Page 42 | 1-800-343-9463
WCM
033114
INSTALLING THE CONDENSING UNIT
FINALIZING THE INSTALLATION
Evacuation
•
Remove the nitrogen tank from the manifold and attach the manifold to the refrigerant tank.
•
Install a micron gauge onto the access valve near the evaporator unit (fan coil unit).
•
Mid seat both service valves.
•
Install service caps on the valves.
•
Energize the liquid line solenoid valve.
•
After confirming there is fresh oil in the vacuum pump, connect the 3/8” hose from the manifold to the pump.
•
Start the pump and run until the micron gauge at the evaporator unit (fan coil unit) reads 200 microns or less.
•
Disconnect the vacuum pump from the system.
•
Break the vacuum by pressurizing the system to approximately 5 PSI with R-134a.
•
Remove the micron gauge from the access valve.
Charging
•
Install a low-pressure gauge on the access valve near the evaporator unit (fan coil unit).
•
With the power off to the condensing unit, admit liquid refrigerant through the liquid line service valve until the
refrigerant stops flowing.
•
Turn on the circuit breaker for the condensing unit. The compressor should turn on if the pressure in the suction
line is above 20 psi.
•
Add refrigerant as a vapor through the low side of the system.
•
Observe the sight glass. If bubbles are present, add more refrigerant in vapor form to the low side.
•
Once the sight glass is clear, check the superheat at the outlet of the evaporator unit (fan coil unit). Adjust the TXV
until the superheat is between 8-12 degrees.
•
If TXV adjustment is necessary, remove the drip tray on the evaporator unit to access the TXV from the cellar.
The drip tray is secured to the wrapper with two screws. Once the screws are removed the drip tray will slide
down and out of the evaporator unit.
•
Under normal operation, with the wine cellar at 55° and the ambient temperature at 85°, the low side pressure
should be between 28-32 PSI and the high side should be between 170-180 PSI.
Finalizing the Installation
•
Confirm that the entire suction line from the TXV to the suction line service valve is insulated using ½” wall cellular
insulation or equivalent. Seal all seams with Armaflex 520 Foam Insulation Adhesive or equivalent.
•
Reinstall the drip tray and Front Access Panel.
•
Confirm that the control is displaying the correct temperature and that no alarms are present. Refer to page 45 for
corrective action if alarms are present.
1.
Push the Grille Back into place. This will attach the
grille to the ball studs.
2.
Screw in the eight screws to secure the Front Access
Panel.
