flakt woods LQQA Maintenance Manual

Brand
flakt woods
Model
LQQA
Category
Water dispensers
Type
Maintenance Manual
Fläkt Woods 9206 GB 2011.11 1 Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
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 classied. If the water is of zone 4 type, it should
be softened.
Level monitors g. 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).
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: Stops the circulation pump and opens
the water supply valve if the water
level drops below level C.
Setting C: 25 mm from the bottom of the water
tray (sizes 60–84)
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.
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
17
18
3
2
4
16
15
14
1
9
7
8
10
11
12 13
5
6
Size 60-84
Fig. 1
1
2
3
ZON
ABC
Zon
3
2
1
Level monitors
Zone Scale
Level monitor B: Adjustable
Adjusting screw
Fig. 2
Fläkt Woods 9206 GB 2011.11 2 Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
Maintenance adjustments (Contd.)
The humidier function:
– switch on the power supply to the humidier.
The water tray will start to ll with water.
Check:
– that the pump has started and that it is pumping
water. If there is no water ow, change the direction
of rotation of the pump, see Fig. 5.
– preset the required supply water ow rate according
to Table 1. This is done by setting the adjustment
screw on the ow 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 ush
them clean.
– that the ow 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.
Droplet eliminator
The droplet eliminator lls must be correctly tted for
the direction of air ow, see the arrow on the droplet
eliminator.
EUQA 2;1
Fig. 3 Fig. 4
0 0
2
4
246
30
20
10
EUQA Pump
Adjusting screw
Reading point
Fig. 5
Table 3. Supply water flow
Size Supply water flow, l/min
Aluminium
90% 60%
60 30 15
62 40 20
64 50 25
71 40 20
73 50 25
80 40 20
82 50 25
84 60 30
Fläkt Woods 9206 GB 2011.11 3 Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
Time relay TR1 has been preset for
normal operation. If the time requi-
red for emptying has to be increased
due to humidication 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)
Table 2. Presetting the time relay Table 3. Presetting time relay TR1
Size
Time required for emptying
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
Range
Time
ETR4–69–A
Function
1s
1.5 .5
12
M
A1~+ 15 B1
A2~-1816
Rel Power
TR1
Fig. 6
Seconds
0
Range
1 s
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
Q1
K1
R1
NR3
NR2NR1
TR1
Components inside the control box
Fig. 7
Fläkt Woods 9206 GB 2011.11 4 Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
Water quality
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:
■ 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 autho-
rity or by analysing the water.
Lime precipitation can be prevented by plotting the per-
tinent 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 concentra-
tion of chlorine (Cl) and copper (Cu) must be taken into
account. To ensure acceptable performance, the concen-
tration of Cl in the fresh water must not exceed 50 mg/l
and that of Cu must not exceed 0.02 mg/l.
To set the timer for emptying and flushing
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 ushing.
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 ushing
are required once every 24 hours from 12.00 to 12.15 as
scheduled below.
Period Timer setting Activity
00.00–12.00 ON Normal operation
12.00–12.10 OFF Emptying
12.10–12.12 ON Flushing
12.12–12.15 OFF Additional emptying
12.15–24.00 ON Normal operation
This can be done most easily by programming the ope-
ration 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
Fläkt Woods 9206 GB 2011.11 5 Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
Timer
The timer has been preset at the factory for emptying and
ushing as described above once every 24-hour period.
The numbers under the display indicate days of
the week
1 = Monday, 2 = Tuesday, etc.
N
L1
L2
1 2 3 N
MENU OK
- +
1 2 3 4 5 6 7
0
L
Auto
24
Display of special functions:
Manual operation
Permanent ON/OFF
Symbols which indicate summer/winter function:
Summer
Winter
Choice Yes means choice of programming.
Choice No means continue.
Duct status
ON = On, OFF = OFF
❄
Day-by-day summary of the
programmed connection times.
Example: 5 = Friday
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
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.
Change of current time of day
1. Press menu 2 times - ashes
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)
For switching ON/OFF
1. Press menu 1 time - Prog ashes
2. Press OK
3. Change to QUESTION with + or –
4. Press OK
5. Press OK for next time.
And continue to END
6. Press OK
Change of ON/OFF
1. Press menu 1 time - Prog ashes
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
Resetting:
Briey press both + and – at the same time.
For further particulars, see the separate instructions
supplied with the timer.
To INTERRUPT
Press menu
Fläkt Woods 9206 GB 2011.11 6 Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
Chart 1
Zone 1 is the safe zone, in which the water is soft or
demineralized.
Zone 2 is the lower part of the transition zone, in which
the water can be said to be of normal drinking quality.
Zone 3 is the upper part of the transition zone, in which
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 softe-
ning, 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.
Example
Data from the municipal water authority:
pH = 7,6
Bikarbonate 70 mg/l
Calcium 30 mg/l
From Chart 1, the operating point is in zone 1 (safe zone).
680.50 BG 4123sdooW tkälF Specifications are subject to alteration without notice
EU Air Handling Unit INSTALLATION
EUQA Humidifier, for circulated water
Zone 1 is the safe zone, in which the water is soft or
demineralized.
