Herz STOCKHOLM, Инструкция, Страница: 1 / 26

HERZ HIU STOCKHOLM
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HERZ Heat Interface Unit
HIU STOCKHOLM
Instruction for operators and plumbers , Issue 0419
Description
The HERZ Stockholm Heat Interface Unit (HIU) provides domestic hot water and space heating to
properties that are serviced from district heating or central boiler plants. The HIU comprises of two
heat exchangers, one for the DHW providing instant hot water at a safe regulated temperature and the
second for the space heating. The HIU is indirect so the primary heating circuit is hydraulically
separated from the property space heating by the second plate heat exchanger.
Pipe connection to an HIU is realised by means of ball valves. Connection of the pipe work with the
HIU is possible from the floor or from the top with a separate top entry bracket.
Main Features:

Instantaneous hot water and space heating to properties

Twin heat exchangers provide hydraulic separation

Thermostatic hot water temperature control

Tempering valve to prevent risk of scalding

Pressure temperature control valve allows DHW heat exchanger to operate on demand only

Hot water priority valve maximises primary flow to DHW heat exchanger by stopping the
supply to the space heating heat exchanger when a hot tap is opened

”Summer bypass” valve maintains a minimum primary temperature when space heating is not
in use

Low primary return temperature maximises system efficiency

Suitable for radiators heating

Primary Return with Differential Pressure Control Valve

110mm Spool piece provided for water meter

18mm stainless steel pipe work

Strainer with fine-mesh screen in primary flow

Strainer with fine-mesh screen in return flow of space heating circuit

Strainer with fine-mesh screen in cold water inlet
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