FläktGroup LQQA Humidifier for circulated water Installation guide

Brand: FläktGroup

Model: LQQA Humidifier for circulated water

Type: Installation guide

FläktGroup DC_9150GB 20180418_R0

Specifications are subject to alteration without notice

INSTALLATION INSTRUCTION

LQQA HUMIDIFIER FOR CIRCULATED WATER

To avoid clogging, ﬁt a water ﬁlter, item 4 (with a max. mesh of 500

μm), between the shut-off valve and the humidiﬁer.

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

Nominal pipe size/Diameter

Water supply pipe Drain connection

No. 20, 3/4” BSP 2 No. 32 dia. conn. male thread

LQQA Size /

Degree of

humidiﬁcation

Number of pumps

Pump: Output, 0,12 kW

Power supply: 3x230 /400 V

Current: 0,71/0,41 A

Pump: Output, 0,18 kW

Power supply: 3x230/400 V

Current: 0,86/0,50 A

60/60-90% – –

62,71,80/60% 1 1

62,71,80/90% – –

64, 73/60–90% 2 –

82, 84/60% 2 –

82, 84/90% – 2

Power supply 3 x 400 V + N + Pa 50 Hz 10 A

Interlock

from SF

Moisture

control

Fig. 1

12 13

Size 60-84

TO CONNECT THE HUMIDIFIER TO THE WATER

SYSTEM

The water supply to a humidiﬁer is controlled by a builtin solenoid

valve. Connect the supply pipe to the inlet branch. Fit a shut-off valve,

item 3.

TABLE 1. CONNECTIONS – NOMINAL PIPE SIZES

WIRING DIAGRAM FOR THE CONTROL BOX ON OUTSIDE

Connect the drain pipe, item 6, to the humidiﬁer drain connection. This

should be ﬁtted with a cleanable water trap, item 5, and should be run,

without reduction in diameter, to a ﬂoor gulley. For size 44, 52–84 hu-

midiﬁers, two water traps should be used in parallel.

The shut-off valve, water trap and water ﬁlter are not included in the

supply.

CONNECTION TO THE POWER SUPPLY

(to be carried out by an authorized electrician)

When making the connections on site, run the power supply cable,

item 1, to the control box through the cable gland ﬁtted to the casing.

External fuse: at least 4 A.

The electrical components inside the control box are protected by a

2A fuse.

The pump is delivered always connected for 3 x 400 V. The pump

motor has degree of protection S 33 (IP 44) and has class B insulation.

LQQA Humidifier for circulated water - Installation instruction

FläktGroup DC_9150GB 20180418_R0

Specifications are subject to alteration without notice

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: 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.

Set the marking 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: 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.

THE HUMIDIFER 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 rotationof the pump, see Fig. 5.

– preset the required supply water ﬂow rate according to Table 2.

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 pre-

set 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 accoring to Table 3, 4

and Fig. 6.

DROPLET ELIMINATOR

Closes the water supply valve when The droplet eliminator ﬁlls must

be correctly ﬁtted for the direction of air ﬂow, see the arrow on the

droplet eliminator.

ZON

ABC

Zon

ZON-skala

Nivåvakt B: inställbar

Inställningsskruv

Nivåvakter

Level monitors

Zone Scale

Level monitor B: adjustable

Adjusting screw

EUQA 2;1

Fig. 3

Fig. 4

Fig. 2

246

EUQA Pump

Adjusting screw

Reading point

Fig. 5

Size

Supply water ﬂow, l/min

Aluminium

90% 60%

TABLE 2. SUPPLY AIR FLOW

LQQA Humidifier for circulated water - Installation instruction

FläktGroup DC_9150GB 20180418_R0

Specifications are subject to alteration without notice

Time relay TR1 has been preset for normal operation. If the time re-

quired 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)

TABLE 3. TIME REQUIRED FOR EMPTYING (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%

240

120

180

240

120

180

240

300

120

Range

Time

ETR4–69–A

Function

1.5 .5

A1~+ 15 B1

A2~-1816

Rel Power

TR1

Fig. 6

Seconds

Range

1 s

Time

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

NR3

NR2NR1

TR1

Fig. 7 Components inside the control box

WATER BLEED-OFF

The water consumption consists of the water evaporated and a certain

amount of water bleed-off. This bleed-off ﬂow 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 humidiﬁer ﬁll, which

will have a detrimental effect on the performance and useful life of the

humidiﬁer.

TO SET THE TIMER FOR EMPTYING AND FLUSHING

For normal function, the timer should be preset to ”ON”. When emp-

tying, which can be programmed to occur once or several (optional)

times every 24-hour period, the timer will reset itself to the ”OFF” set-

ting 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.

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 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 12.00-12.10 and

12.12 - 12.15.

Chart 1 can be used to determine the appropriate bleed-off ﬂow, to

suit the water quality zone and the humidiﬁcation rate. Level sensor B

should be preset to the appropriate zone, correct bleed-off will then be

achieved.

In order to insure that the water tray is kept clean, it is advisable to

drain and ﬂush it every day (preset at the factory at 12.00–12.15 hours).

If high demands on hygiene are made or if the humidiﬁer runs 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 % humidi-

ﬁer), it is advisable to program an additional daily draining and ﬂushing

cycle.

LQQA Humidifier for circulated water - Installation instruction

FläktGroup DC_9150GB 20180418_R0

Specifications are subject to alteration without notice

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.

– Date and time in the time zone where it is to be used.

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)

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.

And continue to END

6. Press OK

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

RESETTING:

Brieﬂy press both + and – at the same time.

For further particulars, see the separate instructions supplied with the

timer.

To INTERRUPT

Press menu

The numbers under the display indicate days of

the week

1 = Monday, 2 = Tuesday, etc.

1 2 3 N

MENU OK

1 2 3 4 5 6 7

Auto

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

LQQA Humidifier for circulated water - Installation instruction

FläktGroup DC_9150GB 20180418_R0

Specifications are subject to alteration without notice

DETERMINING THE WATER QUALITY ZONE

The following particulars are required to be able to determine 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 authority or by

analysing the water.

CHART 1

EXAMPLE

Data from the municipal water authority:

pH = 7,6

Bikarbonate = 0 mg/l

Calcium = 30 mg/l

From Chart 1, the operating point is in zone 1 (safe zone).

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 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.

10 10 000

6000

2000

4000

1000

600

400

200

100

567898,5 9,5

42620 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

pH-value Max. pH of aluminium

Bikarbonate HCO3– mg/l

Calcium Ca2+ mg/l

FläktGroup LQQA Humidifier for circulated water Installation guide

FläktGroup LQQA Humidifier for circulated water Installation guide

FläktGroup LQQA Humidifier for circulated water Installation guide

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