FläktGroup EUQA Humidifier Installation guide

Brand: FläktGroup

Model: EUQA Humidifier

Type: Installation guide

FläktGroup EUQA Humidifier is intended for use in air-handling units to increase the humidity in the air. The humidifier is of the spray-type, which means that water is sprayed into the air stream and then evaporates from the humidifier fills. The unit is designed for connection to a water supply and drain. The water flow is controlled by a solenoid valve, and the unit is equipped with a level sensor to prevent overfilling. The humidifier fills are made of aluminium and are replaceable. The unit is supplied with a droplet eliminator to prevent water droplets from being carried along with the air stream.

Connection to the electrical system

(To be carried out by an authorized electrician)

When making the connections on site, run the power

supply cable to the control box across an external high

voltage switch and through the cable gland fitted in the

casing. The control box is protected by an internal 2A

fuse.

The pump(s) supplied is/are always wired for 3 x 400

V. The pump motors have degree of protection S 33 (IP

44) and class B insulation.

Table 2.

Number of pumps

EUQA Size/

Humidification rate

20-42, 50, 51 60%-90% 1 –

44, 52, 53, 60 60%-90% – 1

62, 71, 80 60% 1 –

62, 71, 80 90% – 1

64, 73 60%-90% 2 –

82, 84 60% 2 –

82, 84 90% – 2

Connection to the water system

The water supply is controlled by a built-in solenoid

valve. Connect the supply pipe to the inlet branch. Fit a

shut-off valve, Item 2, in the water supply pipe.

Table 1. Connection sizes

To avoid clogging, fit a water filter, Item 3 (with a max.

mesh of 500 µm) between the shut-off valve and the

humidifier.

Connect the drain pipe, Item 5, to the humidifier drain

connection. The drain should be fitted with a cleanable

water trap, Item 4, and should run, without reduction

in diameter, to a floor gulley. On size 44 and 52 through

84 units, two water traps coupled in parallel should be

used.

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

included in the delivery.

EUQA Humidifier, for circulated water

Fläkt Woods 8273 GB 2007.06 1 We reserve the right to alter specifications.

EU Air handling unit INSTALLATION/MAINTENANCE

11 12

1. Control box, external

2. Shut-off valve (not included)

3. Water filter, with a max mesh

of 500 µm (not included)

4. EUAZ-08 Water trap (acces-

sory)

5. Drain pipe

6. Humidifier fill

7. Droplet eliminator

8. Spray pipes

9. Pump

10. Flow controller

11. Valve with motor actuator

12. Overflow hose

13. Level sensor

14. Solenoid valve

15. Flushing hose

16. End plug

17. Spacer plate

Size 20–42, 50, 51

Size 44, 52,

53–84

Fig. 1

Connection number/Diameter

Size Supply connection/ Drain connection

(male threads)

20-42, 50, 51 No. 15 R 1/2" No. 32, R 1 1/4"

female threads

44, 52-84 No. 20, R 3/4" 2 drains 32 dia.

Output:

0,12 kW

Voltage:

3 x 230 /400 V

Current:

0,71/0,41 A

Output:

0,18 kW

Voltage:

3 x 230 /400 V

Current:

0,86/0,50 A

Items to check when making adjustments

The water:

Determine the proportion of calcium, bicarbonate and

pH-value of the water. This information can be

obtained from a water analysis or from the local water-

works. Plot the values obtained in Chart 1 on page 4 to

determine in which zone the water can be classified. If

the water is of zone 4 type, it should be softened.

The humidifier function:

- Switch on the external switch. The water tray starts to

fill with water, if the TF1 input is closed.

Now check:

- that the pump has started and that it is pumping

water, (the RH1 input should be closed).

If there is no water flow, change the direction of rota-

tion of the pump. See Fig. 3

- preset the required supply water flow rate according

to Table 3. This is done by setting the adjustment

screw on the flow controller, Fig. 4.

- that water is being discharged from all 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 (Item 16, Fig. 1), 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 A.

