Carrier 58MCA - Manual (Page 6)

Fig. 8—Furnace Pressure and Drain Tubing Diagram
A96212
Furnace is shipped from factory in upflow configuration. Pressure tube and drain tube routing MUST match the diagrams below.
322593-101 REV. A
NOTE:
This appliance requires a special venting system. Refer to the
installation instructions for parts list and method of installation.
Furnace must be installed level, or pitched forward within 1/2 inch
of level for proper drainage. Failure will result in equipment or
property damage. See Installation Manual for IMPORTANT unit
support details on horizontal applications.
HORIZONTAL
UPFLOW OR
DOWNFLOW
1/2" MAX
FRONT
FRONT
1/2" MAX
TO
LEVEL (0") LEVEL (0")
INSTALLATION
TO
Tube location when used in DOWNFLOW application
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.
Tube location when used on
HORIZONTAL - RIGHT application
PLUG
CAP
COLLECTOR BOX
DRAIN TUBE (BLUE
& WHITE STRIPED)
COLLECTOR BOX
TUBE (PINK)
COLLECTOR BOX
DRAIN TUBE (BLUE)
INDUCER
HOUSING
DRAIN TUBE
(VIOLET)
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
Condensate Trap; Factory
Installed in Blower Shelf
CONDENSATE
TRAP
COLLECTOR BOX
TUBE (GREEN)
Condensate Trap on LEFT
Side Optional
CAP
PLUG COLLECTOR BOX
DRAIN TUBE (BLUE)
PLUGGED END
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
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)
Condensate Trap on
RIGHT Side
COLLECTOR BOX
EXTENSION DRAIN
TUBE
DRAIN TUBE
COUPLING
GAS VALVE
AUXILIARY "J" BOX
RELOCATED HERE
PLUG
CAP
COLLECTOR BOX DRAIN TUBE
(BLUE & WHITE STRIPED)
CONDENSATE TRAP
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
CAP
PLUG
COLLECTOR BOX DRAIN TUBE (BLUE)
COLLECTOR BOX EXTENSION TUBE
COLLECTOR BOX TUBE (PINK)
COLLECTOR BOX
TUBE (GREEN)
COLLECTOR BOX DRAIN TUBE
(BLUE AND WHITE STRIPED)
INDUCER HOUSING DRAIN
TUBE (VIOLET)
CONDENSATE
TRAP
Condensate Trap on
LEFT Side
COLLECTOR BOX
DRAIN TUBE
(BLUE)
PLUG
Tube location when used in UPFLOW application
Tube location when used on
HORIZONTAL - LEFT application
CAP
PLUG
COLLECTOR
BOX
EXTENSION
TUBE
(Blower access panel removed)
DRAIN TUBE
COUPLING
COLLECTOR BOX
EXTENSION DRAIN TUBE
COLLECTOR BOX
EXTENSION TUBE
COLLECTOR
BOX
EXTENSION
DRAIN TUBE
6