EMI CAC_36, Инструкция по установке, эксплуатации и обслуживанию

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11 Cassette Air Handler
pIpINg dO’S ANd dON’TS
• Avoid piping on a rainy day.
• Use refrigerant grade copper tubing.
• Use a tubing bender and avoid unneces
-
sary bending.
• Cap ends of lines until ready for final
connections.
Once the unit is mounted and level the Cassette piping connections can be made.
Any change in the diameter of the tubing
MUST be
made at the indoor connection
. Line-set diam
-
eter is determined by the condenser valve size
.
Use of a larger line can harm
the compressor!
When matching a the Cassette 24 with an
18,000 Btuh condenser, the interconnecting
suction line needs to be 5/8” O.D. to match
the condenser service valve connection.
Therefore the 3/4” O.D. suction connection
of the Cassette 24 unit needs to be reduced
to 5/8” at the Cassette 24 unit connection to
match the 5/8” line of the condenser.
5/8” bushing goes on suction line
(Only when matched to an 18,000 btuh condenser)
NOTE:
Refrigerant and condensate pipes
should be insulated right up to the Cassette
chassis.
The Cassette is equipped with a Flo-
Rater/Piston Expansion device. Connec
-
tions are sweat type.
The suction line (large) must be insulated
the entire length with closed cell, foam tube
insulation. Do not insulate the liquid line
(small). Connect the outdoor unit according
to the instructions supplied with unit.
All horizontal piping runs
should be without dips to trap
the oil and slightly inclined, so
as to encourage oil flow in the
direction of the compressor.
Suction line
liquid line
REfRIgERATION pIpINg
pIpE INSTALLATION NOTES
1. Maximum equivalent pipe run should be no
more than 100’ (30.5m), with a maximum
rise of 35’ (10.7m).
2. Horizontal pipe runs should be slightly inclined,
so as to encourage oil to flow in the direction
of the compressor, for better oil return.
3. Good refrigeration practices must be em-
ployed to ensure the correct pressure drop
and good oil return.
2. Cut the black insulation around the
knock-out.
3. Snip the tabs holding the knock-out
in place.
4. Remove the metal knock-out and
the black insulation behind it.
5. Attach the duct collars (field sup
-
plied) to the chassis using self tap
-
ping screws. (Repeat steps 1-5 for
remaining duct work.)
CAHB24
CONdENSATE pIpINg ANd dUCT CONNECTIONS