User manual

1592022700 User manual iCHILL 200CX Rel. 1.0 22/04/2009
Select with UP or DOWN the trEM function
Push SET the trE1 or trE2 label is shown on the bottom display, the top display shows the probe value.
Use the UP or DOWN arrow to change beteween trE1 or trE2 read-out.
To exit to the normal display read-out push MENU or wait the time – out time.
ATTENTION:
THE trEm function and the labels trE1 or trE2 appear only if the CF47=1 (remote panel 1 configuration) or if the parameter CF48 = 1
(remote panel 2 configuration).
13 CHILLER / HEAT PUMP SELECTION
The CF52 parameter allows to select and enable the running mode:
Par. CF52= 0: Through keyboard; the user can start and stop the unit using the keys of the front panel.
Par. CF52 = 1: Through digital input programmed as start/stop the unit from remote control.
• this selection is enabled if there is one digital input configured as start/stop from remote (remote chiller / heat pump). If any of the
digital input is not configured as “remote chiller/heat pump”, the unit remains in stand–by.
• if a digital input is configured as “o2” (“remote chiller/heat pump” active if the contact is open) when the digital input is open the unit
works in chiller mode, when the digital input is closed the unit works in heat pump mode
• if a digital input is configured as “c2” (“remote chiller/heat pump” active if the contact is closed) when the digital input is open the
unit works in heat pump mode, when the digital input is closed the unit works in chiller mode
• the working mode selection (chiller / heat pump) from keyboard is disabled; it is possible to switch-off the unit (std-by mode) or
switch-on the unit in the working mode selected by digital input
Par. CF52 =2: Automatic selection of the Chiller - Heat Pump through analogue input
The analogue input selection or change over function overrides the selection of the working mode (chiller / heat pump) by digital input. If
the external air temperature are within the ST13 differential, the user can change the running mode from the keyboard.
If the unit is running with CF52 = 1 or CF52=2, and it is requested a running mode change, the controller turns off all the outputs, starts
a fixed delay time signalled by the chiller or heat pump blinking led. This blinking led indicates which running mode will be activated after
the compressor delay time protection.
To change the running status the following condition must be respected otherwise the unit remains in stand - by:
1. CF02=3 (chiller and heat pump unit)
2. CF52=2 and a NTC probe configured as NTC external air temperature for dynamic setpoint/ boiler / change over
3. This probe is working properly.
Parameters involved with the change over function:
ST12 Change over Setpoint. If the analogue input control (from probe) function is enabled, it represents the limit temperature of the
probe value under which the unit runs the Heat Pump mode.
ST13 Change over Differential. If the analogue input control (from probe) function is enabled, it represents the limit differential
temperature of the probe value to restart in the Chiller mode.
For external air temperature within ST13 the user can manually change the status from keyboard.
GRAPH: AUTOMATIC CHANGE OVER
Operation mode selection by keyboard:
CF51 = 0: pushing key the unit starts in chiller, pushing key the unit starts in heat pump
CF51 = 1: pushing key the unit starts in heat pump, pushing key the unit starts in chiller
Operation mode selection by probe:
CF51 = 0 External air temperature probe > ST12+ ST13
the unit starts in chiller, External air temperature probe < ST12 the unit
starts in heat pump.