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7.5. Confi guration of sensors
Sensor lines are furnished as standard with a line
cross-section of 0.75 mm².
The sensor positions are shown in the respective
installation layout. A perfect function can only be
guaranteed by a correct position and optimal thermal
transition (heat-conductive paste).
If necessary, the sensors can be extended by using
suitable cabling. Ensure a clean corrosion-free con-
nection.
7.5.1. Sensor confi guration
The following sensors are included in the delivery
contents or already mounted and in any case neces-
sary (see piping scheme).
- Heat exchange sensor (B72)
factory-provided and already mounted
- Air inlet sensor (B37),
factory-provided and already mounted
- Heat pump fl ow sensor (B33)
factory provided and already mounted
- Heat pump return sensor (B34)
factory provided and already mounted
- HGL-fl ow sensor (B35) - only HGL model
factory provided and already mounted
- Space heating storage tank sensor (B38)
- Cooling buff er sensor (B40)
- Flow sensor heating circuit A (B51)
- Hygienic sensor bottom (B41)
- Hygienic sensor top (B48)
- Warm water station sensor (B42)
- Outer sensor (B32)
(all other sensors are optional depending on the
system confi guration)
The sensor lines must be laid separately
from the feed lines. (see EMC problems)
(C) IDM Energiesysteme GmbH
7.5.2. Flow temperature sensor
The fl ow temperature sensor for the heating circuits
used have to be installed as shown in the piping sh-
emes. They are mounted to the appropriate fl ow lines
and connected according to the electrical connection
diagram.
The fl ow sensors for the heating circuits C-G are con-
nected to the respective heat circuit extension mod-
ule. (see assembly instructions extension module)
7.6. Connecting the outputs
The assignment of the outputs on the central unit can
be found in the electrical wiring diagram of the heat
pump.
7.7. Grounding the system
If the protective conductor is connected properly that
means that the control panel and the housing of the
heat pump are grounded properly.
In the case of maintenance operations, ensure that
the potential equalization is restored properly once
the maintenance has been fi nished.
7.8. Maximum delimitation in underfl oor heating
In underfl oor heating circuits an additional application
thermostat has to be mounted and the appropriate
heating circuit feed has to be switched in series
above that.
If the heating circuit does not have its own heating
circuit pump (unregulated direct heating circuit), no
contact thermostat is required. The safety shutdown
of the charge pump operates in this case directly via
the heat pump.
Installation instruction AERO ILM
Electrical connection
59
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