Fig. 2 Ð Horizontal Supply/Return Curb
and Horizontal Adapter Details
ALTERNATE UNIT SUPPORT Ð 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
Step 2 Ð Rig and Place Unit Ð Inspect unit for trans- portation damage. File any claim with transportation agency.
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 ± 1¤16 in. per linear ft in any 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 Ð Maintain clearance, per Fig. 4 and 5, around and above unit to provide minimum distance from combus- tible materials, proper air¯ow, 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 ¯ue 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, ¯ue assembly must be at least 7 ft above grade.
ROOF MOUNT Ð Check building codes for weight distri- bution requirements. Unit weight is shown in Table 1.
Instructions continued on page 7.
UNIT | MAXIMUM SHIPPING | ||
WEIGHT | |||
48HJ | |||
Lb | Kg | ||
| |||
D015 | 1920 | 871 | |
E015 | 1940 | 880 | |
E017 | 2310 | 1048 | |
D025 | 2535 | 1150 | |
Dimension A
UNIT | mm | |
48HJD015 | 949 | |
48HJE015 | 946 | |
48HJE017 | 1035 | |
48HJD025 | 1010 |
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 ®ns and cop- per condenser coil plate ®ns. Weights of other metal combinations are listed in Table 1.
All panels must be in place when rigging.
Fig. 3 Ð Rigging Details
3
