Mitsubishi Electric ecodan PUHZ-W50VHA2 User Manual page 23

INSTALLATION
Electrical Connection
Boost Heat Switch
The boost heat function (Plug J2) gives the option for higher flow temperatures to be constantly targeted as
opposed to weather compensated heating (Eco Heat). A standard two way switch or time clock should be wired
to the boost heat terminals on the FTC2. If the Ecodan system is switched off for a sustained period of time and
and target a high pre-set temperature to raise the property to its design temperature in a shorter period of time.
-selected when the design temperature is reached to make use of the systems high
efficiencies.
TH1 Flow Sensor
A flow thermistor and cable is supplied with the FTC2 package. The sensor should be fixed and insulated to
common flow pipe from the Ecodan. The purpose of the thermistor is to allow the Ecodan to modulate its output
dependant upon the operation mode and the required load of the property. It does this by achieving
preset flow temperatures programmed through the PAR-W21MAA remote controller.
TH5 Tank Temperature Sensor
The cylinder thermistor must be mounted inside a cylinder pocket and should NOT be externally mounted to the
cylinder otherwise incorrect readings may be obtained for the actual cylinder temperature
Fig. 2.7
Note
For 5kW models coil surface area should be 2m 2 and for 8.5kW and 14kW models coil surface area should be 3m 2
The cylinder pocket should be mounted 1/3 to 1/2 way up the cylinder and should be of suitable size to accept the
TH5 sensor.
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