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5
Hydraulic connection
III
Fig. 43: Hydraulic circuit diagram
I:
Source/heating room
II: 1. Residential unit
III: Further residential units (congruent)
A: Ventilation unit module
B: Heat pump module
C: Drinking water storage module
1: Overflow air vents
2: Kitchen / Bathroom
3: Bedrooms and living rooms
4: Floor heating
5: Hot water
n
Protect underfloor heating systems mechanically against excessively high inlet temperatures.
n
The pipe cross-section of the inlet and return connection of the heat pump must not be reduced up to the
floor distributor
n
Plan for air bleed valves and drain-off taps at appropriate places
n
Flush the system's entire pipe network before connecting the heat pump.
n
Due to a hydraulic bypass line, it is possible to work with an external expansion vessel.
n
One or, where necessary, several expansion vessels must be designed for the entire hydraulic system.
n
The system pressure of the entire pipe network is to be matched to the hydraulic system and must be
checked when the heat pump is turned off. Also update the static-pressure form supplied with the heat
pump.
n
A dirt trap must be fitted outside the heat pump in the return flow. Ensure that the dirt trap remains acces-
sible for inspection and that it can be locked.
n
The dirt trap must be checked during every maintenance of the system.
n
Additionally, an automatic bleeder is installed in the unit for additional bleeding of the heat pump.
n
All exposed metallic surfaces must be additionally insulated.
All outgoing heating cycles are to be secured against the ingress of circulating water by means of check
n
valves.
n
Before being placed in service, the system must be thoroughly flushed.
n
To prevent structure-borne transmission, we advise you to install additional compensators in the inlet line
and return flow.
b
e
f
I
2
3
1
a
c
d
A
g
B
h
i
C
j
6: Cold water
a: Outside air
b: Outgoing air
c: Exhaust air
d: Supply air
e: Source inlet
f:
Source return flow
g: Heating cycle return flow
h: Heating cycle inlet
i:
Hot water off
j:
Cold water on
4
5
6
II
33
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