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Rooftop Installations
If it is necessary to install this unit on a roof structure, ensure
the roof structure can support the weight and that proper con-
sideration is given to the weather-tight integrity ofthe roof. Since
the unit can vibrate during operation, sound vibration transmis-
sion should be considered when installing the unit. Vibration
absorbing pads or springs can be installed between the con-
densing unit legs or frame and the roof mounting assembly to
reduce noise vibration.
Safe Refrigerant Handling
While these items will not cover every conceivable situation,
they should serve as a useful guide.
kWARNING
I
To avoid possible injury, explosion or death, practice I
safe hand ng of refr gerants. I
WARNING
Refrigerants are heavier than air. They can "push out"
the oxygen in your lungs or in any enclosed space.To
avoid possible difficulty in breathing or death:
i ever purge refrigerant into an enclosed room or
space. By law, all refrigerants must be reclaimed.
Ifan indoor leak is suspected, throughly 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 refrig-
erant, as poisonous gas will be produced.
kWARNING
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 re-
frigerant.
Never add anything other than R-22 to an R-22 cy-
linder or 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 cy-
linder as a platform or a roller.
kWARNING
To avoid possible explosion, use only returnable (not
disposable) service cylinders when removing refrig-
erant from a system.
• Ensure the cylinder is free of damage which could
lead to a leak or explosion.
• Ensure the hydrostatic test date does not exceed
5 years.
• Ensure the pressure rating meets or exceeds 400
Ibs.
When in doubt, do not use cylinder.
Refrigerant Lines
CAUTION
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 atmos-
phere any onger than necessary for nsta at on.
Use only refrigerant grade (dehydrated and sealed) copper tub-
ing 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 plumb-
ing, 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 suspending refrigerant tubing from joists and
studs with rigid wire or straps that would come in contact with
the tubing. Use an insulated or suspension type hanger. Keep
both lines separate and always insulate the suction line.
These sizes are suitable for line lengths of 74 feet or less. If a
run of more than fifty feet is required, refer to Remote Cooling
Service Manual, or TP-106 Long Line Set Application R-22, or
TP-107 Long Line Set Application R-410A or contact your dis-
tributor for assistance.
RECOMMENDED INTERCONNECTING TUBING (Ft)
Cond 0-24 25-49 50-74*
Unit Line Diameter (In. OD)
Tons Suct Liq Suct Liq Suct Liq
1 1!2 5!8 1/4 3/4 3!8 3/4 3!8
2 5!8 1/4 3/4 3!8 3/4 3!8
2 1!2 5!8 1/4 3/4 3!8 7!8 3!8
3 3/4 3!8 7!8 3!8 1 1!8 3!8
3 1!2 3/4 3!8 1 1!8 3!8 1 1!8 3!8
4 7!8 3!8 1 1!8 3!8 1 1!8 3!8
5 7!8 3!8 1 1!8 3!8 1 1!8 3!8
* Lines greater than 74 feet in length or vertical elevation changes
more than 50 feet refer to the Remote Cooling Service Manual or
contact your distributor for assistance,
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