ZEKS CFX NC Series, Technical Manual

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HIGH DRAIN LEVEL ALARM - OPTIONAL (DRAIN LVL ALARM)
On dryers equipped with the optional High Drain Level Alarm, should condensate
rise to a predetermined level in the separator, a liquid level switch will signal the
DPC and the High Drain Level Alarm will enunciate. In addition to indicating the
alarm on the LCD and closing the remote alarm contact, the High Drain Level
Alarm will open the solenoid drain in an attempt to correct the problem. The
condition must be addressed to reset the dryer.
6.6.6 START MODES
ZEKS dryers are capable of starting in one of three start modes. Note that to
protect the refrigeration compressor from repeated rapid starts, the DPC™ is
equipped with an an anti-short cycle (ASC) delay. The ASC delay will countdown
from the factory set point (see TECHNICIAN MODE). Only after the ASC delay
has timed out will the refrigeration system operate. Below are brief descriptions of
these various start modes.
6.6.6.1 Manual Mode
ZEKS dryers are shipped from the factory in the Manual Mode. After power is
supplied to the dryer, the user will be presented with the ASC delay, followed by
the “PRESS ON BUTTON” display. After the ASC delay has timed out, the dryer
will only start once the ON button is depressed. In this configuration, to restart the
dryer, the user must manually depress the ON button on the dryer’s control panel.
6.6.6.2 Auto Restart Mode
After power is applied to the dryer, and once an anti-short cycle delay has timed
out, the dryer will start automatically. In addition, this mode of operation allows
manual control of the dryer via the ON & OFF pushbuttons. This is useful for
applications where automatic restarting of the dryer is desired after a power failure
has occurred.
6.6.6.3 Remote Automatic Mode
This mode of operation allows the user to control the dryer remotely and requires
the installation of a customer-supplied contact. With power applied to the dryer
and once the anti-short cycle delay has timed out, the dryer will start automatically
once the switch is closed. In addition, this mode of operation allows manual control
of the dryer via the ON & OFF pushbuttons.
Parameter R-22 R-404A R-407C
FAN 1 ON 235 psig 275 psig 235 psig
FAN 1 OFF 195 psig 195 psig 195 psig
FAN 2 ON 265 psig 335 psig 265 psig
FAN 2 OFF 210 psig 235 psig 210 psig
HPCO (Air Cooled) 400 psig 450 psig 400 psig
HPCO (Water Cooled) 320 psig 320 psig 320 psig
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