Technical data

Ichill 200CX EVO rev 1.1 14/11/2013
Pag. 76 of 151
40. PRODUCTION OF DOMESTIC HOT WATER
The domestic hot water production is enabled when the machine is switched on and disabled if the machine
is OFF or in STAND-BY.
The Ichill has to be configured for the proportional regulation (St11=0) and not in neutral zone.
In case of machine with valve 1 and valve 2 in gas circuit and cooling and domestic hot water active at the
same time, the number of compressors to use is determined by CO78 parameter.
Two temperature probes need to be configured when the function is enabled:
• Probe 1: it is used to determine the temperature of the domestic hot water
• Probe 2: it can be used to stop the domestic hot water production for high temperature. As an alternative
to Probe 2 it is possible ti choose another probe setting FS48 parameter.
Configurable proportional band and set-point are used to regulate the production of domestic hot water;
when the domestic hot water function is enabled, you will see
symbol lighted on the display.
The production of domestic hot water can only be requested when the temperature detected by Probe n°1 is
below the FS03 set-point – band FS04; all the compressors are called into action when the function is
enabled.
The domestic hot water set-point can be viewed and modified on the display by pressing the SET button.
It is possible to set a minimum temperature under which the domestic hot water heaters are switched on (low
temperature protection).
It is possible to use a second domestic hot water set point by time schedule (parameters ES19..ES33,
internal clock is necessary) or by digital input (opportunely configured).
Inside the time band or when the digital input is active, to the set point is applied an offset determined by
ES32 parameter and the new differential is ES33.
Compressors regulation:
- FS49=0 the compressors are switched on when sanitary temperature < FS03 (domestic hot
water set point) – FS04 (proportional band); all the compressors are switched on with a delay of
CO03 seconds each other
- FS49=1 the proportional band is divided by the number of compressors; at every step
(proportional band/number of compressors) a compressor will be switched on
• FS49=0 Example for machine with 3 compressors