ZEKS CFX NC Series, Technical Manual

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8.0 SCHEDULED MAINTENANCE
8.1 INTRODUCTION
ZEKS NonCycle refrigerated air dryers require little maintenance. These dryers
utilize hermetically sealed compressors which do not require any lubrication. Fan
motors require lubrication at both oil ports every six months. ZEKS recommends
component inspection and service at regular intervals to obtain maximum perfor-
mance from your dryer.
8.2 REFRIGERANT CONDENSER
ZEKS dryers are equipped with an ambient air filter designed to protect the
condenser from dirt and debris that can accumulate on the condenser. For proper
operation, it is imperative that this filter be inspected and cleaned on a regular basis.
Annual replacement of the filter is recommended. For applications where excessive
dirt, dust or debris is encountered, more frequent inspection and cleaning may be
required.
• Start Dryer, using one of the following methods, depending on Start Mode setting:
Manual Mode - Press the ON pushbutton.
Auto Restart Mode - No additional action required
Remote Automatic Mode - Close the remote contact.
• For NonCycle dryers, after the initial delay has timed out, the compressor is
energized. The suction pressure gauge will typically pull down between 76 and
85 psig. The Hot Gas By-Pass Valve may require adjustment on start-up. Refer
to dryer’s Technical Manual for details.
After 5 minutes, slowly introduce air flow to the dryer.
After the alarm delay, provided the Chiller Temperature is greater than the HIGH
TEMPERATURE ALARM set point, the dryer will go into HIGH TEMPERATURE
ALARM. The LCD panel will indicate the alarm and the refrigeration system will
continue to operate. Pressing the SELECT DISPLAY button will permit viewing of
the available dryer parameters during this alarm condition. Note that the alarm
condition screen will reappear after approximately 30 seconds until the alarm
condition is cleared.
The CHILLER TEMPERATURE will gradually drop as indicated on the display.
Once the temperature falls below the HIGH TEMPERATURE ALARM set point, the
alarm will reset and the LCD panel will return to its default display.
Drain settings should be checked as described earlier in this manual and the
dryer’s Technical Manual.