Maintenance
LQQA Humidifier, for circulated water
18
3
1
17
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. LQAZ-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
2
9
4
16
Size 60-84
15
14
7
8
10
6
5
11
Fig. 1
12
13
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
Level monitors
A
B C
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: Level monitor A: Closes the water
supply valve when the water reaches max. level A.
Setting A: 65 mm from the upper edge of the water tray (sizes 60–84).
N
ZO
3
2
1
Zone Scale
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 (Fig. 2) is to be preset.
Level monitor C: Setting C: Level monitor B: Adjustable
Adjusting screw
Zon
3
Stops the circulation pump and opens
the water supply valve if the water
level drops below level C.
25 mm from the bottom of the water
tray (sizes 60–84)
Fig. 2
2
1
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
9206 GB 2011.11
1
Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
Maintenance adjustments (Contd.)
Table 3. Supply water flow
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 rotation 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 drop ped 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 according
to Table 2, 3 and Fig. 6.
Size Supply water flow, l/min
Aluminium
90%
60%
60
62
64
30
40
50
15
20
25
71
73
40
50
20
25
80
82
84
40
50
60
20
25
30
Droplet eliminator
The droplet eliminator fills must be correctly fitted for
the direction of air flow, see the arrow on the droplet
eliminator.
EUQA 2;1
EUQA Pump
0
2
0
4
6 4
30
20
10
Fig. 3
Fläkt Woods
Fig. 4
9206 GB 2011.11
2
2
Adjusting screw
Reading point
Fig. 5
Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
Table 2. Presetting the time relay
Table 3. Presetting time relay TR1
Seconds
0
Time required for emptying
Size
Normal operation preset
value
High humidification over a
long period
Δx >8 gram Δx >5 gram
90%
60%
90%
60%
60
62
64
30
60
60
0
0
30
30
90
240
0
0
120
71
73
60
90
30
60
180
240
90
120
80
82
84
90
90
120
60
60
60
180
240
300
120
120
120
Time relay TR1 has been preset for
normal operation. If the time required for emptying has to be increased
due to humidification over a long
period, this can be done as follows:
1. Select Function 12
2. Select the Range
3. Select Time
– If Range has red digits, Time shows tenths of Range
– If Range has black digits, Time .
shows thirtieths of Range
Example: Size 64, Δx>8 gram.
Set a time of 240 sec.
– Select a Range of 300 sec.
(black digits)
– Select a Time of 24
(black digits)
A1~+
15
B1
Range
1s
Time
0
10
10 s
10 red
20
30 s
20 black
30
30 s
30 black
40
100 s
4 red
50
100 s
5 red
60
100 s
6 red
70
100 s
7 red
80
100 s
8 red
90
100 s
9 red
100
100 s
10 red
120
300 s
12 black
180
300 s
18 black
240
300 s
24 black
300
300 s
30 black
TR1
M
1s
Range
1.5 .5
Time
12
Function
TR1
Q1
ETR4–69–A
Rel
16
NR1 NR2 NR3
Power
18
A2~-
K1
Fig. 6
R1
Fig. 7
Fläkt Woods
9206 GB 2011.11
3
Components inside the control box
Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
Water quality
To set the timer for emptying and flushing
Evaporation causes an increase in the concentration of
minerals in the circulating water, which necessitates
continuous bleed-off and make-up with fresh water.
The bleed-off rate is dependent on factors such as:
For normal function, the timer should be preset to
”ON”. When emptying, which can be programmed to
occur once or several (optional) times every 24-hour
period, the timer will reset itself to the ”OFF” setting
for 10 minutes. After that, the timer will reset itself to
”ON” for 2 minutes to allow flushing.
The timer will then reset itself to the ”OFF” setting
for 3 minutes for additional emptying before resetting
itself back to ”ON” for normal operation.
In the following example, emptying and flushing
are required once every 24 hours from 12.00 to 12.15 as
scheduled below.
■ the pH of the water
■ the bicarbonate concentration (HCO3 ), mg/l
■ the calcium concentration (Ca2+), mg/l
This data can be obtained from a municipal water authority or by analysing the water.
Lime precipitation can be prevented by plotting the pertinent data in Chart 1 on page 4 to determine the current
risk zone. Water level monitor B can then be set according
to the relevant zone. If the water is too hard, it may be
necessary to subject it to partial softening.
In addition to the risk of lime precipitation, the concentration of chlorine (Cl) and copper (Cu) must be taken into
account. To ensure acceptable performance, the concentration of Cl in the fresh water must not exceed 50 mg/l
and that of Cu must not exceed 0.02 mg/l.
Fläkt Woods
9206 GB 2011.11
Period 00.00–12.00 12.00–12.10 12.10–12.12 12.12–12.15 12.15–24.00 Timer setting Activity
ON OFF ON OFF ON Normal operation
Emptying
Flushing
Additional emptying
Normal operation
This can be done most easily by programming the operation times from 12.15 to 12.00 and from 12.10 to 12.12
on a daily basis! Emptying and additional emptying
will then occur from
4
Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
The timer has also been preset for the following:
– Summer and winter time in the country where it is to
be used.
