Pre-Installation; Unpack Unit; Blank Off Pieces; Positioning - Carrier AirStream 42WKN08-36 Installation, Operation And Maintenance Instructions

PRE-INSTALLATION

Unpack Unit

Remove the banding straps and lift the cardboard lid. Remove the
fascia, packed in bubble wrap, and polystyrene packing pieces to
expose the unit.
When removing the unit chassis from the box, the four corner
brackets should be utilized for lifting. In order to protect the fascia
from dirt and damage, it should be returned to the box until it is
ready to be installed.

Blank Off Pieces

When branch ducting is to be used, polystyrene pieces for blank-
ing off fascia openings are included with the fascia packing. Up to
two opposing sides may be blanked off. See "Duct Collars" in In-
stallation section, page 43.

Positioning

Appliances must not be installed where they may be exposed
to potentially explosive or flammable atmosphere.
Les appareils ne doivent pas être installés à un endroit où ils
risquent d'être exposés à une atmosphère potentiellement
explosive ou inflammable.
IMPORTANT: Unit Performance will be significantly reduced
at or above 7215 ft (2200 m) and should not be operated above
this altitude.
IMPORTANT: La performance de l'unité sera grandement
réduite à une altitude de 7215 pieds (2200 m) et elle ne doit
pas être utilisée au-delà de cette hauteur.
The unit installation position should be selected with the following
points in mind:
1. The appliance must be installed on a structure that is suit-
able to support the total weight of the appliance, piping,
and condensate.
2. Piping, electrical panel and condensate pump access panel
should be readily accessible for maintenance purposes. A
2 ft (0.61 m) clearance is recommended around the electri-
cal panel and condensate pump access panel.
3. The unit should not be positioned less than 5 ft (1.5 m)
from a wall or similar obstruction, or in a position where
the discharge air could blow directly on to the thermostat.
A 5 ft (1.5 m) clearance is required below the unit for ser-
vice access.
4. The unit should not be positioned directly above any
obstructions.
5. The unit must be installed square and level.
6. The condensate drain should have sufficient downward
slope, 1 in. per 100 in. (2.5 cm per 254 cm), in any hori-
zontal run between unit and drain. Maximum condensate
pump lift is 30 inches (76.2 cm).
7. There should be sufficient room above the false ceiling for
installing the unit. Minimum distance as shown in Fig. 37.
8. In case of high humidity, clogged or damaged condensate
piping, incorrect installation or faulty condensate pump,
water may drip from the unit. Do not install the appliance
where dripping water can cause damage.
DANGER
DANGER

Ceiling Opening Sizes

An opening in the false ceiling will then have to be cut to the size
shown in Table 4.
30 in.
MAX.
42WKN UNIT SIZE
08,12
18,20
33,36
Fig. 37 — Minimum Distance to Ceiling
Table 4 — Ceiling Opening Dimensions
42WKN UNIT SIZE
08,12
18,20
33,36
A cardboard template for ceiling cutout and rod positions is in-
cluded with the unit.

Positioning the Electro-Mechanical Thermostat

In addition to positioning the unit correctly, it is very important to
locate the wall-mounted thermostat in the optimum position to en-
sure good temperature control. Therefore, the installation should
be selected with the following points in mind:
1. Position the thermostat approximately 48 in. (122 cm)
above floor level.
2. Do not position thermostat where it can be directly
affected by the unit's discharge airstream.
3. Avoid external walls and drafts from windows and doors.
4. Avoid positioning near shelves and curtains as these
restrict air movement.
5. Avoid heat sources e.g., direct sunlight, heaters, dimmer
switches and other electrical devices.

INSTALLATION

IMPORTANT: Make sure the ceiling grid is supported sepa-
rately from the appliance. The ceiling must not be supported
by any part of the appliance, fascia or any associated wiring or
pipe work.
IMPORTANT: For ceiling mounted units, check that the
ceiling is capable of supporting the weight of the unit. If used
within a ceiling grid, the ceiling grid is to be supported
separately from the unit.
IMPORTANT: Pour les unités installées au plafond, vérifiez
que le plafond peut soutenir le poids de l'unité. En cas
d'utilisation au sein d'un support de plafond, ce dernier doit
être soutenu séparément de l'unité.
Step 1 — Hanger Bolts
The hanger bolts can now be installed at the centers shown in
Fig. 38. Use 3/8 in. all thread rod.
Check the strength of the unit mounting hanger bolts. Refer to
Tables 2 and 3 for unit weights.
42
a42-4049 A
DIMENSION A
12-3/4 in.(32.40 cm)
11-1/2 in. (29.20 cm)
13-1/2 in. (34.30 cm)
DIMENSIONS (in.)
23 in. x 23 in. (58.42 cm x 58.42 cm)
34 in. x 34 in. (86.63 cm x 86.36 cm)
46 in. x 34 in. (116.8 cm x 86.36 cm)