1592015820 User manual IC260_261L_D DUO FW1.9 rel. 1.0
Pag. 93 of 149
the sanitary water circulation pump is switched on
after a delay of FS27 seconds the sanitary water valve 1 is switched on
after the FS10 delay the sanitary water valve 2 is switched off
The following two cases could occur during the production of sanitary hot water:
The sanitary water set-point is reached when the chiller is working (the chiller set-point is not
reached):
the sanitary water valve 2 is switched on
after the FS10 delay the sanitary water valve 1 is switched off
after a delay of FS28 seconds the sanitary water circulation pump is switched off
At the end of this phase, if necessary, the machine continues to regulate in chiller mode.
The regulation temperature reaches the chiller set-point (parameter ST01) and the sanitary hot
water production is working:
the sanitary water circulation pump stays on
the sanitary water valve 2 is switched on
after the FS10 delay the sanitary water valve 1 and 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 again to produce hot sanitary water
after the FS11 delay from the 4-way valve switching, the sanitary water valve 1 is switched
on
after the FS10 delay the sanitary water valve 2 is switched off
Once the sanitary water set-point is reached:
the sanitary water valve 2 is switched on
after the FS10 delay sanitary water valve 1 is switched off
after FS28 seconds the sanitary water circulation pump and the compressors are
switched off
after the dF08/2 delay the status of the 4-way valve is reversed
If the sanitary water production is working and the temperature detected by the chiller regulation
probe is greater than ST01+ST07 (cold water required), the sequence of operatiuon is the
following:
the sanitary water pump will remain on
the sanitary valve 2 is switched on
after the FS10 delay the sanitary water valve 1 is switched off
the compressors are switched off
after the DF08/2 delay the 4-way valve status is reversed
after a delay of dF08/2 the compressors are switched on to produce chilled water and
sanitary water
When the sanitary water set-point is reached:
sanitary water valve 2 is switched on
after the FS10 delay the sanitary water valve 1 is switched off
after a delay of FS28 seconds the sanitary water circulation pump is switched off
b) None of the compressors are switched on for the production of chilled water
In this case, the cycle is reversed as follows:
the 4-way valve status is reversed
after dF07/2 the compressors are switched on
the sanitary water pump switches on after the FS11 delay from start-up of the compressors
after a delay of FS27 seconds the sanitary water valve 1 is switched on
after the FS10 delay the sanitary water valve 2 is switched off.
Once the sanitary water set-point is reached, the sequence of operation is the following:
the sanitary valve 2 is switched on
after the FS10 delay the sanitary water valve 1 and the compressors are switched off
after a delay of FS28 seconds the sanitary water circulation pump is switched off
