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Service Instructions
1. Service Valve Operations
BACK POSITION FRONT POSITION MIDDLE POSITION
Fig. 7 ROTALOCK Valve Operation
BACK POSITION FRONT POSITION MIDDLE POSITION
Fig. 8 Base Valve Operation
1 - Process & Manometer; 2 – Receiver Discharge or Compressor Suction
3 – Liquid Line or Suction Line; 4 - Pressure Control
Back Position
: Normal operation, process and manometer port closed
Front Position
: Liquid/suction line connection closed
Middle Position
: All ports open for evacuation, charge and manometer reading
2.
Checking Control Settings
1)
Use of the adjustable pressure control
Suction pressure setting: Cut out=5 psig; Cut in=25 psig; Differential=20 psig
Head pressure setting: Cut out=230 psig; Cut in=150 psig; Differential=80 psig
It may need to adjust the setting in the field to get the right cycle time.
