Mitsubishi Electric EHST20 Series Manuel d'installation télécharger pdf (Page 22)

Cylinder Room

Room

temperature

thermistor

FTC3

Cylinder Room

Room

temperature

thermostat

(local supply)

FTC3

Cylinder Room

FTC3

Max

20°C

Cylinder Room

FTC3

System Set Up

5.3 Remote Controller Options

The cylinder unit comes factory ﬁ tted with a main controller. This incorporates a

thermistor for temperature monitoring and a graphical user interface to enable

set-up, view current status and input scheduling functions. The main controller is

also used in servicing through the password protected service menus.

To provide the best efﬁ ciency Mitsubishi Electric recommends using automatic

adaptation function based on room temperature. To use this function a room ther-

mistor needs to be present in a main living area. This can be done in a number of

ways the most convenient are detailed below.

Refer to heating and cooling section of this manual for instructions on how

to set compensation curve, ﬂ ow temp or room temp (Auto adaptation).

For instructions on how to set the thermistor input for the FTC3 please refer

to initial settings section.

Factory supplied standard

Control option A

This option features the main controller and the Mitsubishi Electric wireless remote

controller. The wireless remote controller is used to monitor room temperature and can

be used to make changes to the space heating settings, boost DHW and switch to holi-

day mode without having to directly use the main controller.

If more than one wireless remote controller is used, the most recent temperature set-

tings entered will be used regardless of which controller is used to enter the settings.

The wireless receiver must be connected to the FTC3 as detailed in the wireless con-

troller instruction manual.

DIP SW1-8 should be ON. Before operation wireless controller should be conﬁ gured

to transmit and receive data as detailed in the wireless controller installation manual.

Control option B

This option features the main controller and the Mitsubishi Electric thermistor wired to

the FTC3. The thermistor is used to monitor room temperature but can not make any

changes in control operation. Any changes to DHW must be made using main control-

ler mounted on the cylinder unit.

The thermistor is wired to the FTC3 using TH1 terminal on the terminal block TBI.1.

Only 1 room temperature thermistor can be connected to the FTC3 at 1 time.

Control option C

This option features the main controller and locally supplied thermostat wired to the

FTC3. The thermostat is used to set the upper limit of space heating(/cooling). Any

changes to DHW must be made using main controller mounted on the cylinder unit.

The thermostat is wired to the FTC3 using IN1 terminal on the terminal block TBI.2.

Only 1 thermostat can be connected to the FTC3 at 1 time.

Control option D

This option features the main controller being removed from the cylinder unit and situ-

ated in a different room. All features of the main controller are still available and the in-

built thermistor can be used for monitoring the temperature of the room in which it is

installed for Auto Adaptation function.

The main controller and the FTC3 are connected by a 2 core, 0.3 mm² , non polar ca-

ble (local supply) maximum length of 500 m.

If using the sensor in the main controller it should be detached from cylinder unit. Oth-

erwise it will detect the temperature of cylinder unit instead of room temperature. This

will inﬂ uence the output of the space heating.

Mitsubishi Electric main control cover blank should be used to ﬁ ll the resultant gap on

the cylinder left by the removal of the control panel.

Cylinder

FTC3

The factory setting for space heating(/cooling) is room temp (auto adaptation).

If there is no room sensor present in the system, this setting must be changed

to either compensation curve mode or ﬂ ow temp mode.

Outdoor unit

Wireless receiver (optional part)

Main controller

Wireless remote controller

Main controller

(remote position)

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Mitsubishi Electric EHST20 Series Manuel d'installation Page 22

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