flakt woods EUQA, Maintenance Manual

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Fläkt Woods 3176 GB 05.08 1
Specifications are subject to alteration without notice
EU Air Handling Unit MAINTENANCE
EUQA Humidifier, for circulated water
1. Control box, on the outside
2. Control box, on the inside
3. Shut-off valve (not included)
4. Water filter, max. 500 mm mesh (not
included)
5. EUAZ-08 Water trap (accessory)
6. Water supply pipe
7. Humidifier fill
8. Droplet eliminator
9. Spray pipe
10. Pump
11. Flow controller
12. Valve with motor actuator
13. Overflow hose
14. Water level sensor
15. Solenoid valve
16. Flushing hose
17. End plug
18. Side wall
17
18
3
2
4
16
15
14
1
9
7
8
10
11
12
13
5
6
5
6
Maintenance adjustments
Water:
Determine the calcium and bicarbonate content and the
pH value of the water. These values can be obtained
from a water analysis or from the local water authority.
Plot the values of bicarbonate, calcium and pH in chart
1 on page 5 to determine in which zone the water can
be classified. If the water is of zone 4 type, it should be
softened.
Level monitors fig. 2
Level monitor A: Closes the water supply valve when
the water reaches max. level A.
Setting A: 25 mm from the upper edge of the
water tray (sizes 20–53), 65 mm from
the upper edge of the water tray (sizes
60–84).
Level monitor B: Opens the drain valve for water bleed-
off.
Setting B: The zone value obtained (see page 5)
determines at which setting level
monitor B is to be preset. Set the mar-
king on the monitor in relation to the
zone scale.
Level monitor C: Stops the circulation pump and opens
the water supply valve if the water
level drops below level C.
Setting C: 20 mm from the bottom of the water
tray (sizes 20–32); 25 mm from the
bottom of the water tray (sizes 40–84)
Level relays:
NR 1, NR 2 and NR 3 are shown in Fig. 7. The level
relays are preset at a sensibility of 40 k
Ω
. If softened
water is used and the level monitors don't work, the
sensibility setting can be increased to 100 k
Ω
.
1
2
3
ZO
N
A
B C
Zone Scale
Level monitor B: Adjustable
Adjusting screw
Level monitors
Zon
3
2
1
Fig. 1
Fig. 2
Sizes 20–42, 50, 51
Sizes 44, 52, 53–84