Impinger 3270 Service Manual – Dom & Int’l
20
BURNER CONTROL GAS VALVE (DUAL VALVE) – REPLACEMENT – DOMESTIC ONLY
WITH POWER OFF:
A. Remove appropriate control box cover.
B. Remove incoming gas line.
C. Remove screws from incoming nipple mounting bracket.
D. Remove incoming nipple.
E. Remove bypass tube assembly.
F. Disconnect pipe union.
G. Disconnect wiring from control valve (four [4] push-on connectors). Disconnect wiring from modulating
valve (2 wires) making note of wire numbers and location for reinstallation.
H. Remove both valves. Replace control valve (valves are connected by a ½ inch pipe nipple).
I. Reassemble in reverse order and check system operation. Set manifold pressure on gas valve. Pressure
should be 3.5 in. W.C. Nat., 10 in. W.C. L.P. on a cool oven heating up on full flame.
NOTE: INLET GAS PRESSURE MUST BE A MINIMUM OF 7 IN. W.C. NATURAL AND 11 IN. W.C. L.P.
After installation, check all gas line fittings for leaks.
FRONT VIEW
MANIFOLD ADJUSTMENT
SCREW LOCATED UNDER
COVER SCREW
TOP VIEW
PILOT
LINE
CONNECTION
MANIFOLD PRESSURE
ADJUSTMENT CONNECTION
MANIFOLD ADJUSTMENT
SCREW LOCATED UNDER
COVER SCREW
IGNITION CONTROL GAS VALVE (DUAL VALVE) – REPLACEMENT – INTERNATIONAL ONLY
WITH POWER OFF:
A. Remove appropriate control box cover.
B. Remove incoming gas line.
C. Remove screws from incoming nipple mounting bracket.
D. Remove incoming nipple.
E. Remove wiring from ignition control (mounted on gas valve). Mark all wiring for reassembly.
F. Remove gas valve and piping assembly.
G. Remove piping from gas valve.
H. Reassemble in reverse order and check system operation. Set manifold pressure on gas valve. Pressure
should be 3.5 in. W.C. Nat., 10 in. W.C. L.P. on a cool oven heating up on full flame.
NOTE: INLET GAS PRESSURE MUST BE A MINIMUM OF 7 IN. W.C. NATURAL AND 11 IN. W.C. L.P.
After installation, check all gas line fittings for leaks.
