Riello 20120391, Instructions For The Installer And For The Technical Support Service

Page: 134 / 188

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