Carrier 58MVB - Page 8

1. Turn off gas and electrical supplies to furnace.
2. Remove main furnace door.
3. Disconnect igniter wire connection.
4. Check igniter resistance. Igniter resistance is affected by
temperature. Only check resistance when the igniter is at room
temperature.
a. Using an ohm meter, check resistance across both igniter
leads in connector.
b. Cold reading should be between 40 ohms and 70 ohms.
5. Remove igniter assembly.
a. Remove burner box cover.
b. Remove igniter wires from slot in manifold grommet. (See
Fig. 7.)
c. Using a 1/4-in. driver, remove the single screw securing the
igniter bracket to the burner box bracket (See Fig. 13.) and
carefully withdraw the igniter and bracket assembly
through the front of the burner box without striking the
igniter on surrounding parts. Note that the igniter bracket
has a handle that extends to the front of the burner box to
aid in handling. (See Fig. 13.)
d. Inspect igniter for signs of damage or failure.
Fig. 10—Furnace Pressure and Drain Tubing Diagram
A00351
Furnace is shipped from factory in upflow configuration. Pressure tube and drain tube routing MUST match the diagrams below.
Tube location when used in DOWNFLOW application
Tube location when used on
HORIZONTAL - RIGHT application
Condensate Trap; Factory Installed
in Blower Shelf
Condensate Trap on
RIGHT Side
Condensate Trap on
LEFT Side
Tube location when used in UPFLOW application
Tube location when used on
HORIZONTAL - LEFT application
(Blower access panel removed)
1. All tubing must be connected securely and routed to avoid kinks and traps.
2. Pressure tubing must always slope away from pressure switch to collector box connection as shown.
3. HORIZONTAL-LEFT installations require the collector box pressure tube to be relocated between the inducer housing and
the blower shelf to prevent a trap.Refer to the Installation Instructions for further details.
NOTE:
325400-201 REV. C
(LIT - BOTTOM)
COLLECTOR BOX TUBE
(PINK)
COLLECTOR BOX
DRAIN TUBE
(BLUE & WHITE STRIPED)
COLLECTOR BOX DRAIN TUBE
(BLUE)
INDUCER HOUSING (MOLDED) DRAIN TUBE
(BEHIND COLLECTOR BOX DRAIN TUBE)
FIELD-INSTALLED
FACTORY-SUPPLIED DRAIN TUBE
COUPLING (LEFT DRAIN OPTION)
FIELD-INSTALLED FACTORY-
SUPPLIED DRAIN TUBE
FIELD-INSTALLED
FACTORY-SUPPLIED
1/2-IN. CPVC STREET
ELBOWS (2) FOR LEFT
DRAIN OPTION
FIELD-INSTALLED
FACTORY-SUPPLIED DRAIN
TUBE COUPLING (RIGHT
DRAIN OPTION)
COLLECTOR BOX TUBE (GREEN)
CONDENSATE TRAP
CAP
PLUG
PLUG
CAP
COLLECTOR BOX
DRAIN TUBE
(BLUE & WHITE STRIPED)
COLLECTOR BOX TUBE
(PINK)
COLLECTOR BOX DRAIN TUBE
(BLUE)
INDUCER HOUSING
DRAIN TUBE
(VIOLET)
CONDENSATE TRAP
COLLECTOR BOX TUBE
(GREEN)
Condensate Trap on LEFT
Side Optional
CAP
COLLECTOR BOX DRAIN TUBE
(BLUE)
COLLECTOR BOX DRAIN TUBE
(BLUE & WHITE STRIPED)
COLLECTOR BOX TUBE (GREEN)
COLLECTOR BOX TUBE
(PINK)
COLLECTOR BOX
EXTENSION TUBE
CONDENSATE TRAP
INDUCER HOUSING DRAIN TUBE (VIOLET)
COLLECTOR BOX
EXTENSION TUBE
PLUG
PLUG
COLLECTOR BOX TUBE
(PINK)
COLLECTOR BOX DRAIN TUBE
(BLUE)
COLLECTOR BOX TUBE
(GREEN)
CONDENSATE TRAP
INDUCER HOUSING
DRAIN TUBE
(VIOLET)
COLLECTOR BOX EXTENSION TUBE
COLLECTOR BOX DRAIN TUBE
(BLUE & WHITE STRIPED)
COLLECTOR BOX EXTENSION
DRAIN TUBE
DRAIN TUBE
COUPLING
CAP
GAS VALVE
DRAIN TUBES ROUTED IN
FRONT OF GAS VALVE
PLUG
CAP
COLLECTOR BOX DRAIN TUBE
(BLUE & WHITE STRIPED)
CONDENSATE TRAP
COLLECTOR BOX EXTENSION DRAIN TUBE
COLLECTOR BOX
EXTENSION TUBE
COLLECTOR
BOX TUBE
(GREEN)
INDUCER HOUSING
DRAIN TUBE
(VIOLET)
COLLECTOR BOX TUBE (PINK) RELOCATE TUBE BETWEEN BLOWER SHELF AND
INDUCER HOUSING FOR 040,060, AND 080 HEATING INPUT FURNACES
DRAIN TUBE
COUPLING
COLLECTOR BOX
DRAIN TUBE (BLUE)
AUXILIARY "J" BOX
RELOCATED HERE
CAP
PLUG
COLLECTOR BOX DRAIN TUBE (BLUE)
COLLECTOR BOX TUBE (GREEN)
COLLECTOR BOX TUBE (PINK)
COLLECTOR BOX DRAIN TUBE
(BLUE AND WHITE STRIPED)
COLLECTOR BOX
EXTENSION TUBE
CONDENSATE TRAP
INDUCER HOUSING DRAIN TUBE (VIOLET)
BURNER ENCLOSURE PRESSURE
REFERENCE TUBE ASSEMBLY
BURNER ENCLOSURE PRESSURE
REFERENCE TUBE ASSEMBLY
BURNER ENCLOSURE
PRESSURE REFERENCE
TUBE ASSEMBLY
BURNER ENCLOSURE PRESSURE
REFERENCE TUBE ASSEMBLY
BURNER
ENCLOSURE
PRESSURE
REFERENCE
TUBE ASSEMBLY
BURNER
ENCLOSURE
PRESSURE
REFERENCE TUBE
ASSEMBLY
TUBE ROUTING
8
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