Connections/ Electrical Connection; Automatics; Supply Air Temperature Sencor (B1); Temperature Sensor For Water Battery (B5) - Flexit S3 R Operating Instructions Manual

6
Connections of ducts and electrical
connection
• The ducts usually come from joists and are
connected to the nipples on the top of the unit.
• Ensure that the ducts are connected to the right
nipple. See the labelling on the unit (top/bottom
and behind door). The symbols are explained on
page 3 and the placing is shown on measurement
drawing in Chap. 1.
• Pull the duct insulation well up to the unit.
• To avoid condensation, it is very important for the
outdoor air duct to have insulation and a plastic
sleeve pulled right down to the unit. Seal the plas-
tic sleeve to the unit with tape.
The outdoor air duct is normally designed with 25
mm insulation.
• Lay the outdoor air duct with a slight incline to-
wards the outdoor air cap so that any water that
enters drains out again.
• With a short distance between the unit and the
exhaust point, sound insulation must be installed
to meet the requirements for the outdoor sound
level.
• Ducts must have good sound insulation, particu-
larly above the unit.
• All electrical connections must be made by quali-
fied personell only.
the unit must be equipped with a separate
earth-leakage circuit-breaker.
Power Cord
The unit is supplied with a 1.8 m cable and plug (which
also functions as the service switch). The cable emerg-
es on the top of the unit (front) on the left side of a right
model and the right side of a left model. This is con-
nected to a 230 V 50 Hz single-phase earthed power
point that is located in an easily accessible position
close by. For fuse types, see chapt. 14.
Water models
Connected to external box
COMMON

6.1 Automatics

The control package is supplied with the unit. The low-
voltage cable must be laid between the unit and the
switch unit. See separate automatics documentation.
the low-voltage cable must be laid at least
30 cm away from the 230 V cable. For flush in-
stallation, lay the cable in 20 mm conduit pipe.
6.2 Supply Air temperature Sencor (B1)
temperature sensor B1 must be placed after
the water battery.
This should be placed in the supply air duct (red on Flexit
Drawing/ Symbold Used page 3) approx. 1 m from the unit.
Roll out the marked wire coil on the unit located close to
the supply air intake. Drill a Ø 7 mm hole in the duct where
the sencor can be placed. Seal the hole with a sealant and
tape the wire on the outside of the duct to keep in place.
6.3 temperature sensor for water battery (B5)
In order to avoid that the water battery is destroyed by
frost a temperature sensor (B5) must be installed on the
return water pipe where the cold water leaves the battery.
6.4 external Components
Refer to separate electrical circut drawing enclosed
with the individual ventilation unit and Fig. 18 below.
Electrical models
Connected directely on the mainvboard
Fig. 18
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