INSTALLATION
LIMITATIONS
These units must be installed in accordance with the current edition of the following national and local safety codes:
In USA:
1.National Electrical Code ANSI/NFPA No. 70.
2.Local electric utility requirements.
In Canada:
1.Canadian Electrical Code C22.1.
2.Canadian Installation Codes
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.
Size of unit for proposed installation should be based on heat loss / heat gain calculation made according to the methods of Air Conditioning Contractors of America (ACCA).
TABLE 1 - UNIT APPLICATION DATA
Voltage Variation |
| 208/230V | 187 | / 253 | |
| 460V | 414 | / 504 | ||
Min. / Max.1 |
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| 575V | 518 | / 630 | ||
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Wet Bulb Temperature (°F) of Air on | 57 | / 72 | |||
Evaporator Coil, | Min. / Max. | ||||
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Dry Bulb Temperature (°F) of Air on | 45 / 120 | ||||
Condenser Coil, | Min.2 / Max. | ||||
1Utilization range “A” in accordance with ARI Standard 110.
2A low ambient accessory is available for operation down to 0°F
LOCATION
Use the following guidelines to select a suitable location for these units.
1.Unit is designed for outdoor installation only.
2.Condenser must have an unlimited supply of air. Where a choice of location is possible, position unit on either north or east side of building.
3.For ground level installation, a level pad or slab should be used. The thickness and size of the pad or slab used should meet local codes and unit weight. Do not tie the slab to the building foundation.
4.Roof structures must be able to support the weight of the unit and its options and / or accessories. Unit must be installed on a solid level roof curb or appropriate angle iron frame.
CAUTION: If a unit is to be installed on a roof curb or special frame other than a YORK roof curb, gasketing must be applied to all surfaces that come in contact with the unit underside.
5.Maintain level tolerance to 1/2" maximum across the entire length or width of the unit.
6.Elevate the unit sufficiently to prevent any blockage of the air entrances by snow in areas where there will be snow ac- cumulation. Check the local weather bureau for the ex- pected snow accumulation in your area.
unit by attaching chain or cable slings to the lifting holes provided in the base rails. Spreaders, whose length exceeds the largest dimension across the unit, MUST be used across the top of the unit.
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 forklift. Slotted openings in the base rails are provided for this purpose.
LENGTH OF FORKS MUST BE A MINIMUM OF 42".
Remove the nesting brackets from the four corners on top of the unit. All screws that are removed when taking these brackets off must be replaced on the unit.
APPROXIMATE
CENTER OF
GRAVITY
FRONT
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A | B | Dim. | ||
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| A | |
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FIG. 1 - CENTER OF GRAVITY
Refer to Table 2 for unit weights and to Figure 1 for approximate center of gravity.
CLEARANCES
All units require certain clearances for proper operation and service. Refer to Figure 5 for the clearances required for combustible construction, servicing, and proper unit operation.
WARNING:Do not permit overhanging structures or shrubs to obstruct outdoor air discharge outlet.
DUCTWORK
Ductwork should be designed and sized according to the methods in Manual Q of the Air Conditioning Contractors of America (ACCA).
A closed return duct system shall be used. This shall not preclude use of economizers or outdoor fresh air intake. The supply and return air duct connections at the unit should be made with flexible joints to minimize the transmission of noise.
The supply and return air duct systems should be designed for the CFM and static requirements of the job. They should NOT be sized to match the dimensions of the duct connections on the unit.
CAUTION: When fastening ductwork to the side duct flanges on the unit, insert the screws through the duct flanges only. DO NOT insert the screws through the casing.
Outdoor ductwork must be insulated and water- proofed.
Refer to Figure 5 for information concerning side and bottom supply and return air duct openings.
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove any packaging until the unit is near the place of installation. Rig the
FILTERS
1" filters are supplied with each unit. 2" replacement filters may be used with no modification to the filter racks. Filters must always be installed ahead of the evaporator coil and must be
Unitary Products Group | 3 |
