Roof Curb Mount; Slab Mount (Horizontal Units Only); Alternate Unit Support (In Lieu Of Curb Or Slab Mount) - Carrier WeatherMaker 50KCQ A04 Series Installation Instructions Manual

50KCQ
Base Unit
Economizer
Vertical
Horizontal
Cu Fins
Powered Outlet
Curb
14-in. (356 mm)
24-in. (610 mm)
Step 3 — Inspect Unit
Inspect unit for transportation damage. File any claim with
transportation agency.
Confirm before installation of unit that voltage, amperage and
circuit protection requirements listed on unit data plate agree
with power supply provided.
Step 4 — Provide Unit Support

ROOF CURB MOUNT

Accessory roof curb details and dimensions are shown in
Fig. 10. Assemble and install accessory roof curb in accor-
dance with instructions shipped with the curb.
Curb should be level. This is necessary for unit drain to function
properly. Unit leveling tolerances are shown in Fig. 9. Refer to
Accessory Roof Curb Installation Instructions for additional in-
formation as required.
A
B
Fig. 9 — Unit Leveling Tolerances
Table 5 — Operating Weights
UNITS LB (KG)
04
495 (224)
50 (23)
80 (36)
25 (11)
35 (16)
115 (52)
197 (89)
C
MAXIMUM ALLOWABLE
DIFFERENCE in. (mm)
A-B B-C A-C
0.5 (13) 1.0 (25) 1.0 (25)
UNITS LB (KG)
05
580 (263)
50 (23)
80 (36)
43 (20)
35 (16)
115 (52)
197 (89)
Install insulation, cant strips, roofing felt, and counter flashing
as shown. Ductwork must be attached to curb and not to the
unit. The accessory thru-the-base power package must be in-
stalled before the unit is set on the roof curb.
If electric and control wiring is to be routed through the basepan,
attach the accessory thru-the-base service connections to the base-
pan in accordance with the accessory installation instructions.
NOTE: The gasketing of the unit to the roof curb is critical for a
watertight seal. Install gasket supplied with the roof curb as shown
in Fig. 10. Improperly applied gasket can also result in air leaks
and poor unit performance.

SLAB MOUNT (HORIZONTAL UNITS ONLY)

Provide a level concrete slab that extends a minimum of 6-in.
(150 mm) beyond unit cabinet. Install a gravel apron in front of
condenser coil air inlet to prevent grass and foliage from ob-
structing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.
ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
A non-combustible sleeper rail can be used in the unit curb
support area. If sleeper rails cannot be used, support the long
sides of the unit with a minimum of 3 equally spaced 4-in. x
4-in. (102 mm x 102 mm) pads on each side.
11
UNITS LB (KG)
06
610 (276)
50 (23)
80 (36)
56 (25)
35 (16)
115 (52)
197 (89)