19
Figure 25
80% Low Gas Pressure Switch
L13F014
2” Brass Nipple
Low Gas
Pressure Switch
Female x Female x Male Tee
1/8” NPT Pipe Plug
For inlet pressure tap
Re
−
install pipe
plug after removal
INSTALL MANIFOLD
1. Refer to
and
2. Align the orifices in the manifold assembly with the support
rings on the end of the burner.
3. Insert the orifices in the support rings of the burners.
Manifold mounting tabs should fit flush against the burner
box.
If manifold does not fit flush against the burner box, the burners
are not fully seated forward. Remove the manifold and check
burner positioning in the burner box assembly.
4. Attach the green/yellow wire and ground terminal to one of
the manifold mounting screws.
5. Install the remaining manifold mounting screws.
6. Connect the wires to the flame sensor and hot surface
igniter.
7. Connect the connector harness to gas valve.
8. Rewire unit low pressure switch (LPS) as follows:
a. Trace one of the orange wires previously disconnected
from the LGPS back to the NO terminals of the LPS.
b. Trace the other orange wire previously disconnected
from the LGPS back to its splice connection with the
yellow wire of the furnace wire harness. Disconnect
and discard this orange wire and the splice connection.
c. Connect the yellow wire of the furnace wire harness
(see “b” above) to the NO terminal of the LPS.
d. Refer to the furnace wiring diagram to ensure proper
location of wires.
Use only Propane-resistant pipe dope. DO NOT use Teflon tape.
9. Insert the gas pipe through the grommet in the casing.
Apply a thin layer of pipe dope to the threads of the pipe
and thread the pipe by into the gas valve.
Use a back-up wrench on the gas valve to prevent the valve from
rotating on the manifold or damaging the mounting to the burner
box.
10. With a back-up wrench on the inlet boss of the gas valve,
finish tightening the gas pipe to the gas valve.
11. Turn gas on at electric switch on gas valve.
CHECK INLET GAS PRESSURE
!
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit damage.
DO NOT operate furnace more than one minute to check inlet
gas pressure, as conversion is not complete at this time.
This kit is to be used only when inlet gas pressure is between
4.5
−
in. w.c. and 13.6
−
in. w.c.
1. Verify manometer is connected to inlet pressure tap on gas
valve.
2. Turn on furnace power supply.
3. Turn gas supply manual shutoff valve to ON position.
4. Turn furnace gas valve switch to ON position.
5. Jumper R
−
W thermostat connections on control.
6. When main burners ignite, confirm inlet gas pressure is
between 4.5
−
in. w.c. and 13.6
−
in. w.c.
7. Remove jumper across R
−
W thermostat connections to
terminate call for heat.
8. Turn furnace gas valve switch to OFF position.
9. Turn gas supply manual shutoff valve to OFF position.
10. Turn off furnace power supply.
11. Remove manometer.
12. Apply pipe dope sparingly to the 1/8 in. (3 mm) NPT pipe
plug and install in the 1/8 in. (3 mm) tapped inlet pressure
tap opening in the gas valve. DO NOT over
−
tighten. Check
for gas leaks after gas supply has been turned on.
CHECK FURNACE AND MAKE
ADJUSTMENTS
!
WARNING
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in personal injury
and/or death.
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.
!
AVERTISSEMENT
RISQUE D’EXPLOSION ET D’INCENDIE
Le fait de ne pas suivre cet avertissement pourrait entraîner
des dommages corporels et / ou la mort.
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.
!
WARNING
FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
Gas supply MUST be shut off before disconnecting electrical
power and proceeding with conversion.
!
WARNING
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
Before installing, modifying, or servicing system, main electrical
disconnect switch must be in the OFF position and install a
lockout tag. There may be more than one disconnect switch.
Lock out and tag switch with a suitable warning label. Verify
proper operation after servicing.
1. Be sure main gas and electric supplies to furnace are off.
2. Remove 1/8-in. NPT pipe plug from manifold pressure tap
on downstream side of gas valve.
3. Attach manometer to manifold pressure tap on gas valve.
See
4. Turn gas supply manual shutoff valve to ON position.
