INSTALLATION
LIMITATIONS
These units must be installed in accordance with all national and local safety codes. If no local codes apply, installation must conform with the appropriate national codes. See Table 1 for unit application data. Units are designed to meet National Safety Code Standards. If components are to be added to a unit to meet local codes, they are to be installed at the dealer's and/or the customer's expense.
TABLE 1 - UNIT APPLICATION DATA
APPLICATION LIMITATIONS | MIN | MAX |
Voltage Variation | 187 | 253 |
Voltage Variation | 414 | 506 |
Ambient Air on Outdoor Coil (Cooling Cycle) - °F | 45 | 115 |
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Ambient Air on Indoor Coil (Cooling Cycle) - °F | 68 | 86 |
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Ambient Air on Outdoor Coil (Heating Cycle) - °F | 01 | 70 |
Ambient Air on Indoor Coil (Heating Cycle) - °F | 60 | 80 |
1Rated in accordance with ARI Standard 110, utilization range “A”.
2Below 0 °F, the control circuit will lock out the compressor and allow the electric heat accessory to cycle at its standby capacity.
LOCATION
Use the following guidelines to select a suitable location for these units.
1.The outdoor units must be installed outside the building. The outdoor fans are the propeller type and are not suitable for use with duct work.
2.The outdoor and indoor units should be installed as close together as possible and with a minimum number of bends in the refrigerant piping. Refer to REFRIGERANT PIPING for additional information.
3.The outdoor unit should not be installed beneath windows or between structures where normal operating sounds may be objectionable.
These beams can usually be set directly on the roof. Flashing is not required.
NOTE: On bonded roofs, check for special installation re- quirements.
GROUND LEVEL LOCATIONS
The units must be installed on a substantial base that will not settle. Any strain on the refrigerant lines may cause a refriger- ant leak.
A unit can also be supported by concrete piers. These piers should: (1) extend below the frost line, (2) be located under the unit's four corners and (3) be sized to carry the entire unit weight. Refer to Figure 1 and Table 2 for the center of gravity and unit weight.
A gravel bed or some other means of handling the condensate that will drop from the underside of the unit coil during the heat-
APPRXIMATE |
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ing and defrost cycles may have to be provided. | ||||
CENTEROFGRAVITY |
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| BACK | |
B |
| FRONT | A | |
| Unit | Dim. (in.) |
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| A | B |
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| 15 Ton | 16 | 38 |
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| 20 Ton | 16 | 38 |
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WARNING: The outdoor unit should not be installed in an area where mud and/or ice could cause personal injury. Remember that condensate will drip from the un- derside of the unit coils during heat and defrost cy- cles and that this condensate will freeze when the temperature of the outdoor air is below 32F.
4.All units require certain clearances for proper operation and service.
On either rooftop or ground level installations, rubber padding can be applied between the base rails and their supports to lessen any transmission of vibration.
Be careful not to damage the roof. Consult the building contrac- tor or architect if the roof is bonded. Choose a location with ade- quate structural strength to support the unit.
The unit must be mounted on solid level supports. The sup- ports can be channel iron beams or wooden beams treated to reduce deterioration.
A minimum of two (2) beams are required to support each unit. The beams should: (1) Be positioned perpendicular to the roof joists. (2) Extend beyond the dimensions of the unit to distribute the load on the roof, (3) Be capable of adequately supporting the entire unit weight. Refer to Figure 1 and Table 2 for load dis- tribution and weights.
FIG. 1 - CENTER OF GRAVITY
CAUTION: Care should be taken to protect the unit from tampering and unauthorized persons from injury. Screws on access panels will prevent casual tampering. Additional safety precautions such as fences around the unit or locking devices on the panels may be advisable. Check local authori- ties for safety regulations.
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove any pack- aging until the unit is near the place of installation.
Rig the unit by attaching chain or cable slings with hooks to the round lifting holes provided in the base rails.
CAUTION: Spreaders, longer than the largest dimension across the unit, MUST be used across the top of the unit. See Figure 2.
WARNING: BEFORE LIFTING A UNIT, MAKE SURE THAT ITS WEIGHT IS DISTRIBUTED EQUALLY ON THE CABLES SO THAT IT WILL LIFT EVENLY.
Units may also be moved or lifted with a
Unitary Products Group | 3 |
