Lennox GWB8-075IE-2 - Manual

5 INSTALLATION PROCEDURE WARNING Improper installation, adjustment, alteration, service or maintenance could result in death or serious injury . ! 1. The installation must conform to the requirements of the authority having jurisdiction or, in the absence of such requirements, to the National Fuel G...

6 VENTILATION & COMBUSTION AIR Provide combustion air and ventilation air in accordance with the section “Air for Combustion and Ventilation,” of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or Sections 8.2, 8.3 or 8.4 of Natural Gas and Propane Installation Code, CAN/CSA B149.1, or applicab...

7 1. Refer to local codes and appropriate ASME Boiler and Pressure Vessel Code for additional installation requirements. 2. Install relief valve on 3/4” pipe nipple in tapped boiler opening. A. Pipe discharge line following guidelines in preceding Warning . See Figure 2. B. Discharge line pipe size ...

9 • Install radiation units (panels, radiators or cabinets) and supply and return mains fi rst then make connections at boiler. • Verify clean water supply is available when connecting cold water supply to water valve. Install sand strainer at pump when water supply is from well or pump. • Provide l...

10 Check Your Chimney Chimney must be clean, right size, properly constructed and in GOOD CONDITION. 1. Installation must conform to requirements of the authority having jurisdiction or, in absence of such requirements, to the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or of the Natural Gas and Pro...

CHECK YOUR CHIMNEY For boilers for connection to gas vents or chimneys, vent installations shall be in accordance with “Venting of Equipment”, of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or of the Natural Gas and Propane Installation Code, CAN/CSA B149.1, or applicable provisions of the loca...

13 OPTIONAL HORIZONTAL VENTING INSTRUCTION Horizontal venting with a power venter is an alternate method of sidewall venting. This boiler is CSA listed for sidewall venting with standard single wall galvanized or Type B vent pipe when using the following power venter kits, which were speci fi cally ...

14 CAUTION WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance.• Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Follow gas supplier’s instructions. • If you cannot reach your gas supplier, call the ...

15 GAS SUPPLY PIPING *Outside diameter: Measure length of pipe or tubing from gas meter or propane second stage regulator. Table 6 - NATURAL GAS Length of Pipe - Ft. Pipe Capacity - BTU Per Hour Input Includes Fittings ½" ¾" 1" 1¼" 20 92,000 190,000 350,000 625,000 40 63,000 130,000 ...

16 ELECTRICAL WIRING Electrical WiringSee wiring diagram Figure 10 page 18 for details. Refer to Ladder Diagram from document envelope received with boiler. Electrically bond boiler to ground in accordance with requirements of authority having jurisdiction. Refer to: • USA- National Electrical Code,...

17 Sequence of Operation - Figure 10, Page 18. 1. Thermostat calls for heat, control relay contacts. 2. Circulator pump is powered through terminals C1 and C2. Control holds off burner and attempts to satisfy thermostat with residual boiler heat. 3. Induced draft blower and transformer primary are p...

18 WIRING DIAGRAMS Figure 10 - Control Module Damper is not an option.

19 Filling System With Water • Close air vents on all radiation units. Open valves to these units. • Verify boiler and expansion tank drain valves are closed. Air bleed screw on tank drain fi tting should be closed. • Open valve in line from boiler to expansion tank. • Open water inlet to your boile...

20 Operating Instructions. 1. STOP! Read Safety Information on previous page . 2. Set the thermostat to lowest setting. 3. Turn off all electric power to the appliance. 4. This appliance is equipped with an ignition device which automatically lights the burner. Do not attempt to light pilot by hand....

21 Figure 12 - Automatic Gas Valve Gas Valve Safety Shutdown Test WARNING Electrical shock hazard. Follow instructions to turn off electric power. Failure to do so could result in death or serious injury. ! Ignition system safety shutoff device must be tested after placing boiler in operation. With ...

22 CHECKING AND ADJUSTING Main burner fl ame should form sharp blue inner mantel with no yellow. Figure 14 - Main Burner Flame Adjust Thermostat Heat Anticipator Instruction for fi nal adjustment of thermostat are packaged with thermostat. 1. Set Heat anticipator at .2. 2. Check thermostat operation...

23 Burners Beginning of heating season visually check pilot and main burner fl ames. See Figures 13, and 14. Safety Relief Valve Test safety relief valve for proper operation. Refer to valve manufacturer’s instructions packaged with relief valve. Expansion Tank (Non-diaphragm) Tank may become waterl...

24 You may avoid inconvenience and service calls by checking these points before you call for service: IF YOUR SYSTEM IS NOT HEATING OR NOT GIVING ENOUGH HEAT . . . POSSIBLE CAUSE WHAT TO DO Thermostat is not set correctly Reset thermostat Burner is not operating properly Check fl ame. If it is yell...

25 SAFETY RELIEF VALVE Safety relief valve is required on your boiler. Water expands as it is heated. If there is no place for water to expand into, water pressure will build up inside boiler and system. Should this happen, safety relief valve will automatically open at predetermined pressure. This ...

26 EQUIPMENT & OPTIONAL ACCESSORIES PRESSURE SWITCH Air pressure switch works on negative pressure. When blower comes on air pressure switch operates intermittent pilot and gas valve. Air pressure switch is factory set and will only work when blower operates properly. It will not allow boiler to...

27 APPENDIX A - CONTROL MODULE A.1 Installation Environment Considerations WARNING If you do not follow these instructions exactly, a fi re or explosion may result causing property damage, personal injury or loss of life. • Do not use this appliance if any part has been under water. Immediately call...

29 APPENDIX A - CONTROL MODULE A.6 Boiler High Limit Temperature Controller • When water temperature reaches setpoint, controller ends heating cycle. • When water temperature drops below setpoint minus differential, controller restarts heat cycle to re-heat boiler water. • If water temperature excee...

30 APPENDIX A - CONTROL MODULE Table 2 - Troubleshooting Error Codes Error Code Number De fi nition Consequence 2 Pressure switch failed to open (stuck closed). Wait for recovery 4 Flame current too low. Check for fl ame. Non critical alarm 6 Flame sensed out of normal sequence (before opening or af...

31 APPENDIX A - CONTROL MODULE STEP 3: Check spark ignition circuit. Disconnect ignition cable at SPARK terminal on module. WARNING Electrical shock hazard. Ignition circuit generates over 10,000 volts. Turn OFF electrical power supply at service panel before making electrical connections. Failure t...