Roof Mount; Step 3 - Field Fabricate Ductwork - Carrier 50HJQ014 Installation, Start-Up And Service Instructions Manual

NOTE: CRRFCURB013A00 is a fully factory preassembled horizontal
adapter and includes an insulated transition duct. The pressure drop
through the adapter curb is negligible.
For horizontal return applications: The power exhaust and barometric
relief dampers must be installed in the return air duct.
Fig. 2 — Horizontal Supply/Return Curb and Horizontal Adapter Details
POSITIONING — Provide clearance around and above unit
for airflow, safety, and service access (Fig. 4 and 5).
Do not install unit in an indoor location. Do not locate air in-
lets near exhaust vents or other sources of contaminated air.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
ROOF MOUNT — Check building codes for weight distribu-
tion requirements.
Step 3 — Field Fabricate Ductwork —
ducts to building structure. Use flexible duct connectors be-
tween unit and ducts as required. Insulate and weatherproof all
external ductwork, joints, and roof openings with counter
flashing and mastic in accordance with applicable codes.
Ducts passing through an unconditioned space must be in-
sulated and covered with a vapor barrier.
The 50HJQ units with electric heat require a 1-in. clearance
for the first 24 in. of ductwork.
Outlet grilles must not lie directly below unit discharge.
NOTE: A 90-degree elbow must be provided in the ductwork
to comply with UL (Underwriters Laboratories) codes for use
with electric heat.
3 1/2"
14 3/4"
6"
PACKAGE NO.
CRRFCURB013A00
Secure all
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Refer to Table 1 for unit operating weights.
3. Remove boards at ends of unit and runners prior to rigging.
4. Rig by inserting hooks into unit base rails as shown. Use corner post
from packaging to protect coil from damage. Use bumper boards for
spreader bars.
5. Weights do not include optional economizer. See Table 1 for economizer
weight.
6. Weights given are for aluminum indoor coil plate fins and copper out-
door coil plate fins. Weights of other metal combinations are listed in
Table 1.
3
2" X 1/4
SUPPORT TYP.
STITCH WELDED
12" WIDE STANDING
SEAM PANELS
ACCESSORY CURB
HEIGHT
1'-11" Pre-Assembled, Horizontal
(584)
MAXIMUM SHIPPING WEIGHT
UNIT 50HJQ
lb
014 1895
016 2205
DIMENSION A
UNIT 50HJQ ft-in.
014 3-1
016 3-6
All panels must be in place when rigging.
Fig. 3 — Rigging Details
FULLY INSULATED
SUPPLY PLENUM
1" INSULATION
1 1/2 # DENSITY,
STICK PINNED & GLUED
23"
DESCRIPTION
Adapter Roof Curb
kg
860
1000
mm
948
1059