- that the water bleed-off rate is correct. Press and hold

down the –button on RC1 to force the drain valve

to open. See Fig. 2! When the water level has dropped

below Level B, the valve will open completely and

"Emptying" will appear on the display screen. When

the level drops below Level C the water inlet valve

should open and after a preset period the drain valve

should start to close.

If the water level continues to drop below level C, the

water inlet valve should open and after a preset peri-

od the drain valve should to close.

When the water level reaches Level C, the pump

should briefly stop; then continue operating.

Droplet eliminator

Mount the droplet eliminator in the correct direction of

airflow. See the arrow on the droplet eliminator.

EUQA Humidifier, for circulated water

Fläkt Woods 8273 GB 2007.06 2 We reserve the right to alter specifications.

EU Air handling unit INSTALLATION/MAINTENANCE

246

Fig. 3

Adjustment screw

Reading point

Fig. 5 Level sensor

Fig. 4

Fig. 2

Table 3. Supply water flow

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

Closed

Open

Water bleed-off

The water consumption consists of useful evaporation

of water and a necessary water bleed-off flow. This

bleed-off flow is necessary to reduce the concentration

of salts in the circulating water. If the concentration of

salts is too high, salts may be deposited on the humidi-

fier fills, which will have a detrimental effect on the

performance and useful life of the humidifier.

Chart 1 can be used to determine the appropriate

bleed-off flow, by determining zone for the current

water quality. Then set the appropriate zone in the

display and read the correct bleed-off flow.

In order to ensure a good water quality in the water

tray, it is advisable to empty and flush the tray clean

once a day (factory-preset to occur from 12.00 to 12.15

hours).

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

fication rate is to be high on the long term, .x > 8 gram

per kg air (90% humidifier) or. .x > 5 gram (60% humid-

ifier), we recommend planning an extra daily drainage

and flushing clean. If required, the dilution period can

be lengthened. See Table 4. The value (T) is set on the

display.

EUQA Humidifier, for circulated water

Fläkt Woods 8273 GB 2007.06 3 We reserve the right to alter specifications.

EU Air handling unit INSTALLATION/MAINTENANCE

Table 4. Presetting the dilution period

Time for dilution, seconds

Size Normal operation High humidification

Pre-set value over a long period

b = 1 b = 2 ∆x >8 gram ∆x >5 gram

90% 60% 90% 60%

20 0 0 0 0

21 10 0 20 0

22 20 0 30 10

30 10 0 20 0

31 10 0 20 0

32 20 0 40 10

33 30 0 60 20

40 30 0 90 20

41 30 0 80 20

42 50 0 100 30

44 60 0 120 40

50 40 0 80 30

51 70 0 120 50

52 55 0 55 20

53 60 0 60 20

60 30 0 30 0

62 60 0 90 0

64 60 30 240 120

71 60 30 180 90

73 90 60 240 120

80 90 60 180 120

82 90 60 240 120

84 120 60 300 120

Chart 1

Zone 1 is the safe zone, in which the water is soft or

demineralised.

Zone 2 is the lower part of the transition zone, in which

the water is normally of normal drinking water 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 partially demineralised so that the

result will be a water quality that corresponds to

zone 2-3.

However, the water must not be demineralised to

the point that water of zone 1 quality is obtained.

Besides the risk of lime precipitation, the concentration

of chloride (C1) and copper (Cu) must be considered.

The concentration in fresh water must not exceed

50 mg/l for chloride and 0.02 mg/l for copper.

EUQA Humidifier, for circulated water

Fläkt Woods 8273 GB 2007.06 4 We reserve the right to alter specifications.

EU Air handling unit INSTALLATION/MAINTENANCE

10 10 000

6000

2000

4000

1000

600

400

200

100

567898,5 9,5

42 6 20 4060100 1000 10 000

Calcium Ca2+ mg/l pH value Max. pH aluminium

Bicarbonate HCO3

–mg/l

Precipitation zone

Transition zone

Safe zone

To determine the water quality zone

The following information is needed to determine the

water quality zone:

• pH-value

• Bicarbonate concentration (HCO3 ), mg/l

• Calcium concentration (Ca2+), mg/l

Information on the water can be obtained from the

local waterworks or by water analysis.

