135
CONTROL PANEL
INSTALLATION
3.5.1 Dry contacts
ON/OFF CONTACTS
On/Off contacts and cooling/heating contacts are configured as follows:
Parameter
Description
Off
Cooling
Heating
Auto
ON_OFF_SW
On/Off contact *
open
closed
closed
open
HC_SW
Cooling/heating contact
open
open
closed
closed
*Please note that for cooling only circuits, the configuration applicable is the ON/Off contact one.
Off
:
The unit is stopped.
Cooling
:
The unit can be started in Cooling mode.
Heating
:
The unit can be started in Heating mode (heat pumps only).
Auto
:
The unit can operate in Cooling or heating mode according to the switching values. If the auto-switching is
enabled ("Heat/Cool Selection [HC_SEL]" parameter of the "GENUNIT" menu), the operation mode is selected
according to OAT.
SETPOINT SELECTION CONTACTS
This input with dry contact is used to switch the setpoints. It is active only when the control is in Remote mode.
Parameter
Description
Cooling
Heating
Stp 1
Stp 2
Stp 1
Stp 2
SP_SW
Setpoint selection contact
open
closed
open
closed
SELECTION CONTACTS OF THE DEMAND LIMIT
To limit the unit capacity, it is possible to use three demand limit phases based on two dry contacts.
Parameter
Description
100%
Limit 1
Limit 2
Limit 3
LIM_SW1
Demand limit switch 1
open
closed
open
closed
LIM_SW2
Demand limit switch 2
open
open
closed
closed
Please note that when LIM_SW1 is closed, the electric heating is disabled.
Summary of Contents for 20120391
Page 93: ...93 PANORAMICA DEI PARAMETRI INSTALLAZIONE ...
Page 169: ...169 ALARM CODES INSTALLATION ...
Page 185: ...185 OVERVIEW OF THE PARAMETERS INSTALLATION ...
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Page 187: ......