Carel MCmultizone, User Manual

Page: 43 / 52

43
ENG
“MCmultizone” +030221981 - rel. 2.3 - 09.12.2014
cabinet
distribution
maint
enanc
e
There are fundamentally three components that require adjustments:
•
atomising heads;
•
air and water lines;
•
electronic controller.
Heads
The screw on the rear of the head is used to adjust the atomised water
fl ow-rate. This is calibrated in the factory to the reference values (2.1 bars
air, 0.35 bars water) for the design fl ow-rate, which may be 2.7; 4.0; 5.4; 6.8
or 10 l/h. If the spray is visibly diff erent in intensity from the other similar
heads, or the environmental conditions mean higher or lower absorption,
the screw can be adjusted to increase or decrease the water fl ow-rate.
This operation should only be performed by authorised personnel (CAREL
service centres).
Air and water line
The air and water pressure in the respective lines must have the following
values:
•
Cabinet air inlet: 5 to 7 bars
•
Cabinet air outlet: 2.1 bars
•
Cabinet water inlet: 3 to 7 bars
•
Water outlet:
•
0.35 bars if the heads and cabinet are at the same height;
•
(0.35+Hx0.1) bars if the heads and cabinet are at diff erent heights.
H is the height between the heads and the cabinet water line in
metres.
Note: maximum height between the cabinet and the water line
is 20 m.
The MC modulating humidifi cation system can modulate the production
of atomised water by adjusting the air pressure at the heads, allowing a
proportional variation in fl ow-rate.
•
The minimum pressure is set as default to 1.2 bars.
•
The maximum pressure is set as default to 2.1 bars
These values can be modifi ed so as to optimise:
•
the minimum pressure according to the type of atomising head used
•
the maximum pressure according to the pressure drop in the line (also
see chapters 5.3; 6.2).
in the case of modulating units with pressure transducer at the end of the
air line, the maximum pressure is controlled automatically (the transducer
is supplied by CAREL as an option).
15. MAIN ADJUSTMENTS