Example

Data from the local waterworks:

pH = 7,6

Bicarbonate 70 mg/l

Calcium 30 mg/l

Chart 1 the water is in zone 1 (The safe zone)

EUQA Humidifier, for circulated water

Fläkt Woods 8273 GB 2007.06 5 We reserve the right to alter specifications.

EU Air handling unit INSTALLATION/MAINTENANCE

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. 6.

D. Withdraw the droplet eliminators and humidifier

fills straight out of the humidifier. See Fig. 6.

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.

Interrupted operation

The control unit of the humidifier switches over to the

emptying mode as soon as the fan is shut down.

Drain and clean the water tray whenever the system is

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 from the

humidifier, cleaned and stored in a place where they

will not sustain damage.

Fig. 6

Service intervals

Component Service work Interval, months

Casing (water tray, Drain the water tray. Clean the interior by flushing, 3

ends, top, guide rails) wiping or brushing, if necessary.

Humidifier fills Clean by flushing with water, possibly with ULCZ-01 cleaning agent,

Droplet eliminator agent, particularly if the humidification performance 3

has deteriorated.

Water filter Clean or replace the filter cartridge, if necessary. 3

(The mesh must not exceed 500 µm.)

Level sensor Check the water sensor and adjust as necessary. 3

Water flow Clean the spray pipes as necessary. 3

Water trap Clean and refill. 6

Water quality See "Measures when making adjustments". 12

EUQA Humidifier, Control equipment

Fläkt Woods 8273 GB 2007.06 6 We reserve the right to alter specifications.

EU Air handling unit INSTALLATION/MAINTENANCE

Control equipment

The control box is located on the exterior of the func-

tional section.

The components inside the humidifier, such as the

ultrasound sensor, solenoid valve, actuator and circu-

lation pumps

1-2 are wired to the junction box.

Ultrasound sensor

The ultrasound sensor has a 0-10V analogue output

which enables water level readings in the display with

an accuracy of a few millimetres.

Monitor and keypads

The monitor

The monitor screen displays 4 lines with 12 characters

on each line.

The keypads

The arrow right key is used for navigat-

ing between the 7 images on the screen

showing running information and other

settings. See below.

If the arrow left key is held depressed,

this will force the drain valve to open.

(For performance testing)

All the arrow keys are used for moving

the flashing cursor between the various

fields on the screen.

The plus and minus keys are used for:

- increasing and decreasing a flashing

value

- selecting between On and Off.

The ESC key is used for :

- advancing one step upward in the menu

tree

- removing a flashing cursor

- resetting alarms/alarm outputs

The OK key is used for:

- confirming a selection

Information images

1. In-operation information in Swedish.

2. In-operation information in English.

3. In-operation information in German.

4. For setting the water quality zone and time delay T

for the dilution of fresh water.

5. For setting the cleaning period for cleaning the

humidifier fills and water tray. (1-2 x 15 min. / day)

6. For reading the factory preset values for each water

level A, B1, B2, B3 and C, and the sensor's scaling

factor F and pump function CP.

7. For setting the time.

Image 1. In-operation information in

Swedish

Line 1 shows: NOT RUNNING, RUNNING,

HUMIDIFYING

Line 2 shows: DRAINING, DILUTION, FILLING,

CLEANING

Line 3 shows: ALARM CP1-Q1, ALARM CP2-Q2,

ALARM SENSOR, ALARM LEVEL,

Line 4 shows: WATER 45 mm

Image 2. In-operation information in

English

Image 3. In-operation information in

German

ESC

–

ESC

–

- - - D R I F T - - - -

- Q 1

PÅFYLLNI NG

ALARM CP1

VATTEN 45mm

- - R N - - -

FI LLI NG UP

ALARM CP1

WA T E R 4 5 mm

FI LLI NG

I N G

ALARM CP1

WA T E R 4 5 mm

- Q 1

BETRI EB- AN

NACHFÜLLUNG

ALARM CP1

WASSER 45mm

- Q 1

EUQA Humidifier, Control equipment

Fläkt Woods 8273 GB 2007.06 7 We reserve the right to alter specifications.

