TemperZone TZT-100 - Alternative Control Wiring

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Heat Pump Water Heaters
MWP Series
Other options include:
1. Universal 24V ac or 12V dc dry contact for either compatible thermostat or BMS control via input/output.
2. BMS control via Modbus over RS485.
For a full list of the Modbus control setup, settings and read/write parameters refer Appendix I or contact Temperzone for details or
visit www.temperzone.com; model search ‘BMS’.
Figure 7
Alternative Control Wiring
MWP Unit
12
B
A
0V
B2
A2
UC8
UC8
UC8
UC8
12
0V
TZT-100
T/stat Options
24V AC
option*
Alternative
compatible
thermostat
or
BMS
(independently
powered)
E
N
L1
L2
L3
Power Supply
1Ø (2 core+E)
or
3Ø (4 core+E)
depending on unit
External
Protection
Isolator
COMP
HEAT
On
0V
Optional
Remote On/Off
(*remove link if used)
CP
HT
C2
Optional
Communicating
BMS Controller
Modbus RTU
12V DC
option*
B1
A1
0V
B
A
REF
Control
- shielded
twisted pair
2 core + screen
Control
- shielded
twin twisted pair
4 core
*Use either option; NOT both.
UC8
(AUX)
Run Status
N/O
C
N/C
12
VC
0V
T
T
Return Water
Temp. Sensor
(located base
of ThermoShell)
Ye
link*
1
2
1
2