3.
Fit filters into the installation subframe and fix
them with the clamping elements. Make sure that
they are tightly seated.
ð
The filter has been set up.
6.3.4
Heating coil/cooling coil
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
.
–
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 heating coil/cooling coil
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.
1.
Ensure that the flow and return connections are
correct.
2.
Check that fittings are correctly installed.
3.
Flush the system to remove any contamination.
4.
Open vents (unless automatic vents have been
installed).
Evaporators: As soon as you open the heat
exchanger connection, the contained nitrogen
shield gas content should escape with a
hissing sound. The absence of this sound indi-
cates a leak which has to be fixed before com-
missioning.
5.
For glycol water mixtures we recommend
ready-to-use formulations. See the order-spe-
cific air handling unit data sheet from TROX for
the mixing ratio.
The correct mixing ratio is important:
–
Too much glycol will impair performance
–
Too little glycol may lead to frost damage
can result.
Only use one of the following glycols for the air
handling unit:
–
Propylene glycol
–
Ethylene glycol
Slowly pour the heat transfer fluid into the heat
exchanger at the lowest point in the system. As
you fill the system, check that all external and
internal screw joints and connections are tight.
6.
Vent the heating coil/cooling by opening the upper
spigot and the bleed screw.
If the heating coil/cooling coil is not properly
vented, air bubbles may form and impair the
performance.
7.
Close any vents.
Initial commissioning
Setting up and adjusting AHU casing units > Heating coil/cooling coil
Air handling unit X-CUBE
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