Related Manuals for Lochinvar TTW Series
Summary of Contents for Lochinvar TTW Series
- Page 1 FLOOR STANDING GAS FIRED CONDENSING CIRCULATING TYPE WATER HEATER Installation Commissioning and Maintenance instructions MODELS TTW410 TTW580 Installation manual_TTW_December 2018...
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Page 3: Table Of Contents
Table of Contents INTRODUCTION ......................................6 ANCILLARY OPTIONS: ..................................6 SAFETY GUIDELINES ....................................7 GENERAL DESCRIPTION OF SAFETY SYMBOLS USED........................7 WHAT TO DO IF YOU SMELL GAS ..............................8 PRINCIPLE PARTS ....................................8 CASING ........................................8 ELECTRICAL ......................................9 GAS TRAIN AND AIR INLET ................................. - Page 4 13.0 CONTROL OPTIONS/INSTALLATION ..............................38 13.1 VESSEL TEMPERATURE SENSOR SINGLE WATER HEATER INSTALLATION................38 13.1 location of flow temperature sensor (fs) on a single vessel installation ....................39 13.2 location of flow temperature sensor (fs) on a multiple vessel installation .................... 39 13.3 SENSOR WIRING ....................................
- Page 5 19.1 GENERAL......................................89 19.2 FIRING FOR THE FIRST TIME ................................90 20.0 ADJUSTING AND SETTING THE BURNERS ............................91 20.1 INTRODUCTION ....................................91 20.1.1 ADJUSTMENT TABLES .................................. 91 20.1.2 ADJUSTMENT VALUES .................................. 91 20.1.3 PRE ADJUSTMENT SETTINGS FOR GAS VALVES ........................93 20.1.4 GAS VALVE SETTING SCREWS: DRAWING ..........................
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Page 6: Introduction
INTRODUCTION The Lochinvar TTW is a floor standing gas-fired condensing water heater. The equipment comprises of two stainless steel radial burner assemblies and a heat exchanger that permits fully condensing operation. The burners are initiated by cascaded electronic ignition sequence controls that incorporate spark ignition and flame rectification devices for supervision of the flame. -
Page 7: Safety Guidelines
SAFETY GUIDELINES READ AND UNDERSTAND THE INSTRUCTIONS Read and fully understand all instructions before attempting to operate maintain or install the unit. Keep these instructions near the water heater for quick reference. This equipment must be installed by a competent person, registered with the H.S.E. approved body. All installations must conform to the relevant Gas Safety and Building Regulations. -
Page 8: What To Do If You Smell Gas
Do not re-enter the building until it is safe to do so Lochinvar Limited is not liable for any damage caused by inaccurately following these installation instructions. Only original parts may be used when carrying out any repair or service work. -
Page 9: Electrical
3.2 ELECTRICAL Item No Description E04-016-425 RELAY LC1D09 E04-016-291 CONNECTOR PLUG 2 POLE E04-016-292 CONNECTOR PLUG 3 POLE E04-016-293 CONNECTOR PLUG 4 POLE E04-016-295 CONNECTOR PLUG 6 POLE E05-001-062 RUBBER PLUG 15mm S04-000-310 REPLACEMENT KIT DISPLAY WATER HEATER CONTROL SLAVE-STATE TYPE AND SERIAL NO WATER HEATER CONTROL MASTER-STATE TYPE AND SERIAL NO S04-016-582 FUSE SET x10... -
Page 10: Technical Data
TECHNICAL DATA Model Number TTW410 TTW580 GENERAL DATA Product I.D. Number CE 0063BS3806 Classification 2H3B/P Input (gross) min-max 55.4 - 444 75.5 - 611 Input (net) min-max 50 - 400 68 - 550 Recovery Rate (44° ΔT) l/hr 8168 11263 Recovery Rate (50°... -
Page 11: Dimensions And Clearance
DIMENSIONS AND CLEARANCE 5.1 DIMENSIONS 5.1.1 DIMENSIONS TTW410 5.1.2 DIMENSIONS TTW580 Minimum Side Clearance of 500mm (Advised 1000mm) Minimum Front Clearance of 800mm Minimum Rear Clearance of 500mm 5.1.3 MINIMUM CLEARANCES... -
Page 12: Water Heater Connections
5.2 WATER HEATER CONNECTIONS Rear view 5.2.1 WATER HEATER CONNECTIONS Connection Function Diameter (inch/mm) combustion air inlet Ø 180 mm flue outlet Ø 180 mm water flow (outlet) R 2½ " water return (inlet) R 2½ " gas connection R 2 ” condensate discharge hose Ø... -
Page 13: Condensate Drain Connection
5.3 CONDENSATE DRAIN CONNECTION The condensate drain is placed at the centre and at the bottom of the water heater and has a ¾ inch hose discharge. Connect this flexible hose to a suitable drain point. Use only plastic parts with the condensate drain. Blockage of this drain may damage the water heater. -
Page 14: General Requirements
