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User's Information Manual
Hazard definitions
Hazards that will cause severe personal injury,
death or substantial property damage.
Hazards that can cause severe personal injury,
death or substantial property damage.
Hazards that will or can cause minor personal in-
jury or property damage.
Special instructions on installation, operation or
maintenance that are important but not related to
personal injury or property damage.
The Boiler manual is for use only by a qualified
heating installer/service technician. Refer only to
this User's Information Manual for your reference.
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury (exposure to hazardous
materials) or loss of life. Installation and service
must be performed by a qualified installer, service
agency or the gas supplier (who must read and
follow the supplied instructions before installing,
servicing, or removing this boiler. This boiler
contains materials that have been identified as
carcinogenic, or possibly carcinogenic, to humans).
Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
•
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
the gas supplier's instructions.
•
If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service
technician or the gas supplier.
If the information in this manual is not followed exactly, a fire or
explosion may result, causing property damage, personal injury or
loss of life.
WHAT TO DO IF YOU SMELL GAS
G G G G G W
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W A A A A A
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G G G G G WI G
WI G
WI G
WI G W
WI G
Gas-Fired Water Boilers
Propane gas odorant
Propane boilers only — Your propane supplier
mixes an odorant with the propane to make its pres-
ence detectable. In some instances, the odorant
can fade and the gas may no longer have an odor.
•
Propane gas can accumulate at floor level. Smell near the
floor for the gas odorant or any unusual odor. If you suspect a
leak, do not attempt to light the pilot.
•
Use caution when attempting to light the propane pilot. This
should be done by a qualified service technician, particularly
if pilot outages are common.
•
Periodically check the odorant level of your gas.
•
Inspect boiler and system at least yearly to make sure all gas
piping is leak-tight.
•
Consult your propane supplier regarding installation of a gas
leak detector. There are some products on the market intended
for this purpose. Your supplier may be able to suggest an
appropriate device.
INSTALLER — Please take time to review this
User's Information Manual with the boiler owner.
Explain all maintenance and service procedures
and the correct "Lighting or Operating Instruc-
tions".
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W S S S S S
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Part Number 550-110-726/0703
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Table of Contents
Summary of Contents for Union Steam GWA
- Page 1 G G G G G W W A A A A A G G G G G WI G WI G WI G W S S S S S WI G W WI G Gas-Fired Water Boilers User’s Information Manual Hazard definitions Propane gas odorant Propane boilers only —...
- Page 2 Chlorine-based swimming pool chemicals Should the boiler shut down due to blockage, the GWI device will automatically reset, but the GWA device must be reset or Calcium chloride used for thawing replaced only by a qualified installer/service technician.
- Page 3 To locate Lighting or Operating Instructions: Find your boiler model number on boiler nameplate (begins with GWA, GWI or GWS). GWA model number will include a suffix indicating pilot ignition — “S” for standing pilot or “I” for spark-ignited pilot. Read the valve manufacturer’s model and name on the boiler gas valve.
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Page 4: Lighting Instructions
GW A/GWI/GWS Gas-Fired Water Boilers – User’s Information Manual Lighting Instructions GWA — Standing pilot Gas valve — Honeywell VR8200/VR8300 FOR YOUR SAFETY READ BEFORE LIGHTING If you do not follow these instructions exactly, a fire or explosion may result caus- ing property damage, personal injury or loss of life. - Page 5 GW A/GWI/GWS Gas-Fired Water Boilers – User’s Information Manual Lighting Instructions GWA — Standing pilot Gas valve — Robertshaw 7200 FOR YOUR SAFETY READ BEFORE LIGHTING If you do not follow these instructions exactly, a fire or explosion may result caus- ing property damage, personal injury or loss of life.
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Page 6: For Your Safety Read Before Operating
OPERATING INSTRUCTIONS 1. Stop! Read the safety information above on this label. Vent damper operations below apply only to GWA boilers. Find vent damper manufacturer and model on vent damper nameplate. 2. Set the thermostat to lowest setting. 3. When equipped with Effikal vent damper Model RVGP, place service switch in Hold Damper Open position. - Page 7 GW A/GWI/GWS Gas-Fired Water Boilers – User’s Information Manual Operating Instructions GWA — Spark-ignited pilot Gas valve — Robertshaw 7200 FOR YOUR SAFETY READ BEFORE OPERATING If you do not follow these instructions exactly, a fire or explosion may result caus- ing property damage, personal injury or loss of life.
- Page 8 GW A/GWI/GWS Gas-Fired Water Boilers – User’s Information Manual Operating instructions GWI and GWS All gas valves FOR YOUR SAFETY READ BEFORE OPERATING If you do not follow these instructions exactly, a fire or explosion may result caus- ing property damage, personal injury or loss of life. A.
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Page 9: Maintenance Procedures
❏ Component information Rollout thermal fuse element Spill switch (GWA only) The Rollout TFE is located above the The Spill switch is attached to the draft burners. It cuts off gas flow should flame hood. - Page 10 2. Inner cone engulfing thermocouple (standing pilot) or pilot flame sensor (spark-ignited pilot). 2. GWA boilers — Check vent system operation: 3. Thermocouple or pilot flame sensor glowing cherry red. a. With boiler firing, hold a candle or match below lower edge of draft hood “skirt.”...
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Page 11: Every 6 Months
GW A/GWI/GWS Gas-Fired Water Boilers – User’s Information Manual ❏ Check monthly ❏ Every 6 months Main burner flame Operate boiler relief To avoid water damage or scalding due to valve Proper main burner flame (see below): operation, a metal discharge line must be connected 1. - Page 12 GW A/GWI/GWS Gas-Fired Water Boilers – User’s Information Manual ❏ Troubleshooting Troubleshooting — Common problems and possible solutions Symptom Common Causes Possible Corrections Rapid cycling — Thermostat installed where Locate thermostat on inner wall away from heat sources or cool drafts. drafts or heat affect reading boiler turns on and off frequently...