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Rigging
To avoid possible injury or death, all panels must be in
position and secured before lifting this equipment.
Use field-supplied spreader bars when lifting the unit to
minimize the possibility of lifting cable/straps damage. To
protect the cabinet louvers, use protective material such as
plywood behind the cable/straps. Arrange the straps to form
a central suspension point. NOTE: When raising and setting
the unit, observe all safety rules. Remove shipping skid and
all protection and lifting material after the unit is in place.
Safe Refrigerant Handling
While these items will not cover every conceivable
situation, they should serve as a useful guide.
PARTIAL UNITS SHALL ONLY BE CONNECTED TO APPLIANCE
SUITABLE FOR THE SAME REFRIGERANT.
Refrigerants are heavier than air. They can "push out"
the oxygen in your lungs or any enclosed space. To avoid
possible difficulty in breathing or death:
• Never purge refrigerant into an enclosed room or
space. By law, all refrigerants must be reclaimed.
• If an indoor leak is suspected, thoroughly ventilate the
area before beginning work.
• Liquid refrigerant can be very cold. To avoid possible
frostbite or blindness, avoid contact and wear gloves
and goggles. If liquid refrigerant does contact your
skin or eyes, seek medical help immediately.
• Always follow EPA regulations. Never burn refrigerant,
as poisonous gas will be produced.
WARNING
WARNING
WARNING
To avoid possible explosion:
• Never apply flame or steam to a refrigerant cylinder. If
you must heat a cylinder for faster charging, partially
immerse it in warm water.
• Never fill a cylinder more than 80% full of liquid
refrigerant.
• Never add anything other than R-410A to an R-410A
cylinder. The service equipment used must be listed or
certified for the type of refrigerant used.
• Store cylinders in a cool, dry place. Never use a
cylinder as a platform or a roller.
To avoid possible explosion, use only returnable (not
disposable) service cylinders when removing refrigerant
from a system.
• Ensure the cylinder is free of damage which could lead
to a leak or explosion.
• Ensure the hydrostatic test date doe not exceed 5
years.
• Ensure the pressure rating meets or exceeds 400 PSIG.
When in doubt, do not use a cylinder.
The compressor POE oil for R-410A units is extremely
susceptible to moisture absorption and could cause
compressor failure. Do not leave system open to
atmosphere any longer than necessary for installation.
Refrigerant Lines
NOTE: For improved refrigerant management,
equip the evaporator coil with a field-supplied
thermal expansion valve (TXV) and the liquid line
with a field-supplied liquid line solenoid if not
already supplied with the air handler. Ensure
the solenoid is installed as close as possible
to the evaporator coil to prevent refrigeration
migration in the compressor "OFF" cycle.
The maximum allowable pressure shall be
considered when connecting to a condenser or
evaporator unit.
Use only refrigerant grade (dehydrated and sealed)
copper tubing to connect the condensing unit with the
indoor evaporator. After cutting the tubing, install plugs to
keep refrigerant tubing clean and dry prior to and during
installation. Tubing should always be cut square keeping
ends round and free from burrs. Clean the tubing to
prevent contamination.
Do NOT let refrigerant lines come in direct contact with
plumbing, ductwork, floor joists, wall studs, floors, and
walls. When running refrigerant lines through a foundation
or wall, openings should allow for sound and vibration
absorbing material to be placed or installed between tubing
and foundation. Any gap between foundation or wall and
refrigerant lines should be filled with a pliable silicon-
based caulk, RTV or a vibration damping material. Avoid
3
WARNING
WARNING
CAUTION
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