5
Equipment functioning
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Betriebsanleitung_commotherm_5_15_SW_WW_Touch_Englisch_V1.2
5.1
Refrigerant
Generally, what is understood by a refrigerant is a working material for heat pumps or cooling machines. The
refrigerant circulates in a closed system and is also subject to various changes in condition (see figure 5.1).
The HERZ heat pump works with the refrigerant, R407C, which consists of the following components:
1,1,1,2-tetrafluoroethan (R134a)
50% - pentafluoroethane (R125)
50% - difluoromethane (R32)
5.1.1
Characteristics of the refrigerant
According to ÖNORM EN378-1 refrigerants are divided up into groups with regard to health and safety:
Classification according to flammability
Classification according to toxicity
Group 1: No flame propagation
Group A: Lower toxicity
Group 2: Lower flammability
Group B: Higher toxicity
Group 3: Greater flammability
Table 5.1 shows the position of the refrigerant, R410A, used in safety group A1.
Table 5.1: safety group for the coolant, R410A, used
Safety group
Greater flammability
A3
B3
Lower flammability
A2
B2
No flame propagation
A1
B1
Lower toxicity
Higher toxicity
Other characteristics are:
Ozone reduction potential: 0
Boiling temperature: - 48,5 °C
Temperature operating range: -25°C to 32°C
5.1.2
Measures when refrigerant escapes
If refrigerant escapes, fast evaporation of the fluid may cause frostbite. Steam is also heavier than air, which
may lead to suffocation due to displacement of oxygen in the air. If an escape of refrigerant is noticed (it is
heard to escape, icing over of the exit point), the following measures should be taken:
Ensure there is adequate ventilation.
Close and seal the door to the room where the equipment is located.
Notify HERZ service or customer service.
People must leave the room where the equipment is located straight away.
Consult the doctor or veterinarian if people or animals were exposed to an increased dose for a long
period.
Switch off the power immediately.
In the event of fire, any type of fire extinguisher may be used.
There is no risk of the R410A refrigerant escaping if the HERZ heat pump is
used correctly. If there is an escape of refrigerant due to improper use, there
is a risk of suffocation (air displacement) and frostbite (exit points may
become extremely cold). In chapter 5.1.3 First Aid measures are also
described for contact with coolants.
