Filter
Top Products
www.enviromaster.com
8
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
pressure readings. The following precau-
tions should be made:
INTERCONNECTING TUBING
SPECIFICATIONS
Model
MAX.
Length
Max.
Lift
Liquid
Line O.D.
Suction
Line O.D.
9900 100’ 35’ 1/4" 1/2"
2200 100’ 35’ 1/4" 1/2"
9200 100’ 35’ 1/4" 1/2"
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 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.
P-TRAP INSTALLATION
30’
15’
Evaporator
or
Condenser
Evaporator
or
Condenser
Figure #1
• 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.