8.Remove burner assembly from housing, the main and pilot orifice, flame target, pilot shield (main and extension), burner ignitor can now be changed or serviced as needed.
9.Reassemble in reverse order. Check all gas line fittings for leaks.
GAS CONTROL VALVE – REPLACEMENT (S/N N31348 and Below)
1.Shut off power at main breaker.
2.Shut off gas supply.
3.Remove control panel top and front cover.
4.Remove the four screws from the incoming nipple mounting bracket and remove pipe.
5.Disconnect two plugs from gas control valve and mark locations.
6.Remove pilot tube assembly from gas control valve.
7.Disconnect pipe union just above temperature regulation valve.
8.Remove piping from old valve for installation on new valve.
9.Reassemble in reverse order. Check all gas line fittings for leaks. After assembling, check for proper adjustment of gas pressure switch, 10 on dial for natural gas, 27 for LP gas or 4.5 for town gas.
10.Check and adjust manifold pressure. Remove pressure tap located in gas piping and install manometer. Adjustment screw is located on the front of the valve, adjust as needed. 2.5” W.C. for natural gas, 10” for LP or 2.0” W.C. for town gas.
11.Check filter by removing cover plate (located on either side of valve). Remove four screws and slide filter out of valve and inspect. Reassemble in reverse order and check for leaks.
GAS CONTROL VALVE – REPLACEMENT (S/N N31349 and Above)
1.Shut off power at main breaker.
2.Shut off gas supply.
3.Remove control panel top and front cover.
4.Disconnect the gas piping from the back of the unit.
5.Remove the mounting screw from the incoming pipe nipple and remove the incoming piping nipple.
6.Remove pilot tube assembly from gas valve.
7.Disconnect wiring from gas valve. Mark all wiring for reassembly.
8.Disconnect pipe union and remove gas valve.
9.Remove piping from old valve and reassemble in reverse order.
10.Check system for proper operation. Check all gas line fittings for leaks.
11.Adjust the gas manifold pressure on the gas valve. Refer to the specification plate on the oven for proper rating.
TEMPERATURE REGULATION VALVE - REPLACEMENT
1.Shut off power at main breaker.
2.Shut off gas supply.
3.Remove control panel top and front cover.
4.Remove gas control valve (See "GAS CONTROL VALVE")
5.Disconnect wires from temperature regulation valve.
6.Remove two (2) hex nuts that hold main orifice bracket in place.
7.Remove temperature regulation valve assembly.
8.Remove piping from temperature regulation valve.
9.Reassemble in reverse order.
10.Check all fittings for leaks.
SWITCH, BURNER RESET – REPLACEMENT
1.Shut off power at main breaker.
2.Remove control box cover and front panel.
3.Disconnect reset switch wires from burner control and mark for reassembly.
4.Pull off black button from switch and remove mounting nut. Remove switch from control box.
5.Reassemble in reverse order and check system operation.
14 | Impinger I – Adv Digital – Gas Service Manual – International |
