134
CONTROL PANEL
INSTALLATION
3.5
Terminal block connections
9
The connections available on the user terminal board may vary according to the options selected when making an order.
9
Some contacts are accessible only when the unit operates in Remote mode.
The table below shows the connections to the user's terminal board.
Description
Board
Connector /
Input / Output
Terminal
Notes
On/Off switch
SIOB (1)
-
32-33
Used for the unit on/off control only (Remote
mode)
Second Setpoint switch
SIOB (1)
-
65-66
Used to switch from one setpoint to the other
Limit switch no.1
SIOB (1)
-
73-74
Used to control the demand limit
Limit switch no.2
SIOB (1)
-
75-76
Used to control the demand limit
Heat/Cool selection
SIOB (1)
J3 / DI-06
-
Used to switch from cooling to heating and
vice versa when the unit is in
Remote mode (heat pump only)
Desuperheater switch
SIOB (1)
J3 / DI-07
-
Heat recovery is allowed
Analogue limitation
SIOB (1)
-
43-44
4-10 mA input for setpoint reset
Water pump no.1
SIOB (1)
J6 / IN03-DO-03 -
The control can adjust one or two evapora-
tor pumps and automatically switch the two
pumps
Water pump no.2
SIOB (1)
J6 / IN04-DO-04 -
As above
Operation relay
SIOB (1)
J23 / DO-05
-
It indicates whether the unit is ready to be
started or is running
Alarm relay
SIOB (1)
J22 / DO-06
-
It indicates the alarms
Electric heating (NXC 044-084; NXH 044-080)
Stage no.1 of electric
heating
AUX1 (1)
-
51-52
Used to manage the electric heating stage (1)
Stage no.2 of electric
heating
AUX1 (1)
-
53-54
Used to manage the electric heating stage (2)
Step no.3 of electric
heating
AUX1 (1)
-
55-56
Used to manage the electric heating stage (3)
Step no.4 of boiler or
electric heating
AUX1 (1)
-
57-58
Used to manage the boiler heating or electric
heating step (4)
Electric heating (NXC 096-164; NXH 084-164)
Stage no.1 of electric
heating
SIOB (2)
-
51-52
Used to manage the electric heating step 1
Stage no.2 of electric
heating
SIOB (2)
-
53-54
Used to manage the electric heating step 2
Step no.3 of electric
heating
SIOB (2)
-
55-56
Used to manage the electric heating step 3
Step no.4 of boiler or
electric heating
SIOB (2)
-
57-58
Used to manage the boiler heating or electric
heating step 4
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