 5.31 Cooling capacity 3.45 4.35 Power consumption 0.91 1.10 Coefficient of performance (COP) 4.70 4.80 ε Modulation range heating min. to max. 1.7 to 8.6 2.4 to 11.4 Brine (primary circuit)
Page 81 Specification Specification for brine/water heat pumps (cont.) Type BWC 301.C06 301.C12 Power consumption Primary pump (high efficiency circulation pump) 25 to 87 25 to 87 Energy efficiency index EEI 0.21 0.21 ≤ ≤ ■ Secondary pump (high efficiency circulation pump) 8 to 59 8 to 59 Energy efficiency index EEI...
Page 82 Specification Specification for brine/water heat pumps (cont.) Type BWC 301.C06 301.C12 Energy efficiency class to Commission Regulation (EU) No 813/2013 Heating, average climatic conditions Low temperature applications (W35) ■ Medium temperature applications (W55) ■ Heating performance data to Commission Regulation (EU) No 813/2013 (average climatic conditions) Low temperature applications (W35) Energy efficiency...
Page 83 Components for ventilation fully installed (optional) Components for PV system fully installed (optional) Preferred appointment: Date Time Date Time The work that is requested to be carried out by Viessmann will be billed in accordance with the latest Viessmann pricelist. Place / Date Signature...
Page 84 Declaration of Conformity Declaration of conformity We, Viessmann Limited, Hortenwood 30, Telford TF1 7YP, United Kingdom, declare as authorised rep- resentative of the manufacturer and in sole responsibil- ity for the manufacturer, that the named product com- plies with the applicable UK regulations in terms of its design and operational characteristics.
Page 85 Keyword index Keyword index Control unit Air vent valve – Controller and sensor PCB........33 – Condenser...............63 – Expansion PCB............28 – Secondary circuit.............63 – Main PCB..............26 Air vent valves Cooling............... 26 – Primary circuit............63 Cooling circuit.............18 Ambient temperatures..........11 Cooling function...........
Page 86 Keyword index Keyword index (cont.) Flow – DHW cylinder............ 10, 17 KM-BUS distributor............ 34 – Primary circuit........... 10, 17 – Secondary circuit..........10, 17 Flow temperature sensor Leak test...............44, 61 – Cooling circuit............33, 64 Liquid gas temperature sensor......63, 64 – Heating circuit............64 Low pressure sensor..........63 –...
Page 87 Keyword index Keyword index (cont.) Pt500A............... 64 Parameter group selection......... 52 Pumps..............26, 63 Parameters – Circulation pump for DHW reheating...... 53 – Cooling function............55 RCD..............40, 41 – DHW circulation pump..........53 Recommended power cable........19 – Electric booster heater..........55 Refrigerant circuit............
Page 88 – Parameters, type Pt500A........66 Weight..............11, 81 Terminator, Modbus............34 Wiring chamber............20 Three-way diverter valve..........63 Tilting angle..............10 Viessmann Climate Solutions SE Viessmann Limited 35108 Allendorf / Germany Hortonwood 30, Telford Telephone: +49 6452 70-0 Shropshire, TF1 7YP, GB...

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