Operating instructions
PROCEDURE 12—SPILL SWITCH (BLOCKED VENT SHUTOFF SYSTEM)
The spill switch is a manual-reset disc thermostat with a fixed set point (340°F) and normally closed contacts. It is located at relief opening of
integral draft diverter. In the event of chimney or venting system blockage causing products of combustion to spill out of relief opening, the spill
switch disc heats up and spill switch contacts open shutting down flow of gas to main burners by removing power to gas valve.
In the event that the spill switch contacts open, reset button on back of switch pops up. The spill switch must be reset manually after switch has
cooled off by pushing reset button down. Check venting system and chimney for blockage when restoring system to operating condition. DO NOT
operate system without a spill switch.
STARTING BOILER
PROCEDURE 1—HOW A HOT WATER SYSTEM OPERATES
The entire heating system (boiler, piping, and radiation units) is filled with water. As water in boiler is heated, it is pumped from top of boiler
through supply main to radiation units. The cooler water in them flows back through return main to boiler. This provides positive and rapid
response to thermostat.
PROCEDURE 2—FILLING SYSTEM WITH WATER
To fill:
1. Close air vents on all radiation units. Open valves to these units.
2. Make sure boiler and expansion tank drain cocks are closed. The air bleed screw on tank drain fitting should be closed.
3. Open valve in line from boiler to expansion tank. Refer to Maintaining Boiler section for additional information.
4. Open water inlet to boiler and leave it open.
5. Start with the LOWEST radiation unit. Open the air vent on this radiation unit. When all air has escaped and water starts to flow from vent,
close air vent.
6. Proceed to next lowest radiation unit and repeat process outlined in item 5. Repeat until every radiation unit in system has been covered.
End with the highest unit in system.
If units have automatic vents, this manual venting is unnecessary but speeds up proper filling of system.
If system is a closed expansion tank system, there may be an automatic fill valve. It may be left open to refill system automatically as needed.
Check temperature-pressure gauge. Note position of hand indicating pressure. This should be between 10 and 15 lb. Any lowering of this movable
hand below 10 lb indicates loss of water due to leakage. The automatic fill valve should compensate for this. Instructions are packaged with valve.
CAUTION: Never run water into a hot, empty boiler or thermal shock may crack boiler components (sections).
FOR YOUR SAFETY READ BEFORE OPERATING
WARNING:
If you do not follow these instructions exactly, a fire or explosion may result causing property damage,
personal injury, or death.
A. Some boilers are equipped with an intermittent ignition device which automatically lights the pilot. Do NOT try to light pilot by hand.
Some boilers are equipped with a continuous pilot and must be lit manually. See lighting instructions in Continuous Pilot Boiler section. A match
holder is included in parts bag.
B. BEFORE OPERATING, smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air
and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric 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.
C. Use only your hand to turn gas control knob. Never use tools. If knob will not turn by hand, do not try to repair it. Call a qualified service
technician. Force or attempted repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace
any part of control system and any gas control which has been under water.
GAS VALVE OPERATING INSTRUCTIONS
PROCEDURE 1—INTERMITTENT IGNITION BOILER—VR8204A/VR8304M GAS VALVE
A. To Turn On Gas To Appliance
1. STOP! Read safety information in "For Your Safety Read Before Operating" section.
2. Set thermostat to lowest setting.
3. Turn off all electrical power to appliance.
4. This appliance is equipped with an ignition device which automatically lights the pilot. Do NOT try to light pilot by hand.
5. Remove lower front panel.
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