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Operation and Maintenance
Envistar Top 04-21
DSET.220501.07.en
Continuous product development may give rise to specification changes without notice.
6.8 Air cooler water (code ETKB-VK)
00028
The cooling coil consists of a number of copper tubes with aluminium fins press-
sed onto them. The coil will have impaired capacity if dust forms a coating on
the coil surfaces.
Not only does this impair the heat transfer capacity of the coil, it also increases
the pressure drop on the air side.
Even if the ventilation system is fitted with high quality filters, as time passes
dust deposits will form on the front edges of the coil fins (at the inlet side). A drip
tray with drain is located under the cooling coil for collecting and removing eva-
poration water.
Inspection
WARNING!
Risk of serious personal injury and/or damage to air handling
unit.
Read and understand the entire chapter "1.5 General safety
messages" before working on, servicing, or inspecting the air
handling unit.
Check:
1. The coil fins to detect possible mechanical deformity
2. That the water coil is not leaking
3. That cooling energy is uniformly distributed across the coil surfaces (in ope-
ration)
4. The drip tray and drain with water trap (clean if necessary)
5. That the water trap (without non-return valve) is filled with water.
