31
Action R 410 R 407C
Cut-out (Open) 575 PSI
450 PSI
Cut-in (Close) Manual Reset
Manual Reset
5.6.3 Low Pressure Cutout Switch
Each refrigerant circuit has a low pressure cutout switch (non-adjustable) which features SPST open-
low switch action and automatic reset. The switch is typically located in the evaporator near the
compressor. The low pressure switch rating is:
Action R 410 R 407C
Cut-out (Open) 50 PSI 30 PSI
Cut-in (Close) 90 PSI 50 PSI
5.6.4 Liquid Line Solenoid Valve (Optional)
Liquid line solenoid valve(s) (LLVS) are an option available for this unit. The LLSV are direct acting, NC
(normally closed; i.e. closed when de-energized) solenoid operated valve(s). This has the advantage
that the valve is closed when the system is not running and when the solenoid valve is not energized.
For this reason, an electrical power failure does not lead to any problems with the refrigeration system.
The primary purpose of a solenoid valve in a refrigerant liquid line is to helps prevent refrigerant migration
(i.e., ow into the evaporator) during the OFF cycle.
To Next Page
Loading...