EU Air handling unit INSTALLATION/MAINTENANCE

Press the arrow down key 2 times to the last line and

00:00 OFF appears there.

The first field is flashing. Enter 18 (h).

Select next field. Enter 30 (min).

Select next field. Enter the ON function.

The last line now reads: 18:30 ON.

CAUTION! Do not change lines 1-3.

Press OK to return to Image 5.

Example: To set the stop time, 18:45 Off.

Press the arrow down key 4 times so that the 00:00 field

flashes. Press OK.

Astop time program will now be shown.

Press the arrow down key 2 times to the last line and

there it reads 00:00 OFF.

The first field is flashing. Enter 18 (h).

Select the next field. Enter 45 (min).

Select the next field. Enter the OFF function

The last line now reads: 18:45 OFF.

CAUTION! Do not change lines 1-3.

Press OK to return to Image 5.

15mi n CLEAN.

REI NI GUNG

12: 00- 12: 15

18: 30- 18: 45

Image 4. To select the water quality zone

and time delay.

Do the following to change zone.

Press the arrow down key so that number 2 flashes.

Press the + or - key to change to the zone required: 1, 2

or 3. Then press OK.

If a value lower than 1 is selected, zone 1 will still apply.

If a value higher than 3 is selected, zone 3 will still

apply.

Do the following to change the time delay.

Press the arrow down key 2 times to make the value

flash. Press the + or - key to change to the value

required. Then press OK.

Image 5. To set the cleaning period

The humidifier should be drained and flushed for 15

min 1-2 times/day. The period: 12:00 -12:15 has been

preset (can of course be altered, if needed).

Asecond cleaning period is available. On delivery, it is

preset to 00:00 - 00:00.

If desired, you can set it to 18:30 -18:45; just remember

to set the start time as ON and the stop time as OFF on

the monitor screen.

CAUTION! The period selected must always be a 15

minute period.

Use the arrow keys to advance to the next flashing field

and change the appropriate value by pressing the + or -

key.

Example: To set the start time, 18:30 On.

Press the arrow down key 3 times so that the 00:00-

field flashes.

Press OK.

Now a time program for the start time will be shown.

ZON/ ZONE : 2

( 1 - 3 )

VERZÖGERUNG

DELAY T= 20

15mi n CLEAN.

REI NI GUNG

1 2 : 0 0 - 1 2 : 1 5

0 0 : 0 0 - 0 0 : 0 0

EUQA Humidifier, Control equipment

Fläkt Woods 8273 GB 2007.06 8 We reserve the right to alter specifications.

EU Air handling unit INSTALLATION/MAINTENANCE

Image 6. Preset levels and parameters

(Can be altered after entering a password)

S = Height of the ultrasound sensor above the

bottom of the water tray.

A = Max. water level when filling.

C = Min. water level. (Pump stopped).

F = Adjustment/scaling of the sensor's output

signal.

B3 = Level for zone 3

B2 = Level for zone 2

B 1 = Level for zone 1

CP = 1-4: How the pump(s) should operation when

the inputs for hygrostats RH1 and RH2 respec-

tively are closed.

1 pump, 1 step

CP = 1, RH1 starts CP1, RH2 is disconnected.

Alarm from CP2 is interlocked.

2 pumps in parallel

CP = 2, RH1 starts both CP1 and CP2, (factory

setting) Can also be used if only CP1 exists.

2 pumps in sequence

CP = 3, RH1 starts CP1, RH2 starts both CP1 and

CP2.

2 pumps, binary mode

CP = 4, RH1 starts CP1, RH2 starts CP2, RH1+RH2

starts both CP1 and CP2.

Caution! The pumps will be interlocked if the water

level is low, if the unit is idle and if an alarm

is initiated from the relevant overload

protection.

Image 7. To set the clock

The clock must always be set if the unit has been with-

out current for approx. 100h.

Summer/winter time changeover occurs automatical-

ly according to EU Standard.

Do the following to alter the time.

Press the arrow down key so that the clock time flashes.

