Compressor Regulation - Emerson Dixell iChill IC200D EVO Series Installing And Operating Instructions


This selection is enabled if there is one digital input configured as start/stop from remote (remote chiller /
heat pump). I non of the digital input are configure the unit remains in stand–by.

The "open" status of the input forces the chiller running mode.

The "closed" status of the input forces the heat pump running mode.

The keyboard selection is disabled.

The key on the front panel can start/stop the unit only with the digital input selection
Par. CF59 =2: Automatic selection of the Chiller - Heat Pump through analogue input
The analogue input selection or change over function overrides the digital input C-HP function. If the external
air temperature are within the CF81 differential, the user can change the running mode from the keyboard.
If the unit is running with CF79 = 1 or CF79=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.
13.2 CHANGE OVER
CF60 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.
CF61 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 CF81 the user can manually change the status from keyboard.
GRAPH: AUTOMATIC CHANGE OVER
13.3 KEYBOARD SELECTION
CF58 = 0: pushing key the unit starts in chiller, pushing
CF58 = 1: pushing key the unit starts in heat pump, pushing
13.4 ANALOG INPUT SELECTION
CF58 = 0 NTC, External air temperature probe > CF60+ CF61
temperature probe < CF60
CF58 = 1 NTC, External air temperature probe > CF60+ CF61
temperature probe < CF60

14. COMPRESSOR REGULATION

CF74 Working mode of the compressor
0 = chiller and heat pump
1 = only chiller
2 = only heat pump
It is possible to decide how many compressors are used in chiller, heat pump and domestic hot water
production.
o
parameter CO76: number of compressors to use in chiller
o
parameter CO77: number of compressors to use in heat pump
o
parameter CO78: number of compressors to use in domestic hot water
1592015610 User manual IC200D EVO GB rel1.0 10.11.2015_rev10
the unit starts in heat pump.
the unit starts in heat pump.
key the unit starts in heat pump
key the unit starts in chiller
the unit starts in chiller, NTC, External air
the unit starts in chiller, NTC, External air
0
IC200D
2
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