RECEIVING AND INSTALLATION
Step 1 Ð Check Equipment
IDENTIFY UNIT Ð The unit model number and serial num- ber are stamped on the unit identi®cation plate. Check this information against shipping papers.
INSPECT SHIPMENT Ð Inspect for shipping damage while unit is still on shipping pallet. If unit appears to be damaged or is torn loose from its anchorage, have it examined by trans- portation inspectors before removal. Forward claim papers directly to transportation company. Manufacturer is not re- sponsible for any damage incurred in transit.
Check all items against shipping list. Immediately notify the nearest Carrier Air Conditioning office if any item is missing.
To prevent loss or damage, leave all parts in original pack- ages until installation.
Step 2 Ð Provide Unit Support
ROOF CURB Ð Install accessory roof curb in accordance with instructions shipped with curb. See Fig. 10. Install in- sulation, cant strips, roo®ng, and ¯ashing. Ductwork must be attached to curb.
IMPORTANT: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasketing material supplied with the roof curb. Improperly ap- plied gasketing also can result in air leaks and poor unit performance.
Curb should be level to within 1¤4 inch. This is necessary for unit drain to function properly. Refer to accessory roof curb installation instructions for additional information as required.
SLAB MOUNT Ð Place the unit on a solid, level concrete pad that is a minimum of 4 in. thick with 2 in. above grade. The slab should extend approximately 2 in. beyond the cas- ing on all 4 sides of the unit. Install a
Step 3 Ð Provide Clearances Ð The required mini- mum service clearances and clearances to combustibles are shown in Fig.
The condenser fan pushes air through the condenser coil and discharges it through louvers on the top cover, the deco- rative grille, and the compressor access panel. Be sure that the fan discharge does not recirculate to the condenser coil. Do not locate the unit in either a corner or under an over- head obstruction. The minimum clearance under a partial over- hang (such as a normal house overhang) is 48 in. above the unit top. The maximum horizontal extension of a partial over- hang must not exceed 48 inches.
Do not restrict condenser air¯ow. An air restriction at either the
Do not place the unit where water, ice, or snow from an overhang or roof will damage or ¯ood the unit. Do not install the unit on carpeting, tile, or other combustible ma- terials. The unit may be installed on wood ¯ooring or on Class A, B, or C roof covering materials.
Step 4 Ð Rig and Place Unit Ð Use spreader bars or crate top when rigging the unit. The units must be rigged for lifting as shown in Fig. 11 and 12. Refer to Fig. 11 and 12 for rigging weights and Tables 1 and 2 for operating weights. Use extreme caution to prevent damage when moving the unit. Unit must remain in an upright position during all rig- ging and moving operations. The unit must be level for proper condensate drainage; the
UNITS WITHOUT BASE RAILS Ð Accessory rigging brack- ets are recommended to be used for rigging. Install brackets as follows:
Secure screws and paint protectors solidly against unit basepan to hold lifting brackets in position.
Never use lifting brackets when the temperature is be- low −10 F (−23 C).
Never exceed 200 lbs per bracket of lifting force.
Never use lifting brackets for lifting other models of air conditioning units.
Lifting point should be directly over the unit center of gravity.
1.Position brackets as close to the corners of unit as pos- sible. Be sure brackets are well outside of center of grav- ity. (See Fig. 2, 4, 6, 8, and 11.)
2.Position paint protectors and foam strips between screws and painted surface of unit. Tighten screws until they make contact with the paint protectors.
3.Secure device or hook of sufficient strength to hole in bracket as shown in detail ``A'' of Fig. 11.
4.If wood top is available, use it for a spreader bar to pre- vent straps from damaging unit. If wood top is not avail- able, use spreader bars of sufficient length.
UNITS WITH OPTIONAL BASE RAILS Ð Keep unit up- right and do not drop. Use spreader bars or top crate when rigging unit. Rollers may be used to move unit across roof. Level unit for proper condensate disposal. See Fig. 3, 5, 7, and 9 for additional information. Lifting holes are provided in base rails as shown in Fig. 12. Refer to rigging instruc- tions on unit.
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