Step 2 - Rig And Place Unit; Roof Mount; Positioning - Carrier SINGLE PACKAGE ROOFTOP UNITS ELECTRIC COOLING/GAS HEATING 48HJ015-025 User Manual

Fig. 2 — Horizontal Supply/Return Curb
and Horizontal Adapter Details
ALTERNATE UNIT SUPPORT — When the curb cannot
be used, install unit on a noncombustible surface. Support
unit with sleepers, using unit curb support area. If sleepers
cannot be used, support long sides of unit with a minimum
of 3 equally spaced 4-in. x 4-in. pads on each side.
Step 2 — Rig and Place Unit —
portation damage. File any claim with transportation agency.
MAXIMUM SHIPPING
UNIT
WEIGHT
48HJ
Lb
D015 1920
E015 1940
E017 2310
D025 2535
Dimension A
UNIT Ft-in.
48HJD015 3-1
48HJE015 3-1
48HJE017 3-4
48HJD025 3-4
Inspect unit for trans-
Kg
871
880
1048
1150
mm
3 ⁄ 949
8
1 ⁄ 946
4
3 ⁄ 1035
4
⁄ 1010
3
4
Fig. 3 — Rigging Details
Do not drop unit; keep upright. 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 ±
direction. See Fig. 3 for additional information. Unit oper-
ating weight is shown in Table 1.
Four lifting holes are provided in ends of unit base rails
as shown in Fig. 3. Refer to rigging instructions on unit.
POSITIONING — Maintain clearance, per Fig. 4 and 5, around
and above unit to provide minimum distance from combus-
tible materials, proper airflow, and service access.
Do not install unit in an indoor location. Do not locate
unit air inlets near exhaust vents or other sources of con-
taminated air. For proper unit operation, adequate combus-
tion and ventilation air must be provided in accordance with
Section 5.3 (Air for Combustion and Ventilation) of the
National Fuel Gas Code, ANSI Z223.1 (American National
Standards Institute).
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Locate mechanical draft system flue assembly at least
4 ft from any opening through which combustion products
could enter the building, and at least 4 ft from any adjacent
building. When unit is located adjacent to public walkways,
flue assembly must be at least 7 ft above grade.
ROOF MOUNT — Check building codes for weight distri-
bution requirements. Unit weight is shown in Table 1.
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 econo-
mizer weight.
6. Weights given are for aluminum evaporator coil plate fins and cop-
per condenser coil plate fins. Weights of other metal combinations
are listed in Table 1.
All panels must be in place when rigging.
3
1 ⁄ in. per linear ft in any
16
Instructions continued on page 7.