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Page 3 of 11506318-03C mrcool.com
Figure 1.
DO LOCATE THE UNIT:
• With proper clearances on sides and top of unit
• On a solid, level foundation or pad
• To minimize refrigerant line lengths
DO NOT LOCATE THE UNIT:
• On brick, concrete blocks or unstable surfaces
• Near clothes dryer exhaust vents
• Near sleeping area or near windows
• Under eaves where water, snow or ice can fall directly
on the unit
• With clearance less than 2 ft. from a second unit
• With clearance less than 4 ft. on top of unit
Operating Ambient
The minimum outdoor operating ambient in cooling mode
is 55°F, and the maximum outdoor operating ambient in
cooling mode is 125°F. The maximum outdoor operating
ambient in heating mode is 66°F.
Refrigeration Line Sets
Use only refrigerant grade copper tubes. Split systems
may be installed with up to 50 feet of line set (no more than
20 feet vertical) without special consideration (see long
line set guidelines).
It is important that no tubing be cut or seals broken until you
are ready to actually make connections to the evaporator
and to the condenser section. DO NOT remove rubber
plugs or copper caps from the tube ends until ready to
make connections at evaporator and condenser. Under no
circumstances leave the lines open to the atmosphere for
any period of time, if so unit requires additional evacuation
to remove moisture.
Capacity
Liquid Vapor
Connections
Dia.
Tube
Dia.
Connections
Dia.
Tube
Dia.
-018 3/8” 3/8” 3/4” 3/4”
-024 3/8” 3/8” 3/4” 3/4”
-030 3/8” 3/8” 3/4” 3/4”
-036 3/8” 3/8” 7/8” 7/8”
-042 3/8” 3/8” 7/8” 7/8”
-048 3/8” 3/8” 7/8” 7/8”
-060 3/8” 3/8” 7/8” *1-1/8”
* Field supplied 7/8 x 1-1/8 connector required on both ends
of vapor tubing.
Table 1. Recommended Liquid & Vapor Tube
Diameters (in.)
Be extra careful with sharp bends. Tubing can “kink” very
easily, and if this occurs, the entire tube length will have
to be replaced. Extra care at this time will eliminate future
service problems.
It is recommended that vertical suction risers not be up-
sized. Proper oil return to the compressor should be
maintained with suction gas velocity.
Filter Drier
and reliability. If the drier is shipped loose, it must be
void, if the drier is not installed.
Installation of Line Sets
DO NOT fasten liquid or suction lines in direct contact with
type of hanger. Keep both lines separate, and always
insulate the suction line. Long liquid line runs (30 feet or
more) in an attic will require insulation. Route refrigeration
line sets to minimize length.
DO NOT let refrigerant lines come in direct contact with
foundation. When running refrigerant lines through the
foundation or wall, openings should allow for a sound
and vibration absorbing material to be placed or installed
between tubing and foundation. Any gap between
a vibration damping material.
If ANY refrigerant tubing is required to be buried by state
or local codes, provide a 6 inch vertical rise at service
valve.
CAUTION
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