CellarPro 3000Scm, Руководство пользователя

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V3.3.16
Evacuation, Leak Detection, and Charging
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.