3 System description
Combi Port XS is a prefabricated heat interface unit (HIU) suited for
use in single family houses. The ready-to-install unit supplies
domestic hot water, controls the domestic heating and measures the
heating energy as well as cold water consumption.
In the Combi Port XS unit, the cold water is heated only when
required following the flow-through principle with a stainless steel
high performance plate heat exchanger. This always ensures a low
return temperatures on the heating water. The energy is supplied by
heating water with a flow temperature of at least 55 °C via the heating
water flow.
Domestic hot water:
The domestic hot water is generated only on
demand. A mechanical proportional quantity control valve is
controlling the process. As more hot water is required, as more the
valve is opening the flow of the heating water through the heat
exchanger. This ensures a constant hot water temperature. If no hot
water is needed, the valve stops the supply of hot water through the
heat exchanger. It can cool down which is beneficial for the hygiene.
Domestic heating:
Combi Port XS manages independently the
hydraulic balancing between hot water and heating. The room
temperature control is carried out in the heating system.
3.1 Operating principle
SD0000105
WZ
FIL
3.2 Connection description
A
C
D
E
F
G
H
SD0000133
B
Item
Description
A
Cold water to apartment (CW)
B
Warm tap water with circulation (optional)
C
Cold water from riser (CW) (optional)
D
Domestic hot water to apartment (DHW)
E
Heating return (primary)
F
Heating supply (primary)
G
Heating return (secondary)
H
Heating supply (secondary)
6
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Combi Port XS
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Installation and operation manual
