THERMAL INTEGRATION DATA Extra HIU, Руководство по установке

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The DATA Extra HIU, Installation Instructions DE2, 12th August 2021
Important Installation Requirements
Components in the HIU, pipes and radiators may reach high temperatures. The HIU is designed for heat distribution networks
with water temperatures up to 95°C. The pipes and parts in the HIU as well as pipes and radiators in the heating system can also
reach this temperature. Contact can lead to burns.
Central Heating
When installing the HIU, the following conditions must be observed (see the following diagrams):
1. The heating installation must be equipped with a correctly sized expansion vessel and safety relief valve fitted between the HIU and
any isolation valve on the heating circuit.
2. It is advisable to fit a filling loop and pressure gauge to the heating system, in a location convenient for the end user to access and top
up the central heating system.
3. The heating system must be equipped with a WRAS approved over pressure safety relief valve (rated to 3 bar), fitted between the HIU
and any isolation valve on the heating circuit.
4. A heating control valve must not be installed in the heating circuit. The room thermostat should, if used, be connected to the room
thermostat cable of the HIU.
5. Before the unit is commissioned, the central heating circuit must be fitted with an automatic bypass valve to maintain a minimal flow
rate and regulate pressure across the system. The valve must be installed between the central heating flow and return, noting the
direction of flow. The automatic bypass must be fitted before any isolation valve on the heating circuit.
NOTE For optimal energy efficiency and comfort, it is of the utmost importance to hydraulically balance the CH system correctly. For
the same purpose it is advisable to design the CH system in such a way that the CH return temperatures are as low as possible.
* Artificially softened water must not be used to fill the central heating system
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DHW Recirculation Unit
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