Lennox GSB8-E Installation Instructions Manual
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Lennox GSB8-E Installation Instructions Manual

Gas-fired steam boiler
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PRODUCT LITERATURE
Lennox Industries Inc.
Dallas, Texas
H
INSTALLATION
INSTRUCTIONS
GSB8-E
GAS-FIRED STEAM BOILER
GSB8-S
GAS-FIRED STEAM BOILER
RETAIN THESE INSTRUCTIONS
FOR
FUTURE REFERENCE
These instructions must be
affi xed on or adjacent to the
boiler.
GAS-FIRED HOT WATER BOILERS
These Gas-Fired Water Boilers are low
pressure, sectional cast iron boilers Design
Certified by CSA (Canadian Standards
Association) for use with Natural and
Propane Gases.
They are constructed
and hydrostatically tested for a maximum
working pressure of 50 psi (pounds per
square inch) in accordance with A.S.M.E.
(American Society of Mechanical Engineers)
Boiler and Pressure Vessel Code Section IV:
Rules for Construction of Heating Boilers.
WARNING
WARNING
Improper installation, adjustment,
alteration, service, or maintenance can
cause injury or property damage. Refer
to this manual. For assistance or additional
information consult a qualifi ed installer,
service agency, or the gas supplier.
P/N# 14683453, Rev. A [07/2011]

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  • Page 1 INSTALLATION INSTRUCTIONS PRODUCT LITERATURE Lennox Industries Inc. GSB8-E Dallas, Texas GAS-FIRED STEAM BOILER GSB8-S GAS-FIRED STEAM BOILER RETAIN THESE INSTRUCTIONS FUTURE REFERENCE These instructions must be affi xed on or adjacent to the boiler. GAS-FIRED HOT WATER BOILERS These Gas-Fired Water Boilers are low...

  • Page 2: Table Of Contents

    Checking and Adjusting ....................25 Cleaning Your Boiler ...................... 27 Maintaining Your Boiler ....................28 Service Hints ....................... 30 Repair Parts ......................... 31 KEEP THIS MANUAL NEAR BOILER RETAIN FOR FUTURE REFERENCE GSB8-E GAS-FIRED STEAM BOILER GSB8-S GAS-FIRED STEAM BOILER...

  • Page 3: Safety Symbols

    SAFETY SYMBOLS The following defi ned symbols are used throughout this READ ALL INSTRUCTIONS BEFORE INSTALLING. manual to notify the reader of potential hazards of varying risk levels. WARNING Keep boiler area clear and free from DANGER combustible materials, gasoline and other Indicates a hazardous situation which, if fl...

  • Page 4: Boiler Ratings And Capacities

    BOILER RATINGS AND CAPACITIES Figure 1 - Dimensions BOILER SPECIFICATIONS Natural gas Propane GSB8-075E Electronic 82.7 75,000 62,000 47,000 70,000 58,000 44,000 (18.5) (14.7) (18.2) (16.1) (13.0) (17.0) (12.7) (147) (22.0) (20.0) GSB8-075S Standing Pilot 81.1 GSB8-112E Electronic 80.4 112,500 91,000 68,000 105,000...

  • Page 5: Before You Start

    BEFORE YOU START Net I=B=R steam Ratings shown are based on piping and Boilers are designed for use in closed heating systems pickup allowance of 1.333. where all steam is returned to boiler as condensate and amount of make-up water required is minimal. Boilers are Base selection of boiler size on "Net I=B=R Rating"...

  • Page 6: Fresh Air For Combustion

    FRESH AIR FOR COMBUSTION Volume ≥ 50 ft x Total Input [Mbh] WARNING Known Air Infi ltration Rate. See Table 1 for Air openings to combustion area must not space with boiler only. Use equation for multiple be obstructed. Following instructions below, appliances.

  • Page 7: Installation - System Piping

    INSTALLATION - SYSTEM PIPING • Use pipe suitable for temperatures of 375°F (191°C) WARNING or greater. Burn and scald hazard. Safety valve could • Individual boiler discharge piping shall be discharge steam or hot water during independent of other discharge piping. operation.
  • Page 8 INSTALLATION - SYSTEM PIPING Recommended near boiler piping for gravity return System takeoffs from the header must never be bull- systems is shown in Figure 5. This confi guration uses headed. If the steam main goes in two directions, there one supply and one return tapping.
  • Page 9 INSTALLATION - SYSTEM PIPING For gravity return systems, the bottom of the lowest Figure 4 - Chilled Water Piping 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.

  • Page 10: Chimney And Vent Pipe Connection

    CHIMNEY AND VENT PIPE CONNECTION For boilers for connection to gas vents or chimneys, vent End of vent pipe must be fl ush with inside face of installations shall be in accordance with National Fuel chimney fl ue. Use a sealed-in thimble for the chimney Gas Code, ANSI Z223.1/NFPA 54, or "Venting Systems connection.

  • Page 11: Vent Damper Operation

    CHIMNEY AND VENT PIPE CONNECTION After it has been determined that each appliance Figure 5 - Typical Masonry Chimney Requirements 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.

