3.Carefully remove
4.Skip to Step 9 for
5.Locate and remove
6.Carefully remove the spring & weight.
7.Using an allen wrench, turn clockwise to increase and counterclockwise to decrease the
8.Carefully place the spring & weight back in before replacing
9.For
10.When correct settings are set, replace the sole- noid and tamper screw in place.
1.Turn off gas supply at the appliance service level.
2.Remove the pressure regulator cover assembly.
3.Remove the existing stem/spring assembly.
4.Insert the replacement stem/spring assembly.
5.Replace the pressure regulator cover assembly and tighten screws.
6.Mount conversion labels on the gas valve.
Fig. 30: Gas Valve Adjustment (Invensys Valve)
Gas Type Conversion on Valve
WARNING: Burner orifices must be changed when changing gas type.
NOTE: Model HD401 requires replacement of valve.
Fig. 31: Gas Type Conversion on Honeywell Valve
Safety Inspection
•Replace main gas manifold adjustment screw cap.
•Check all thermostats and high limit settings.
•During the following safety checks leave manome- ters hooked up, check and record.
•If other gas fired equipment are in the room and on same gas main check all pressures on the Hi Delta SS with all other equipment running.
•Check thermostats for ON/OFF operation.
•Check High limits for ON/OFF operation.
•While in operation, check flow switch operation.
•Check the low gas pressure switches (For proper adjustment, if available, use the attached manometers to set pressure. The scales on the switch are approximate only); Low gas pressure switch (optional) must be set at 3.5 in. WC for nat- ural gas and 10.5 in. WC for LP gas.
•High gas pressure switch (optional) at 1 in. WC above manifold pressure.
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