C L I M AT E M A S T E R WAT E R - S O U R C E H E AT P U M P S
Tranquility
®
Water-to-Water (TMW) Series
R e v. : M a r c h 1 0 , 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
36
Safety Features – CXM/DXM Controls, Cont’d.
If a UPS condition occurs, the control will immediately
go to UPS warning. The status LED will remain on as
if the control is in normal mode. Outputs of the control,
excluding LED and alarm relay, will NOT be affected
by UPS. The UPS condition cannot occur during a
compressor off cycle. During UPS warning, the alarm
relay will cycle on and off. The cycle rate will be “on” for 5
seconds, “off” for 25 seconds, “on” for 5 seconds, “off” for
25 seconds, etc.
UPS warning code = 8
Swapped LT1/LT2 thermistors:
During test mode, the
control monitors to see if the LT1 and LT2 thermistors are
in the appropriate places. If the control is in test mode, the
control will lockout with code 9 after 30 seconds if:
a. The compressor is on in the cooling mode and the
LT1 sensor is colder than the LT2 sensor, or:
b. The compressor is on in the heating mode and the
LT2 sensor is colder than the LT1 sensor.
Swapped LT1/LT2 thermistor code = 9.
ESD (DXM only):
The ESD (Emergency Shut Down)
mode can be enabled from an external common signal to
terminal ESD to shut down the unit. The green status light
will flash code 3 when the unit is in ESD mode.
ESD mode = code 3 (green “status” LED)
CXM/DXM CONTROLS
Diagnostic Features -
The LED on the CXM board
advises the technician of the current status of the CXM
control. The LED can display either the current CXM mode
or the last fault in memory if in test mode. If there is no
fault in memory, the LED will flash Code 1 (when in test
mode).
The green status LED and red fault LED on the DXM
board advise the technician of the current status of the
DXM control. The status LED will indicate the current
mode that the DXM control is in. The fault LED will
ALWAYS flash a code representing the LAST fault in
memory. If there is no fault in memory, the fault LED will
flash Code 1. The yellow test LED will turn on when in
test mode.
CXM/DXM Control Start-up Operation -
The control
will not operate until all inputs and safety controls are
checked for normal conditions. The compressor will have
a 5 minute anti-short cycle delay at power-up. The first
time after power-up that there is a call for compressor,
the compressor will follow a 5 to 80 second random
start delay. After the random start delay and anti-short
cycle delay, the compressor relay will be energized. On all
subsequent compressor calls, the random start delay is
omitted.
Environment -
This unit is designed for indoor installation
only. Do not install in an area subject to freezing or where
humidity levels can cause cabinet condensation.
Power Supply -
A voltage variation of +/- 10% of
nameplate utilization voltage is acceptable.
Operation and performance is primarily dependent upon
water temperatures, water flow rates and ambient air
temperature. This water to water heat pump is capable of
operating over a wide temperature range and with flow
rates of between 1.5 GPM (.1 l/s) and 3 GPM (.19 l/s) per
ton, however usually no more than one of these factors
may be at a minimum or maximum level at a time.
The commissioning table
indicates water temperatures
which are suitable for initial unit commissioning in an
environment where the flow rate and water temperature
is not yet stable and to avoid nuisance shut down of the
units freeze and refrigerant pressure safeties.
The operating table
indicates the maximum and
minimum ranges of the unit.
For more specific unit performance reference the product
catalog, the submittal data sheets or contact your supplier
for assistance.
BUILDING COMMISSIONING
Cooling
Heating
Unit Size
036
060/120 170/340
036
060/120 170/340
Source Min/Max
50/110 50/120
50/90
30/80
30/80
50/70
Load Min/Max
60/80
60/90
60/90
60/120
60/120
80/120
Ambient Min/Max
45/110
39/85
BUILDING OPERATING
Cooling
Heating
Unit Size
036
060/120 170/340
036
060/120 170/340
Source Min/Max
50/120
50/120
50/110
20/80
20/80
20/70
Load Min/Max
50/90
50/90
50/90
60/130
60/130
60/120
Ambient Min/Max
45/110
39/85
