ClimateMaster Tranquility TCH 024 - Page 56

ClimateMaster Water-Source Heat Pumps
56
CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Tranquility
®
Compact (TC) Series
Rev.: July 7, 2020
DXM2 Controls, Cont’d.
Table 5b: Accessory DIP Switch Settings
CAUTION! 
CAUTION! Do not restart units without inspection and remedy
of faulting condition. Equipment damage may occur.
DIP 2.1 DIP 2.2 DIP 2.3 ACC1 Relay Option
On On On Cycle with fan
Off On On Digital NSB
On Off On Water Valve - slow opening
On On Off OAD
Off Off Off Reheat Option - Humidistat
Off On Off Reheat Option - Dehumidistat
DIP 2.4 DIP 2.5 DIP 2.6 ACC2 Relay Option
On On On Cycle with compressor
Off On On Digital NSB
On Off On Water Valve - slow opening
On On Off OAD
AllotherDIPcombinationsa
reinvalid
1.6 – DDC output at EH2: DIP 1.6 provides selection for
DDC operation. If set to “DDC Output at EH2,” the EH2
terminal will continuously output the last fault code of
the controller. If set to “EH2 normal,” EH2 will operate as
standard electric heat output.
On = EH2 Normal. Off = DDC Output at EH2.
1.7– Boilerless operation: DIP 1.7 provides selection of
boilerless operation. In boilerless mode, the compressor is
only used for heating when LT1 is above the temperature
specied by the setting of DIP 1.8. Below DIP 1.8 setting,
the compressor is not used and the control goes into
emergency heat mode, staging on EH1 and EH2 to
provide heating.
On = normal. Off = Boilerless operation.
1.8 – Boilerless changeover temperature: DIP 1.8 provides
selection of boilerless changeover temperature setpoint.
Note that the LT1 thermistor is sensing refrigerant
temperature between the coaxial heat exchanger and
the expansion device (TXV). Therefore, the 50°F [10°C]
setting is not 50°F [10°C] water, but approximately 60°F
[16°C] EWT.
On = 50°F [10°C]. Off = 40°F [16°C].
DIP Package #2 (S2) – A combination of dip switches
2.1, 2.2, 2.3, and 2.4, 2.5, 2.6 deliver conguration of
ACC1 and ACC2 relay options respectively. See Table 5b
for description and functionality.
2.7 – Auto dehumidication fan mode or high fan mode:
DIP 2.7 provides selection of auto dehumidication fan
mode or high fan mode. In auto dehumidication mode,
the fan speed relay will remain off during cooling stage 2
IF the H input is active. In high fan mode, the fan enable
and fan speed relays will turn on when the H input is
active.
On = Auto dehumidication mode (default). Off = High fan
mode.
2.8 – Special factory selection: DIP 2.8 provides special
factory selection. Normal position is “On”. Do not change
selection unless instructed to do so by the factory.
DIP Package #3 (S3)
– DIP Package #3 has 4 switches and provides the
following setup and operating selections:
3.1 – Communications conguration: DIP 3.1 provides
selection of the DXM2 operation in a communicating
system. The DXM2 may operate as the Master of certain
network congurations. In most congurations the DXM2
will operate as a master device.
On = Communicating Master device (default). Off =
communicating Slave device.
3.2 – HWG Test Mode: DIP 3.2 provides forced operation
of the HWG pump output, activating the HWG pump
output for up to ve minutes.
On = HWG test mode. Off = Normal HWG mode (default).
3.3 – HWG Temperature: DIP 3.3 provides the selection
of the HWG operating setpoint.
On = 150°F [66°C]. Off = 125°F [52°C] (default).
3.4 – HWG Status: DIP 3.4 provides HWG operation
control.
On = HWG mode enabled. Off = HWG mode disabled
(default).