Bard WA Series, Руководство по установке

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Manual 2100-689
Page 19 of 32
FIGURE 10
8201-164 Compressor Control Module
High Pressure Switch Compressor Contactor Output
Alarm Output
Common
Delay-on-Break Time
Adjustment Potentiometer
Brownout Ignore Time DIP Switches*
18-30 VAC Input
Y Input from Thermostat
and High Pressure Switch
Troubleshooting Light
* Turn on only one switch for that specific ignore time setting
Low Pressure Switch
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.
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.