Lennox GSB8-S - Manual

5 Net I=B=R steam Ratings shown are based on piping and pickup allowance of 1.333.Base selection of boiler size on "Net I=B=R Rating" being equal to or greater than installed radiation in square feet. Consult manufacturer before selecting a boiler for installations having unusual piping and ...

6 FRESH AIR FOR COMBUSTION ! WARNING Air openings to combustion area must not be obstructed. Following instructions below, adequate combustion air can be maintained. Provide combustion air and ventilation air in accordance with the section “Air for Combustion and Ventilation,” of the National Fuel G...

7 INSTALLATION - SYSTEM PIPING Near boiler piping, that is the piping around boiler, must be considered as part of boiler for proper water level control, and to produce dry steam. Correct near boiler piping is crucial to the proper operation of the boiler and the heating system. Follow these recomme...

8 INSTALLATION - SYSTEM PIPING Recommended near boiler piping for gravity return 4. systems is shown in Figure 5. This con fi guration uses one supply and one return tapping. This setup can be used on any size boiler in this series. The supply and return connections may be piped both into the same s...

9 INSTALLATION - SYSTEM PIPING For gravity return systems, the bottom of the lowest 13. steam carrying pipe, be it a dry return, or the end of the steam main, must be at least 28” above the normal water level line on the right side of the boiler. This is known as “Dimension A.”For pumped return syst...

10 CHIMNEY AND VENT PIPE CONNECTION For boilers for connection to gas vents or chimneys, vent installations shall be in accordance with 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 B...

11 After it has been determined that each appliance 6. remaining connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fi replace dampers and any other gas-burning appliance to their previous conditions of use.Any improper operation...

12 For safe, ef fi cient operation, the vent damper and all fl ue product carrying areas of the appliance must be checked annually by you, with particular attention given to deterioration from corrosion or other sources. If you see corrosion or other deterioration, contact your heating contractor fo...

13 Provide sediment trap up stream of gas valve. • Propane Installation Connections by licensed propane dealer only. • Use two stage regulator provided by propane • supplier.Propane supplier should check piping. • Leak Check Gas Piping Pressure test boiler and gas connection before placing boiler in...

14 ELECTRICAL WIRING ELECTRIC POWER SUPPLY 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 Installation...

16 ELECTRICAL WIRING If any of the original wire as supplied with this appliance must be replaced, it must be replaced with type 105°C Thermoplastic wire or its equivalent. Figure 11 - Wiring Diagrams For Boilers With PS-802 Probe Type Low Water Cut-Off INTERMITTENT IGNITION

17 ELECTRICAL WIRING If any of the original wire as supplied with this appliance must be replaced, it must be replaced with type 105°C Thermoplastic wire or its equivalent. Figure 12 - Wiring Diagrams For Boilers With PS-802 Probe Type Low Water Cut-Off STANDING PILOT

20 CONTROLS AND ACCESSORIES SAFETY VALVE The safety valve should open automatically if the boiler steam pressure exceeds the pressure rating of the valve (15 psig). Should it ever fail to open under this condition, shut down your boiler. If valve discharge occurs, or valve fails to open as described...

21 CONTROLS AND ACCESSORIES SPILL SWITCH(BLOCKED VENT SAFETY SHUTOFF) The spill switch is a manual reset disc thermostat with a fi xed setpoint (280° F), and normally closed contacts. It is located at the relief opening of the draft diverter. In the event of chimney or venting system blockage causin...

22 OPERATING INSTRUCTIONS For Your Safety Read Before Operating ! 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. Some boilers are equipped with an intermittent ignition A. device which automatically l...

24 OPERATING YOUR BURNER HOW A STEAM SYSTEM OPERATES The water in the boiler is heated until it reaches the boil- ing point. As the water boils it turns into steam. The steam rises from the top of the water through the supply main to the radiation units. As it passes through the radiators it re- lea...

25 CHECKING AND ADJUSTING ADJUST PILOT BURNER Pilot fl ame should surround 3/8” to 1/2” of the pilot sensor. Refer to Fig. 19. If fl ame needs adjusting, do it as follows: Remove screw cover over pilot adjusting screw. 1. Insert small screwdriver and adjust fl ame as needed. 2. Turn screw counterclo...

27 It is very important to clean a new steam boiler after it has been installed and put into continuous operation. This must be done to remove any accumulation of oil, grease, sludge, etc., that may have been present in the system. These substances may cause the boiler water to foam and surge, thus ...

28 MAINTAINING YOUR BOILER Keep boiler area clear and free from combustible materials, gasoline and other fl ammable vapors and liquids. Keep boiler are clear and free of obstructions to fl ow of combustion and ventilation air.Check the water level every day or two. Verify the water line shown by op...

29 FOAMING, PRIMING OR SURGING These terms are used to describe a fl uctuating water line - when water leaves the boiler with the steam.It is caused by any combination of the following: Threading oil and organic matter in the boiler water. 1. (Mineral oil, or core sand does not cause surging.) Follo...

30 SERVICE HINTS You may avoid inconvenience and service calls by checking these points before you call for service. FOR YOUR SAFETY WHAT TO DO IF YOU SMELL GAS 1. Do Not try to light any appliance.2. Do not touch any electric switch, do not use the phone. 3. Leave the building immediately, then cal...