EDM SYSHP MINI DCI
67
Keep dry
Do not fasten the black plastic
cover on the vent valve at the
topside of the unit when the
system is running. Open air
purge valve, turn anticlockWise
at least 2 full turns to releaseair
from the system.
That in case of an installaon with a domesc hot water tank, only the use of propylene glycol is allowed. In other
installaons the use of ethylene glycol is ne.
That no automove glycol is used because their corrosion inhibitors have a limited lifeme and contain silicates that can
foul or plug the system;
That galvanized piping is not used in glycol systems since it may lead to the precipitaon of certain elements in the glycol’s
corrosion inhibitor;
To ensure that the glycol is compable with the materials used in the system.
3.5 Water Flow Switch
Water may enter into the ow switch and cannot be drained out and may
freeze when the temperature is low enough. The ow switch should be
removed and dried, then can be reinstalled in the unit.
Counterclockwise rotaon, remove the water ow switch.
Drying the water ow switch completely.
3.6 Adding Water
Connect the water supply to the ll valve and open the valve.
Make sure the automac air purge valve is open (at least 2 turns).
Refer to Figure 3-3.3.
Fill with water unl the manometer indicates a pressure of approximately
2.0 bars. Remove air in the circuit as much as possible using the air purge
valve. Air in the water circuit could lead to malfuncon of the backup
electric heater.
Figure 3-3.2: Water ow switch
Figure 3-3.3: Air purge valve
3.7 Water Piping Insulaon
The complete water circuit including all piping, water piping must be insulated to prevent condensaon during cooling
operaon and reducon of the heang and cooling capacity as well as prevenon of freezing of the outside water piping
during winter. The insulaon material should at least of B1 re resistance rang and complies with all applicable legislaon.
The thickness of the sealing materials must be at least 13mm with thermal conducvity 0.039W/mK in order to prevent
freezing on the outside water piping. If the outdoor ambient temperature is higher than 30°C and the humidity is higher than
RH 80%, the thickness of the sealing materials should be at least 20mm in order to avoid condensaon on the surface of the
seal.