Press OK.

The Date and Time Image now appears on the screen.

Only the time needs to be set.

Use the arrow keys to move the flashing field and

change each value with the + and - keys.

When you've set the time, press the OK key to return to

Image 7.

S=120 B3= 53

A= 73 B2= 33

C= 20 B1= 28

F=540 CP= 2

TID

ZEIT

TIME

08:55

(55)(08)

YYYY/MM/DD

: 55

2006 / 03 / 07

Ex.

ClockSet

TID

ZEIT

TIME

08:55

EUQA Humidifier, Control equipment

Fläkt Woods 8273 GB 2007.06 9 We reserve the right to alter specifications.

EU Air handling unit INSTALLATION/MAINTENANCE

To zero calibrate the ultrasound sensor

The sensor has been zero calibrated for an empty water

tray in the Fläkt Woods workshop. If the need for a zero

calibration should arise in the future, the lock nuts of

the sensor can be used for adjusting its height position.

The sensor should first warm up prior to calibrating,

i.e. operate for at least 15 minutes after switching on the

power. During the warm-up time, the display may

show a water level that is a few millimetres in error.

Alarms

There is a potential-free group alarm output in the

junction box.

The alarms that appear on the monitor screen are as

follows:

Alarm level

The water level continues to rise above the max. level

”A”. This is probably due to the solenoid valve MV1

not shutting. An alarm is initiated after 5 min.

The water level has not reached max. level ”A” while

filling. This is probably due to the following: the sole-

noid valve MV1 does not open, the water tap is shut off,

or the drain valve SV1 does not close. An alarm is initi-

ated after 30 min.

The sensor detects unreasonable values, outside its

detection range, is not properly directed towards the

surface of the water or has stopped operating. This is

also shown on the LEDs of the sensor: both shine red.

An alarm is initiated after 5 min.

Alarm CP1-Q1 or CP2-Q2

Has been initiated because the overload protection for

circulation pump CP1 or CP2 has tripped.

Alarm reset

Press the ESC keypad to reset the alarm.

Fig. 7 Components inside of the control box

RC1

ESC

11-15

1-9

PE N

T1, Transformator 230VAC/24VDC

RC1, Reglercentral (PLC)

K1-K2, Kontaktor

Q1-Q2, ÷verlastskydd

F1, S‰kring 2A

F1, Fuse 2A

T1, 230VAC/24DVDC Transformer

RC1, Controller (PLC)

K1-K2, Contactor

Q1-Q2, Overload protection

EUQA Humidifier, Control equipment

Fläkt Woods 8273 GB 2007.06 10 We reserve the right to alter specifications.

EU Air handling unit INSTALLATION/MAINTENANCE

Wiring Diagram

LNPE

SV 1

0-10V

Alarm

TF 1

643

Q 2

Q 1

RH 1

RH 2

MV 1

CP 2

CP 1

K1 K2

Q1 Q2

TERMINAL

SV 1 L1

RC1

95 96

CP1 CP2

246

513

Brown

Blue

Shielded

White

Level sensor

PEPE

3-phase 3-phase

Solenoid valve

GU1

Valve actuator

312

MV1

SV1

Circulation pump(s)

Alarm output

(Hygrostat RH2)

Hygrostat RH1

Start signal from TF1

230VAC / 24VDC

Contactor Contactor

Overload protection Overload protection

Transformer

External high-voltage switch

3x400VAC+N+PE

50 Hz

15 Grey

0.41/0.50A 0.41/0.50A

Max 250VAC 8A

Alarm

Normally-open

Normally-closed

Black

Brown

Blue (Grey)

Brown

Black

Blue (Grey)

Light blue

Dark blue

Grey

Green

Brown

Brown Blue(grey)

Black

Brown

Blue

Brown

Red

Yellow

Violet

Orange

Grey

Dark blue

White

Ledarna skall ändmärkas

Controller (PLC)

264

135 A2

246 A1

2956496

FläktGroup EUQA Humidifier Installation guide

FläktGroup EUQA Humidifier Installation guide

FläktGroup EUQA Humidifier Installation guide

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