Downflow Applications - Carrier 58MSA Installation, Start-Up, And Operating Instructions Manual

NOTE: See Fig. 5 or 6 or tube routing label on main furnace door
to check for proper connections.
UPPER COLLECTOR BOX AND INDUCER HOUSING (UN-
USED) DRAIN CONNECTIONS
Upper Collector Box Drain Connection
Attached to the UPPER collector box drain connection is a
factory-installed corrugated, plugged tube (blue and white striped
label). This tube is plugged to prevent condensate leakage in this
application. Ensure this tube is plugged.
NOTE: See Fig. 5 or 6 or tube routing label on main furnace door
to check for proper connections.
Upper Inducer Housing Drain Connection
Attached to the UPPER (unused) inducer housing drain connection
is a cap and clamp. This cap is used to prevent condensate leakage
in this application. Ensure this connection is capped.
NOTE: See Fig. 5 or 6 or tube routing label on main furnace door
to check for proper connections.
CONDENSATE TRAP FREEZE PROTECTION
Refer to Condensate Drain Protection section for recommenda-
tions and procedures.
Step 3—Downflow Applications
A downflow furnace application is where furnace blower is located
above combustion and controls section of furnace, and conditioned
air is discharged downwards.
CONDENSATE TRAP LOCATION
The condensate trap must be removed from the factory-installed
blower shelf location and relocated in selected application location
as shown in Fig. 2, 7, or 8.
To relocate condensate trap from the blower shelf to desired
location, perform the following:
COLLECTOR BOX
DRAIN TUBE (BLUE)
CAP
PLUG
COLLECTOR BOX
TUBE (GREEN)
COLLECTOR BOX
EXTENSION TUBE
COLLECTOR BOX
TUBE (PINK)
COLLECTOR BOX
DRAIN TUBE (BLUE
& WHITE STRIPED)
COLLECTOR BOX
EXTENSION TUBE
CONDENSATE
TRAP
INDUCER HOUSING
DRAIN TUBE (VIOLET)
Fig. 7—Downflow Tube Configuration (Left-Hand
Trap Installation)
1. Remove 3 tubes connected to condensate trap.
2. Remove trap from blower shelf by gently pushing tabs inward
and rotating trap.
3. Remove casing hole filler cap from casing hole. (See Fig. 2, 7,
or 8.)
4. Install casing hole filler cap into blower shelf hole where trap
was removed.
5. Install condensate trap into desired casing hole by inserting
tube connection stubs through casing hole and rotating until
tabs snap into locking position.
CONDENSATE TRAP TUBING
NOTE: See Fig. 7 or 8 or tube routing label on main furnace door
to check for proper connections.
1. Collector Box Drain Tube
a. Remove factory-installed plug from LOWER collector box
drain tube (blue and white striped label).
b. Install removed clamp and plug into UPPER collector box
drain tube (blue label) which was connected to condensate
trap.
c. Connect LOWER collector box drain connection to con-
densate trap.
(1.) Condensate Trap Located on Left Side of Casing
(a.) Connect LOWER collector box drain tube (blue
and white striped label) to condensate trap. Tube
does not need to be cut.
(b.) Clamp tube to prevent any condensate leakage.
(2.) Condensate Trap Located on Right Side of Casing
DRAIN TUBE
COUPLING
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Fig. 8—Downflow Tube Configuration
(Right-Hand Trap Installation)
7
PLUG
CAP
COLLECTOR BOX
DRAIN TUBE (BLUE)
COLLECTOR BOX
TUBE (PINK)
COLLECTOR BOX
TUBE (GREEN)
COLLECTOR BOX
EXTENSION TUBE
COLLECTOR BOX
DRAIN TUBE (BLUE
& WHITE STRIPED)
COLLECTOR BOX
EXTENSION TUBE
INDUCER HOUSING
DRAIN TUBE
(VIOLET)
CONDENSATE
TRAP
COLLECTOR BOX
EXTENSION
DRAIN TUBE
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