– Date and time in the time zone where it is to be used.
Timer
The timer has been preset at the factory for emptying and
flushing as described above once every 24-hour period.
Day-by-day summary of the
programmed connection times.
Example: 5 = Friday
L
24
Duct status
ON = On, OFF = OFF
Maintenance voltage OK:
Indicated by 2 flashing points
between the numbers on the
display.
Running reserve mode:
Indicated by 3 flashing points
between the numbers on the
display.
Choice of function:
Ex: Auto, Prog, Pulse,
Cycle, Delete
Auto
0
Manual operation
Permanent ON/OFF
Symbols which indicate summer/winter function:
Summer
Winter
❄
1234567
MENU
Display of special functions:
-
+
OK
The numbers under the display indicate days of
the week
1 = Monday, 2 = Tuesday, etc.
Choice Yes means choice of programming.
1
2
3
N
Choice No means continue.
N
L2
Change of current time of day
1. Press menu 2 times flashes
2. Press OK
Display shows YEAR, change with + or –
3. Press OK
Display shows MONTH, change with + or –
4. Press OK
and continue for DAY, HOUR, MINUTE, SU/WI…
(SU = Summer, WI = Winter)
Change of ON/OFF
1. Press menu 1 time - Prog flashes
2. Press OK
Read text in the display!
Select with + or –
Store with OK
Manual operation of ON/OFF
1. Press both + and – at the same time.
~1 sec gives manual ON/OFF, (returns automatically)
~2 sec gives permanent ON/OFF
For switching ON/OFF
1. Press menu 1 time - Prog flashes
2. Press OK
3. Change to QUESTION with + or –
4. Press OK
5. Press OK for next time.
To INTERRUPT
And continue to END
Press menu
6. Press OK
Fläkt Woods
9206 GB 2011.11
L1
Resetting:
Briefly press both + and – at the same time.
For further particulars, see the separate instructions
supplied with the timer.
5
Specifications are subject to alteration without notice
EU Air Handling Unit
INSTALLATION
Maintenance
EUQA Humidifier, for circulated water
LQQA Humidifier, for circulated
water
Determining the water quality zone
Example
The following particulars are required to be able to determine the water quality zone.
Chart
1 the water
■ the
pH of
– mg/l
■ the
bicarbonate
Zone
1 is the safeconcentration
zone, in which(HCO
the water
soft or
3 ), is
2+
■ the
calcium concentration (Ca ), mg/l
demineralized.
Data from the municipal water authority:
pH = 7,6
Example
Bikarbonate
70 mg/l
Calcium
30 mg/lwater authority:
Data
from the municipal
pH = 7,6
From Chart 1, the
point is in zone 1 (safe
Bikarbonate
70operating
mg/l
zone). Calcium
30 mg/l
Zone 2 is the lower part of the transition zone, in which
This
cancan
be be
obtained
from
a municipal
water
authothedata
water
said to be
of normal
drinking
quality.
is the upper
part
of the transition zone, in which
rityZone
or by3 analysing
the
water
the water is relatively hard.
Zone 4 is the precipitation zone, in which the water is
very hard. The water must be subjected to partial softening, so that its quality will be within zone 2–3.
However, the softening treatment must not lower the
quality of the water to zone 1.
From Chart 1, the operating point is in zone 1 (safe zone).
2+
mg/l
Calcium Ca2+
m
g/l
2
pH-value
pH-value
4 6 10 20 40 60 100
1000
10 000
5
6
Max.
Max. pH
pH of
of aluminium
aluminium
7
8
8,5
9
9,5
10 000
6000
4000
2000
1000
600
400
200
n
tio
ita
ip
ec
Pr
100
60
40
zo
ne
20
10
6
4
3
2
n
io
sit
an
Tr
4
ne
zo
f
Sa
1
Bikarbonate
BikarbonateHCO
HCO3–3– mg/l
mg/l
e
on
ez
2
1
Water consumption
The water consumption consists of the water evaporated and a certain amount of water bleed-off. This bleedZone
is the
safe zone,toinreduce
whichthe
theconsumption
water is softoforsalts
off 1flow
is necessary
demineralized.
in the circulating water. If the concentration of salts is
Zone
is thesalts
lower
part
the transition
in which
too2high,
may
be of
deposited
on the zone,
humidifier
fill,
thewhich
water will
can have
be said
to be of normal
quality.
a detrimental
effect drinking
on the performanZone
3 isthethe
upper part of the transition zone, in which
ce of
humidifier.
theThe
water
is relatively
hard.
chart
above can
be used to determine the appropriate bleed-off flow.