On delivery, immediately check that the water heater is complete and without any defects. Report any damage immediately to Lochinvar Limited. The Lochinvar TTW has been designed to operate trouble free for many years. These instructions should be followed closely to obtain the maximum usage and efficiency of the equipment. PLEASE read the instructions fully before installing or using the appliance. -
Page 15: Related Documents
6.1 RELATED DOCUMENTS It is law that all gas appliances are installed by competent persons, in accordance with The Gas Safety (Installation and Use) Regulations 1998. Failure to install appliances correctly could lead to prosecution. It is in your own interest, and that of safety, to ensure that this law is complied with. -
Page 16: Water Quality
LOCATION 8.1 PLANT ROOM REQUIREMENTS The Lochinvar TTW condensing water heater can only be installed in a room that complies with the appropriate ventilation requirements. The Lochinvar TTW can be used as a type C or C appliance. -
Page 17: Unpacking And Levelling The Water Heater
8.3 UNPACKING AND LEVELLING THE WATER HEATER The water heater is mounted on a pallet with a wooden support frame around it. The water heater is wrapped in shrink wrap before the wooden support frame is mounted. After the frame is placed the whole pallet, water heater and frame package is shrink wrapped again. -
Page 18: Gas Supply
GAS SUPPLY The Lochinvar TTW is suitable for use on second and third family gasses 2H - G20 - 20mbar and 3P - G31 - 37mbar. Details relating to Natural Gas (2H) appear below; for details relating to Propane (3P) please refer to Section 17.1.4 GAS TYPE SELECTION. -
Page 19: Flue System
Before installation of any flue system read the installation manual carefully for both the appliance and flue system to be used. Information on the flue system Supplied by Lochinvar can be found within this manual. -
Page 20: Flue Terminal Position
When used as a type C appliance, the approved, purpose designed adaptive flue system should be used. For further details, please contact Lochinvar Limited. When used as a Type B appliance, a suitable flue system constructed of Stainless Steel or Polypropylene with a temperature rating in excess of 120C should be used. -
Page 21: Water Heater Categories - Types Of Flue Gas Systems
10.6 WATER HEATER CATEGORIES - TYPES OF FLUE GAS SYSTEMS. Type according EN 15502-2-1: 2012 Performance Description B23(P) Open * Roof terminal Flue Air supply from * Without draught diverter Outlet room * Water heater room air supply. * P = overpressure systems Be aware: The installation room has to have sufficient air supply vents. - Page 22 Closed * Appliance sold without flue/air-inlet ducts Air supply from * The flue gas parts are not part of the water heater. The outside water heater is intended to be connected to a separately Flue outlet approved and marketed system for the supply of Air inlet combustion air and discharge of combustion products.
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Page 23: Type C 63 Certified
10.7 TYPE C CERTIFIED In general, water heaters are certified with their own flue gas material. For type B23(P), C13, C33, C43, C53 and C83 systems, only use flue gas and air supply parts approved for use with the appliance. If a heater is C63 certified, no specific type flue gas material has been certified in combination with the water heater. -
Page 24: Type C 53 (Twin Pipe) Flue Systems
10.9 TYPE C (TWIN PIPE) FLUE SYSTEMS Flue system specifications MANUFACTURER MUELINK AND GROL (M&G) TEMPERATURE CLASS T120 FLUE GAS MATERIAL PP Each Twin-Pipe starter assembly includes the items shown in the tables below TWIN-PIPE FLUE ASSEMBLY MODELS TTW410,TTW580 COMPONENTS REQUIRED TO START INSTALLATION VERTICAL FLUE... -
Page 25: Example A: Twin Pipe System
10.9.1 EXAMPLE A: TWIN PIPE SYSTEM Calculation example: EXAMPLE A INLET AIR MUST BE CLEAN FREE WATER. ALWAYS USE A WIRE MESH TO PREVENT DEBRIS BEING INLET AIR MUST BE CLEAN DRAWN INTO THE AIR INLET. AND FREE OF WATER. USE A WIRE MESH WHEN THERE IS RISK OF DEBRIS BEING DRAWN INTO THE... -
Page 26: General Twin-Pipe Installation Guidelines
10.10 GENERAL TWIN-PIPE INSTALLATION GUIDELINES The images shown below may not represent the equipment supplied, images and instructions are for general guidance only... -
Page 29: Type B 23 (Conventional Flue With Fan Assistance)
ELBOW 90° Ø200mm PP M70412 BEND 45° Ø200mm PP LV310677 T PIECE WITH CONDENSATE CONNECTOR Ø200mm PP M87198 WALL CLAMP Ø200mm When using flue pipe supplied by Lochinvar the guidance given in section 10.10 is also applicable for B23 systems. -
