Furnace Location Relative To Cooling Equipment; Hazardous Locations; Installation; Leveling Legs (If Desired) - Carrier 58MVP Installation, Start-Up, And Operating Instructions Manual

The furnace can operate in the high-fire mode when certain
fault conditions occur. The following precautions should be
taken:
1. Size gas piping based on the high-fire input.
2. Check the high-fire input and adjust it per the main
literature instructions.
NEVER assume the high-fire input rate is not important for
low-fire-only installation.
Step 3—Furnace Location Relative to Cooling
Equipment
The cooling coil must be installed parallel with or on downstream
side of furnace to avoid condensation in heat exchanger. When
installed parallel with a furnace, dampers or other means used to
control flow of air must prevent chilled air from entering furnace.
If dampers are manually operated, they must be equipped with a
means to prevent operation of either unit unless damper is in
full-heat or full-cool position.
Step 4—Hazardous Locations
When furnace is installed in a residential garage, it must be
installed so that burners and ignition sources are located a
minimum of 18 in. above floor. The furnace must be located
or protected to avoid physical damage by vehicles. When
furnace is installed in a public garage, airplane hangar, or
other building having a hazardous atmosphere, unit must be
installed in accordance with requirements of National Fire
Protection Association, Inc.

INSTALLATION

Step 1—Leveling Legs (If Desired)
When furnace is used in upflow position with side inlet(s), leveling
legs may be desired. (See Fig. 12.) Install field-supplied,
corrosion-resistant 5/16-in. machine bolts and nuts.
NOTE: The maximum length of bolt should not exceed 1-1/2 in.
1. Position furnace on its back. Locate and drill a 5/16-in.
diameter hole in each bottom corner of furnace. (See Fig. 12.)
Holes in bottom closure panel may be used as guide locations.
2. For each hole, install nut on bolt and then install bolt and nut
in hole. (Install flat washer if desired.)
3. Install another nut on other side of furnace base. (Install flat
washer if desired.)
18-IN. MINIMUM
TO BURNERS
A93044
"
5 ⁄
16
"
3
1 ⁄
4
"
5
⁄
16
1
Fig. 12—Leveling Legs
4. Adjust outside nut to provide desired height, and tighten inside
nut to secure arrangement.
NOTE: Bottom closure must be used when leveling legs are used.
See Bottom Closure Panel section.
Step 2—Installation in Upflow or Downflow
Applications
NOTE: This furnace is approved for use on combustible flooring
when manufacturer's
KGASB0201ALL, is used. Manufacturers accessory floor base in
not required when this furnace is installed on manufacturer's Coil
Assembly Part No. CD5 or CK5, or Coil Box Part No. KCAKC is
used.
1. Determine application being installed from Table 1.
2. Construct hole in floor per dimensions specified in Table 1
and Fig. 13.
3. Construct plenum to dimensions specified in Table 1 and Fig.
13.
4. If downflow subbase (KGASB) is used, install as shown in
Fig. 14.
If coil assembly CD5 or CK5 or Coil Box KCAKC is used,
install as shown in Fig. 15.
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. 16.)
Do not bend duct flanges inward as shown in Fig. 16. 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. 16.
13
"
5
⁄
16
"
3
1 ⁄
4
"
5
⁄
16
"
3
⁄
4
"
3
1 ⁄
4
accessory floor base, Part
A89014
No.