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.
Optimum ventilation
For the best possible ventilation, we recommend
installing on-site ventilation equipment at the highest
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
.
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 air heater is not properly vented, air bub-
bles may form and impair the performance.
7.
Close any vents.
8.
Clean the condensate drip tray and drain.
9.
Set up the droplet eliminator.
10.
Fill the drain trap with water.
NOTICE!
Risk of damage to property!
–
When you tighten thread connections, be sure to
use a suitable tool (e.g. water pump pliers) to
counter the tightening force as otherwise you
may inadvertently damage the parts.
11.
Check the flange screw joints and tighten them if
necessary.
ð
The heating coil/cooling coil has been set up.
Initial commissioning
Setting up and adjusting AHU casing units > Heating coil/cooling coil
Air handling unit X-CUBE X2 / X-CUBE X2 compact
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