EDM SYSHP MINI SPLIT 06 16

Table Of Contents
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Uninhibited glycol will turn acidic under the inuence of oxygen. This process is accelerated by presence of copper and at higher
temperatures. The acidic uninhibited glycol aacks metal surfaces and forms galvanic corrosion cells that cause severe damage to the
system. It is of extreme importance:
That the water treatment is correctly executed by a qualied water specialist.
That a glycol with corrosion inhibitors is selected to counteract acids formed by the oxidaon of glycols.
That in case of an installaon with a domesc hot water tank, only the use of propylene glycol is allowed. In other installaons the
use of ethylene glycol is ne.
That no automove glycol is used because their corrosion inhibitors have a limited lifeme 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 precipitaon of certain elements in the glycol’s corrosion
inhibitor;
To ensure that the glycol is compable with the materials used in the system.
4.5 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 rotaon, remove the water ow switch.
Drying the water ow switch completely.
4.6 Adding Water
Connect the water supply to the ll valve and open the valve.
Make sure the automac air purge valve is open (at least 2 turns).
Fill with water unl 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 malfuncon of the backup electric heater.
4.7 Water Piping Insulaon
The complete water circuit including all piping, water piping must be insulated to prevent condensaon during cooling operaon and
reducon of the heang and cooling capacity as well as prevenon of freezing of the outside water piping during winter. The insulaon
material should at least of B1 re resistance rang and complies with all applicable legislaon. The thickness of the sealing materials
must be at least 13mm with thermal conducvity 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 condensaon on the surface of the seal.
Figure 3-4.2: Water ow switch