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P-1249 Low Pressure Gas Valve Switch
Installation Instructions - EX boilers
Warning
This replacement kit shall be installed by a qualified service agent in accordance with these
instructions and all applicable codes and requirements of the authority having jurisdiction. If the
information in these instructions is not followed exactly, a fire, an explosion or production of
carbon monoxide may result causing property damage, personal injury or loss of life.
The qualified service agency is responsible for the proper installation of this kit. The installation
is not proper and complete until the operation of the converted appliance is checked as specified
in these instructions.
Part #
180-277
When to Install the P-1249 Low Pressure Gas Valve Switch
Replacement Kit
Install the P-1249 kit if you need to replace a faulty low pressure gas valve switch or o-ring on an EX series
boiler.
The switch is designed to protect the boiler from firing with a gas pressure below 4" W.C. (0.15 psi).
• If the switch trips, reset it and measure the inlet gas pressure during full-fire operation. If other appliances
share the gas supply run them also for this test.
• If the switch is exposed to gas piping test pressures, or pressure above 7 psi, it should be replaced.
Note
The P-1249 low pressure gas valve switch is indicated by GML-A2-4-
4 printed on the yellow indicator.
IBC Technologies Inc.
120-405E0
December 29, 2022
Low Gas Pressure Switch - EX series
Description
Gas valve low pressure switch
Released Document
Quantity
1
|
1-844-432-8422
www.ibcboiler.com
1 of 3
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Summary of Contents for IBC P-1249
- Page 1 When to Install the P-1249 Low Pressure Gas Valve Switch Replacement Kit Install the P-1249 kit if you need to replace a faulty low pressure gas valve switch or o-ring on an EX series boiler. The switch is designed to protect the boiler from firing with a gas pressure below 4" W.C. (0.15 psi).
- Page 2 5. Remove the front panel and set aside. Replacing the low pressure gas valve switch and o-ring 1. Remove the plastic cover from the switch. 2. Disconnect the orange, brown, and green wires from the old switch. IBC Technologies Inc. 1-844-432-8422 www.ibcboiler.com Released Document...
- Page 3 3. Restore the call(s) for heat. 4. Perform a leak test on all reinstalled components. 5. Check for functionality of boiler. 6. Perform a combustion analysis. 7. Install front panel. IBC Technologies Inc. 1-844-432-8422 www.ibcboiler.com Released Document 120-405E0 December 29, 2022...
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