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10
Multi-zone Heat Pump Condensing Units
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
S2HA & T2HA REFRIGERANT PIPING INSTALLATION SECTION
• 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 or Distributor how
-
ever 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.
P-TRAP INSTALLATION
30’
15’
Evaporator
or
Condenser
Evaporator
or
Condenser
Figure #1
pressure readings. The following precau-
tions should be made:
• Be certain no burrs remain on the
fittings.
• Use only clean refrigeration tubing.
• Use tube benders to guard against
kinking.
• Avoid piping on wet and rainy days
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.
INTERCONNECTING TUBING SPECS
S2HA, T2HA, T3HA, & T4HA models:
Nominal
Circuit
Capacity
Maximum
Length
Maximum
Lift
Liquid
Line
OD
Suction
Line
OD
9,000 100’ 35’ 1/4” 1/2”
12,000 100’ 35’ 1/4” 1/2”
18,000 100’ 35’ 3/8” 5/8”
24,000 100’ 35’ 3/8” 3/4”
NOTE: Refrigerant Piping Installation for both the S2HA & T2HA models.