Mitsubishi Heavy Industries FDCW100VNX-A, Technical Manual

Page: 110 / 315

Installation
'19 • HM-T-340
Indoor unit installation
Sensor
Sensor connection is different according to the combination of
indoor unit and controller. Refer to the appropriate combination
mentioned below.
Use two-core cable with a minimum 0.5mm
2
cross section.
Regarding other sensors not mentioned in this chapter, refer to
page 107, Option connections.
<RC-HY40
-W
with HSB series>
• Ambient air temperature sensor BT1
Install ambient air temperature sensor (BT1) in the shade on a
wall facing north or north-west, so it is unaffected by the
morning sun for example.
Connect the sensor to the port 1 and 2 on X6 terminal on AA3
board.
If a conduit is used it must be sealed to prevent condensation
in the sensor capsule.
t
1
2
3
4
5
6
7
8
AA3-X6
BT1
RC-HY40-W
AA3-X6
• Hot water charging sensor BT6 (tank bottom)
The temperature sensor, hot water charging (BT6) is placed in
the submerged tube on the water heater.
Connect the sensor to the port 7 and 8 on X6 terminal on AA3
board.
Hot water charging is activated in menu 5.2 or in the start
guide.
6
7
8
9
10
11
12
13
AA3-X6
BT6
RC-HY40 -W
AA3-X6
• Hot water sensor BT7 (tank top)
A temperature sensor for hot water top (BT7) can be connected
to RC-HY40 -W to show the water temperature at the top of
the tank (if it is possible to install a sensor at the top of the
tank). Connect the sensor to the port 15 and 16 on X6
terminal on AA3 board.
11
12
13
14
15
16
17
18
AA3-X6
BT7
RC-HY40 -W
AA3-X6
• Temperature sensor BT63, outlet at additional heater
This sensor is used in case electric heater is placed before 3-
way valve (QN10) for switching heating/ hotwater (see page
285 for diagram).
For connection, see page 99, AUX inputs of RC-HY20.
• Temperature sensor BT25, outlet for heating
This sensor is used in case electric heater is placed after 3-way
valve (QN10) for switching heating/ hot water (see page 286
for diagram).
Connect temperature sensor, external supply line (BT25) to the
port 5 and 6 on X6 terminal on AA3 board.
4
5
6
7
8
9
10
11
AA3-X6
BT25
RC-HY40 -W
AA3-X6
• Temperature sensor BT71, return line for heating
This sensor is used in case electric heater is placed after 3-way
valve (QN10) for switching heating/ hot water (see page 286
for diagram).
Connect temperature sensor, external return line (BT71) to the
port 17 and 18 on X6 terminal on AA3 board.
11
12
13
14
15
16
17
18
AA3-X6
BT71
RC-HY40 -W
AA3-X6
• Temperature sensor BT64, outlet for cooling
This sensor is used in case cooling application is required. For
connection, see page 101, AUX inputs of RC-HY20
-W .
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RC-HY40-W External
RC-HY40-W External t
RC-HY40-W External
t
RC-HY40-W Externa
t
l
RC-HY40-W Externa
t
l
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