CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Tranquility
®
(TRL) Series
R e v. : N o v e m b e r 1 1 , 2 0 2 1
C l i m a t e M a s t e r Wa t e r-S o u rc e H e a t P u m p s
38
CXM2 Controls
CXM2 Control -
For detailed control
information, see CXM2 Application,
Operation and Maintenance (AOM)
manual (part #97B0137N01).
Field Selectable Inputs -
Test mode:
Test mode allows the service technician
to check the operation of the control in a
timely manner. By momentarily pressing
the TEST pushbutton, the CXM2 control
enters a 20 minute test mode period in
which all time delays are sped up 15
times. Upon entering test mode, the
status LED display will change, either
flashing rapidly to indicate the control is
in the test mode, or displaying a numeric
flash code representing the current
airflow if an ECM blower is connected
and operating. For diagnostic ease at
conventional thermostats, the alarm relay
will also cycle during test mode. The alarm
relay will cycle on and off similar to the
fault LED to indicate a code representing
the last fault, at the thermostat. Test
mode can be exited by pressing the TEST
pushbutton for 3 seconds.
Field Configuration Options –
Note: In
the following field configuration options,
jumper wires should be clipped ONLY
when power is removed from the CXM2
control.
Water coil low temperature limit setting:
Jumper 3 (JW3-LT1 Low Temp) provides
field selection of refrigerant temperature
limit setting of 25°F or 10°F [-4°F or -12°C]
and leaving water temperature of 30°F and
15°F [-1°C or -9°C].
Refrigerant Temperatures:
Not Clipped = 25°F [-4°C].
Clipped = 10°F [-12°C].
Leaving Water Temperatures:
Not Clipped = 30°F [-1°C].
Clipped = 15°F [-9°C].
Alarm relay setting: Jumper 1 (JW1-
AL2 Dry) provides field selection of the
alarm relay terminal AL2 to be jumpered
to 24VAC or to be a dry contact (no
connection).
Not Clipped = AL2 connected to R.
Clipped = AL2 dry contact (no
connection).
Low pressure limit setting: Jumper 3
(JW3-LP switch) provides field selection
of pressure limit setting for LP switch.
Each unit comes equipped with one LP1
switch setup at 70psig cut-out and one
LP2 switch setup at 45psig cut-out.
CXM2 board will ignore one based on
JW3 jumper status.
Not clipped = Ignore LP2.
Clipped = Ignore LP1