Connecting Thermistor Cable - Mitsubishi Electric ecodan PUHZ-W50VHA2 User Manual

WIRING SPECIFICATION OF EXTERNAL INPUT
Locally supplied parts
Connecting thermistor cables
CONNECTING THERMISTOR CABLE (TH1)
Connect the thermistor for the actual flow water temperature to 1 and 2 on the terminal block (TB61) on the FTC2 controller.
When the thermistor cables are too long, cut them at the appropriate length. Do not bend them in the FTC2 unit. Thermistor
contacts are non polar.
Thermistor position
Put TH1 on water piping (water outlet side) after booster heater. Be sure to attach the TH1 where it detects flow temperature
(water outlet side) correctly.
Thermistor position
TH2 sensor is not required for packaged type system as it is used to monitor refrigerant pipe temperature on split type systems.
CONNECTING THERMISTOR CABLE (TH5)
Connect the thermistor for the actual domestic hot water cylinder temperature to 5 and 6 on the terminal block (TB61) on the
FTC2 controller. When the thermistor cables are too long, cut them at the appropriate length. Do not bend them in the FTC2
unit.
Thermistor position
Put the TH5 on the domestic hot water cylinder. It should be positioned inside the cylinder pocket
Caution: Do not route the thermistor cables together with power cables. The sensor part of the thermistor should be installed
where the user can not touch it; (separated by the supplementary insulation from where user may touch).
Item
External input function
32
INSTALLATION: FTC2
Name
External input signal wire
Switch
Model and specification
Use sheathed vinyl coated cord or cable.
Max. 10m
Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5mm² to 1.25mm²
Solid wire: Ø0.65mm to Ø1.2mm
Non-
Remote switch: minimum applicable load DC 12V, 1mA
Type
Packaged
Type
O: Necessary. Connect the thermistor
X: Not necessary: The thermistor is not required, do not
connect
Fig. 3.9
31
Table 1.6
DHW tank TH1 TH2
Present O X
Absent O X
Table 1.7
TH5
O
X