Zone 2 is the lower part of the transition zone, in which
the water can be said to be of normal drinking quality.
Zone 3 is the upper part of the transition zone, in which
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 softe-
ning, 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.
10 10 000
6000
2000
4000
1000
600
400
200
100
60
40
20
10
6
4
2
1
56 7 8 98,5 9,5
42 6 20 40 60 100 1000 10 000
Calcium Ca2+ eulav-Hpl/gm Max. pH of aluminium
Bikarbonate HCO3
–mg/l
Precipitation zone
Transition zone
Safe zone
Determining the water quality zone
The following particulars are required to be able to deter-
mine the water quality zone.
■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 autho-
rity or by analysing the water
Example
Data from the municipal water authority:
pH = 7,6
Bikarbonate 70 mg/l
Calcium 30 mg/l
From Chart 1, the operating point is in zone 1 (safe
zone).
–
pH-value Max. pH of aluminium
Bikarbonate HCO3– mg/l
Water consumption
The water consumption consists of the water evapora-
ted and a certain amount of water bleed-off. This bleed-
off ow is necessary to reduce the consumption of salts
in the circulating water. If the concentration of salts is
too high, salts may be deposited on the humidier ll,
which will have a detrimental effect on the performan-
ce of the humidier.
The chart above can be used to determine the appro-
priate bleed-off ow.
If the humidier has been sized for running over a long
period at a high humidication rate
Δx above 8 grams per kg of air (90% humidier) and
Δx above 5 grams per kg of air (60% humidier) respec-
Calcium Ca2+ mg/l
3
4
2
1
tively is recommended if the water tray is emptied and
ushed twice a day. (See: To set the timer for emptying
and ushing.)
Periods out of service
The controller of the humidier switches to the emptying
mode whenever the fan is switched out.
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 humidier is to be out of service for some time,
the humidier lls should be removed, cleaned and sto-
red in a place where they will not sustain damage.
Fläkt Woods 9206 GB 2011.11 7 Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
680.50 BG 4123sdooW tkälF Specifications are subject to alteration without notice
EU Air Handling Unit INSTALLATION
EUQA Humidifier, for circulated water
Zone 1 is the safe zone, in which the water is soft or
demineralized.
Zone 2 is the lower part of the transition zone, in which
the water can be said to be of normal drinking quality.
Zone 3 is the upper part of the transition zone, in which
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 softe-
ning, 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.
10 10 000
6000
2000
4000
1000
600
400
200
100
60
40
20
10
6
4
2
1
56 7 8 98,5 9,5
42 6 20 40 60 100 1000 10 000
Calcium Ca2+ eulav-Hpl/gm Max. pH of aluminium
Bikarbonate HCO3
–mg/l
Precipitation zone
Transition zone
Safe zone
Determining the water quality zone
The following particulars are required to be able to deter-
mine the water quality zone.
■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 autho-
rity or by analysing the water
Example
Data from the municipal water authority:
pH = 7,6
Bikarbonate 70 mg/l
Calcium 30 mg/l
From Chart 1, the operating point is in zone 1 (safe
zone).
–
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.
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.
Fig. 8
Fläkt Woods 9206 GB 2011.11 8 Specifications are subject to alteration without notice
Maintenance
LQQA Humidifier, for circulated water
Service intervals
Wiring diagram
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
Bleed-off
Level relay
Maintains correct level
Level relay
L3
L2
L1 2
1
0
1
34
5 6
PE
I> I> I>
1 53
2 4 6
WU V
3
M
21
F1
HB
Q1 Q2
K1 K2
CP1 CP2
642
531
N
N
SU1
A2
A1 Timer
Emptying/ Flushing
6A
A2
A1
R1
Auxiliary relay
Emptying/ Flushing
SU1
4
3
5
TF
cno
1 2
CP1
Contactor
A2A1
K1
GM
c no
3 4
15
16
18
15
18
16
15
18
16
MV1
11 12 Solenoid valve
Valve actuator
SV1
13
15
14
3
2
1
NR1
A1 A2
B1
19
18 B2
B3
M
CLevel relay
Prevents operation
when the tray is dry
NR2
A
B3
B2
16 B1
A1 A2
17
A2
A1
B1
B2
B3
B
NR3
Maintains
correct level
4
–
B1
A2
A1
TR1
Delayed
closure, SV1
TR1
15
16
18
R1
11
12
14
R1
21
22
24
R1
31
32
34
1 2 3 4 5
G/G 7 8 6
Control box on outside
Control box on inside
135
246
WU V
3
M
642
3 51
I>I>I>
K2
A1 A2 Contactor
CP2
Humidity control
Interlock
Q1, Q2 Motor protection switch R1 Aux. relay NR3 Level monitor K1, K2 Contactor
F1 Automatic fuse TR1 Time relay HB Main switch TF Supply air fan
SU1 Timer NR1, NR2 Level monitor SV1 Valve actuator GM Hygrostat
  • Page 1 1
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  • Page 6 6
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flakt woods LQQA Maintenance Manual

Brand
flakt woods
Model
LQQA
Category
Water dispensers
Type
Maintenance Manual
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