6.3.4 Electric air heater
Personnel:
Skilled qualified electrician
Protective equipment:
Protective clothing
Hearing protection
Industrial safety helmet
Protective gloves
Safety shoes
In air handling units with X-CUBE Control (controls),
both the temperature monitoring and the safety temper-
ature limiter operate independently of one another to
ensure that no inadmissible overheating occurs at the
electric air heater.
For air handling units with on-site controls, on-site
measures must be taken to prevent impermissible tem-
perature excesses. The manufacturer documentation
must be observed for this purpose, see attachment.
CAUTION!
Protection against overheating
The electric air heater must be installed so that the
heating elements cannot start up before the intended
air volume flow is reached. The electric air heater
must be put out of operation as soon as the volume
flow rate is reduced to a level that is not permitted or
the fan is switched off.
To prevent a temperature excess that is not per-
mitted, two temperature-limiting devices must be
installed in the air handling unit independently of
each other (temperature monitor and safety tempera-
ture limiter).
6.3.5 Run around coil system
The run around coil system must only be put into opera-
tion after the entire system has been professionally con-
nected and checked (both hydraulic and electrical sys-
tems). These checks have to be recorded, and the
results have to be available at the time of commis-
sioning.
Heat transfer fluids with glycol
WARNING!
Health risk from heat transfer fluids that contain
glycol!
The heat transfer fluids in the heating coil, cooling
coil and run around coil system contain glycol, which
can damage your health if it comes into contact with
your skin, if you swallow it or if you inhale the vapour
or mist.
–
Avoid contact with heat transfer fluids that con-
tain glycol.
–
Work must only be carried out by skilled qualified
refrigeration technicians, HVAC technicians or
the
.
–
Do not eat, drink or smoke while handling heat
transfer fluids that contain glycol.
–
Wash your hands when you interrupt or finish
your work.
–
If you have come into contact with a heat transfer
fluid that contains glycol, follow the first aid
instructions given on the safety data sheet for the
heat transfer fluid.
–
When you have to handle a heat transfer fluid
that contains glycol, wear the personal protective
equipment specified in the safety data sheet for
the heat transfer fluid.
Commissioning the run around coil system
Personnel:
HVAC technician
Protective equipment:
Industrial safety helmet
Protective clothing
Protective gloves
Safety shoes
Ensure that the maximum pressure values given in
the technical data are not exceeded.
Use appropriate measures to protect the water
system from frost. Frost protection can be achieved
with a water glycol mixture or with a special anti-frost
thermostat.
Initial commissioning
Setting up and adjusting AHU casing units > Run around coil system
Air handling unit X-CUBE X2 / X-CUBE X2 compact
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