Mitsubishi Heavy Industries HMK60, Installation Manual

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48
Electrical installation
• Temperature sensor BT71, return pipe
The temperature sensor BT71 is placed on the return pipe line
for water heater. Connect the port 17 and 18 on X6 terminal on
AA3 board on RC-HY40 to the port BT71 on X1 terminal on
HMK100.
RC-HY
X1
X1
BT71
15
16
17
1
1
8
11
12
13
4
AA3-X6
RC-HY40
AA3-X6
HMK100
• Temperature sensor BT64, outlet for cooling
The temperature sensor BT64 is placed on the supply line for
cooling. For connection, see page 54, AUX inputs.
Optional connections
RC-HY20
Room sensor BT50
Room sensor can be connected to controller.
The room temperature sensor has up to three functions:
1. Show current room temperature in the control module
display.
2. Option of changing the room temperature in °C.
3. Makes it possible to change/stabilise the room temperature.
Install the sensor in a neutral position where the set temperature
is required. A suitable location is on a free inner wall in a hall
approx. 1.5 m above the fl oor.
Do not install the sensor where correct room temperature
cannot be detected such as in a recess, between shelves, behind
a curtain, above or close to a heat source, in a draft from an
external door or in direct sunlight.
Closed radiator thermostats can also cause problems.
The control module can operate without the sensor, but if user
wants to read off the accommodation's indoor temperature in
controller display, the sensor must be installed.
Connect the room sensor to the port 7 and 10 on X2 terminal.
If the sensor is to be used to change the room temperature in
°C and/or to change/stabilise the room temperature, the sensor
must be activated in menu 1.9.4.
If the room sensor is used in a room with underfl oor heating, it
should only have an indicatory function, not control of the
room temperature.
9
10
11
6
8
7
External RC-HY 20
X2
BT50
RC-HY20
X2
CAUTION
Changes of temperature in accommodation
take time. For example, short time periods in
combination with underfloor heating will not
give a noticeable difference in room temperature.
Use two-core cable with a minimum 0.5mm
2
cross section.