Step 2 - Rig And Place Unit; Roof Mount; Step 3 - Field Fabricate Ductwork; Step 4 - Make Unit Duct Connections - Carrier 50EJQ Installation, Start-Up And Service Instructions Manual

Step 2 — Rig and Place Unit —
portation damage. File any claim with transportation agency.
Keep unit upright, and do not drop. Use spreader bars over
unit to prevent sling or cable damage. Rollers may be used
to move unit across a roof. Level by using unit frame as a
reference; leveling tolerance is shown in Fig. 1. See Fig. 4
for additional information. Unit weight is shown in Table 1.
NOTE: On retrofit jobs, ductwork may be attached to old
unit instead of roof curb. Be careful not to damage ductwork
when removing unit. Attach existing ductwork to roof curb
instead of unit.
Four lifting lugs are provided on the unit base rails as shown
in Fig. 4. Refer to rigging instructions on unit.
POSITIONING — Provide clearance around and above unit
for airflow, safety, and service access (Fig. 2 and 3).
Do not install unit in an indoor location. Do not locate air
inlets 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 distri-
bution 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
insulated and covered with a vapor barrier.
To attach ductwork to roof curb, insert ductwork approxi-
mately 10 to 11 in. up into the curb. Connect ductwork to
14-gage roof curb material using sheet metal screw driven
from inside the duct.
Inspect unit for trans-
Secure all
WEIGHT
UNIT
50EJQ,EWQ
lb kg
024 4168 1891
028 4168 1891
Fig. 4 — Rigging Label
For vertical supply and return units, tools or parts could
drop into ductwork and cause an injury. Install a
90 degree turn in the return ductwork between the unit
and the conditioned space. If a 90 degree elbow cannot
be installed, then a grille of sufficient strength and den-
sity should be installed to prevent objects from falling
into the conditioned space. Due to electric heater, sup-
ply duct will require 90 degree elbow.
The units with electric heat require a 1-in. clearance for
the first 24 in. of ductwork.
NOTE: A 90-degree elbow must be provided in the duct-
work to comply with UL (Underwriters' Laboratories) codes
for use with electric heat.
Outlet grilles must not lie directly below unit discharge.
Step 4 — Make Unit Duct Connections
50EJQ UNITS — Unit is shipped for through-the-bottom
duct connections. Ductwork openings are shown in Fig. 2.
Attach all ductwork to roof curb. Air distribution is shown
in Fig. 5. Refer to installation instructions shipped with ac-
cessory roof curb for more information.
50EWQ UNITS — Remove shipping covers from supply
and return air openings. Attach field-supplied ductwork to
unit. Use a single duct over both return openings and a single
duct over both supply openings. See Fig. 3 for duct opening
dimensions. Secure all ducts to the building structure. See
Fig. 6. Use flexible duct connectors between unit and ducts
as required.
Install accessory barometric relief or power exhaust in the
field-fabricated return ductwork. Refer to Step 9 — Position
Power Exhaust/Barometric Relief Damper Hood Section on
page 18 for more information.
ALL PANELS MUST BE IN PLACE
NOTE: Rig with four cables and spread with two
92 in. (2337 mm) spreader bars. Maintain a dis-
tance of 74 in. (1880 mm) from top of unit to
eyehook.
NOTE:
Add 32 lb (14.5 kg) for domestic crating.
Add 250 lb (113 kg) for power exhaust.
Add 220 lb (100 kg) for copper condenser coil.
A B
in. mm in. mm
87.68 2227 67.3 1711
87.68 2227 67.3 1711
5
NOTICE TO RIGGERS:
WHEN RIGGING.
C
in. mm
43.6 1107
43.6 1107