Allied Air 4SCU20LX Instrukcja instalacji - Strona 3
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DO LOCATE THE UNIT:
•
With proper clearances on sides and top of unit a
minimum of 12" on the three sides, service side should
be 24" and 48" on top
•
On 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
Indoor Coil TXV Selection
The outdoor section must be matched to a factory approved
indoor section. It is mandatory that the installer ensure
that the correct TXV is installed in the indoor section. If
necessary remove the existing piston and replace it with
the correct TXV. See indoor unit instructions for details of
changing the piston or TXV.
The 20 SEER models are only rated with TXV on the
indoor coil.
Refrigeration Line Sets
Use only refrigeration grade copper tubes. Split systems
may be installed with up to 50 ft. of line set (no more than
20 ft. vertical) without special consideration. For lines
longer than 50 ft., refer to long line set guidelines.
If ANY refrigerant tubing is required to be buried by state
or local codes, provide a 6 inch vertical rise at service
valve.
Model
Liquid Line
24
36
48
60
Do not leave the lines open to the atmosphere for any period
of time, moisture, dirt and bugs may contaminate the lines.
507523-01
CAUTION
20 SEER
Suction Line
3/8
3/4
3/8
7/8
3/8
7/8
3/8
1 1/8
Table 1.
Filter Drier
The filter drier is very important for proper system operation
and reliability. If the drier is shipped loose, it must be
installed by the installer in the field. Unit warranty will be
void, if the drier is not installed.
Installation of Refrigerant Piping
DO NOT fasten liquid or suction lines in direct contact with
the floor or ceiling joist. Use an insulated or suspension
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
foundation or wall and refrigeration lines should be filled
with a vibration damping material.
Before making braze connections, be sure all joints are
clean. Before heat is applied for brazing, dry nitrogen
should be flowing through the tubing to prevent oxidation
and scale formation on the inside of the tubing.
Always cap line set ends before brazing to prevent moisture
and contaminants.
The following is the recommended method for making
braze connections at the refrigerant line connections.
1. Debur and clean refrigerant tube end with emery cloth
or steel brush.
2.
Insert tubing into swage fitting connection.
3.
Wrap wet rags over valves to protect from heat.
4.
Allow dry nitrogen to flow through refrigerant lines.
5.
Braze joint, using a suitable brazing alloy for copper to
copper joints.
6.
Quench the joint and tubing with water using a wet
rag. Leave rag on fitting body and re-wet with water to
help cool area.
7.
All copper joints must be brazed not soldered.
Issue 1831
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