EMI Corp Manual page 8

REFRIGERANT PIPING INSTALLATION SECTION
INTERCONNECTING TUBING
SPECIFICATIONS
MAX. Max.
Model
Length Lift
9900 100'
2200 100'
9200 100'
The system will support refrigerant runs
to the inside unit of up to 100' equivalent
feet with a 35' rise included. The units
are furnished with sweat connections and
are equipped with refrigerant valves and
Schrader fittings for charging and taking
pressure readings. The following precau-
tions should be made:
• A P-trap is recommended when the suc-
tion riser is equal to or greater than 20
feet in height.
• When the condenser is installed above
the evaporator, the P-trap will help the
return of oil back to the compressor.
• The placement of the P-trap should be at
the halfway mark of the suction riser. For
example if the suc-
tion riser is 30 feet tall
then a P-trap is recom-
mended at the 15 foot
mark of the suction
riser (see Figure #1).
• A P-trap may be fabri-
cated using;
(2) street elbows and
(2) regular elbows. A
prefabricated trap
may be purchased
from a Wholesaler
Multi-zone Heat Pump Condensing Units
Liquid Suction
Line O.D. Line O.D.
35' 1/4"
35' 1/4"
35' 1/4"
P-TRAP INSTALLATION
30'
• Be certain no burrs remain on the
fittings.
• Use only clean refrigeration tubing.
• Use tube benders to guard against
1/2"
kinking.
1/2"
• Avoid piping on wet and rainy days
1/2"
and insulate suction line. Be certain
that plastic end caps remain in place
when inserting through wall openings.
Isolate tubing from transmitting vibra-
tion to the building or unit and avoid
contact with sharp edges. Refrigera-
tion valves should be wrapped with
a wet rag "heat sink" to protect
valves while brazing.
or Distributor however the trap should
be shallow as the:
(4) elbow configuration. Each elbow is
approximately 2 equivalent feet. One
P-trap is equal to approximately 8
equivalent feet.
Figure #1
Evaporator
or
Condenser
15'
8
Evaporator
or
Condenser
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