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Hi‐T
Centralized controller
7 HNS SYSTEM DESCRIPTION
The HNS system can be coupled only with the following hydronic units:
•
HWF/HWI fan coils;
•
LWF/LWI fan coils;
•
HCA/B and HCA/4B hydronic cassette types;
•
HCN ducted types.
NOTE: the installation with the MI wall mounted types is not possible.
There are 2 ways to install an HNSbox system:
1) Purchase of the DRAL‐NET and the SB modules separately and subsequent installation on the unit at customer's expenses. In this
case, it is possible to install the DRAL‐NET control on the wall in order to make accessible the temperature's knob, which allows an
adjusting of the same within a prefixed control set by the Hi‐T. For example, supposing the ambient temperature set at 20°C (via Hi‐
T), it is possible, by means of the DRAL‐NET's knob, to adjust the set within a given temperature range, such as +/‐5°C, +/‐6°C
(adjusting by parameter), and the like. In this case, the whole installation's procedure is at the installer's expenses. By and large, the
DRAL‐NET is fixed on the wall while the SB interface has to be installed on board. Use a TTL connecting cable (standard provided,
max. length 4m) between the DRAL‐NET and the SB interface:
2) Purchase of the HNSbox where
customer with a terminal board for connecting the hydronic units. In so doing, it is not possible to locally adjust the temperature by
means of the DRAL‐NET device as it is installed inside the BOX. The hydronic units' temperatures and setting parameters can all be
controlled via the Hi‐T panel. As a rule of thumb, the HNSbox (IP56 GW44207 Gewiss box) is installed close to the hydronic unit,
wall built‐in or on the side of the hydronic unit, in case of fan coils with or without body, or upon the false ceiling, in case of
hydronic cassette types or ducted types installed onto the false ceiling:
The Hi‐T control panel allows the visualization of the
single zone.
It is possible to manage up to no.80 hydronic units, divided into no. 9 thermal zones. Every hydronic unit, once set in accordance
with the related belonging zone, uses its own probe as a working probe.
Should the HNS system be coupled with our i‐HWAK/WP V2/V2+ and i‐HP chillers, it is possible to manage, via a single Hi‐T control
panel, n° 7 chillers in cascade and no.80 hydronic units divided into no.9 thermal zones. The connection among the Hi‐T panel, the
minichillers and the hydronic units is very simple: it is made by means of a SSTP (ex. CAT 5) shielded twisted cable connected in
series.
Possible configurations
•
n° 1 Chiller terminal units not connected
, inside, the DRAL‐NET and the SB devices are already fitted and pre‐wired, thus providing the
working parameters of every single hydronic unit and those of every
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