37
Electrical installation
t "69PVUQVUT
External output is available on the port 15 to 17 on X4 terminal
on AA2 board on RC-HY20. The relay output can have a max
load of 2A at resistive load.
4
1
5
1
6
1
7
1
SMO
Externt
External
RC-HY 20
AA2-X4
LEK
L N
1
1
0
2 3 4
PE
AA2-X4
RC-HY20
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 15 and 16. During normal operation, the port 15 and
17 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 15 and 16. 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 31.
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 23 for diagram).
Connect the circulation pump as shown below using the port
15 and 16 on X4 terminal.
4
1
5
1
6
1
7
1
SMO
Externt
L
L
N
N
PE
PE
External
RC-HY 20
AA2-X4
LEK
L N
1
1
0
2 3 4
PE
AA2-X4
RC-HY20
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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