CellarPro 3000Scmr, Owner'S Manual

Page: 40 / 55

40 V10.19
Important note: The condensing unit and evaporator(s) are shipped with a nitrogen holding
charge. Please verify positive pressure through the access valve prior to installation. If
you cannot verify the holding charge, please contact CellarPro at 707.794.8000.
Once the piping is installed, the following steps should be performed to ensure a dry and
leak-free system:
1. The Condensing unit is pre-charged with compressor oil. To avoid moisture
contamination of the oil, do not leave the system open to atmosphere for more than 15
minutes.
2. Dual Power Source / Valve Control Systems Only: Supply power to the Evaporator
only - DO NOT connect power to the Condensing unit. Turn on the temperature
controller, which will energize and open the liquid line solenoid valve(s). Verify the
solenoid is powered as indicated by the compressor icon ("snowflake") on the
temperature controller display.
3. Pressurize the system to a maximum of 150PSIG of dry nitrogen. It is important to add
nitrogen though both the high and low side access valves on the condensing unit to
make sure the system is fully pressurized. Mark the pressure and hold for a minimum
of 1 hour. If the pressure holds, proceed to the next step, otherwise locate and repair
the leak and repeat this step.
4. Evacuate the system to a minimum of 500 microns. It is important to pull a vacuum
though both the high and low side access valves on the condensing unit to make sure
the system is fully evacuated. If the vacuum is achieved, proceed to the next step,
otherwise locate and repair the leak and repeat from step 4.
5. Disconnect the vacuum pump, but leave the system under vacuum . Use a charging
scale to accurately weigh in the refrigerant. Charge liquid R-134a refrigerant through
the liquid service valve according to the charge pounds indicated in the "System R-
134a Charge Guidelines" chart below. Additional refrigerant may need to be added,
using the steps outlined below. DO NOT USE REFRIGERANT WITH ADDITIVES.
6. Important: The most common causes of compressor failure are refrigerant
overcharge, adding liquid refrigerant through the suction access valve, and cold
compressor starts. If your system is equipped with a compressor heater, make sure
this is wired to be energized even when the system is idle. If starting up the system in
a cold ambient, or if the system has been sitting idle without the compressor heater
energized for more than 24 hours, it is critical to warm the bottom shell of the
compressor above the ambient temperature for 30 minutes to drive excess refrigerant
out of the compressor oil.