Location; General; Low-Heat Only Installation - Carrier 58MVP Installation, Start-Up, And Operating Instructions Manual

3. Connect collector box pressure tube (green label) to pressure
switch connection labeled COLLECTOR BOX.
4. Use remaining small diameter tube (factory-supplied in loose
parts bag) to extend collector box pressure tube (pink label)
which was previously connected to pressure switch.
5. Route this extended tube (pink label) to condensate trap relief
port connection.
6. Determine appropriate length, cut, and connect tube.
7. Clamp tube to relief port connection.
CONDENSATE TRAP FREEZE PROTECTION
Refer to Condensate Drain Protection section for recommenda-
tions and procedures.
CONSTRUCT A WORKING PLATFORM
Construct working platform where all required furnace clearances
are met. (See Fig. 3 and 12.)
The condensate trap MUST be installed below furnace. See
Fig. 6 for dimensions. The drain connection to condensate
trap must also be properly sloped to an open drain.
NOTE: Combustion-air and vent pipes are restricted to a mini-
mum length of 5 ft. (See Table 7.)
NOTE: A 12-in. minimum offset pipe section is recommended
with short (5 to 8 ft) vent systems. This recommendation is to
reduce excessive condensate droplets from exiting the vent pipe.
(See Fig. 12 or 35.)

LOCATION

Step 1—General
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This furnace must
• be installed so the electrical components are protected from
water.
• not be installed directly on any combustible material other than
wood flooring (refer to SAFETY CONSIDERATIONS).
• be located so combustion-air and vent pipe maximum lengths
are not exceeded. Refer to Table 7.
• be located where available electric power and gas supplies meet
specifications on the furnace rating plate.
• be attached to an air distribution system and be located as close
to the center of the distribution system as possible. Refer to Air
Ducts section.
• be provided with ample space for servicing and cleaning.
Always comply with minimum fire protection clearances
shown on the furnace clearance-to-combustibles label. (See
Fig. 3.)
This furnace may be located in a confined space without special
provisions for dilution or ventilation air.
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NOTE: For upflow/downflow applications install furnace so that
it is level or pitched forward within 1/2-in. for proper furnace
operation. For horizontal applications pitch 1/4-in. minimum to
1/2-in. maximum forward to ensure proper condensate drainage
from secondary heat exchangers. (See Fig. 14.)
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When a furnace is installed so that supply ducts carry air circulated
by the furnace to areas outside the space containing the furnace,
the return air shall also be handled by ducts sealed to furnace
casing. The ducts terminate outside the space containing the
furnace to ensure there will not be a negative pressure condition
within equipment room or space.
LEVEL (0")
FRONT
TO
⁄ " MAX
1
2
UPFLOW OR DOWNFLOW
Fig. 14—Proper Condensate Drainage
Do not operate this furnace during construction. If the furnace
is required for temporary heating of buildings or structures
under construction, use clean outside air free of chlorine and
fluorine compounds for combustion and ventilation. These
compounds form acids that corrode the heat exchangers.
These compounds are found in paneling and dry wall adhe-
sives, paints, thinners, masonry cleaning materials, and many
other solvents.
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The furnace and its return air system shall be designed and
installed so that negative pressure created by the air circulating fan
cannot affect another appliance's combustion air supply or act to
mix products of combustion with circulating air, and that the air
circulating fan of the furnace, if installed in an enclosure commu-
nicating with another fuel-burning appliance not of the direct-vent
type, shall be operable only when any door or panel covering an
opening in the furnace fan compartment or in a return air plenum
on ducts is in the closed position.
Do not install furnace on its back. Safety control operation
will be adversely affected. Never connect return-air ducts to
back of furnace. Failure to follow this warning could result in
fire, personal injury, or death. (See Fig. 15.)
FRONT
BACK
FRONT
Fig. 15—Prohibit Installation on Back
If these furnaces are installed in an unconditioned space
where ambient temperatures may be 32°F or lower, freeze
protection measures must be taken. (See Fig. 16.)
Step 2—Low-Heat Only Installation
This 58MVP furnace can be installed to operate in the low-heat
only heating mode when sized using the low-heat heating capacity.
13
FRONT
⁄ "
MIN 1
4
TO
⁄ " MAX
1
2
HORIZONTAL
B
A
C
K
A93043
A02146