Compressor Control Module; Features; Delay-On-Make Timer; Short Cycle/Delay-On-Break - Bard WA Series Installation Instructions Manual

Compressor Control Module

The compressor control module (CCM) is standard on
all models covered by this manual.

Features

Delay-on-Make Timer

Short Cycle Protection/Delay-on-Break

Low Pressure Detection

High Pressure Detection

LPC and HPC Status LEDs
Test Mode
Brownout Protection with Adjustment
Delay-on-Make Timer
A delay-on-make timer is included to be able to delay
startup of the compressor. This is desired when more
than one unit is on a structure so that all of the units
do not start at the same time which could happen
after a power loss or building shutdown. The delay-
on-make time period is 2 minutes plus 10% of the
delay-on-break time period. To ensure that all of the
units do not start at the same time, adjust the delay-
on-break timer on each unit to a slightly different
delay time.
High Pressure Switch
18-30 VAC Input
Y Input from Thermostat
and High Pressure Switch
Troubleshooting Light
Low Pressure Switch
Short Cycle Protection/Delay-on-Break
An anti-short cycle timer is included to prevent short
cycling the compressor. This is adjustable from 30
seconds to 5 minutes via the adjustment knob (see
Figure 10). Once a compressor call is lost, the time
period must expire before a new call will be initiated.
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.
FIGURE 10
8201-164 Compressor Control Module
Brownout Ignore Time DIP Switches*
* Turn on only one switch for that specific ignore time setting
Compressor Contactor Output
Alarm Output
Common
Delay-on-Break Time
Adjustment Potentiometer
Manual 2100-689
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