User Manual

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Siemens Frost detectors A6V10432020_en--_c
2019-04-29
Notes
The frost detector operates on AC 24 V. The transformer used must be suitable for
safety extra low voltage (SELV), 100% duty, and must have separate windings.
Fuses, switches, wiring and earthing must be in compliance with local safety regu-
lations. The permissible cable lengths must be observed.
If the capillary tube is mechanically damaged or if there is a leak in the diaphragm
system, the frost detector signals a temperature of 0 °C. That is the case also if
there is a power failure or if one of the major electronic components fails.
On the hot side of the air heating coil.
Direct mounting
Fit the housing (by using the 2 fixing holes) to the wall of the air heating coil. Intro-
duce the capillary tube in the air duct and protect it by using the rubber grommet
supplied with the frost detector (refer to "Accessories").
When fitting the frost detector inside the air duct: secure the housing to the inner
wall of the air heating coil and lead the capillary tube through one of the lateral
grooves.
Direct mounting, with test loop for functional test
Fit the housing (by using the 2 fixing holes) to the wall of the air heating coil and
lead the capillary tube through one of the lateral grooves.
Bend the capillary to form a test loop, introduce the capillary to the air duct and
protect it by using the enclosed rubber grommet (refer to "Accessories").
This mounting method is not recommended when the ambient temperature at the
external test loop may fall below the temperature at the measuring location in the
air duct (the measuring signal of the sensing element always represents the lowest
temperature, no matter where it occurs along the capillary tube!).
With mounting flange (refer to "Accessories")
This mounting method is suited for air ducts having an insulation of up to 70 mm.
Fit the mounting flange to the wall of the air heating coil and introduce the capillary
tube through the flange in the air duct.
Coil the capillary tube evenly across the entire cross-sectional area of the air heat-
ing coil and attach it to the coil with the help of the clamps, maintaining a spacing
of 40 mm (refer to "Accessories").
The capillary tube must not be sharply bent. The bending radius should be as great
as possible.
The connection terminals are protected against wiring errors with own voltages up
to AC 24 V.
There are no settings required on the frost detector.
Using a test loop, the correct functioning of the frost detector can be checked with
the help of a mixture of ice and water.
The device is considered an electronic device for disposal in accordance with the
European Guidelines and may not be disposed of as domestic garbage.
 Dispose of the device through channels provided for this purpose.
 Comply with all local and currently applicable laws and regulations.
Engineering
Mounting
Mounting location
Mounting of housing
Fitting the capillary tube
CAUTION
Installation
Commissioning
Disposal