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flakt woods EUQA Maintenance Manual

For circulated water
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EU Air Handling Unit
EUQA Humidifier, for circulated water
4
16
Sizes 20–42, 50, 51
15
14
Sizes 44, 52, 53–84
6
5
5
Fig. 1
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 kΩ. If softened
water is used and the level monitors don't work, the
sensibility setting can be increased to 100 kΩ.
Fläkt Woods
3176 GB 05.08
17
18
2
1
3
6
11
12
13
9
7
8
10
Level monitors
A
B C
N
Z O
3
2
1
Fig. 2
1
MAINTENANCE
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
Zone Scale
Level monitor B: Adjustable
Adjusting screw
Zon
3
2
1
Specifications are subject to alteration without notice

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Summary of Contents for flakt woods EUQA

  • Page 1 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.
  • Page 2 EU Air Handling Unit MAINTENANCE EUQA Humidifier, for circulated water Table 1. Supply air flow Maintenance adjustments (Contd.) Size Supply water flow, l/min The humidifier function: Aluminium – switch on the power supply to the humidifier. The water tray will start to fill with water.
  • Page 3 EU Air Handling Unit MAINTENANCE EUQA Humidifier, for circulated water Table 2. Presetting the time relay Table 3. Presetting time relay TR1 Time required for emptying Seconds Range Time Normal operation High humidification Size preset value over a long period ∆x >8 gram ∆x >5 gram...

  • Page 4: Water Quality

    EU Air Handling Unit MAINTENANCE EUQA Humidifier, for circulated water Water quality To set the timer for emptying and flushing For normal function, the timer should be preset to Evaporation causes an increase in the concentration of "ON". When emptying, which can be programmed to...
  • Page 5 EU Air Handling Unit MAINTENANCE EUQA Humidifier, for circulated water Timer The timer has been preset at the factory for emptying and flushing as described above once every 24-hour period. The timer has also been preset for the following: – Summer and winter time in the country where it is to be used.

  • Page 6: Water Consumption

    EU Air Handling Unit MAINTENANCE EUQA Humidifier, for circulated water Chart 1 Max. pH of aluminium Calcium Ca mg/l pH-value 20 40 60 100 1000 10 000 10 000 6000 4000 2000 1000 Zone 1 is the safe zone, in which the water is soft or Water consumption demineralized.
  • Page 7 EU Air Handling Unit MAINTENANCE EUQA Humidifier, for circulated water To shut down the humidifier A. Switch off the power supply. B. Stop any fans that might be running. Cleaning or replacing the humidifier fills and droplet eliminator A. Switch off the humidifier.

  • Page 8: Service Intervals

    EU Air Handling Unit MAINTENANCE EUQA Humidifier, for circulated water Service intervals Component Service work Interval, months Casing (water tray, Drain the water tray. Clean the interior by flushing, wiping or brushing ends, top, guide rails) if necessary. Humidifier fills...