Lennox GWB8-262E-2 - Manual

5 4 - INSTALLATION PROCEDURE Table 3 - MINIMUM CLEARANCE DIMENSIONS Inches (mm) Top 6” (152mm) Rear 6” (152mm) Control Side 7” (178mm) Opposite Side 6” (152mm) Front 18” (457mm) Flue/Vent Connector 6” (152mm) Near Boiler Piping 1/2” (13mm) WARNING Improper installation, adjustment, alteration, servi...

6 5 - 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 appl...

7 6 - CONNECTING SUPPLY AND RETURN PIPING RELIEF VALVE DISCHARGE LINE Check local codes for maximum distance from fl oor or allowable safe point of discharge . WARNING Burn or Scald Hazard. Discharge line shall be installed to relief valve outlet connection to avoid burns, scalding, or water damage ...

8 6 - CONNECTING SUPPLY AND RETURN PIPING WARNING Burn and scald hazard. Safety relief valve could discharge steam or hot water during operation. In- stall discharge piping per these instructions. ! Figure 3 - Temperature Pressure Gauge Verify clean water supply is available to water inlet valve. In...

10 Figure 6 - BYPASS PIPING - CIRCULATOR ON SUPPLY Figure 7 - BYPASS PIPING - CIRCULATOR ON RETURN Bypass Piping Required For High Mass (Large Water Content) Systems 6 - CONNECTING SUPPLY AND RETURN PIPING

11 Boilers connecting 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 “Venting Systems and Air Supply for Appliances,” of the Natural Gas and Propane Installation Code, CAN/CSA B149.1, or applicabl...

12 Minimum Vent Pipe Clearance Wood and other combustible materials must not be closer than 6” from any surface of single wall metal vent pipe. Listed Type B vent pipe or other listed venting systems shall be installed in accordance with their listing. Removing Existing Boiler From Common Venting Sy...

13 8 - VENT DAMPER OPERATION Figure 8 - Vent Damper Installation Figure 9 - Vent Damper Placement Annually check vent damper and all fl ue product carrying areas of appliance, with particular attention given to deterioration from corrosion or other sources. If you see corrosion or other deterioratio...

14 9 - GAS SUPPLY PIPING 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 g...

15 10 - ELECTRICAL WIRING Electrically bond boiler to ground in accordance with requirements of authority having jurisdiction. Refer to: • USA- National Electrical Code, ANSI/NFPA 70.• Canada - Canadian Electrical Code, Part I, CSA C22.1: Safety Standard for Electrical Installations. ELECTRIC POWER ...

16 11 - WIRING DIAGRAMS Figure 12 - Integrated High Limit Electronic Ignition Control (240008781) I Inducer is not an option. WARNING Modi fi cation, substitution or elimination of factory equipped, supplied or speci fi ed components may result in personal injury or loss of life. !

19 12 -GENERAL INSTRUCTIONS 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 ...

20 13 - LIGHTING INSTRUCTIONS 1. STOP! Read the safety information above. 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 pilot. Do not try to light the pilot by hand. OFF ON ...

21 14 - OPERATING YOUR BOILER AUTOMATIC GAS VALVE Automatic Gas Valve opens or closes according to heat requirements of thermostat and temperature limit control. It closes if pilot goes out. Each individual control must be operating correctly before any gas can pass to burners. Any one control can h...

22 14 - OPERATING YOUR BOILER CHECK THERMOSTAT OPERATION A. When set above temperature indicated on thermostat, boiler should ignite. B. Verify thermostat turns boiler off when room temperature reaches selected setting and starts boiler operating when room temperature falls a few degrees. C. After s...

23 15 - MAINTAINING YOUR BOILER BURNERS Beginning of heating season visually check pilot and main burner fl ames. See Figure 16. SAFETY RELIEF VALVE Refer to page 7 for important information. To test safety relief valve refer to valve manufacturer’s instructions packaged with relief valve. Call Tech...

24 EQUIPMENT AND OPTIONAL ACCESSORIES - WHAT THEY DO 16 - SERVICE HINTS You may avoid inconvenience and service calls by checking these points before you call for service. Possible Cause What to do Thermostat is not set correctly Reset thermostat above room temperatureBurner is not operating properl...

25 17 - EQUIPMENT AND OPTIONAL ACCESSORIES EXPANSION TANK Expanding water fl ows into expansion tank. Tank should be correct size. Tank is fi lled with air. As water expands it compresses air in the tank to form air pressure cushion. This “spring-like” cushion serves to maintain correct operating wa...

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...

28 APPENDIX A - CONTROL MODULE A.5 Operation Module continuously monitors boiler water temperature and fi res or shuts off burner based on this temperature data. 1. When “Call for Heat” occurs, control enables circulator and monitors boiler water temperature to determine whether thermostat can be sa...

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...

31 APPENDIX A - CONTROL MODULE — If fl ame rod or bracket is bent out of position, restore to correct position. 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 electri...