Energie ECO-NOMIC, Техническое руководство

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ECO-NOMIC TECHNICAL MANUAL
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3.3.5. Refrigerant
The R134a is a HFC fluid, thus not harmful to the ozone layer. It has great chemical and thermal
stability, low toxicity, non-inflammable and is compatible with most materials.
The following graphic depicts the behaviour of pressure according to evaporation temperature:
T (
O
C) P (bar) T (
O
C) P (bar)
-20 0,33 20 4,70
-15 0,64 25 5,63
-10 1,00 30 6,70
-5 1,43 35 7,83
0 1,92 40 9,10
5 2,49 45 10,54
10 3,13 50 12,11
15 3,90 55 13,83
3.4. Safety and Control Devices
3.4.1. Safety Thermostat
The safety thermostat is set by the supplier to ensure that the water temperature in the storage
water heater does not exceed the standard value. Should the temperature exceed this value, the
thermostat switches off the support resistance. Switching on is done manually by qualified staff, after
analysing the reasons for the switch off.
3.4.2. Protection against corrosion
The hot water cylinder in this equipment is made of stainless steel AISI444.
Besides being resistant to corrosion, the storage water heater has in addition a magnesium anode
that should be checked periodically according to information by the installer.
3.4.3. Expansion Vessel (not supplied)
The expansion vessel is a device whose purpose is to compensate for the increase in water volume
due to temperature rise and to reduce the consequence of any water hammer effect.
Installing this device is a recommended procedure for a correct installation of the
equipment.
Installing this device is the responsibility of the installer.
As a general rule it is installed in the cold water pipe.
3.4.4. Safety Group
The safety device allows the system to be protected against anomaly situations: cold water supply,
hot water flowing back, emptying the storage water heater and high pressure. The valve is calibrated
to activate at 0.7 MPa.
In order to drain the water in the storage water heater, you should close the supply valve and open
the discharge valve.
The safety valve discharge pipe must be open into the atmosphere, driven to the sink because the
valve may drip or even discharge water.