Aqua-Hot 400 Series Service Manual page 61

Be sure to turn OFF the Propane Gas Supply, at the port on top of the Aqua-Hot prior to beginning this
Dual Stage Propane Gas Valve (continued)
The Aqua-Hot operates o both AC and DC power. Be sure to
disconnect the 120 Volt-AC power supply from the Aqua-Hot
prior to servicing. Failure to do so could result in serious
personal injury, electrical shock, or even death!
Replacement Procedure:
1. Shut off the propane gas supply, by turning the propane
inlet port ball valve to the OFF position.
2. Using an 11/16 wrench, remove the propane supply
line from the Dual Stage Propane Gas Valve.
3. Disconnect the wires from the propane gas valve. Be
sure to note the location of the wires.
4. Using a 1/2" Wrench, loosen and remove the dual stage
propane gas valve from the propane burner.
NOTE: It may be necessary to use a back up wrench to pre-
vent damage to the propane burner, when removing the
dual stage gas valve.
5. Remove and clean the steel fittings on the defective
dual stage gas valve, to use on the replacement dual
stage gas valve.
6. Wrap the threads of the steel fittings with a thread seal-
ant recommended for use with propane gas fittings.
7. Install the steel fittings onto the dual stage gas valve, as
they were previously removed.
8. Connect the dual stage gas valve to the propane burner.
9. Connect the propane supply line to the dual stage gas
valve.
10. Reconnect the wires previously disconnected. Refer to
the wiring schematic in Appendix A, for proper wire loca-
tion.
11. Turn the Propane inlet port ball valve to the ON position.
12. Test for propane leaks.
13. Test for proper operation.
replacement procedure.
Figure 57
Figure 58
Dual Stage Propane Gas Valve
© Aqua-Hot® AHE-400-P01 Service Manual Rev.B June 2014
Section #: Title
Propane-Burner Components
Propane inlet port
ball valve
p.
61