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  It may use fan speed control to adjust the system refrigeration 

performance to achieve 8-10

°

F differential between return air and supply 

air. 

In order to control fan speed properly, 

a minimum speed adjustment is required. 
Turn main control knob to lowest speed 
position, locate the setting (on the side or 
front) and adjust minimum speed setting 
with screw driver (rotate clockwise to 
decrease minimum speed; counter-
clockwise to increase minimum speed). 
The fan will run from this preset minimum 
speed to full speed. 

  Suction pressure: 30-35 psig 

  Head pressure: 125-150 psig at 70 -90 

°

F ambient temperatures 

 
The line sizes and refrigerant charges are listed as follows. 
 

MODEL 

REFRIGERATION 

LINES 

LIQUID 

LINE 

SUCTION 

LINE 

DRAIN 

LINE 

CHARGE 

VINO-

1500SSW 

<= 50 FT 

1/4" 

OD 

3/8” OD 

1/2” OD 

R134a/ 

15 OZ 

VINO-

2500SSW 

<= 50 FT 

1/4" 

OD 

3/8” OD 

1/2” OD 

R134a/ 

19 OZ 

 

NOTES: 

 

THE VALVE 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 EVAPORATOR 
UNIT, USE THE SUCTION LINE ONE LISTED SIZE SMALLER. 

 

EXPANSION AND SOLENOID VALVES ARE INSTALLED ON LIQUID LINE. 

 

6.  Pressure, Superheat and Subcooling Readings 

 

CAUTION:  
THE VALVES MUST BE IN THE MIDDLE POSITIONS TO READ PROPERLY. 
 

Complaint Possible 

Causes 

a.  High suction pressure and low head pressure 
b.  High suction pressure and low head pressure 
       Low superheat and low subcooling 
c.  High suction pressure and high head pressure 
       Low superheat and high subcooling 
d.  High to normal suction pressure and high head pressure 
       Low subcooling 
e.  High suction pressure and high head pressure 
       Low subcooling 
f. 

High suction pressure and high head pressure 

      High superheat  

a.  Compressor may be bad 
b.  Expansion valve opened, too 

much oil 

c. Overcharge 
 
d. Non-condensable 

gas 

 
e.  Air restricted, dirty condenser, 

bad condenser fans 

f.  High room temperature, high 

evaporator load 

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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