-20-
BACK POSITION
FRONT POSITION
MIDDLE POSITION
Fig. 9 Base Valve Operation
Back Position
: Normal operation, manifold port is closed.
Front Position
: Storage operation, liquid or suction line connection is closed.
Middle Position
: Installation operation, all ports are open.
NOTE
The recommended initial charges are used for reference only, always
use the superheat, subcooling and pressure readings to charge
refrigerant properly.
1) Turn both discharge and suction valves in the middle positions.
2) Connect the manifold high or low pressure hose to the discharge or suction
valve and connect it to a vacuum pump.
3) Open the manifold high and low pressure valves to evacuate the system.
4) Close the manifold high and low pressure valves and switch it to a charging
scale.
5) Open the manifold high and low pressure valves to charge the system using
the recommended initial charge.
6) Close the manifold high and low pressure valves.
7) Turn on the water valve.
8) Turn on the power to start the system.
9) Check the following temperatures and pressures.
9. Adjusting and Completing the Installation
1) Set the water regulating valve opening set-point at refrigerant pressure of
120 PSIG. Turn counterclockwise to raise the operating set-point.
