41
Electrical installation
AUX outputs
External output is available on the port NC, NO and C on X7
terminal on AA3 board on RC-HY40. The relay output can
have a max load of 2A at resistive load.
SMO
Externt
654321
1 0 PE
A1
A2
A1
A2
A1
-K1 -K2 -K3
A2
External
RC-HY 40
AA7-X2
X1
LN 1 1 0 23 4PE
123 4
LEK
1 2 3 4
X1
11NL 0 EP234
-X2
1
1234 56
23456
-X1
AA7-X2
RC-HY40
Following functions are available. Select the function in menu
5.4.
Indication of buzzer alarm
When an alarm occurs, the circuit becomes closed between
the port NO and C. During normal operation, the port NC
and C is closed.
Cooling mode indication / Active cooling mode (4-pipe
cooling)
When the system turns into cooling mode, the circuit
becomes closed between the port NO and C. By using this
signal, it is possible to switch 3-way valve for 4-pipe cooling
or to assemble a display circuit indicating cooling mode. For
details of connecting the 3-way valve, refer to page 32, 33.
External pump control (GP10)
External pump (GP10) is used in case additional heater is
placed after 3-way valve that switches heating/hot water
(refer to page 24).
Connect the circulation pump using the port NO and C on
X7 terminal on AA3 board as shown below.
CNONC
Externt
SM O
L
PE
N
N
PE
L
External
RC-HY 40
AA3-X7
AA3-X7
RC-HY40
Hot water circulation pump control (GP11)
In case the distance between hot water tap and hot water
storage tank is far, the hot water supply line temperature is
likely to drop and it may take time to supply hot water from
the tap. In that case, hot water circulation pump (GP11) is
applied to maintain hot water supply line temperature warm
(refer to page 20 for diagram).
For details of connecting the pump, refer to External pump
control (GP10).
NOTE
Mark up any junction boxes with warnings for external
voltage.
myUpway
™
Connect the network connected cable (straight, Cat.5e UTP)
with RJ45-contact (male) to contact AA4-X9 on the display
unit (as illustrated). Use the cable grommet (UB2) in the
control module for cable routing.
AA4-X9-
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