Carrier KGBPN42011SP Installation Instructions Manual page 6

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.
Gas Valve (Single Stage) without Tower
Figure 8
Pressure Ports and Green Label
SINGLE-STAGE
ON/OFF Switch
1/2" NPT Inlet
1/8" NPT Inlet
Pressure Tap
Remove the propane regulator spring (white)
Install the natural gas regulator spring (silver)
Figure 8 (cont) − Gas Valve (Single Stage) with
Tower Pressure Ports and without the Green Label
MANIFOLD PRESSURE TAP
SET SCREW: 3/32" HEX HEAD
ACCEPTS 5/16" HOSE CONNECTION
1/2" NPT
INLET
INP
INLET PRESSURE
TAP SET SCREW:
3/32" HEX HEAD
ACCEPTS 5/16"
HOSE CONNECTION
1/8" NPT INLET
PRESSURE TAP
Representative drawing only, some models may vary in appearance.
1/2" NPT
INLET
Representative drawing only, some models may vary in appearance.
Regulator Seal Cap
Regulator Adjustment
Screw
Regulator Spring
Propane - White 8.5 turns
Natural Gas - Silver 8.5 turns
Regulator Seal Cap
Regulator Adjustment
Regulator Seal Cap under Cap
1/2" NPT Outlet
1/8" NPT Manifold
Pressure Tap
1/2" NPT
OUTLET
OUTP
REGULATOR SEAL CAP
ON/OFF SWITCH
(REGULATOR ADJ.
UNDER CAP)
A170118
1/2" NPT
OUTLET
1/8" NPT
INLET PRESSURE TAP
A170133
1. Refer to Figure 8.
2. Be sure gas and electrical supplies to furnace are off.
3. Remove cap that conceals the adjustment screw for the
gas−valve regulator. (See Figure 8)
4. Remove the regulator adjustment screw.
5. Remove the Propane regulator spring (white).
6. Install the natural gas regulator spring (silver).
7. Install the regulator adjustment screw.
8. Turn the adjusting screw clockwise (in) 8.5 full turns. This
will increase the manifold pressure closer to the natural
gas set point. (See Figure 8)
9. DO NOT install regulator seal cap at this time.
REMOVE LOW GAS PRESSURE
SWITCH
There are two ways that the Low Gas Pressure Switch (LGPS)
could have been installed during the original natural to Propane
gas conversion.
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. wide casing. The switch
may be installed as shown in Figure 9.
1. Remove low gas pressure switch, brass street 90_ elbow,
brass Hex nipple, brass tee and black iron street 90_
elbow from the gas valve inlet pressure tap. (See Figure 9)
Use pipe dope approved for use with Propane gas. DO NOT use
Teflon tape.
2. Apply pipe dope sparingly to the 1/8−in. (3 mm) NPT pipe
plug (provided in kit) and install in the 1/8−in tapped
inlet−pressure tap opening in the gas valve. DO NOT
A13048
over−tighten. Check for gas leaks after gas supply has
been turned on.
Figure 9
Black Iron Street 90 Pointing
Low Gas Pressure Switch
Brass Street 90
!
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.
6
LGPS for 14−3/16 Casing or when vent
passes between inducer and burner
assembly
Brass Street Tee
Inlet Pressure Tap with Plug
(Optional inlet pressure
tap on some models)
Brass Hex Nipple
WARNING
A170141