If the humidifier has been sized for running over a long
period at a high humidification rate
Δx above 8 grams per kg of air (90% humidifier) and
Δx above 5 grams per kg of air (60% humidifier) respecFläkt Woods
Fläkt Woods
3214 GB 05.08
9206 GB 2011.11
tively is recommended if the water tray is emptied and
flushed twice a day. (See: To set the timer for emptying
Zone
4 is the precipitation zone, in which the water is
and
flushing.)
very hard. The water must be subjected to partial softening, so that
will be within zone 2–3.
Periods
outitsofquality
service
However,
the
softening
treatment
must
notemptying
lower the
The controller of the humidifier switches
to the
quality
of the water
1. out.
mode
whenever
the fantoiszone
switched
Clean the water tray if the system is to be shut down
for an extended period, such as during the annual holiday
and long weekends.
If the humidifier is to be out of service for some time,
the humidifier fills should be removed, cleaned and stored in a place where they will not sustain damage.
6
6
Specifications are subject to alteration without notice
Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
To shut down the humidifier
A. Isolate the power supply
B. Stop the fans, if they are operating.
Cleaning or replacement of the humidifier
fills and droplet eliminators
A. Shut down the humidifier.
B. Open the inspection door.
C. Withdraw the spacer plate as shown in Fig. 8.
D. Withdraw the droplet eliminators and humidifier
fills straight out of the humidifier. See Fig. 8.
Important!
The inner humidifier fills can be reached if you
carefully step on the edge of the water tray. Avoid
walking on the bottom of the water tray, guide
rails or electric cables.
E. The fills are relatively fragile and therefore should
be treated with great care. Clean by spraying with a
jet of clean water, possibly containing the ULCZ-01
cleaning agent. When replacing the humidifier
fills, see the appropriate instructions supplied
with the new fills.
F. Refit the components in the reverse order.
G. Check the position of the spacer plate and close
the door.
Fig. 8
To clean the water tray
A. Shut down the humidifier.
B. Withdraw the humidifier fills and the droplet
eliminators.
C. Open the drain valve manually to drain the water
tray.
Important!
Do not walk on the bottom of the water tray,
guide rails or electric cables.
D. The water tray is now exposed and can easily be
cleaned with the flushing hose supplied.
E. Refit the components in the reverse order.
F. Check the position of the spacer plate and close
the door.
Fläkt Woods
9206 GB 2011.11
7
Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
Service intervals
Component
Service work
Interval, months
Casing (water tray,
ends, top, guide rails)
Drain the water tray. Clean the interior by flushing, wiping or brushin
if necessary.
3
Humidifier fills
Droplet eliminator
Clean by flushing with water, possibly with ULCZ-01 cleaning agent,
particularly if the humidification performance has deteriorated.
3
Water filter
Clean or replace the filter cartridge, if necessary. (The mesh must not
exceed 500 μm.)
3
Level monitor
Check the water level and adjust as necessary.
3
Water flow
Clean the spray tubes as necessary.
3
Water trap
Clean and refill.
6
Water quality
See under “maintenance adjustments”.
12
Wiring diagram
L1
L2
L3
N
PE
1
3
5
HB 0
1
2
4
6
G/G
1
2
SU1
6A
1 2 3
4
Q1
1
5
3
4
7
M
C
1 3 5
Q2
4
–
TF
2
no
Interlock
GM
3
4
c
no
Humidity control
A1
A2
19
8
6
5
18
1 3 5
Level relay
Prevents operation
when the tray is dry
A1
11
14
12
A1
2 4 6
1 3 5
K1
2 4 6
A1
1 3 5
B1
B2
B3
A
16
2 4 6
U V W
M
3
M
3
CP1
CP2
15
Level relay
Maintains correct level
R1
21
16
18
15
B
B1
17
11
A1
B3
9206 GB 2011.11
Aux. relay Time relay Level monitor 8
Solenoid valve
Maintains
correct level
B1
B2
R1 TR1 NR1, NR2 12
TR1
16
18
TR1
15
R1
18
16
34
32
13
31
NR3 Level monitor HB Main switch SV1 Valve actuator Delayed
closure, SV1
A2
SV1
3
1
14
Q1, Q2 Motor protection switch F1 Automatic fuse SU1 Timer MV1
24
22
NR3
A2
A1
Fläkt Woods
Contactor
CP2
A2
Level relay
Bleed-off
U V W
A2
NR2
K2
2 4 6
Contactor
CP1
K2
A1
I> I> I>
A2
K1
R1
18
16
A2
A1
A2
Control box on inside
Auxiliary relay
Emptying/ Flushing
R1
B1
B2
B3
Control box on outside
Timer
Emptying/ Flushing
c
NR1
15
I> I> I>
N
SU1
F1
15
Valve actuator
2
K1, K2 Contactor
TF Supply air fan
GM Hygrostat
Specifications are subject to alteration without notice