ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUAL
GAS VALVE
The outlet of the gas valve is connected by flange directly to the side of the Venturi (page 14). There is no manifold gas line on the water heater. A gas orifice with gasket is fitted into the gas valve’s outlet flange. See the images below.
Gas Valve Removal
The gas valve must be removed to inspect the gas orifice. There are 3 - 5/32” hex head screws that secure the gas valve to the Venturi. Long T handle hex wrenches
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| 24 VAC Gas Valve |
5/32” hex wrench |
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Venturi |
Gas Orifice 24 VAC Gas Valve |
& Gasket |
Venturi |
Gas Orifice
& Gasket
GAS VALVE REMOVAL PROCEDURE
1Ensure power to the water heater is turned off.
2Turn off the supply gas shut off valve.
3Disconnect supply gas line to water heater.
4Remove 3 gas valve mounting screws - 5/32” hex head machine screws. Support gas valve body when removing last screw. Long T handle hex wrenches
5Carefully lift gas valve body off of flange connection on Venturi.
6Gas orifice and gasket are now accessible.
Natural Gas Orifice | 0.191” |
Propane Gas Orifice | 0.162” |
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Gasket | Orifice |
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Technical Literature Department | 15 of 52 | Ashland City, TN © 2008 |
Servicing should only be performed by a Qualified Service Agent |
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