30
G e o t h e r m a l H e a t i n g a n d Co o l i n g
Tranquility
®
30 Digital (TE) Series IOM - 60Hz HFC-410A
R e v. : O c t o b e r 5 , 2 0 2 1
The DXM2 microprocessor control monitors the refrigerant
and water temperatures to determine when to operate
the HWG. The HWG will operate any time the refrigerant
temperature is sufficiently above the water temperature. Once
the HWG has satisfied the water heating demand during a
heat pump run cycle, the controller will cycle the pump at
regular Intervals to determine if an additional HWG cycle can
be utilized.
When the control is powered and the HWG pump output is
active for water temperature sampling or HWG operation,
the DXM2 status LED will slowly flash (On 1 second, Off 1
second).
If the control has detected a HWG fault, the DXM2 status LED
will flash a numeric fault code as follows:
High Water Temperature (>160ºF)
5 flashes
Hot Water Sensor Fault
6 flashes
Compressor Discharge Sensor Fault
6 flashes
Fault code flashes have a duration of 0.3 seconds with
a 10 second pause between fault codes. For example, a
“Compressor Discharge sensor fault” will be six flashes 0.3
seconds long, then a 10 second pause, then six flashes
again, etc.
Hot Water Generator
⚠
WARNING!
⚠
⚠
WARNING!
⚠
WARNING! UNDER NO CIRCUMSTANCES SHOULD THE
SENSORS BE DISCONNECTED OR REMOVED. FULL
LOAD CONDITIONS CAN DRIVE HOT WATER TANK
TEMPERATURES FAR ABOVE SAFE TEMPERATURE
LEVELS IF SENSORS DISCONNECTED OR REMOVED.
WARNING! USING A 150°F SETPOINT ON THE
HWG WILL RESULT IN WATER TEMPERATURES
SUFFICIENT TO CAUSE SEVERE PHYSICAL INJURY
IN THE FORM OF SCALDING OR BURNS, EVEN WHEN
THE HOT WATER TANK TEMPERATURE SETTING
IS VISIBLY SET BELOW 150°F. THE 150°F HWG
SETPOINT MUST ONLY BE USED ON SYSTEMS THAT
EMPLOY AN APPROVED ANTI-SCALD VALVE (PART
NUMBER AVAS4) AT THE HOT WATER STORAGE
TANK WITH SUCH VALVE PROPERLY SET TO
CONTROL WATER TEMPERATURES DISTRIBUTED
TO ALL HOT WATER OUTLETS AT A TEMPERATURE
LEVEL THAT PREVENTS SCALDING OR BURNS!
C
H
M
WATER HEATER
CHECK VALVE
8” M
AX
HOT WATER
TO HOUSE
ANTI-SCALD
VALVE
ANTI-SCALD
VALVE PIPING
CONNECTIONS
COLD WATER
SUPPLY
Installation
The HWG is controlled by two sensors and the DXM2 micro-
processor control. One sensor is located on the compressor
discharge line to sense the discharge refrigerant tempera-
ture. The other sensor is located on the HWG heat exchang-
er’s “Water In” line to sense the potable water temperature.
Figure 23: Anti-Scald Valve Piping Connections
Hot Water Generator settings are determined by DIP switches
3-2, 3-3, and 3-4.
DIP 3-2 controls the HWG Test Mode. It provides for forced
operation of the HWG output, activating the HWG pump for
up to five minutes. ON = HWG test mode, OFF = normal
HWG operation. The control will revert to standard operation
after five minutes regardless of switch position.
DIP 3-3 determines HWG set point temperature. It provides
for selection of the HWG operating set point. ON = 150°F
(66°C), OFF = 125°F (52°C).
DIP 3-4 is for the HWG status. It provides HWG operation
control. ON = HWG mode enabled, OFF = HWG mode
disabled. Units are shipped from the factory with this switch in
the OFF position.
P1
Alarm
Relay
Comp
Relay
O
Y1
Y2
W
G
C
R
AL1
24Vdc
EH1
EH2
P6
R
C
Off On
JW3
A
OVR
ESD
C
R
NSB
AL2
JW1
Acc1
Relay
Acc2
Relay
H
COM1
NC1
NO1
COM2
NC2
NO2
P3
CO
RV
RV
LT1
LT1
LT2
LT2
LP
LP
HP
HP
P7
Status
Fault
R
R
CC
CCG
CO
S1
S2
1
12
1
4
es
U
yr
ot
ca
F
(240Vac)
Com
N.O.
Fan Enable
7"
Micro
U1
Off On
P2
COH
COM
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
Test
P5
B-
Gnd
P4
A+ 24V
(240Vac)
Fan Speed
N.O.
N.C.
12V
OUT
Gnd
P8
IN
NC
P12
1 2 3 4
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
Hot Water
Generator
Settings
Figure 24: Hot Water Generator Settings
