Installation; Bottom Panel Removal - Ducane CMP A Series Installation Instructions Manual

INSTALLATION
In all direct vent (two pipe) instances, the vent outlet shall be installed so as to be in the same amlosphcric pressure zone as the
combustion air intake, When installed, the furnace must be electrically grounded in accordance with local codes or. in the absence of local
codes, with the (U.S.) National Electrical Codes, ANSI/NFPA 70or CSA Standard C22.1; Part 1 Canadian Electrical Code. To properly
install the field wiring of this unit refer to Figures 1.21 & 1.22. In all instances, the wiring to be done, and any replacement of wire shall
conform with the temperature limitation for Type T wire [630F rise (350C)].
To
Prepare
Unit for Installation:
General Requirements
Regardless of which airflow direction that the furnace is
installed, the following steps are required:
1. The electrical connections and the thermostat connections are
made at the openings on either side panel of the unit in the
control box area. Either side may be used, as convenient, but
the provided hole plugs should be inserted in the unused holes.
2. A left, right, or bottom return air opening must be used as
determined by the layout of the installation. An externally
mounted air filter is required.
3. This furnace has a two piece bottom panel. For bottom or end
duct return, remove the back portion of the bottom panel by
removing the four (4) screws---2 on each side toward the back
of the furnace. (See Figure 1.5) Tilt furnace toward the front,
the back portion of the panel will drop down. Then the back
portion can be removed by pulling toward the back of the
furnace. Refer to Figure 2.20 for ductwork sizing.
Figure 1.5 BOTTOM PANEL REMOVAL
Knockouts are provided on both sides of the furnace to
facilitate the cutout required to the return air ductwork. Furnace
cutouts must be the full size specified by the corner markers.
Undersized cutouts will adversely affect the airflow capability
of the furnace and could cause overheating of the heat
exchanger.
The following recommendations should be followed when
installing the ductwork:
1. Install locking-type dampers in all branches of the individual
ducts to balance out the system. Dampers should be adjusted
to impose the proper static at the outlet of the furnace.
2. Noncombustible flexible duct connectors are recommended to
connect both the supply and return duetS to the furnace.
3. In cases where the return air grille is located close to the
blower inlet, there should be at least one 90° air turn between
blower and retUrn grille. Further reduction in sound can be
accomplished by installing acoustical air taming vanes and/or
lining the inside of the duct with acoustical material.
4. It is recommended that the supply duct be provided with a
removable access panel. This opening shall be accessible
when the furnace is installed and shall be of such a size that
the heat exchanger can be viewed for possible openings using
light assistance or a probe can be inserted for sampling the air
stream. The access panel shall be designed so as m prevent
leaks when locked in position, If an air conditioning coil is
installed, the access panel to the coil can be used for this
purpose.
4.
The flue may exit the cabinet either through the right or the
left side panel, depending on the requirements of the
installation. If the unit is installed in a horizontal-left
clischarge position, it is required to exit through the right side
panel, so the flue is pointing straight up when the unit is
installed. See figures 2.8 and 3.8 for configurations.
WARNING
When supply ducts carry air circulated by the
furnace to areas outside the spaces containing the
furnace, the return air shall also be handled by a
duct sealed to the furnace casing and terminating
outside the space containing the furnace. Incorrect
ductwork termination and sealing will create a
hazardous condition that could lead to bodily
harm.
.Ductwork Recommendation:
The proper sizing of warm air ducts is necessary to insure
satisfactory heating operation. Ductwork should be in accordance
with the latest editions of U.S. NFPA-90A (Air Conditioning
S sm_S.x.E_.._) and NFPA-90B (Warm Air Heating and Air
Conditioning Systems) or Canadian equivalent.
The supply ductwork should be attached to the flanged
opening provided at the discharge end of the furnace. See Figure
2.20 for the dimensions of this opening.
CAUTION
Air openings, intake and outlet pipes, retum air
grilles and warm air registers must not be
obstructed.
When installing the furnace with cooling equipment for year
round operation, the following recommendations must be followed
for series or parallel air flow:
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