23
c l i m a t e m a s t e r. c o m
T H E S M A R T S O L U T I O N F O R E N E R G Y E F F I C I E N C Y
Tr a n q u i l i t y
®
2 2 ( T Y ) S e r i e s
R e v. : 1 2 / 1 7 / 1 4
Figure 17: LT1 Limit Setting
Electrical - Low Voltage Wiring
Figure 18: Accessory Wiring
P2 Terminal Strip
Typical
Water
Valve
Comp
Relay
24Vdc
EH1
EH2
P6
Off On
JW3
Acc1
Relay
Acc2
Relay
CO
RV
RV
LT1
LT1
LT2
LT2
LP
LP
HP
P7
Status
Fault
CC
CCG
CO
S1
S2
12
1
4
Off On
AO2
P11
Gnd
T1
P10
T2 T2 T3
T3 T4 T4
T5
P9
T5 T6 T6
A0-1 A0-2
Off On
S3
RV
Relay
CCH
Relay
1 2 3 4
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
AO1 Gnd
DXM2 PCB
JW3-LT1 jumper should be clipped for low temperature
(antifreeze) operation
Accessory Connections -
A terminal paralleling the
compressor contactor coil has been provided on the DXM2
control. Terminal “A” is designed to control accessory
devices. Note: This terminal should be used only with 24
Volt signals and not line voltage. Terminal “A” is energized
with the compressor contactor.
The DXM2 controller includes two accessory relays ACC1
and ACC2. Each relay includes a normally open (NO) and
a normally closed (NC) contact. Accessory relays may be
confi gured to operate as shown in the tables below.
Accessory Relay 2 Confi guration
Accessory Relay 1 Confi guration
DIP 2.1
DIP 2.2
DIP 2.3
ACC1 Relay Option
ON
ON
ON
Cycle with fan
OFF
ON
ON
N/A for Residential Applications
ON
OFF
ON
Water valve – Slow opening
ON
ON
OFF
Outside air damper
OFF
ON
OFF
ClimaDry option – Dehumidistat
OFF
OFF
OFF
ClimaDry option – Humidistat
OFF
OFF
ON
N/A for Residential Applications
ON
OFF
OFF
N/A for Residential Applications
All other DIP combinations are invalid
DIP 2.4
DIP 2.5
DIP 2.6
ACC2 Relay Option
ON
ON
ON
Cycle with compressor
OFF
ON
ON
N/A for Residential Applications
ON
OFF
ON
Water valve – Slow opening
OFF
OFF
ON
Humidi
fi
er
ON
ON
OFF
Outside air damper
All other DIP combinations are invalid
Water Solenoid Valves -
An external solenoid valve(s)
should be used on ground water installations to shut off
fl ow to the unit when the compressor is not operating.
A slow closing valve may be required to help reduce
water hammer. Figure 18 shows typical wiring for a 24VAC
external solenoid valve. Figures 19 and 20 illustrate
typical slow closing water control valve wiring for Taco
500 series (ClimateMaster P/N AVM) and Taco SBV
series valves. Slow closing valves take approximately
60 seconds to open (very little water will fl ow before 45
seconds). Once fully open, an end switch allows the
compressor to be energized. Only relay or triac based
electronic thermostats should be used with slow closing
valves. When wired as shown, the slow closing valve will
operate properly with the following notations:
1. The valve will remain open during a unit lockout.
2. The valve will draw approximately 25-35 VA through
the “Y” signal of the thermostat.
Note: This valve can overheat the anticipator of an
electromechanical thermostat. Therefore, only relay or
triac based thermostats should be used.
Two-stage Units
Tranquility
®
22 (TY) two-stage units should be designed with
two parallel valves for ground water applications to limit
water use during fi rst stage operation. For example, at 1.5
gpm/ton [2.0 l/m per kW], a TY048 unit requires 6 gpm [23
l/m] for full load (2nd stage) operation, but only 4 gpm [15
l/m] during 1st stage operation. Since the unit will operate
on fi rst stage 80-90% of the time, signifi cant water savings
can be realized by using two parallel solenoid valves with two
fl ow regulators. In the example above, stage one solenoid
would be installed with a 4 gpm [15 l/m] fl ow regulator on
the outlet, while stage two would utilize a 2 gpm [8 l/m] fl ow
regulator. When stage one is operating, the second solenoid
valve will be closed. When stage two is operating, both
valves will be open, allowing full load fl ow rate.
Figure 21 illustrates piping for two-stage solenoid valves.
Review fi gures 18-20 for wiring of stage one valve. Stage
two valve should be wired between terminal “Y2” and
terminal “C.” NOTE: When EWT is below 50°F [10°C], 2
gpm per ton (2.6 l/m per kW) is required.
