instruction and operation manual ZHK NANO
V04-18
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Figure 83:
Repair switch
-
Control box is equipped with repair switch in execution RED-YELLOW as specified above
-
On responsibility of the client must be ensured that of the above specified
Requirements ac-
cording to DIN VDE 0660 and IEC 947-3 on a repair switch in RED-YELLOW execution
are fulfilled
a) items 7 to 9
b) item 10, implementation
of emergency stop function in control system
7.4 Electric
heaters
An electric heater is designed to heat the airflow, which is stated on the technical data sheet, from
the specified air inlet temperature to the air outlet temperature. EUROCLIMA provides electric
heaters with one or more stages according to customer requirements.
The control of the electric heater provided by the customer can be carried out in several ways:
-
On-Off at single-stage electric heater (this type of control decreases the lifetime of the electric
heater under circumstances significantly)
-
On-Off at multistage electric heater
-
Continuous (e.g. with suitable thyristor control)
Fire risk!
With electric heater in operation, the heating elements may arrive to a tempera-
ture of several hundred °C.
In case of malfunction
±
heater in operation without adequate airflow
±
inadmissi-
ble temperatures may occur. Plastic parts as for example filters, gaskets, droplet
eliminators etc. close to electric heater may become damaged or even catch fire.
Subsequent damages up to fire spread to the building are possible.
In order to avoid the above mentioned risks EUROCLIMA provides as a standard electric heaters
with 2 independent safety thermostats.
7.4.1 AHUs equipped from EUROCLIMA with control
Units, which are supplied from EUROCLIMA with control, are limiting the supply air temperature to
a default value of 35 °C.
The execution and function as specified below is included in the EUROCLIMA delivery.
Control-side limitation of the air temperature after the electric heater
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