Page 30: Example B: Single Pipe System For Flue Gas Outlet Only
10.11.1 EXAMPLE B: SINGLE PIPE SYSTEM FOR FLUE GAS OUTLET ONLY Calculation example: INLET AIR MUST BE CLEAN FREE WATER. ALWAYS USE A WIRE MESH TO PREVENT DEBRIS BEING DRAWN INTO THE AIR INLET. Water heater type: TTW410 Diameter: 180 mm. Number Pa total Straight tube m¹... -
Page 31: Separate Air Supply And Flue Terminal For A Pitched Roof
10.12 SEPARATE AIR SUPPLY AND FLUE TERMINAL FOR A PITCHED ROOF connection tube pitched roof adhesive flashing flue gas roof terminal door air inlet roof duct 90° bend ventilation grill... -
Page 32: Common Flue Systems
COMMON FLUE SYSTEMS The Lochinvar TTW can be installed on to a common flue system if required. The common flue system should be sized to operate under a negative pressure of -0.03 to -0.10 mbar throughout the modulation range of the appliance. -
Page 33: Combustion Ventilation
11.3 COMBUSTION VENTILATION When used as a Type C appliance, ventilation for combustion is not necessary as the combustion air is ducted directly from outside. When used as a Type B appliance, the combustion air requirements are as follows: PLANT ROOM ENCLOSURE HIGH GROSS... -
Page 34: Water Connections
It is strongly recommended that unvented hot water systems be installed by an approved installer. If the Lochinvar TTW water heater is to be used in an unvented arrangement, the system should follow the guidance given in BS6700 and must comply with Building Regulations 1992: Part G3,in England and Wales,P5 in Northern Ireland and P3 in Scotland.. -
Page 35: Circulating Pumps
In order to ensure the correct flow rates through the water heater, the unit requires a bronze glanded pump sized to overcome the resistance of the TTW water heater and any primary pipework loop. Lochinvar will supply a suitable bronze glanded shunt pump with every TTW water heater sized to overcome the resistance of the TTW water heater plus the following primary pipework loop: ... -
Page 36: Pipework Header Sizes For Common Installations
TTW580 76mm TTW580 76mm * n/a contact Lochinvar Technical support for assistance 12.4.2 PIPEWORK HEADER SIZES FOR COMMON INSTALLATIONS 12.4.3 PIPEWORK SCHEMATICS For applications outside the parameters shown, please contact Lochinvar TSG for further guidance before proceeding with any installation. -
Page 37: Pressure Relief Valve
PRESSURE RELIEF VALVE The Lochinvar TTW has no internal pressure relief valve. A pressure relief valve must be fitted in between the water heater and any isolation valve. When multiple water heaters are installed, each water heater must have its own pressure relief valve. -
Page 38: Control Options/Installation
13.0 CONTROL OPTIONS/INSTALLATION 13.1 VESSEL TEMPERATURE SENSOR SINGLE WATER HEATER INSTALLATION TTW requires a flow temperature sensor that needs to be fitted between the cold feed/building return and the storage vessel, this should be located as close as possible to the storage vessel on the return pipework to the water heater(s)–... -
Page 39: Location Of Flow Temperature Sensor (Fs) On A Single Vessel Installation
13.1 LOCATION OF FLOW TEMPERATURE SENSOR (FS) ON A SINGLE VESSEL INSTALLATION On systems with multiple storage vessels it is recommend that the water heaters only read the temperature of a single vessel, the vessels should be balanced so they are all the same temperature. -
Page 40: Schematics
14.0 SCHEMATICS Lochinvar limited may provide technical advice and guidance to assist with best practice, optimisation and installation of Lochinvar products; however, we will not be liable for any duties as designers under construction (design and management regulations 2015). In all cases where information is provided, the customer must assess and manage risks associated with the technical information and advice provided. -
Page 41: Multiple Water Heaters With Multiple Storage Vessels Not In Cascade
14.2 MULTIPLE WATER HEATERS WITH MULTIPLE STORAGE VESSELS NOT IN CASCADE 14.3 MULTIPLE WATER HEATERS WITH MULTIPLE STORAGE VESSELS IN CASCADE... -
Page 42: Electrical Installation
15.0 ELECTRICAL INSTALLATION Wiring external to the equipment must be installed in accordance with the I.E.E. Regulations and any local regulations that apply. MODEL NORMAL SUPPLY VOLTAGE EXTERNAL FUSE RATING POWER CONSUMPTION TTW410 752 W 230V AC/50 Hz 6.0 A 1 PH TTW580 829 W... -
Page 43: Wiring Connections
15.3.2 WIRING CONNECTIONS The following components can be connected to the water heater; see the figure below. For voltages from 110V to 250V use the left conduit and for low voltage use the right conduit. 15.3.3 WIRING TERMINALS... -
Page 44: Wiring Terminals
