Mitsubishi Electric PAC-IF051B-E Installation Manual page 17

4. Electrical work

2-zone temperature control

Control option A

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

controller and a locally supplied thermostat.

The wireless remote controller is used to monitor the Zone1 room temperature and the

thermostat is used to monitor the Zone2 room temperature.

The thermostat can be also allocated to Zone1 and the wireless remote controller to

Zone2.

The wireless remote controller can be also used to make changes to the space heating

settings, boost DHW (*1) and switch to holiday mode without having to use the main

controller.

If more than one wireless remote controller is used, the last temperature setting

adjustment/demand will be applied to ALL rooms in same zone.

Wire the wireless receiver to FTC4 (Master) 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 control-

ler installation manual.)

The thermostat is used to set the maximum temperature for heating Zone2 room.

The thermostat is wired to IN6 on FTC4 (Master). (If the thermostat is allocated to

Zone1, it is wired to IN1 on TBI.1.) (Refer to 4.5.)

Control option B

This option features the main controller, the Mitsubishi Electric thermistor and a locally

supplied thermostat that are wired to FTC4 (Master).

The thermistor is used to monitor the Zone1 room temperature and the thermostat is

used to control the Zone2 room temperature.

The thermostat can be also allocated to Zone1 and the thermistor to Zone2.

The thermistor can not make any changes in control operation. Any changes to DHW

(*1) must be made using the main controller mounted on the FTC4 (Master).

Wire the thermistor to the TH1 connector on FTC4 (Master).

The number of room temperature thermistors that can be connected to FTC4 (Master) is

always one.

The thermostat is used to set the maximum temperature for heating Zone2 room.

The thermostat is wired to IN6 on FTC4 (Master). (If the thermostat is allocated to

Zone1, wire it to IN1 on TBI.1.) (Refer to 4.5)

Control option C

This option features the main controller (with in-built thermistor) that is removed from

the FTC4 (Master) to monitor the Zone1 room temperature and a locally supplied ther-

mostat to monitor the Zone2 room temperature.

The thermostat can be also allocated to Zone1 and the thermistor to Zone2.

A thermistor built into the main controller can be used for monitoring the room tempera-

ture for Auto Adaptation function whilst keeping all its features of the main controller

available.

The main controller and FTC4 (Master) 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 be detached from

the FTC4 (Master). Otherwise it will detect the temperature of the FTC4 (Master) in-

stead of room temperature. This will affect the output of the space heating.

The thermostat is used to set the maximum temperature for heating Zone2 room.

The thermostat is wired to IN6 on FTC4 (Master). (If the thermostat is allocated to

Zone1, wire it to IN1 on TBI.1.) (Refer to 4.5.)

Control option D

This option features the locally supplied thermostats wired to FTC4 (Master). The ther-

mostats are individually allocated to Zone1 and Zone2. The thermostats are used to

set each maximum temperature for heating Zone1 and Zone2 rooms. Any changes to

DHW (*1) must be made using the main controller mounted on the FTC4 (Master).

The thermostat for Zone1 is wired to IN1 in TBI.1 on FTC4 (Master).

The thermostat for Zone2 is wired to IN6 in TBI.1 on FTC4 (Master).

*1 If applicable

*2 For the options above, the sensor types can be exchanged between Zone1 and Zone2. (e.g. Wireless remote controller in Zone1 and Room temp thermostat in Zone2 can

be changed to Room temp thermostat and wireless remote controller, respectively).

Also, the wireless remote controller can be used to function as a thermostat as well, if required.

Wireless receiver

(option)

FTC4

(Master)

Outdoor unit

Main controller

Zone1: Room temp. control (Auto adaptation)

Zone2: Compensation curve or flow temp. control

FTC4

(Master)

Outdoor unit

Main controller

Zone1: Room temp. control (Auto adaptation)

Zone2: Compensation curve or flow temp. control

FTC4

(Master)

Outdoor unit

Zone1: Room temp. control (Auto adaptation)

Zone2: Compensation curve or flow temp. control

FTC4

(Master)

Main controller

Outdoor unit

Zone1, Zone2: Compensation curve or flow temp. control

Wireless remote controller

(option)

20.0°C

Max. 8

20.0°C

Zone1

20.0°C

Room temperature

thermostat

(field supply)

Zone2

Room temperature

thermistor (option)

Zone1

20.0°C

Room temperature

thermostat

(field supply)

Zone2

Main controller

(remote position)

Zone1

20.0°C

Room temperature

thermostat

(field supply)

Zone2

Room temperature

thermostat

(field supply)

Zone1

20.0°C

Room temperature

thermostat

(field supply)

Zone2

1