6
1. Refer to Fig. 10.
2. Be sure gas and electrical supplies to furnace are off.
3. Remove caps that conceal adjustment screws for the gas--
valve regulators. (See Fig. 10.)
4. Remove the regulator adjustment screw.
5. Remove the regulator springs (silver).
6. Install the propane gas regulator springs (white).
7. Install the regulator adjustment screws.
8. Turn the adjusting screw clockwise (in) 8.5 full turns. This
will increase the manifold pressure closer to the propane
set point. (See Fig. 10.)
9. Do not install regulator seal caps at this time.
ON/OFF Switch
Regulator Seal Cap
Regulator Adjustment under
Regulator Seal Cap
1/2” NPT Outlet
1/8” NPT Manifold
Pressure Tap
1/8” NPT Inlet
Pressure Tap
1/2” NPT Inlet
SINGLE-STAGE
Regulator Spring
Propane - White 8.5 turns
Natural Gas - Silver 8.5 turns
Regulator Adjustment
Screw
Regulator Seal Cap
A13048
Fig. 10 -- Single--stage valve
INSTALL LOW GAS PRESSURE SWITCH
NOTE
: Install the Low Gas Pressure Switch before installing the
manifold on the burner assembly.
There are 2 ways to mount the Low Gas Pressure Switch.
All 14 3/16-in Casings or Vent Passed Between Inducer
Assembly and Burner Assembly
If the vent pipe passes between the inducer and burner assembly,
or the furnace is a 14 3/16-in. (360 mm) wide casing, install the
switch as follows (See Fig. 11.):
1. Remove the 1/8-in. NPT pipe plug from the gas valve inlet
pressure tap.
NOTE
: Use pipe dope approved for use with Propane Gas.
NOTE
: Tighten all fittings and the Low Gas Pressure Switch
with a small wrench. Do not over-tighten, check for gas leaks
after gas supply has been turned on.
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death, and/or property damage.
NEVER test for gas leaks with an open flame. Use a
commercially available soap solution made specifically for
the detection of leaks to check all connections. A fire or
explosion may result causing property damage, personal
injury or loss of life.
!
WARNING
RISQUE D’EXPLOSION ET D’INCENDIE
Cet avertissement peut entraîner de la mort, des blessures et/ou
des dégâts matériels.
Ne jamais examiner pour les fuites de gaz avec une flamme
vive. Utilisez plutôt un savon fait specifiquement pour la
détection des fuites de gaz pour verifier tous les connections.
Un incendie ou une explosion peut entrainer des dommages
matériels, des blessures ou la mort.
!
AVERTISSEMENT
2. Apply pipe dope sparingly to the male threads of the
1/8-in. black iron street elbow. Install the street elbow into
the gas valve inlet pressure tap. Point the open end of the
street elbow toward you.
3. Apply pipe dope sparingly to the male threads of the
1/8-in. brass street tee. Install the male end of the street tee
as shown in Fig. 12. One opening on the street tee should
face you. The other opening should be parallel with the
inlet of the gas valve.
4. Apply pipe dope sparingly to the male threads of the
1/8-in. brass hex nipple. Install the hex nipple into the
open end of the brass street tee. See Fig. 12. The hex
nipple should be parallel with the boss on the gas valve.
5. Install the open end of the brass street elbow on the end of
the hex nipple. Tighten the street elbow so the male
threads of the elbow point away from you.
6. Apply pipe dope sparingly to the male threads of the
1/8-in. brass street elbow. Install the Low Gas Pressure
Switch on the male threads of the street elbow. Tighten
switch at hex fitting at base of switch. Do not use switch
body to tighten switch. Do not over-tighten switch.
7. The remaining opening on the brass street tee is the new
gas valve inlet pressure tap. Install manometer fitting to
the open end of the brass street tee. Or if installation is to
be completed later, apply pipe dope to inlet pressure plug
from gas valve and install in open end of brass street tee.
8. Check all fittings for leaks after gas supply has been
turned on.
Casings Wider Than 14 3/16-in. (360 mm
)
/Vent Does Not
Pass Between Inducer and Burner Assembly
1. If the vent pipe does not pass between the inducer and
burner assembly, or the furnace is wider than a 14 3/16-in.
(360 mm) wide casing, install the switch as follows (See
Fig. 12.):
2. Remove the 1/8-in. NPT pipe plug from the gas valve inlet
pressure tap.
NOTE
: Use pipe dope approved for use with Propane Gas.
