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| Instructions for unloading on the site as well as installation and connection
To protect against frost a temperature sensor for the
transmission of an analog signal to the controller is placed
in a pipe on the collection pipe for return water. The sen-
sor must be fitted water tight with a cap in the pipe be-
fore water under pressure is in the coil. The pipe for the
sensor is soldered on the collection pipe and it is impor-
tant to hold contra on the pipe, when the cap is
tightened.
Coil seen from above.
The sensor measures the water
temperature of the water inside one of the small pipes
for return water in the coil. The sensor reduces the area in
this pipe and hereby also the flow of warm water in this
pipe. The temperature in this pipe is reduced more than
the temperature in all other pipes by the airflow through
the battery. Because the lowest temperature in the bat-
tery probably is measured here, this system creates early
and safe warning of frost.
It is important that the cap is tightened sufficient to keep
the sensor system fully water tight.
I.4.4.3.2 Pipe connection to cooling coils for chilled water
Coils with 3 rows or more must always be connected in counter flow to the airflow.
Caution
The glycol must be without additives and auto glycol must not be used.
Automatic bleeding has to be installed at the highest point of the 2 pipes — supply or return pipe
I.4.4.3.3 Valve motor and valve for heating
The valve and valve motor are not installed. 2-way or 3-way valve is available.
I.4.4.3.4 Valve motor and valve for cooling
The valve and valve motor are not installed. 2-way or 3-way valve is available
I.4.5
Draining condensate water
Drip trays for collection of condensate water are installed under plate heat exchanger, run-around coil and cooling coil.
Each drip tray is provided with a drainage outlet. A water trap is always necessary. To avoid freeze ups and frost bursts
of water trap and pipes, sufficient insulation is recommended and installation of heating between the insulation and
water trap/pipes could even be necessary (insulation, heating and controller for the heating are not delivered by
Systemair).
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