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g.  Low suction pressure and low head pressure 
      High superheat and low subcooling 
h.  Low suction pressure and low to normal head pressure 
      High superheat and high subcooling 
 
i. 

Low suction pressure and low head pressure 

      Low subcooling 
j. 

Low suction pressure and low head pressure 

      Low superheat and low subcooling 
k.  Low suction pressure and low to normal head pressure 
      High superheat and normal to high subcooling 
l. 

Low suction pressure and normal head pressure 

      High superheat and normal subcooling 
m.  Low suction pressure and high head pressure 
      High superheat and high subcooling 
n.  Low  suction pressure and high head pressure 
       High superheat and high subcooling 
o.  low to normal suction pressure and high head pressure 
       High to normal superheat and high subcooling 
 

g. Undercharge 
 
h. Liquid line restricted after 

receiver, solenoid valve 
restricted 

i. 

Suction line restricted 

 
j.  Air restricted at evaporator, 

evaporator iced 

k. Evaporator 

restricted 

 
l. 

Expansion valve restricted  

 
m.  Both evaporator and condenser 

restricted 

n. Liquid line restricted before 

receiver 

o. Condenser 

restricted 

 

 

7. 

Use of the adjustable pressure control (if applicable for pump-down)

 

 
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. 
 

A. Single Control 

 

Fig. 3 Single Adjustable Pressure Control 

 
 
 
 
 

Summary of Contents for WINE-MATE 250SCU

Page 1: ...a liquid line and an insulated suction line that are supplied by the installer These lines must be properly sized for the distance between the two units After the units and the lines are installed th...

Page 2: ...ion 1 Process Manometer 2 Receiver Compressor Suction 3 Liquid Suction Line 4 Pressure Control Back Position Process and manometer port closed for normal operation Front Position Connection to liquid...

Page 3: ...evaporator unit including liquid line connection solenoid valve expansion valve and suction line connection returning to insulated suction line suction valve and then condensing unit Use inverted siph...

Page 4: ...CONNECTION SIZES OF CONDENSING UNIT AND THE LINE CONNECTION SIZES OF EVAPORATOR UNIT ARE NOT NECESSARY THE SAME AS THE ABOVE SPECIFIED LINE SIZES IF THE CONDENSING UNIT IS INSTALLED ABOVE THE EVAPORAT...

Page 5: ...pressure High superheat and high subcooling o low to normal suction pressure and high head pressure High to normal superheat and high subcooling g Undercharge h Liquid line restricted after receiver...

Page 6: ...n 170 psig Cut out 120 psig Differential 50 psig It may need to adjust the setting in the field to prevent short fan cycle 10 Use of the crankcase heater if applicable for low ambient kit The crankcas...

Page 7: ...led components d Liquid refrigerant in the compressor e Low pressure switch shutting down the system a Check for proper voltage b Check all wirings and connections c Check start relay start capacitor...

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