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

This is accomplished by placing setup switch SW1-2 in the ON
position to provide only low-heat operation. See Fig. 32 and Table
9. With this setup, high-heat operation will not occur.
When the model no. on the furnace rating plate is followed by an
asterisk (*), the furnace has an alternate low-heat only efficiency
rating as listed in the GAMA and CEC directories. This alternate
rating will be listed as the furnace model number followed by an
(-L) suffix.
32°F MINIMUM INSTALLED
AMBIENT OR FREEZE
PROTECTION REQUIRED
Fig. 16—Freeze Protection
The furnace can operate in the high-heat mode when certain
fault conditions occur. The following precautions should be
taken:
1.Size gas piping based on the high-heat input.
2.Check the high-heat input and adjust it per the main
literature instructions.
NEVER assume the high-heat input rate is not important for
low-heat-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 shall be adequate to 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
Fig. 17—Installation in a Garage
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
A93058
Protection Association, Inc. (See Fig. 17.)
Step 1—Leveling Legs (If Desired)
When furnace is used in upflow position with side inlet(s), leveling
legs may be desired. (See Fig. 18.) 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. 18.)
Holes in bottom closure panel may be used as guide locations.
5
14
18-IN. MINIMUM
TO BURNERS

INSTALLATION

"
⁄
16
"
5
⁄
16
"
3
1 ⁄
4
"
3
1 ⁄
4
"
5
⁄
16
"
5 ⁄
16
"
3
1 ⁄
4
"
3
1 ⁄
4
Fig. 18—Leveling Legs
A93044
A89014