0V line to terminal 16. A link wire must not be connected to terminals 57 & 58 when 0 – 10V control is used. The Lochinvar TTW water heater has a built in cascade management system. When two or more water heaters are connected in a cascade, each water heater of the cascade has to be connected to the next water heater using terminals 61 &... -
Page 45: Mains Supply Connection - Three-Phase Supply
15.4 MAINS SUPPLY CONNECTION – THREE-PHASE SUPPLY. 15.4.1 3-PHASE ELECTRICAL SUPPLY CONNECTION When using a 3-Phase circulating pump, a 400 VAC/50 Hz/3 Ph/N/GND power supply should be connected to the rail-mounted terminal blocks located to the rear of the wiring connection panel via a suitable isolator. The 230 VAC power supplies to the control panel are already connected and should not be altered. -
Page 46: Wiring Diagrams
15.7 WIRING DIAGRAMS internal connections ionistion and/or ignition display siphon pressure switch (PSW) N.C. Non Return Valve NRV end contact 10 1 ref.1 clixon/maximum (S7) water thermostat 24vdc CN15 WIRING COLORS K0=white K1=yellow fan Hall CN10 fan control fan PWM K2=brown +24Vdc K3=green... -
Page 47: Upper Burner Wiring Diagram (Pcb A, Left)
15.7.1 UPPER BURNER WIRING DIAGRAM (PCB A, LEFT) separate ionisation input. (always active) boiler casing ignition transformer incl. WIRING COLORS ionisation input. K0=white K6=blue K1=yellow K7=red K2=brown K8=black K3=green K9=purple K4=grey K10=yellow/green K5=orange CN not used 9 10 CN10 cascade connection 230Vac mains (internal) - Page 48 internal connections ionisation and/or ignition display bottom Non Return Valve NRV end contact 10 1 clixon/maximum (S7) water thermostat 24vdc CN15 WIRING COLOR K0=white K1=yellow fan Hall CN10 fan control fan PWM K2=brown +24Vdc K3=green K4=grey 24Vdc not used K5=orange flow sensor ntc (S1) 10K CN12 CN11...
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Page 49: Lower Burner Wiring Diagram (Pcb B, Right)
15.7.3 LOWER BURNER WIRING DIAGRAM (PCB B, RIGHT) bottom separate ionisation input. (always active) boiler casing ignition transformer incl. WIRING COLORS ionisation input. K0=white K6=blue K1=yellow K7=red CN10 K2=brown K8=black K3=green K9=purple K4=grey K10=yellow/green K5=orange CN12 CN11 CN not used 9 10 CN10 (opt.) -
Page 50: Sensor Values
15.8 SENSOR VALUES The following temperature sensors have been fitted in the Lochinvar TTW. Sensors S1 and S2 are located on the rear right-hand side of the heat exchanger with one of each connected to each burner control. Flow temperature sensor (orange wire) -
Page 51: Control System
16.0 CONTROL SYSTEM 16.1 CONTROL PANEL Two control panels have been placed on top of each other. The top panel controls the burner at the top of the heat exchanger and is the “master”. This panel controls the complete water heater. Only when a lock out / error of the top burner has occurred, the water heater can be controlled by the bottom panel of the water heater (automatically). -
Page 52: Control Panel / Menu Structure
FIGURE 12.1 CONTROL PANEL 16.2 CONTROL PANEL / MENU STRUCTURE BASE SCREEN : (appears during operation) WTRHTR : No demand / Standby / burning > > > : 1 1 8 ° C ( 1 2 5 ° C ) . - Page 53 HOW TO CONFIRM CHANGES When changes have been made in one of the nine menus below, the user presses ENTER to confirm these changes. To prevent anyone from making changes by mistake, the following happens when changes are made: Step 1: The user presses [ENTER] to confirm the change made or [MENU] to exit the menu without changes.
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Page 54: Display During Operation
16.3 DISPLAY DURING OPERATION During normal operation, the text in the display shows the status of the water heater. In the following graphs, the displays during normal operation are explained. Display at WATER HEATER / HOT WATER DEMAND Heat demand type: Actual status: >... -
Page 55: Monitor Screens
16.4 MONITOR SCREENS During normal operation and stand-by, the “◄” and “►” buttons can be used to show some water heater information, including measured temperatures, settings and data. In the following graphs is explained which values can be shown in the display. When no button is activated for 2 minutes, the display will return to its status display. - Page 56 SCREEN: 0 = MASTER, 1 ..11 = SLAVES Displays number, priority and state of cascade water 1 2 3 4 5 7 8 9 A heaters. DESCRIPTION "CASCINFO" Screen 11 Shows the number of water heaters connected with the Cascade. The Master/Lead water heater is designated as 0. Slave/Lag water heaters will be designated 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B.
