INSTALLATION
LIMITATIONS
These units must be installed in accordance with national and local or municiple safety codes: Refer to Table 1 for Unit Application Data.
If components are to be added to a unit to meet local codes, they
TABLE 1 - UNIT APPLICATION DATA
Voltage Variation | 342 / 457 | |
Min. / Max. | ||
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| Wet Bulb Temperature of Air | °C | 14 / 22 | ||
Cooling | on Indoor Coil, Min./Max. | °F | 57 / 72 | ||
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Dry Bulb Temperature of Air | °C | 7 | / 49 | ||
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| on Outdoor Coil, Min./Max. | °F | 45 | / 120 | |
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Heating | Minimum Dry Bulb Temperature | °C | |||
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| of Air on Outdoor Coil | °F | |||
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are to be installed at the dealer's and / or the customer's expense.
LOCATION
Use the following guidelines to select a suitable location for these units.
1.Unit is designed for outdoor installation only.
2.Outdoor coil must have an unlimited supply of air.
3.For ground level installation, use a level concrete slab with a minimum thickness of 102mm (4 in.). The length and width should be at least 152mm (6 in.) greater than the unit base rails. Do not tie 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 toallsurfacesthatcomeincontactwiththeunitunderside.
5.Maintain level tolerance to 13mm (
12in.) 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.
OUTDOOR COILCONDENSATE DRAINAGE PRECAUTION
Condensate drains from the outdoor coil during the heating and defrost cycles. Normally this condensate may be allowed to drain directly onto the ground/roof. A gravel bed is recommended to prevent mud splashing.
WARNING: The unit should not be installed in an area where mud or ice could cause personal injury. Remember that condensate drips from the outdoor coil during heat and defrost cycles and that this condensate freezes when the temperature of the outdoor air is below 0°C (32F).
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 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 1067mm (42 in.).
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 BACKon the unit. CONDENSER
COIL END
APPROXINATE
CENTER OF
GRAVITY
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| 401 | 3534 | 82208914 |
44114078 | 1950234 | “ | “ |
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FIG. 1 - CENTER OF GRAVITY
Refer to Table 3 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 6 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
A closed return duct system shall be used. This does 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 airflow 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 6 for information concerning side and bottom supply and return air duct openings.
FILTERS
Each unit is supplied with 25mm (1 in.) filters . Replacement 51mm (2 in.) filters may be used without modification to the filter racks. Filters must always be installed ahead of the evaporator coil and must be kept clean or replaced with same
Unitary Products Group | 3 |
