Mitsubishi Electric EHWT17D-MHEDW, Data Book

Page: 18 / 131

Thermistor inputs
Name Terminal block Connector Item Optional part model
TH1 — CN20 Thermistor (Room temp.) (Option) PAC-SE41TS-E
TH2 — CN21 Thermistor (Ref. liquid temp.) —
THW1 — CNW12 1-2 Thermistor (Flow water temp.) —
THW2 — CNW12 3-4 Thermistor (Return water temp.) —
THW5A — CNW5 1-2 Thermistor (DHW tank upper water temp.) —
THW5B — CNW5 3-4 Thermistor (DHW tank lower water temp.) —
THW6 TBI.5 7-8 — Thermistor (Zone1 flow water temp.) (Option) *1
PAC-TH011-E
THW7 TBI.5 5-6 — Thermistor (Zone1 return water temp.) (Option) *1
THW8 TBI.5 3-4 — Thermistor (Zone2 flow water temp.) (Option) *1
PAC-TH011-E
THW9 TBI.5 1-2 — Thermistor (Zone2 return water temp.) (Option) *1
THW10 TBI.6 5-6 — Thermistor (Mixing tank water temp.)
PAC-TH012HT-E
THWB1 TBI.6 7-8 — Thermistor (Boiler flow water temp.) (Option) *1
Ensure to wire thermistor wirings away from the power line and/or OUT1 to 15 wirings.
*1. The maximum length of the thermistor wiring is 30 m. When the wires are wired to adjacent terminals, use ring
terminals and insulate the wires.
The length of the optional thermistors are 5 m. If you need to splice and extend the wirings, following points must be carried out.
1) Connect the wirings by soldering.
2) Insulate each connecting point against dust and water. Stranded wire should be processed with insulation-cov-
ered bar terminal (DIN46228-4 standard compatible type).
B-215
Water to Water Heat Pump (WTW)
7
Cylinder
unit/
Hydrobox/GSHP/WTW
Cylinder
unit/
Hydrobox/GSHP/WTW