  • Page 12: Gas Supply Piping

    VENT DAMPER OPERATION For safe, effi cient operation, the vent damper and all DO NOT turn damper open manually or motor fl ue product carrying areas of the appliance must be damage will result. Set switch to “AUTOMATIC checked annually by you, with particular attention OPERATION”...
  • Page 13 GAS SUPPLY PIPING • Provide sediment trap up stream of gas valve. Figure 9 - Gas Piping At Boiler 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 operation.

  • Page 14: Electrical Wiring

    ELECTRICAL WIRING ELECTRIC POWER SUPPLY Set heat anticipator at 0.4 amps for boilers equipped Electrically bond boiler to ground in accordance with with standing pilot, and at 0.6 amps for boilers equipped requirements of authority having jurisdiction. Refer to: with intermittent ignition. Connect 24 volt thermostat •...
  • Page 15 ELECTRICAL WIRING Figure 10A - Isolation Relay Wiring For Steam Figure 10B - Isolation Relay Wiring For Steam Boilers With Float Type Low Water Cut Off And Using Boilers With Probe Type Low Water Cut Off And An Electronic Thermostat Using An Electronic Thermostat...
  • Page 16 ELECTRICAL WIRING Figure 11 - Wiring Diagrams For Boilers With PS-802 Probe Type Low Water Cut-Off INTERMITTENT IGNITION 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.
  • Page 17 ELECTRICAL WIRING Figure 12 - Wiring Diagrams For Boilers With PS-802 Probe Type Low Water Cut-Off STANDING PILOT 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.
  • Page 18 ELECTRICAL WIRING Figure 13 - Wiring Diagrams For Boilers With 67D-1 Float Type Low Water Cut-Off INTERMITTENT IGNITION 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.
  • Page 19 ELECTRICAL WIRING Figure 14 - Wiring Diagrams For Boilers With 67D-1 Float Type Low Water Cut-Off STANDING PILOT 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.

  • Page 20: Controls And Accessories

    CONTROLS AND ACCESSORIES SAFETY VALVE LOW WATER CUT-OFF 1. Model 67D-1 The safety valve should open automatically if the boiler steam pressure exceeds the pressure rating of the valve This is a fl oat operated switch which shuts down the gas (15 psig).
  • Page 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 causing products of combustion to spill out of the relief opening, the spill switch disc heats up and the spill switch contacts will...

  • Page 22: Operating Instructions

    OPERATING INSTRUCTIONS For Your Safety Read Before Operating Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or WARNING turn by hand, don’t try to repair it, call a qualifi ed ser- vice technician.

  • Page 23: Continuous Pilot Boiler - Vr8200A/Vr8300A Gas Valve Operating Instructions

    CONTINUOUS PILOT BOILER - VR8200A/VR8300A GAS VALVE OPERATING INSTRUCTIONS STOP! Read the safety information on page 22. Figure 15 - Lighting Pilot Set the thermostat to lowest setting. Turn off all electric power to the appliance. Remove lower front panel. Rotate gas control knob slightly and turn clockwise to “OFF”...

  • Page 24: Operating Instructions

    OPERATING YOUR BURNER HOW A STEAM SYSTEM OPERATES THERMOSTAT The water in the boiler is heated until it reaches the boil- Keep it set at a desired room temperature. If windows ing point. As the water boils it turns into steam. The steam are to be opened or heat is not needed, move thermostat rises from the top of the water through the supply main to pointer to a lower setting.

  • Page 25: Checking And Adjusting

    CHECKING AND ADJUSTING ADJUST PILOT BURNER ADJUST STEAM PRESSURE CONTROL Pilot fl ame should surround 3/8” to 1/2” of the pilot sensor. The steam pressure limit control (pressuretrol) shuts off the gas to the main burners when the steam pressure in Refer to Fig.
  • Page 26 CHECKING AND ADJUSTING If your boiler is equipped with the optional WF-2U-24 Figure 19 - Igniter water feeder, continue to keep the thermostat calling for heat after the low water cut off recognizes the low water condition. After a one minute time delay, the water feeder should start feeding water to the boiler.

  • Page 27: Cleaning Your Boiler

    CLEANING YOUR BOILER It is very important to clean a new steam boiler after it has Now, let the boiler steam for a few days, to give the majority been installed and put into continuous operation. This must of the system dirt a chance to work its way back to the be done to remove any accumulation of oil, grease, sludge, boiler.

  • Page 28: Maintaining Your Boiler

    MAINTAINING YOUR BOILER Keep boiler area clear and free from combustible materials, NOTE: Opening blow-off valve checks cut-off operation gasoline and other fl ammable vapors and liquids. Keep too. As fl oat drops with falling water level, burners will shut boiler are clear and free of obstructions to fl...
  • Page 29 MAINTAINING YOUR BOILER FOAMING, PRIMING OR SURGING BOILER WATER TREATMENT (Other Than Cleaners) In steam systems where the system is tight, free from leaks, These terms are used to describe a fl uctuating water line - and all the steam is returned to the boiler as condensate, when water leaves the boiler with the steam.

  • Page 30: Service Hints

    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.

  • Page 31: Repair Parts

    REPAIR PARTS...
  • Page 32 REPAIR PARTS...
  • Page 33 REPAIR PARTS...
  • Page 34 REPAIR PARTS...
  • Page 36 PRODUCT LITERATURE Lennox Industries Inc. Dallas, Texas...

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