International comfort products NAHB00101MH Installation Instructions Manual page 9

tight. Tighten switch at hex fitting at base of switch. Do
not use switch body to tighten switch. Do not over-tighten
switch.
6. 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.
7. Check all fittings for leaks after gas supply has been
turned on.
Low Gas Pressure Switch − All Widths
Figure 17
(Must be used on the 14−3/16−in.)
Black Iron Street 90 Pointing
Low Gas Pressure Switch
Brass Street 90
LGPS for casing wider than 14−3/16 in
Figure 18
and vent does not pass between
inducer and burner assembly
For larger casing when Vent Pipe does not pass across Casing. All Sizes switch
contacts must point tward the Cell Panel. Black Iron Street 90 can be used at Valve Inlet
instead of Brass Street 90.
Brass Street Tee
Inlet Pressure Tap with Plug
Low Gas Pressure
Switch
INSTALL LOW GAS PRESSURE SWITCH
WIRES
1. Locate the orange wire in the kit with an insulated
straight female spade terminal and an insulated straight
male terminal on the other end.
2. Connect the female terminal to a terminal on the Low
Gas Pressure Switch.
3. Locate the orange wire in kit with an insulated straight
female spade terminal and an insulated female flag
terminal on the other end.
4. Connect both straight female terminals of the orange
wires to the terminals on the Low Gas Pressure Switch.
443 06 4003 00
Re−install pipe plug
after removal
Brass Street Tee
Inlet Pressure Tap with Plug
Brass Hex Nipple
L13F012
Brass Street 90
Brass Nipple
A11533
Specifications subject to change without notice.
INSTALL MANIFOLD
1. Refer to Figure 3 and Figure 9.
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.
NOTE: 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. (See Figure 3)
5. Install the remaining manifold mounting screws.
6. Connect the wires to the flame sensor and hot surface
igniter.
7. Connect the wires to gas valve.
NOTE: Use only propane−resistant pipe dope. Do not use
Teflon tape.
8. 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 into the gas valve.
NOTE: 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.
9. With a back−up wrench on the inlet boss of the gas
valve, finish tightening the gas pipe to the gas valve.
MODIFY PRESSURE SWITCH WIRING
CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in unit damage or
improper operation.
Label all wires prior to disconnection when servicing controls.
PRUDENCE
!
D'EQUIPEMENT D'OPERATION
Toute erreur de câblage peut être une source de danger et
de panne.
Lors des opérations d'entretien des commandes, étiqueter
tous les fils avant de les déconnecter.
1. Disconnect orange wire from Low Heat Pressure Switch
LPS on inducer housing.
2. Connect the orange wire from the Low Heat Pressure
Switch to the orange wire with the insulated male spade
terminal. (See Figure 19)
3. Connect the orange wire from the Low Gas Pressure
Switch to the terminal on the Low Heat Pressure Switch.
4. Route orange wires along wire harness. If possible,
secure with wire tie provided in kit.
Figure 19
Pressure Switch Wiring
ORN
A11534
9