EUQA Humidifier, for circulated water
Fläkt Woods
3176 GB 05.08
2
Specifications are subject to alteration without notice
EU Air Handling Unit
MAINTENANCE
Maintenance adjustments (Contd.)
The humidifier function:
– switch on the power supply to the humidifier. The
water tray will start to fill with water.
Check:
– that the pump has started and that it is pumping
water.
If there is no water flow, change the direction of rota-
tion of the pump, see Fig. 5.
– preset the required supply water flow rate according
to Table 1. This is done by setting the adjustment
screw on the flow controller, shown in Fig. 4.
– that water is being discharged from all of the holes
in the spray pipe(s). If any holes are clogged, use a
needle to unclog them. If the spray pipe(s) is/are
extremely clogged, remove the end plugs (17), brush
inside them using a round brush and then flush
them clean.
– that the flow of supply water stops when the water
level in the tray reaches level monitor A.
– that water bleed-off can be done by manually opening
the drain valve approx. half way (45°), see Fig. 3. The
valve can be reclosed by pressing a reset button on the
control unit. When the water level has dropped below
the lowest point of sensor B, the drain valve should
open fully. If the water level continues to drop below
the lowest point of sensor C, water inlet valve should
begin to open and after a preset period (see Table 2,
Fig. 6) the drain valve should start to close. When the
water reaches level C, the pump should soon stop.
(The pump should not run when the water level is
below level C.)
– The preset period on the time relay should be accor-
ding to Table 2, 3 and Fig. 6.
Droplet eliminator
The droplet eliminator fills must be correctly fitted for
the direction of air flow, see the arrow on the droplet
eliminator.
45°
45°
0
0
2
4
2
4
6
30
20
10
Fig. 3
Fig. 5
Table 1. Supply air flow
Water flow (l/min)
Adjusting screw
Fig. 4
Reset button
Size Supply water flow, l/min
Aluminium
90%
60%
20
10.0
5.0
21
15.0
7.5
22
20.0
10.0
30
15.0
7.5
31
20.0
10.0
32
25.0
12.5
33
30.0
15.0
40
20.0
10.0
41
25.0
12.5
42
30.0
15.0
44
40.0
20.0
50
25.0
12.5
51
30.0
15.0
52
35.0
17.5
53
40.0
20.0
60
30
15
62
40
20
64
50
25
71
40
20
73
50
25
80
40
20
82
50
25
84
60
30
