High Pressure Detection; Test Mode; Brownout Protection With Adjustment - Bard WA Series User Manual

Low Pressure Detection
Low pressure switch monitoring allows for a lockout
condition in a situation where the switch is open. If
the low pressure switch remains open for more than
2 minutes, the CCM will de-energize the compressor
for the delay-on-break time. If the switch closes again,
it will then restart the compressor. If the switch trips
again during the same Y call, the compressor will be
de-energized and the alarm terminal will be energized
indicating an alarm. The blue LED will light and
stay on until power is cycled to the control or a loss
of voltage is present at Y terminal for more than ½
second.

High Pressure Detection

High pressure switch monitoring allows for a lockout
condition in a situation where the switch is open. If
the high pressure switch opens, the CCM will de-
energize the compressor. If the switch closes again,
it will then restart the compressor after the delay-
on-break setting has expired on the device. If the
switch trips again during the same thermostat call,
the compressor will be de-energized and the alarm
High Pressure Switch
18-30 VAC Input
Y Input from Thermostat
and High Pressure Switch
Troubleshooting Light
Low Pressure Switch
terminal will be energized indicating an alarm. The
red LED will light and stay on until power is cycled
to the control or a loss of voltage is present at Y
terminal for more than ½ second.

Test Mode

By rapidly rotating the potentiometer (POT) clockwise
(see Figure 22), all timing functions will be removed
for testing.
The conditions needed for the unit to enter test mode
are as follows: POT must start at a time less than or
equal to the 40 second mark. The POT must then be
rapidly rotated to a position greater than or equal to
the 280 second mark in less than ¼ second. Normal
operation will resume after power is reset or after the
unit has been in test mode for at least 5 minutes.

Brownout Protection with Adjustment

Brownout protection may be necessary if the utility
power or generator power has inadequate power to
prevent the voltage from dropping when the compressor
starts. This is rare but can happen if the generator
is undersized at the site or if the site is in a remote
FIGURE 22
8201-169 Compressor Control Module
Brownout Ignore Time DIP Switches*
* Turn on only one switch for that specific ignore time setting.
10 seconds is the maximum brownout ignore time.
Compressor Contactor Output
Alarm Output
Common
Delay-on-Break Time
Adjustment Potentiometer
Manual 2100-720C
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