-19-
2) If the line set exceeds 75 ft long, use both inverted U trap and suction
accumulator to prevent liquid from flooding back to the compressor.
3) If the condensing unit is located below the evaporator unit, use inverted U
trap to prevent liquid from flooding back to the compressor. If the elevation
difference is more than 10 ft, use both inverted U trap and suction accumulator.
4) If the condensing unit is located more than 10 ft above the evaporator unit, use
U trap to aid oil returning to the compressor.
5) Complete pipe brazing, check solenoid valve and expansion valve restrictions
and perform leak testing.
6) Hook up the drain line and check if water drains.
6. Water Piping
If a water pump is used, install it before the water inlet so that the condenser
cooling water is fed from the discharge side of the pump.
Model No
Condensing Unit
Water Flow (75°F
inlet
,
gal/min)
Water-in
Connection
Water-out
Connection
Water Pressure
Drop (PSI)
WM-2500SSVWC
WM-250SCUR-WC
0.2
3/8” FPT
1/2" ODF SOLDER
0.2
WM-4500SSVWC
WM-450SCUR-WC
0.4
3/8” FPT
1/2" ODF SOLDER
0.2
WM-6500SSVWC
WM-650SCUR-WC
0.6
3/8” FPT
1/2" ODF SOLDER
0.2
7. Connecting Electrical Wires
Connect all electrical components using the wiring diagrams in accordance with
all state and local codes.
8. Evacuating, Charging and Starting the System
1-Manifold High or Low Pressure Hose; 2-Receiver Discharge or
Compressor Suction Port; 3-Liquid or Suction Line; 4-Pressure Control;
BACK POSITION
FRONT POSITION
MIDDLE POSITION
Fig. 8 ROTALOCK Valve Operation
