MAXA HI-T, User'S And Installer'S Manual

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Hi ‐ T
Centralized controller
36
Figure 30. Page "Special functions".
The available functions are described in the following paragraphs.
4.12.1 SCREED FUNCTION
By pressing the icon related to the screed function you access to a new menu in which you can choose which units should be
enabled to this function:
Figure 31. Chiller multiple choice, screed function.
Once you choose the chillers which participate to this regulation, the system has the following behaviour:
•
All the heat pumps enabled in the screed function are forced to heat mode.
•
All the heat pumps not enabled in the screed function are forced to off mode.
•
The heat pumps set ‐ point is given by the parameter “Screed function set”, which can be set among the service parameters
( Configuration ‐ > Service menu ‐ > Keyboard ‐ > Par 36/44 : ” Screed function Set” ).
•
The function has a duration given by the service parameter: Configuration ‐ > Service menu ‐ > Keyboard ‐ > Par 37/44 : ”
Duration screed function” . After such period the system returns to the previous settings.
4.13 PASSWORD AND PROTECTIONS
There are more protection and password levels.
An initial distinction includes the following three access levels:
‐ User’s level
‐ Service level
‐ Manufacturer’s level
To each of these three different levels you can access from the “Configuration” screen, previously inserting a dedicated password.
The user’s password, default set to “0”, can be modified by accessing to user’s parameters (see Paragraph 3.6.5.1).
The service’s password can be modified by accessing to service parameters (see Paragraph 3.6.5.2).