1592015820 User manual IC260_261L_D DUO FW1.9 rel. 1.0
Pag. 88 of 149
FS49=1
Example for machine with 3 compressors
Sanitary water heaters:
Sanitary water is produced using mainly the compressors; the sanitary water heaters are only used to
produce sanitary water if one or more compressors are not available for regulation (due to an alarm of a
compressor, activation of the unloading function,..) or if the sanitary water set-point is not reached within a
configured timeframe (described in greater detail below).
The FS08 parameter allows you to determine if the sanitary water heaters can be used when a compressor
is not available.
When the sanitary heaters are activated, the regulation band is divided according to the number of
compressors and sanitary heaters available (see figure below).
Max time for reaching the sanitary water set-point
A counter determines the maximum time for reaching the sanitary water set-point as from the moment the
production of sanitary water is requested; once this time has elapsed (parameter FS09) there are 2 options:
If FS07=0, enable all the compressors (if not already enabled)
If FS07=1, enable all the compressors and all the heating elements
After all the available steps (compressors and heaters) have been enabled, they remain activated until the
sanitary water set-point has been reached. At which point the heating elements are switched off immediately,
while the compressors are switched off in order, with a CO03 delay between each one.
In the event of sanitary water probe 1 faulty (the sanitary water regulation probe), the sanitary water function
is stopped and disabled; the controller will regulate normally in chiller or heat pump mode.
In the event of sanitary water probe 2 faulty (not involved in the regulation), the alarm is signalled without
affecting heat regulation in any way; sanitary water will continue to be produced normally even if the display
probe is not working properly.
If there is an error with the heat regulation probe (for the chiller or heat pump) during production of sanitary
water, the machine will continue to operate but the regulation of the chiller or heat pump is disabled and
sanitary water continues to be produced.
