GBT A2-035, Installation & Operating Instructions Manual

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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 the gas supplier’s instructions.
•
If you cannot reach your gas supplier, call the fire department.
3. Turn on electrical power to the heater/boiler. Using a multi-meter, check voltage between the HOT and
COMMON (should be about 120 Volts).
4. Check voltage between the HOT and Ground (should be about 120 Volts).
5. Check voltage between the COMMON and Ground (should be less than 1 Volt).
If the COMMON – Ground is more than 1 Volt, STOP! Contact a licensed electrician to
correct the ground fault.
6. Turn OFF electrical power to the heater/boiler.
7. Attach 24 inch manometers to the gas line so that the gas pressure can be measured upstream of the
first heater/boiler automatic gas valve, downstream of the last automatic gas valve, and between
automatic gas valves.
NOTE: Depending upon the model, your heater/boiler may be equipped
with one or two automatic gas valves.
8. Install water temperature measurement thermometers in the water inlet and outlet piping.
9. Slowly turn on the manual gas shut off valve upstream of the heater/boiler.
10. Read the gas supply pressure using the manometer. Verify that the supply gas supply pressure is
between the minimum and maximum per the table below. If the pressure is not within these limits,
check to see if a service gas regulator is installed and adjust accordingly.
Maximum Pressure Minimum Pressure
Natural Gas
9 5
Propane 15 13
Units: Inches of Water
Do not operate heater/boiler if the gas supply pressure is not within the limits shown
in the table above.
11. Turn OFF the manual gas shut off valve upstream of the heater/boiler.
12. Turn ON electrical power to the heater/boiler ON.
13. Turn the operating thermostat to a setting high enough to turn on the water pump. Verify water is
flowing though the heater/boiler by verifying the flow switch has closed.
Manual Gas Shut-Off Valve, All Other
Models
A2-(H,B) 035/050 Main Regulating Gas Valve