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Page 57: Service Function
16.5 SERVICE FUNCTION The following graphs describe how to use the service function. Operating screen: W A T R H T R T A N D > > > 1 2 3 ° 1 2 3 4 ° Press [SERVICE] and hold for 3 seconds. The burner will start and show the display below. -
Page 58: Programming In Standby Mode
16.7 PROGRAMMING IN STANDBY MODE Standby Programming the settings of the water heater is done at the control panel of the top burner, this is the left panel. Use the standby mode for modifying water heater settings without interaction with the water heater control. Changes are confirmed by leaving standby mode. -
Page 59: Set Points
16.9 SET POINTS The following graphs describe how to program the hot water set points. DHW set point normal/day time: (parameter P4 AA = 1/2) D H W p o i ° maximum actual This is the water temperature set point that is active during the temperature will never exceed the programmed DHW periods (parameter P4 AA = 1/2) value set at heating setpoint... -
Page 60: Hot Water Program
16.11 HOT WATER PROGRAM > > > From previous page < < < Setting DHW program times: D H W M o n Press [►] to browse through the values that can be set at the bottom line. The blinking value can be changed. Press [▲] &... -
Page 61: Anti Legionnaires' Disease Program
16.12 ANTI LEGIONNAIRES’ DISEASE PROGRAM See the following graphs. The standard factory setting for this function is “OFF”. > > > From previous page with HOT WATER part < < < Setting legionella program (day and time): L e g o n e M o n Press [►] to browse through the values that can be set at the bottom... -
Page 62: Checking The Operating History
16.13 CHECKING THE OPERATING HISTORY The following graphs describe how to check the operating history of the water heater. Operating screen: > > > ° 1 2 3 ° Press [MENU] Select "Operate" using [◄] & [►] and press [ENTER] Main menu screen: M e n u Press [◄] &... -
Page 63: Checking The Fault History
16.14 CHECKING THE FAULT HISTORY The following graphs describe how to check the fault history of the water heater. Operating screen: W A T R H T R > > > 1 2 3 ° 1 2 3 ° Press [MENU] Select "Faulthist"... -
Page 64: Setting The Maintenance Specifications
16.15 SETTING THE MAINTENANCE SPECIFICATIONS 16.15.1 MAINTENANCE SETTINGS The unit can be programmed in such a way that an automatic maintenance message is displayed. There are three options that can be selected. A maintenance message appears after: * A programmed date is reached. * An amount of burning hours is reached. - Page 65 From previous page Screen: Selecting message at certain date. n t e n M o d e Press [►] to set: The date for the maintenance message. Press [◄] to: Return to maintenance mode selection. Press [►] to browse through the values that can be set at the bottom line.
- Page 66 From previous page Screen: Message after total amount of burning hours. M o d e B u r n Press [►] to set: The total amount of burning hours for the Maintenance message. Press [◄] to: Return to maintenance mode selection. The blinking value can be changed with [▲] &...
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Page 67: Setting The User Lock
16.16 SETTING THE USER LOCK The following graphs describe how to activate the user lock of the display. The standard factory setting for this function is “OFF”. The "USER LOCK" menu. In this menu the water heater can be locked for (end-)users. 0 = UNLOCKED 1 = LOCKED When the water heater is unlocked, the user can enter the... -
Page 68: Setting The Parameters By The Display Menu
16.17 SETTING THE PARAMETERS BY THE DISPLAY MENU The functions of the controller are embedded in the electronics. The values and settings of these controlling functions are called parameters. They can be changed by a skilled and trained service engineer with the help of a computer, the correct software and an interface cable. A selection of these parameters can be programmed on the unit itself, without the use of a computer. - Page 69 Operating screen: A T I N G : b o i > > > 4 ° 4 ° Press [MENU] The screen texts on these pages are standard part of the boiler software Select "Parameter" using [◄] & [►] and press [ENTER] and apply to CH systems and/or hot water devices.
- Page 70 Menu A: Heating ° Select the cascaded water heaters supply temperature control. This parameter is the proportional range of the selected CH supply The screen texts on these pages are temperature of EACH water heater of the total cascade and of the external standard part of the boiler software (cascade) sensor.
- Page 71 Menu B: Hot water ° Pasteurisation function of the water heater. This parameter is the selected The screen texts on these pages are hot water temperature during the pasteurisation function of the water standard part of the boiler software heater. and apply to CH systems and/or hot water devices.
- Page 72 Menu B: Hot water D H d Function for the direct hot water water heater. This parameter is the integration time of the selected HW temperature of The screen texts on these pages are the water heater. standard part of the boiler software and apply to CH systems and/or hot water devices.
