Rev. 10/19/11
7
Procedures For Qualified Technicians:
Test Voltage to Gas Valve:
•
Using a multi-meter, set the test leads to VDC.
•
Insert each test lead wire into the 2-pin connector on the gas
valve marked
MAIN
(green and white wires). (See Fig 10).
•
Using the remote, turn unit on, immediately you should
see 6 VDC and then drop to 1.5 VDC. Follow the same
procedure with the 2-pin connector on gas valve marked
PILOT (orange and white wires). (See Fig. 7).
•
If you do not get the 6 VDC volts, from the
MAIN
and
PILOT
,
the module should be replaced.
Test Resistance of the Burner Coil at Gas Valve:
This tests whether valve can open or close.
•
Using a multi-meter, set the test leads to VDC.
•
Remove the green/white 2-pin connector labeled
MAIN
from the gas
valve.
•
Touch one lead from the volt meter to each pin on the valve. (See Fig. 8).
•
Coil resistance should read 990 Ohms to 1230 Ohms.
•
If resistance falls outside of these limits, the gas valve should be replaced.
Test Static and Operating Line Pressure
:
Check static and operating line pressure, (should not see more than 2” water
column difference between static and operating). Static pressure is the gas pressure coming to the gas valve before the
valve is in operation.
Static Pressure
: Natural Gas = 7.0” - 12.0” - WC. & LP Gas 11.0” - 14.0”WC.
Operating Pressure
: Natural Gas = 4.7” WC. & LP = 10-14” WC.
Fig. 7
Fig. 8
f i r e - p a r t s . c o m
