Transcript
Maintenance
LQQA Humidifier, for circulated water 18
3
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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
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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
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9206 GB 2011.11
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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.
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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
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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
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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”.
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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
