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| Instructions for unloading on the site as well as installation and connection
water to the pipe marked for outlet is very important to ensure that the sensor for transmission of the water tempera-
ture really will be placed in a return circuit of the coil (Screw-joint for the water temperature sensor is welded in the
main collection pipe for return water).
For the frost protection of heating coil, the water temperature in the coil is transmitted to the controller The controller
always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against frost.
This frost protection is also activated when the running mode is “off”.
Coils with 3 rows or more must always be connected in counter flow to the airflow.
Note:
If glycol is added, 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.
If the heating battery is built with 3 or more rows, the water flow must be in counter flow to the direction of the air.
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 battery. The pipe for
the sensor is soldered on the collection pipe and it is im-
portant to hold contra on the pipe, when the cap is
tightened.
Battery seen from above. The sensor measures the
water temperature of the water inside one of the small
pipes for return water in the battery. 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 air-
flow through the battery. Because the lowest tempera-
ture in the battery 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
output |
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