Remote Controller Options; 1-Zone Temperature Control - Mitsubishi Electric Ecodan EHSC series Installation Manual

5
System Set Up

5.5 Remote Controller Options

The hydrobox comes factory fitted 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 for servicing purposes.
This facility is accessed via password protected service menus.
To provide the best efficiency Mitsubishi Electric recommends using automatic adaptation
function based on room temperature. To use this function a room thermistor 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 section of this manual for instructions on how to set compensation
curve, flow temp or room temp (Auto adaptation).
For instructions on how to set the thermistor input for the FTC4 please refer to Initial
settings section.
The factory setting for space heating mode is set to 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 Flow temp mode.
Note: Auto-adaptation is not available in Cooling mode.

1-zone temperature control

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 (*1) and switch to
holiday mode without having to directly use the main controller.
If more than one wireless remote controller is used, the most recently requested
temperature setting will commonly be applied to all rooms by the central control system
regardless of which wireless remote controller was used. No hierarchy exists across
these remote controllers.
Wire the wireless receiver to FTC4 referring to the wireless remote controller
instruction manual. Turn DIP SW1-8 to ON. Before operation configure the wireless
remote controller to transmit and receive data referring to the wireless remote
controller installation manual.)
Control option B
This option features the main controller and the Mitsubishi Electric thermistor wired to
FTC4. The thermistor is used to monitor room temperature but can not make any
changes in control operation. Any changes to DHW (*1) must be made using the main
controller mounted on the hydrobox.
Wire the thermistor to the TH connector on FTC4.
The number of room temperature thermistors that can be connected to FTC4 is always
one.
Control option C
This option features the main controller being removed from the hydrobox and situated
in a different room. A thermistor built in the main controller can be used for monitoring
the room temperature for Auto Adaptation function whilst keeping all its features of the
main controller available.
The main controller and FTC4 are connected by a 2-core, 0.3 mm², non-polar cable
(field supply) with a maximum length of 500 m.
To use the sensor in the main controller the main controller should come off from the
hydrobox. Otherwise it will detect the temperature of the hydrobox instead of room tem-
perature. This will affect the output of the space heating.
Control option D (Flow temp. or compensation curve only)
This option features the main controller and a locally supplied thermostat wired to FTC4.
The thermostat is used to set the maximum temperature for heating room. Any changes
to DHW (*1) must be made using main controller mounted on the hydrobox.
The thermostat is wired to IN in TBI. on FTC4. The number of thermostats that can be
connected to FTC4 is always one.
The wireless remote controller can be also used as a thermostat.
* If applicable
33
Factory supplied standard
Outdoor unit
Wireless receiver
(option)
FTC4
Outdoor unit
Main controller
Hydrobox
FTC4
Outdoor unit
Main controller
Hydrobox
FTC4
Outdoor unit
Hydrobox
FTC4
Main controller
Outdoor unit
Hydrobox
FTC4
Hydrobox
Wireless remote controller
(option)
20.0°C
20.0°C
Max. 8
20.0°C
20.0°C
Room
Room temperature
thermistor (option)
Room
Main controller
(remote position)
Room
20.0°C
Room temperature
thermostat
(field supply)
Room