Installation Heat Calculator; Connection Sensors - Zenner WR3 Notice D'installation Et D'utilisation

Installation heat calculator

The calculator is preferably to be
mounted on the wall. Do not mount
the device at the pipe or attach it
directly on the flow sensor. The
mounting adapter at the backside
of the calculator can be used for rail
mounting or for wall mounting. For
wall mounting detach the adapter
and turn it 180°, attach with at least
two screws to the wall and clip the
calculator on it. For rail mounting
lift the adapter a little bit, place the
calculator on the rail and push the
adapter back until it locks.
Rail mounting
Wall mounting

Connection sensors

The mounting of the temperature
sensors should be done symmet-
rical with direct immersion. If
immersion sleeves are used they
have to be checked for conformity
to MID and have to be marked
accordingly. The installation of
immersion sleeves has to be done
according to DIN EN 1434-2.
Sensors are colour-coded
■
(red = installation in the supply
pipe resp. pipe with higher tem-
perature, blue = installation in
the return pipe resp. pipe with
lower temperature).
The connecting cables may
■
not be buckled, extended or
shortened!
Do only use paired sensors with
■
the same serial number on it.
At 2-wire systems the cable
■
length of the temperature sen-
sor for supply and return should
not exceed 12.5 m for PT500. At
4-wire systems the maximum
cable length is 20 m. Consider
EN 1434-2 regarding the diame-
ter of the wires.
Supply and return sensors must
■
be inserted into the immersion
sleeves completely.
Secure the sensor after instal-
■
lation against unauthorised re-
moval with appropriate sealing.
Do not wrap or install wires
■
along hot pipes.
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