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

PERFORATED
DISCHARGE DUCT
FLANGE
Fig. 23—Duct Flanges
NOTE: Remove furnace perforated, discharge duct flanges when
they interfere with mating flanges on coil on downflow subbase.
To remove furnace perforated, discharge duct flange, use wide
duct pliers or duct flange tool to bend flange back and forth until
it breaks off. Be careful of sharp edges. (See Fig. 23.)
A 3-IN. MINIMUM
CLEARANCE TO
COMBUSTION-AIR INTAKE
IS REQUIRED.
ANGLE
IRON OR
EQUIVALENT
(B)
(A) ROD LOCATION
USING DIMPLE
LOCATORS
(SEE DIMENSIONAL
DWG FOR
LOCATIONS)
(A) PREFERRED ROD LOCATION
(B) ALTERNATE ROD LOCATION
NO
YES
210°
MIN
YES
A93029
COMBUSTION-AIR
INTAKE
(B)
(A)
3
/ -IN. HEX NUT
8
& WASHER (4)
REQD PER ROD
Fig. 24—Crawlspace Horizontal Application
→
UNIT MAY NOT OPERATE
Failure to follow this caution could result in intermittent unit
operation.
Do not bend duct flanges inward as shown in Fig. 23. This
will affect airflow across heat exchangers and may cause limit
cycling or premature heat exchanger failure. Remove duct
flange completely or bend it inward a minimum of 210° as
shown in Fig. 23.
Step 3—Installation in Horizontal Applications
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit
operation.
The entire length of furnace MUST be supported when
furnace is used in a horizontal position to ensure proper
draining. When suspended, bottom brace supports sides and
center blower shelf. When unit is supported from the ground,
blocks or pad should support sides and center blower shelf
area.
These furnaces can be installed horizontally in either horizontal
left or right discharge position. In a crawlspace, furnace can either
be hung from floor joist or installed on suitable blocks or pad.
Furnace can be suspended from each corner by hanger bolts and
angle iron supports. (See Fig. 24.) Cut hanger bolts (4 each 3/8-in.
all-thread rod) to desired length. Use 1 X 3/8-in. flat washers,
VENT
"
3
5 ⁄
4
DRAIN
(A)
(B)
13
/ -IN. MAX
16
(A) (B)
ALTERNATE SUPPORT
LOCATION FROM BACK
NOTES: 1. A 1 In. clearance minimum between top of
furnace and combustible material.
2. The entire length of furnace must be
supported when furnace is used in
horizontal position to ensure proper
drainage.
3. Bottom side combustion-air entry cannot
be used when furnace is installed with
hangers as shown.
19
3 ⁄ -IN. ROD
8
ALTERNATE SUPPORT
LOCATION 4-IN. MIN
8-IN. MAX
A96209