- Page 73 Menu C: Cascade Function for the cascading of the water heater(s). The screen texts on these pages are This parameter is activated when an external (extra) water heater is standard part of the boiler software connected to the Master water heater. Connect to the Master connections and apply to CH systems and/or hot 21-22.
- Page 74 Menu C: Cascade Function for the cascading of the water heater(s). This parameter is activated when an external (extra) water heater is The screen texts on these pages are connected to the Master water heater. Connect to the Master connections standard part of the boiler software 21-22.
- Page 75 Menu D: General Function for setting the maximum overrun time of the fan (Maximum 10 minutes). The screen texts on these pages are 0 = Switch off standard part of the boiler software and apply to CH systems and/or hot water devices.
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Page 76: Fault Codes Display
16.18 FAULT CODES DISPLAY The following graphs describe the lock out codes of the water heater. A lock out code can only be removed by a manual resetting of the water heater. NOTICE: Before resetting the water heater always check the water heater, central heating system and all components corresponding to the related lock out description. - Page 77 Display message Reason Flame detected during normal operation, but was lost while running. Display message Reason Flame signal is detected while it cannot be expected. Display message Reason The controller does not detect a correct fan speed. Display message Reason Software parameters have been programmed.
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Page 78: Blocking Codes
The following graphs describe the blocking codes of the water heater. A blocking code is only a temporary blocking of the water heater, because of an extraordinary situation. The water heater will continue to operate after stabilisation of this situation. 16.18.2 BLOCKING CODES The display is not blinking, but is lightened up during the blocking period. - Page 79 Display message Reason Water pressure is too low or too high. Display message Reason Outdoor temperature has exceeded the blocking temperature which is set in the parameters. Display message Reason Temperature difference between flow and return exceeds the blocking value but not the lock out value. Display message Reason One of the cascaded water heaters causes an error, because of a lock out.
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Page 80: Important Message
16.18.3 IMPORTANT MESSAGE The following graphs describe the messages at the water heater display. Depending on the selected and activated options for the water heater, it is possible that some messages will show up at the display of the water heater. For example a maintenance message after a certain programmed date has been reached. -
Page 81: Soft Start Option
For each setting, the relevant Soft start settings are automatically adjusted, dependent of its main setting P4BE.. In case of gas conversion, paste the corresponding PROPANE G31 P PROPAN P4BD = 1 sticker at the appropriate position in the water heater PROPANO and mark the square for the used gas type. -
Page 82: Water Heater Options
17.2 WATER HEATER OPTIONS 17.2.1 0-10 VDC REMOTE FLOW TEMPERATURE SET POINT The hot water temperature is controlled by connecting an external 0-10 VDC signal to the water heater (connections 15-16). P5 BB Analogue input Config (0=off 1=temp 2=power) (display D1). This parameter must be set at "1"... -
Page 83: Tank Sensor Sensitivity
P5CI = 5°C P5CD = 70 °C This is the bandwidth within which the Legionnaires' temperature This is the maximum temperature during anti must stay during the programmed duration time period. In this Legionnaires' disease function period. example the temperature is allowed to fluctuate between 65°C and 70°C during the anti-Legionnaires’... -
Page 84: Cascade Control
17.3 CASCADE CONTROL Before commissioning a cascade installation, a number of parameters have to be changed. These parameters can be programmed on the unit itself, without the use of a computer. NB! Remember that a TTW water heater is already a cascade of two burners, so cascading TTW water heaters gives a multiple of 2-burner cascades. - Page 85 PARAMETERS PARAMETERS PARAMETERS PARAMETERS master slave 4 slave 6 slave 2 slave 1 slave 5 slave 7 slave 3 CASCADE CONNECTION Now on each single water heater of the cascade, on both control panels, the following two parameters must be selected and programmed according to the above drawing.
