Mitsubishi Heavy Industries FDCW60VNX-W, Installation Manual

Page: 37 / 92

35
Electrical installation
Relay output for emergency mode
NOTE
Mark up any junction boxes with warnings for
external voltage.
When the switch (SF1) is in " " mode (emergency mode) the
circulation pump is activated (EB101-GP12).
CAUTION
No hot water is produced when emergency
mode is activated.
The emergency mode relay can be used to activate external
additional heat. Between the port 2 and 4 is closed during
emergency mode. An external thermostat must be connected to
the control circuit (port 4) to control the temperature. Ensure
that the heating medium circulates through the external
additional heating.
E P 2 3 4
SMO
Externt
X1
External
RC-HY 20/40
RC-HY20/40 X1
If the relay is to be used for control voltage, bridge the supply
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1 0 E P 2 3 4
SMO
Externt
N L
X1
External
RC-HY 20/40
RC-HY20/40 X1
External circulation pump
Connect the external circulation pump (GP10) to terminal
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board (AA2) as illustrated.
8 9 0 1 1 1 2 1 3 1
SMO
Externt
PE
L
N
External
RC-HY 20/40
AA2-X4
GP10
LEK
L N 1 1 0 2 3 4 PE
AA2-X4
RC-HY20/40
AUX inputs
Other external inputs are available on the port 11 through 18
on X2 terminal on RC-HY20.
AUX1, 2, 3, 4, 5, and 6 correspond to the port 11, 12, 13, 15,
16 and 17 respectively. Port 14 and 18 are GND and are
common to the all auxiliary circuit. Connect a sensor or switch
between AUX and GND with a two-core cable with a minimum
cross section of 0.5mm
2
.
LEK
L N 1 1 0 2 3 4 PE
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
X2
AUX1
AUX2
AUX3
GND
AUX4
AUX5
AUX6
GND
13
12
11
19
20
21
14
18
16
17
15
RC-HY20
Select the appropriate function in menu 5.4.
block heating
activate temp lux
not used
soft in/outputs 5.4
not used
not used
not used
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Additional room sensor (BT74) is applied in case user wants
to determine the operation mode (cooling/heating) with a
temperature in a particular room.
This option can be chosen only in case cooling function is
available.
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Temperature sensor BT71 is applied in case additional heater
is placed after 3-way valve (see page 23 for diagram).