Owner`s manual

21
NATURAL GAS
MANUAL PRESSURE MILLIVOLT PRESSURE
Regulator pressure reading: 3.5" w.c. Outlet pressure reading:
(Flame adjustment on high)
3.5" w.c.
Gas inlet pressure: Max. 10.5
" w.c.
Min. 5
" w.c.
Inlet pressure reading Max. 10.5" w.c.
Min. 5" w.c.
L.P. GAS
MANUAL PRESSURE MILLIVOLT PRESSURE
Regulator pressure reading: 10" w.c. Outlet pressure reading:
(Flame adjustment on high)
10" w.c.
Gas inlet pressure: Max. 13" w.c.
Min. 11
" w.c.
Inlet pressure reading Max. 13
" w.c.
Min. 11" w.c.
INSTALLATION (Cont.)
IMPORTANT
Check the gas pressure with the unvented gas log set burning and the control set to HIGH.
The gas log set and its main gas valve must be disconnected from the gas-supply piping system
during any pressure testing of that system at test pressures in excess of
1
/
2
psig (3.5 kPa). The
gas log set must be isolated from the gas-supply piping system by closing its equipment shut-
off valve during any pressure testing of the gas-supply piping system at test pressures equal
to or less than
1
/
2
psig (3.5 kPa). This is accomplished by closing the gas-supply line valve.
CHECKING GAS PRESSURE
Remote-capable safety pilot valve (15 series)
(Fig. 21-1)
Check the valve regulator pressure at the pressure
inlet point. Turn the inlet screw counterclockwise 2
or 3 turns and then place the tubing of the pressure
gauge over the pressure inlet point. (The test “inlet”
tap is farthest to the gas-supply inlet.) After taking the
pressure reading, turn the inlet screw clockwise fi rmly
to reseal. Do not over-torque. Check for gas leaks.
The unvented burner system will need to be propped
up to allow access to the pressure inlet and outlet
points on the bottom side of the valve.
Note: Gas pressure should be checked after
connecting the gas and prior to any further
installation.
Manual safety pilot valve
(Fig. 21-2)
The pressure regulator is preset at the factory and
locked to discourage tampering. If the pressure is not
as specifi ed, replace the regulator with the correct
part from the PARTS LIST in this manual. To check
the pressure, remove
1
/
8
" pressure tap screw plug,
located on the side of the regulator body. Install fi tting
and tubing of pressure gauge. With the unit operating,
take the pressure reading. Reinstall the pressure tap
screw and check for leaks when done.
Fig. 21-1
Inlet
Fig. 21-2
Regulator
Pressure tap plug
GAS PRESSURE SPECIFICATIONS
Outlet