Chiller/Heat Pumps Managment; Enabling The Individual Chiller For The Production Of Sanitary Water; Fancoil Manage; Procedure Before Setting The H I -Tremote Control - MAXA HI-T User's And Installer's Manual

Hi‐T
Centralized controller
point, allowing a cascade operation. In particular, the parameters to be set in a network of the chiller to be configured in a cascade
are:
•
Par 8/44: number of chillers in the network (for cascade operation);
•
Par 9/44: Rotation period (for cascade operation);
•
Par 10/44: (default 2.0 ° C): differential chiller (for cascade operation).
In the case of cascade configuration (Par 8/44 ≠ 0), the set point of each chiller is changed by a multiple value of the parameter Par
10/44 (° C) (differential chiller), according to a step‐decalibration. After each period equal to Par 9/44 minutes, the priorities for the
intervention of the chillers change, by rotating the decalibration of the set point of the chillers, in order to balance the load on the
various machines. If a chiller is in alarm, it is excluded from the regulation. By default Par 8/44=0.
4.3 CHILLER/HEAT PUMPS MANAGMENT
With the remote control Hi‐T, up to 7 MAXA chiller ( i‐HWAK V2/V2+ series and i‐HP series) will run. The main functions regulated
are:
•
ON/OFF controlling;
•
Change of season (summer, winter, summer with sanitary mode, winter with sanitary mode, sanitary mode);
•
Set‐point setting;
•
Display current alarms;
•
Alarm history residing in the keyboard with the date and the time of the event;
•
Access to the parameters of the chiller (password protected);
•
Display of the main statuses of the chiller;
•
Weekly programming in summer, winter, sanitary mode and of the legionella disinfection cycle.
4.3.1 ENABLING THE INDIVIDUAL CHILLER FOR THE PRODUCTION OF SANITARY WATER
Of all the chiller in the network enabled to produce sanitary water, you can choose using the appropriate sub‐menu in "Status
setup", which of these may participate in the sanitary production (see Paragraph 4.6.2). Only those selected will be enabled to the
production of sanitary water, all the others are used exclusively for the plant.
4.4 FANCOIL MANAGE
With the remote control Hi‐T, up to 80 MAXA fancoil with HNS Box, divided into up to 9 zones, will handle. The settings of the fan
coil can be made for individual zones (not for individual units). The main regulation functions are:
‐ ON/OFF (system and / or zone with its scheduler);
‐ Season (system);
‐ Fan speed (of the area);
‐ Dehumidification control.
To the Fan coils is also sent the set‐point of the zone. It is taken into account the adjustment made locally on the knob of the fan
coil.
4.5 PROCEDURE BEFORE SETTING THE Hi‐T REMOTE CONTROL
NOTE: To facilitate the installation phase and the interfacing of the keyboard with the hydronic terminals, it is advisable to supply
the terminal units separately; each terminal unit must be intercepted by its switch.
4.5.1 ADRESSING
During the first start it is necessary to supply each hydronic terminal separately. The phase of addressing is done according to the
following steps:
1. Power on the first fan coil;
2. From the main page of the system, go to "Configuration" ;
3. Enter inside "Service Menu" ;
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