INSTALLATION
LIMITATIONS
These units must be installed in accordance with the current editions of the following national and local safety codes:
In the U.S.A.:
1.National Electrical Code ANSI/NFPA No. 70.
2.National Fuel Gas Code Z223.1.
3.
4.Local gas utility requirements.
In Canada:
1.Canadian Electrical Code CSA C22.1
2.Current Gas Installation Codes
3.Local plumbing and waste water codes.
4.Other applicable local codes.
Refer to Table 1 for Unit Application Data and to Table 2 for Gas Heat Application Data.
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).
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 accumulation. Check the local weather bureau for the expected snow accumulation in your area.
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.
TABLE 1 - UNIT APPLICATION DATA
UNIT SIZE |
| 036 | 048 | 060 | 072 | |
Voltage Variation | 208/230V |
| 187 / 253 |
| ||
| 460V |
| 414 / 504 |
| ||
Min. / Max.1 |
|
|
| |||
| 575V |
| 518/630 |
| ||
|
|
|
| |||
Supply Air CFM, Nom. |
| 1200 | 1600 | 2000 | 2400 | |
Wet Bulb Temperature (°F) of | 57 / 72 | 57 / 72 | 57 / 72 | 57 / 72 | ||
Air on Evaporator Coil, |
| |||||
Min. / Max. |
|
|
|
|
| |
Dry Bulb Temperature (°F) of | 45 / 120 | 45 / 120 | 45 / 120 | 45 / 120 | ||
Air on 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 coils must have an unlimited supply of air. Where a choice of location is possible, position the unit on either north or east side of building.
WARNING: Excessive exposure of this furnace to contami- nated combustion air may result equipment dam- age or personal injury. Typical contaminates include: permanent wave solutions, chlorinated waxes and cleaners, chlorine based swimming pool chemicals, water softening chemicals, carbon tetrachloride, Halogen type refrigerants, cleaning solvents (e.g. perchloroethylene), printing inks, paint removers, varnishes, hydrochloric acid, ce- ments and glues, antistatic fabric softeners for clothes dryers, masonry acid washing materials.
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.
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.
CAUTION: An adhesive backed label is provided over the outside of the combustion air inlet opening to pre- vent moisture from entering the unit which could cause damage to electrical components. Allow this closure label to remain in place until the combus- tion air hood is to be installed (refer to Figure 5).
Refer to Table 5 for unit weights and to Figure 8 for approximate center of gravity.
CLEARANCES
All units require certain clearances for proper operation and service. Installer must make provisions for adequate combustion and ventilation air in accordance with Section 5.3, Air for Combustion and Ventilation of the National Fuel Gas Code, ANSI Z223.1 (in U.S.A.) or Sections 7.2, 7.3 or 7.4 of Gas Installation Codes
WARNING: Do not permit overhanging structures or shrubs to obstruct condenser air discharge outlet, combustion air inlet or vent 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.
Unitary Products Group | 3 |
