Identifying And Preparing Units - Carrier 40WAU Series Installation And Maintenance Instructions Manual

IDENTIFYING AND PREPARING UNITS -- Be sure
power requirements match available power source. Refer to
unit nameplate and wiring diagram. In addition:
• Check all tags on unit to determine if shipping screws are
to be removed. Remove screws as directed.
Rotate the fan wheel by hand to ensure that the fan is
unrestricted and can rotate freely. Check for shipping
damage and fan obstructions. Adjust blower motor as
required.
Step 2 E Position the Unit
• The unit should be at least 24 in. from a wall or similar
obstruction. See Fig. 5.
OBSTRUCTION OBSTRUCTION
24 in.
min.
Units must not be installed where they may be exposed to
potentially explosive or flalmnable atmosphere. If this
instruction is not followed exactly, a fire or explosion may
result, causing property damage, injury, or loss of life.
Install the unit in a location that meets the following require-
ments:
Allow adequate space for installation, service clearance,
piping and electrical connections, and necessary duct-
work. For specific unit dimensions, refer to Table 1 and
Fig. 2 and 3. Allow clearance according to local and
national codes.
• Confirm that the ceiling or wall is able to support the
weight of the unit. See Table 1 for nominal weight.
• There should be adequate space between the false ceiling
and unit top for under-ceiling units, or between the wall
and the back for floor units, for installation and mainte-
nance (see Fig. 4).
• Install the unit in a location within the room that allows
uniform air flow in all directions.
I
V4in. min. [
FALSE CEILING
1
JS
, OOT ET
WALL
3/4in. min.
_, AIR OUTLET
Fig. 4 -- Spacing from Ceiling or Wall
Select the unit position with the following points in mind:
• The unit should be installed in a position that is suitable
to support the total weight of the unit, refrigerant piping
and condensate.
Proper access should be provided for maintenance for
refrigerant piping, EXV (electronic expansion valve),
electrical box, and condensate pump. A 2-ft clearance is
recommended all around the unit.
OBSTRUCTION
24 in.
Fig. 5 -- Distance from Wall or Obstruction
• Do not position where the discharge air could blow
directly on the thermostat.
• The unit should not be positioned directly above any
obstruction.
The unit must be installed square and level.
The condensate drain should have sufficient downward
slope (1 in. per 100 in.) in any horizontal run between
unit and drain.
IMPORTANT: Be sure that the ceiling grid is supported
separately from the unit. The ceiling grid must not be
supported by an part of the unit or any associated wir-
ing or piping work.
Step 3 E Mount the Unit
INSTALLING HANGER BOLTS (UNDER CEILING
MOUNT) -- Install the hanger bolts at the locations shown in
Fig. 6. Use 3/s-in. all-threaded rod. For unit weight and mount-
ing dimensions, see Table 2.
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GING
ARM
Fig. 6- Hanging Bracket Locations