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Page 86: Monitor Screens
When cascade connection is programmed correctly, the water heater display will show the following. Explanation "Cascade communication indicator" NO CASCADE COMMUNICATION > > > no.1 Always showing the fixed ">>>" CORRECT CASCADE COMMUNICATION > no.1 > no.2 > Showing alternating no.1 & no.2 with 1-second interval. 17.3.2 MONITOR SCREENS To obtain cascade information, see 16.4. -
Page 87: Commissioning The Water Heater
18.0 COMMISSIONING THE WATER HEATER 18.1 FIRST: FLUSHING THE WATER HEATER WITH WATER After installation of the water heater the first step, before commissioning, is to flush the water heater and the whole DHW installation with fresh water to remove pollution, debris and other materials that might cause a blocking. This must also be done with installations, where only the water heater is replaced. -
Page 88: Flow Monitoring
By pressing the [SERVICE] button of the water heater, the water heater can be started without a heating demand. The water heater will start to fire and also the pump will start to run. Firing of the water heater without a water flow (but filled with water!) will cause the so called “boiling noises”. -
Page 89: Starting The Water Heater
19.0 STARTING THE WATER HEATER 19.1 GENERAL The gas input pressure for the water heater to operate properly under the correct load, must be at high fire more or equal to the minimum gas inlet pressure for the supplied gas type, as stated in the technical specification data table on page 5. * Gas valve screws and nipples: see picture on page 76. -
Page 90: Firing For The First Time
19.2 FIRING FOR THE FIRST TIME After commissioning the water heater and avoiding any possible heat demand (remove the thermostat connection lead), the water heater displays the following message: Display message N G : > > > ° ° Reason Water heater is active, but there is no heat demand. -
Page 91: Adjusting And Setting The Burners
20.0 ADJUSTING AND SETTING THE BURNERS Before carrying out any adjusting of the burner, carefully read this complete chapter. 20.1 INTRODUCTION Always adjust the burners after one of the following events: - A new water heater has been installed - As part of a service/maintenance check, in case the CO values prove to be incorrect Adjustment procedures for case A are described in 20.2. - Page 92 Figure 1: Gas type G20 The CO level may never be in the hatched area. Figure 2: Propane G31: The CO level may never be in the hatched area. Figure 3: B/P: propane/ butane mixture G30/ G31 The CO level may never be in the hatched area. Check the setting of parameter P4BD (gas type) 0 = Standard gas;...
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Page 93: Pre Adjustment Settings For Gas Valves
PRE ADJUSTMENT SETTINGS GAS VALVES NUMBER OF TURNS OPEN (COUNTER CLOCKWISE) NAT. GAS G20 AND G25 PROPANE G31 AND B/P WATER HEATER TYPE BURNER 0.75 TTW 410 bottom 0.75 TTW 580 bottom In accordance with EN437 20.1.3 PRE ADJUSTMENT SETTINGS FOR GAS VALVES 20.1.4 GAS VALVE SETTING SCREWS: DRAWING Description... -
Page 94: How To Remove And Mount The Flue Plug
20.1.5 HOW TO REMOVE AND MOUNT THE FLUE PLUG: Make sure during measurement in one measuring hole, that the other one is closed. When several measurements are done in both holes alternately, the unused hole may be temporarily Scotch taped or closed by means of a rubber plug. -
Page 95: Adjustment Actions: General Scheme
20.1.6 ADJUSTMENT ACTIONS: GENERAL SCHEME General scheme for adjustment of the gas valve(s). Consult this scheme for an overview. To complete all the necessary adjustments in the right order, follow case A or B top-down through the scheme (B involves a few extra steps (grey text blocks): GENERAL SCHEME: ADJUSTMENT STEPS case A... -
Page 96: Note: Co Measuring Position
20.1.7 NOTE: CO MEASURING POSITION This chapter describes the procedure for adjusting and checking CO values by measuring at the front of the water heater, using the upper measuring hole for adjusting the top burner and the lower measuring hole for adjusting the bottom burner. When both burners are on, a deviation from the single burner measurements occurs: the upper hole shows CO values higher than the nominal value, the lower hole shows CO... -
Page 97: Checking And Adjusting The Bottom Burner
Minimum load adjustment. Press [▼] button until minimum load is reached. Display message > > > ° ° Water heater is activated and operates at service mode at minimum. By setting screw [3], adjust the gas valve to obtain the CO value shown in 20.1.2 ... -
Page 98: Adjusting After Gas Valve Replacement Or In Case Of Gas Conversion (Case B)
20.3 ADJUSTING AFTER GAS VALVE REPLACEMENT OR IN CASE OF GAS CONVERSION (CASE B) In case of gas conversion, apply the corresponding PROPANE G31 P PROPAN P4BD = 1 sticker at the appropriate position in the water PROPANO heater and mark the square for the used gas type. PROPAAN Also, mark the square, indicating that the correct BUTANE/PROPANE... -
Page 99: Putting The Water Heater Out Of Operation
21.0 PUTTING THE WATER HEATER OUT OF OPERATION It is recommended to have the water heater operational all year round to prevent any frost damage during the winter and/or rotating parts getting jammed during other times of the year (built in water heater safety features). OUT OF OPERATION: On/off function. -
Page 100: Fault Codes, Blocking Codes
22.0 FAULT CODES, BLOCKING CODES 22.1 FAULT CODES IMPORTANT: To avoid electric shocks, disconnect electrical supply before performing troubleshooting. To avoid burns, allow the unit to cool before performing troubleshooting. Be aware that a fault code is an indication that the unit or the system needs attention. When repeatedly having faults these should not be neglected. - Page 101 Display message e m p u m p Reason: Maximum return temperature exceeds limit value. Cause: Systems that pre-heat the water heater return temperature too high. Corrective action: Reduce pre heat temperature of external heat source. Cause: The need for heat in the system suddenly drops causing hot return water to the. Corrective action: Dampen external heating system control to prevent sudden water heater temperature rise.
