MAXA HI-T User's And Installer's Manual page 32

In the configuration pages on the chronothermostat colourful time‐lines appear: the blue time‐line indicates normal operation, the
green time‐line indicates the economical operation, the red time‐line indicates the time in which the legionella cycle it is
programmed (thus the machine in that condition may be active even if the scheduler is set to Off).
4.6.5.2 WEEKLY PROGRAMMING FAN COIL ZONE
In a similar way to the scheduling of chillers, a weekly program of each zone can be set (independently between summer and
winter), with minimum steps of 15 minutes.
The possible settings are:
•
Off zone;
•
Normal operation zone (normal ambient set‐point);
•
Economical function zone (economic ambient set‐point).
Going in "Summer Zone" or "Winter Zone" the list of all zones set is shown. At this point you need to choose the area you want to
set; the configuration procedure on the chronothermostat is then equal to that one previously reported for the chiller. The features
and the functionalities of the page are identical to those already described.
4.6.5.3 WEEKLY PROGRAMMING SANITARY WATER PRODUCTION
In a similar way to what is reported for the settings on the chronothermostat of chillers and fan coils, you can define when to enable
the production of sanitary hot water (by setting the individual days of the week, with a minimum step of 15 minutes). The settings
that you can do are:
•
Normal: Enable function;
•
Off: Disabled function.
To set the programming, go to "Programs" ‐> "Sanitary" (the word "Sanitary" appears only if you have enabled the sanitary mode:
System Main ‐> Configuration ‐> Service menu ‐> Parameters ‐> Chiller ‐> Chiller name ‐> H10: Sanitary presence = 1).
The procedure for configuring the programmable chronothermostat is therefore similar to those described above, with the only
difference that the choice of the operation is only between "Normal" and "Off" (see figure below).
In the period when the function is active, the machines enabled to produce sanitary water are placed in the seasonal operation of
the plant scheduled by the plant scheduler with the addition of the sanitary mode, that is, respectively:
•
Summer + sanitary
•
Winter + sanitary
•
Only sanitary
4.6.5.4 LEGIONELLA DISINFECTION WEEKLY PROGRAM FUNCTION
If the sanitary function is enabled (from system main page ‐> Configuration ‐> Service menu ‐> Parameters ‐> Chiller ‐> Chiller name ‐
> H10: Sanitary presence = 1), you can program the hours of the individual days of the week for activating the cycle of anti‐
legionella disinfection.
You select only the starting time (with 15 minutes steps), since the duration of the cycle is defined by a parameter with maintainer
access rights (System main page ‐‐> Configuration ‐> Service menu ‐> Parameters ‐> Keyboard ‐> Par 31/44: Legionella disinfection
enable time).
To carry out the programming you must enter into "Programs" ‐> "Legionella disinfection"; the procedure is simple because you
have to select only the starting day and hour for the cycle (see Figure below).
31
Figure 26. Chronothermostat, "Sanitary" page.
Hi‐T
Centralized controller