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Operation and Maintenance
Envistar Flex
DSEF191101.05.EN
Continuous product development may give rise to specification changes without notice.
6.8 Air cooler water
(code ESET-VK, ESET-DX, MIE-CL/ELBC, MIE-CL/ELBD)
Air cooler (code ESET-VK, ESET-DX) Air cooler (code MIE-CL/ELBC, MIE-CL/ELBD)
The cooling coil consists of a number of copper tubes with aluminium fins
pressed 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
condensation water, and in some cases there is a droplet eliminator downstream
of the cooling coil which prevents drops of water accompanying the air stream.
Inspection
DANGER!
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
operation)
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.
