Vinotemp Refrigerator 250SCU User Manual

VINO-1500SSW  
VINO-2500SSW  
Installer’s Instruction  
Federal law requires that WINE-MATE split cooling systems be  
installed by an EPA certified refrigeration technician.  
WINE-MATE split system is shipped as components and is ready for use only  
after a certified refrigeration technician has properly installed, charged and tested  
the system. Proper installation is critical. Vinotemp can only warrant the quality of  
the components. The installation and proper operation of the system must be  
warranted by the installer. Installation of the system must be done in accordance  
with all state and local building codes.  
The condensing unit and evaporator unit are connected by 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, the system must be pressure tested. If no leaks are found,  
evacuate and charge system with R134A. Refrigerant amount will vary  
depending on the length of line set.  
1. Condensing Unit  
Place the condensing units WM-150SCU and 250SCU in a properly  
ventilated location. If it is not, heat exhausted by the condensing unit will  
build up and the cooling system will not operate properly.  
Leave minimum 5 feet clearance for the exhaust side and leave minimum  
1 foot clearance for the fresh air intake side.  
Condensing unit shall be elevated to avoid possible flooding and shaded  
from direct sun. It shall not be exposed to temperatures higher than 110  
°F or lower than 45 °F (optional low ambient kit for 20 °F).  
2. Evaporator Unit  
 
5. Pressure, Superheat and Subcooling Readings  
NOTES: THE VALVES MUST BE IN THE MIDDLE POSITIONS TO READ  
PROPERLY.  
Complaint  
Possible Causes  
a. Compressor may be bad  
b. Expansion valve opened, too  
much oil  
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  
c. Overcharge  
d. High to normal suction pressure and high head pressure d. Non-condensable gas  
Low subcooling  
e. High suction pressure and high head pressure  
Low subcooling  
f. High suction pressure and high head pressure  
High superheat  
e. Air restricted, dirty condenser,  
bad condenser fans  
f. High room temperature, high  
evaporator load  
g. Low suction pressure and low head pressure  
High superheat and low subcooling  
g. Undercharge  
h. Low suction pressure and low to normal head pressure  
High superheat and high subcooling  
h. Liquid line restricted after  
receiver,  
restricted  
solenoid  
valve  
i. Low suction pressure and low head pressure  
Low subcooling  
i. Suction line restricted  
j. Low suction pressure and low head pressure  
Low superheat and low subcooling  
j. Air restricted at evaporator,  
evaporator iced  
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  
k. Evaporator restricted  
l. Expansion valve restricted  
m. Low suction pressure and high head pressure  
High superheat and high subcooling  
m. Both evaporator and condenser  
restricted  
n. Low suction pressure and high head pressure  
High superheat and high subcooling  
n. Liquid line restricted before  
receiver  
o. low to normal suction pressure and high head pressure  
High to normal superheat and high subcooling  
o. Condenser restricted  
6. Valve Operation  
SPINDLE BACK POSITION SPINDLE FRONT POSITION SPINDLE MIDDLE POSITION  
Fig. 2.1 Valve Operation  
- 2 -  
 
Back Position: Process and manometer port closed for normal operation  
Front Position: Main connection to liquid or suction line closed  
Middle Position: All ports open for vacuum, charge and measurement  
7. Electrical Wiring  
Fig. 2.2 VINO1500-2500SSW Wiring Diagram (DIGITAL CONTROLLER)  
- 3 -  
 
8. Use of the adjustable low pressure control (if applicable)  
Cut out = 5 psig; Cut in = 25 psig; Differential = 20 psig  
It may need to adjust the setting in the field to get the right cycle time.  
Fig. 2.3 Adjustable Pressure Control  
9. Condensing Unit Troubleshooting  
Unit not running  
a. Incorrect power supply  
b. Incorrect or loose wirings  
c. Failed components  
a. Check for proper voltage  
b. Check all wirings and connections  
c. Check start relay, start capacitor, overload  
protector, compressor.  
d. Liquid refrigerant in the compressor  
d. Call service for OEM information  
e. Low pressure switch shutting down the system e. Check for system restriction or low  
refrigerant  
- 4 -  
 

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