Emerson Dixell iChill IC207D - DOMESTIC HOT WATER PRODUCTION: VALVES IN WATER CIRCUIT ___ FS01=1 (AIR;WATER, WATER;WATER UNIT)

1592015610 User manual IC200D EVO GB rel1.0 10.11.2015_rev10 IC200D 98/192
38.4 DOMESTIC HOT WATER PRODUCTION: VALVES IN WATER CIRCUIT ___
FS01=1 (AIR/WATER, WATER/WATER UNIT)
- Domestic hot water operation when the unit is producing hot water 38.4.1
When domestic hot water production is required (and it has priority), the sequence of operation is the
following:
 the domestic hot water pump is switched on
 after a delay of FS27 seconds, domestic hot water valve 1 is swithed on
 after a delay of FS10 seconds the domestic hot water valve 2 is switched off
Domestic hot water is produced until the FS03 set-point is reached.
Once the domestic hot water set-point is reached, the sequence of operation is the following:
 domestic hot water valve 2 is switched on
 after a delay of FS10 seconds the domestic hot water valve 1 is switched off
 after a delay of FS28 seconds the domestic hot water circulation pump is switched off
Condenser fans are managed normally.
The defrost takes priority over the production of domestic hot water.
If the controller determines the need for a defrosting cycle during the production of domestic hot water, the
Ichill stops the domestic hot water operation to activate the defrost procedure:
 all compressors and heaters are stopped
 the domestic hot water valve 2 is switched on
 after the FS10 delay domestic hot water valve 1 is switched off
 after a delay of FS28 seconds the domestic hot water pump is switched off
The defrost can now start as per the normal procedure.
At the end of the defrosting cycle:
 If there is a need to produce domestic hot water, the compressors and any heating elements will be
switched on. After the FS11 delay from the end of the dripping phase, domestic hot water valve 1 is
switched on and, after the FS10 delay, domestic hot water valve 2 is switched off.
 If there is no need to produce domestic hot water, the controller continues with normal heat regulation.
- Domestic hot water operation when the unit is producing cold water 38.4.2
When the production of domestic hot water is required (and it has priority), it is necessary to reverse the
cycle as follows:
 the compressors are switched off
 after the dF07/2 delay the 4-way valve status is reversed
 after dF07/2 the compressors are switched on
 after a delay of FS27 seconds valve 1 is switched on
 after the FS10 delay the domestic hot water valve 2 is switched off
The production of domestic hot water stops once the set-point is reached and it will be possible to return to
produce cold water (if needed):
 the compressors are switched off
 the valve 2 is switched on
 after the FS10 delay the domestic hot water valve 1 is switched off
 after a delay of FS28 seconds the domestic hot water circulation pump is switched off
 after a delay of dF08/2 the 4-way valve status is reversed
 after a delay of dF08/2 the compressors are switched on as per normal if required by the chiller
regulator