Compressor Control Module; Figure 27 8201-164 Compressor Control Module - Bard MULTI-TEC W18AAPA Service 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
High Pressure Detection
HPC Status LED
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
Manual 2100-665G
Page 22 of 28
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. Once
a compressor call is lost, the time period must expire
before a new call will be initiated.
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
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 27), all timing functions will be removed
for testing.
FIGURE 27
8201-164 Compressor Control Module
Jumper
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