P
AGE
20
I
NSTALLATION
(C
ONT
.)
Manifold Pressure:
•
Check the pressure of the gas downstream of the valve by removing the manifold pressure tap with a
3/16" allen wrench (1/8" N.P.T. plug). If the manifold pressure does not match the pressure listed in
the table below on HI, check the inlet gas pressure and correct the problem.
Manifold Pressure with Regulator on HI
Natural Gas
3.5" W.C.
Propane
11" W.C.
Gas Control Valve
The heater must be turned off while connecting or disconnecting the
plug or pressure sensing device. Gas will ignite through the pressure
tap hole if the heater is on and the pressure tap hole is open!
WARNING:
3/16" Allen
Remove the 1/8" N.P.T. plug located on the
right side of the valve (using a 3/16" allen
wrench) and attach a pressure-sensing
device (magnehelic or manometer) to
measure the manifold pressure (use a 1/8"
N.P.T. to flexible tube fitting). Use thread
sealant when replacing the plug.
PILOT ADJ
VENT
T
O
L
PI
ON
OFF
HI
LO
Gas Inlet Pressure:
Minimum Input Pressure
Natural Gas
7" W.C.
Propane
11" W.C.
•
If the pressure is not sufficient, make sure the piping used is large enough, the supply regulator is
adequately adjusted, and the total gas load for the residence does not exceed the amount supplied.
•
The supply regulator (the regulator that attaches directly to the residence inlet or to the propane tank)
should supply gas at the suggested input pressure listed above. Contact the local gas supplier if the
regulator is at an improper pressure.
