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Glycol/GLYCOOL-Cooled Models—Self-Contained Compressor
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5.5.4 Motor Ball Valve—Digital Scroll Compressors
Refer to 4.4 - Motorized Ball Valve—Digital Scroll Compressors for details on the motorized ball
valve.
5.6 Condenser
The condenser is designed to operate in conjunction with a drycooler. The maximum coolant pressure
is 350 psig (2413 kPa).
5.7 Glycol Regulating Valve
The glycol regulating valve automatically regulates the amount of coolant necessary to remove the
heat from the refrigeration system, permitting more fluid to flow when load conditions are high and
less fluid to flow when load conditions are low. The valve consists of a brass body, balance spring,
valve seat, valve disc holders, capillary tube to discharge pressure, and adjusting screw.
5.7.1 Standard Valve - 150psig (1034kPa) System for 3 & 5-Ton Units (Johnson Controls Valve)
High Pressure Valve - 350psig (2413kPa) System for 5-Ton Units (Johnson Controls Valve)
For details, refer to 4.3.1 - Standard Valve - 150psig (1034kPa) System for 3 & 5-Ton Units
(Johnson Controls Valve) High Pressure Valve - 350psig (2413kPa) System for 5-Ton Units
(Johnson Controls Valve).
5.7.2 High Pressure Valve - 350 psig (2413 kPa) System for 3-Ton Units (Metrex Valve)
For details, refer to 4.3.2 - High Pressure Valve - 350 psig (2413 kPa) System for 3-Ton Units
(Metrex Valve).
5.7.3 Testing Valve Function
When the refrigeration system has been off for approximately 10-15 minutes, the coolant flow should
stop.
Should the coolant continue to flow, the valve is either improperly adjusted (head pressure is too low)
or the pressure sensing capillary is not connected properly to the condenser.
Table 20 Refrigerant control settings psi (kPa)
Low Pressure
Cut Out
Low Pressure
Cut In
High Pressure
Cut Out
20 (137.9) 65 (448.2) 400 (2758)