44 Component Operation and Maintenance
6.4.7 Glycol Cooled Condensers
Brazed Plate Condenser
Each glycol cooled unit has a brazed plate condenser.
Brazed plate condensers do not normally require maintenance or replacement if the fluid supply is
clean. See Section 4.4 in the Installation Manual for further recommendations. If your system oper-
ates at high head pressure with reduced capacity, and all other causes have been eliminated, the con-
denser may be obstructed and needs to be replaced.
The brazed plate condenser will produce liquid subcooling of less than 5°F (3°C) at design conditions.
Regulating Valve
The water regulating valve automatically regulates the amount of fluid 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.
Standard Valve-150psig (1034kPa) & High Pressure Valve-350psig (2413kPa) Systems
Adjustment. The valve may be adjusted with a standard refrigeration service valve wrench or screw
driver. Refer to Table 17 for recommended refrigerant pressures.
To lower the head pressure setting, turn the square adjusting screw clockwise until the high pressure
gauge indicates the desired setting.
To raise the head pressure setting, turn the adjusting screw counterclockwise until the desired set-
ting is obtained.
Manual Flushing. The valve may be flushed by inserting a screwdriver or similar tool under the two
sides of the main spring and lifting. This action will open the valve seat and flush any dirt particles
from the seat. If this fails, it will be necessary to disassemble the valve and clean the seat.
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