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COMPRESSOR CONTROL MODULE
The compressor control module 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
FIGURE 21
8201-164 COMPRESSOR CONTROL MODULE
Jumper
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 21), all timing functions will be removed
for testing.
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 2100-600C
Page
29 of 38
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