- Page 102 Cause: It is not proven that the non-return valve of the unit is closed. Corrective action: Check and repair or replace NRV. Display message u m p Reason Flue sensor is not detected by the water heater PCB. Cause: Bad wiring/connection in the flue gas sensor circuit. Corrective action: Check for loose wiring/connections in the flue gas sensor circuit.
- Page 103 Display message u m p Reason Water heater not operational after 4 starting attempts. Cause: No spark. Corrective action: Check the ignition electrode and replace/clean if necessary. Check the state of the ceramic insulator. A small crack can prevent the spark to form at the end of the electrode.
- Page 104 Display message a m e u m p Reason Flame signal lost during operation. Cause: Bad gas supply pressure. Corrective action: Be aware that the specified gas pressure must be met during all operation conditions. Check if all gas valves in the supply line are completely open. Check if the dirt filters mesh in the gas valve inlet is clean.
- Page 105 Display message a m e u m p Reason Flame signal detected, while water heater should not fire for operation. Cause: The flame detection circuit detects a flame which is not supposed to be present. Corrective action: Check the ignition/ionisation electrode and make sure it is clean (or replace it). Check the power supply voltage for a correct polarity.
- Page 106 Display message u m p Reason: Heat exchanger fuse exceeded maximum value. Cause: The thermal fuse of the heat exchanger has opened permanently. Corrective action: Switch off the electrical power and gas supply and contact supplier. Display message u m p Reason: Maximum thermostat exceeds limitation value.
- Page 107 Cause: The condensate drain system is blocked. The condensate will build up above the measuring point of the pressure switch and creates a static pressure larger than the measuring point. Corrective action: Check if the condensate drain hose between the heat exchanger and the siphon is open, so the condensate can flow freely to the siphon.
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Page 108: Blocking Codes
22.1.2 BLOCKING CODES The display is not blinking, but is lightened up during the blocking period. The water heater is blocking an action, because of an extraordinary situation. This action will be continued after stabilisation of this situation. Display message e m p Reason: Flow temperature has exceeded the blocking temperature, but it has not... - Page 109 Reason The controller received a new heat demand too fast after the last demand ended. Cause: Opening and immediately thereafter closing of the external thermostat. Corrective action: Controlled water flow cools down too quickly after loss of heat demand. Controlled water flow heats up too quickly after start of heat demand. Immediately opening and closing of the external thermostat.
- Page 110 Display message Reason Non return valve still open. Cause: It is not proven that the non-return valve of the burner, that is not burning, is closed. Corrective action: When a closed non return valve is proven this message will disappear. If not a lockout message will appear.
- Page 111 Display message Reason General blocking circuit is activated during operation (general blocking contacts 7-8). Cause: The circuit connected to the general blocking terminals is not closed. Corrective action: Check all external components that are connected to the general blocking terminals and check why the contact is not closing at heat demand.
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Page 112: Maintenance Attention Message
22.1.3 MAINTENANCE ATTENTION MESSAGE The display shows alternating the base screen and this message, while backlight is blinking. The water heater is operating, but will count the exceeding hours. A parameter must be changed, after service, to remove this message. Display message Reason Maintenance option of total amount of ignition cycles has been reached. -
Page 113: Maintenance
23.0 MAINTENANCE 23.1 GENERAL To ensure the TTW water heater continues to perform safely and efficiently regular maintenance must be carried out at least every 12 months. Maintenance and inspection of the water heater should be carried out at the following occasions: ... -
Page 114: Flue Gas & Air Supply
23.4.3 FLUE GAS & AIR SUPPLY The flue gas pipes and the air supply pipes must be checked for gas tightness. Also check if the mounting of these pipes is correct, safe and not damaged. Check the rooftop of the water heater housing for signs of water leakage and traces of water coming from the air supply pipe, the air vent or any condensate coming from the flue gas pipes. -
Page 115: Non Return Valve
I I I tighten in given order torque value = 8 Nm 23.5.1 NON RETURN VALVE Remove the non-return valve from the fan by loosening the nuts and remove the wiring by disconnecting the connector. Check if there is any moist or any traces of moist on the fan side of the valve. -
Page 116: Heat Exchanger And Burner Room
Hand the user the documents supplied with the heater and mention that they are important and need to stay close to the water heater. 26.0 WARRANTY Full warranty terms and conditions are available at www.lochinvar.ltd.uk... - Page 117 NOTES NOTES _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________...