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PA4G: Installation Instructions
1. Application of the lifter to the load, and adjustment of the lifts to
adapt to various sizes or kinds of loads.
2. Instruction in any special operation or precaution.
3. Condition of the load as it relates to operation of the lifting kit, such
as balance, temperature, etc.
Follow all applicable safety codes. Wear safety shoes and work gloves.
A
B
A-B
(6.35)
1/4
Fig. 6 – Unit Leveling Tolerances
Inspection
Prior to initial use, and at monthly intervals, all rigging shackles, clevis
pins, and straps should be visually inspected for any damage, evidence
of wear, structural deformation, or cracks. Particular attention should be
paid to excessive wear at hoist hooking points and load support areas.
Materials showing any kind of wear in these areas must not be used and
should be discarded.
WARNING
!
UNIT FALLING HAZARD
Failure to follow this warning could result in personal injury or death.
Never stand beneath rigged units or lift over people.
1. Leave top shipping skid on the unit for use as a spreader bar to
prevent the rigging straps from damaging the unit. If the skid is not
available, use a spreader bar of sufficient length to protect the unit
from damage.
WARNING
!
PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal injury.
When straps are taut, the clevis should be a minimum of 36 in. (914
mm) above the unit top cover.
Rigging/Lifting of Unit (See
WARNING
!
UNIT FALLING HAZARD
Failure to follow this warning could result in personal injury or death.
Large base units must be secured to common curb before allowing full
weight of unit to rest on curb. Install screws through curb into unit base
rails while rigging crane is still supporting unit.
Lifting holes are provided in base rails as shown.
1. Attach shackles, clevis pins, and straps to the base rails of the unit.
Be sure materials are rated to hold the weight of the unit (See
Fig.
5).
2. Attach a clevis of sufficient strength in the middle of the straps.
Adjust the clevis location to ensure unit is lifted level with the
ground.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
C
MAXIMUM ALLOWABLE
DIFFERENCE in. (mm)
B-C
A-C
(6.35)
(6.35)
1/4
1/4
A07925
Fig.
5)
After the unit is placed on the roof curb or mounting pad, remove the top
skid.
OPTIONAL
RETURN
AIR
OPENING
(50.8mm)
EVAP. COIL
Fig. 7 – Slab Mounting Detail
Step 6 – Connect Condensate Drain
NOTE: When installing condensate drain connection be sure to comply
with local codes and restrictions.
Unit disposes of condensate water through a 3/4 in. NPT fitting which
exits through the base on the evaporator coil access side. See
Fig. 3
for location.
Condensate water can be drained directly onto the roof in rooftop
installations (where permitted) or onto a gravel apron in ground level
installations. Install a field-supplied 2-in. (51 mm) condensate trap at
end of condensate connection to ensure proper drainage. Make sure that
the outlet of the trap is at least 1 in. (25 mm) lower than the drain pan
condensate connection to prevent the pan from overflowing (See
When using a gravel apron, make sure it slopes away from the unit.
Connect a drain tube using a minimum of 3/4 -in. PVC or 3/4 -in. copper
pipe (all field-supplied) at the outlet end of the 2-in. (51 mm) trap. Do
not undersize the tube. Pitch the drain tube downward at a slope of at
least 1-in. (25 mm) for every 10 ft (3.1 m) of horizontal run. Be sure to
check the drain tube for leaks. Prime trap at the beginning of the cooling
season start-up.
1-in. (25 mm) min.
Fig. 8 – Condensate Trap
Step 7 – Install Duct Connections
The design and installation of the duct system must be in accordance
with the standards of the NFPA for installation of non-residence type air
conditioning and ventilating systems, NFPA 90A or residence type,
NFPA 90B and/or local codes and ordinances.
Select and size ductwork, supply-air registers, and return air grilles
according to ASHRAE (American Society of Heating, Refrigeration,
and Air Conditioning Engineers) recommendations. The unit has duct
flanges on the supply- and return-air openings on the side of the unit.
When designing and installing ductwork, consider the following:
1. All units should have field-supplied filters or accessory filter rack
installed in the return-air side of the unit. Recommended sizes for
filters are shown in
Table
2. Avoid abrupt duct size increases and reductions. Abrupt change in
duct size adversely affects air performance.
7
OPTIONAL
SUPPLY
AIR
OPENING
COND. COIL
Fig. 2
TRAP
OUTLET
2-in. (51 mm) min.
1.
A07926
and
Fig.
8).
A09052
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