Pressure Service Ports - Bard 11EER WA Series User's Application Manual

High Pressure Switch
18-30 VAC Input
Y Input from Thermostat
and High Pressure Switch
Troubleshooting Light
Low Pressure Switch
If a brownout condition is detected by the 8201-169,
the troubleshooting light will flash blue. The light will
continue to flash until the cooling call is satisfied or
power is removed from the Y terminal. This condition
does not prevent operation, it only indicates that a
brownout condition was present at some point during
the cooling call. If a brownout condition is detected,
CC will be de-energized and will retry after the delay-
on-make timer is satisfied; this process will continue
until call is satisfied.
If user chooses the 'do not ignore' position (all three
DIP switches "off") when the site has inadequate utility
or generator power, this could lead to the compressor
never starting. The control will see the brownout
immediately and not start.
A common scenario and one that has been seen in the
field is when a unit or units switches from utility power
to generator power. With slower transfer switches, the
time delay between the utility power and generator
power didn't cause a problem. The units lost power,
shut off and came back on line normally. With the
introduction of almost instantaneous transfer switches,
the millisecond long power glitch can be enough that
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. If all
switches are "off", the control is in "do not ignore".
the compressor will start to run backwards. In this
scenario, the CCM will catch this and restart the units
normally.

Pressure Service Ports

High and low pressure service ports are installed on
all units so that the system operating pressures can be
observed. Pressure tables covering all models can be
found on pages 31 and 32. It is imperative to match
the correct pressure table to the unit by model number.
This unit employs high-flow Coremax valves instead of
the typical Shrader type valves.
WARNING! Do NOT use a Schrader valve core removal
tool with these valves. Use of such a tool could result
in eye injuries or refrigerant burns!
To change a Coremax valve without first removing the
refrigerant, a special tool is required which can be
obtained at www.fastestinc.com/en/SCCA07H. See the
replacement parts manual for replacement core part
numbers.
Compressor Contactor Output
Alarm Output
Common
Delay-on-Break Time
Adjustment Potentiometer
Manual 2100-692H
Page 27 of 44