LQQA Humidifier, for circulated water

Transcription

1 Size Fig Control box, on the outside. Control box, on the inside. Shut-off valve (not included) 4. Water filter, max. 5 mm mesh (not included) 5. LQAZ-8 Water trap (accessory) 6. Water supply pipe 7. Humidifier fill 8. Droplet eliminator 9. Spray pipe. Pump. Flow controller. Valve with motor actuator. Overflow hose 4. Water level sensor 5. Solenoid valve. Flushing hose 7. End plug 8. Side wall 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 A B C Level monitors 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. 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 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. ) 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: 5 mm from the bottom of the water tray (sizes 84) Fig. Z ON Zone Scale Level monitor B: Adjustable Adjusting screw Zon Level relays: NR, NR and NR are shown in Fig. 7. The level relays are preset at a sensibility of 4 kω. If softened water is used and the level monitors don t work, the sensibility setting can be increased to kω. Fläkt Woods 96 GB. Specifications are subject to alteration without notice

2 Maintenance adjustments (Contd.) 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. 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 (7), 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.. 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 preset period (see Table, 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, and Fig. 6. Droplet eliminator The droplet eliminator fills must be correctly fitted for the direction of air flow, see the arrow on the droplet eliminator. Table. Supply water flow Size Supply water flow, l/min Aluminium 9% % Adjusting screw Reading point Fig. Fig. 4 Fig. 5 Fläkt Woods 96 GB. Specifications are subject to alteration without notice

3 Table. Presetting the time relay Size Normal operation preset value Time required for emptying Time relay TR 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:. Select Function. Select the Range. 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 4 sec. Select a Range of sec. (black digits) Select a Time of 4 (black digits) High humidification over a long period Δx >8 gram Δx >5 gram 9% % 9% % s A~+ 5 B Range Time M ETR4 69 A Rel Power TR Fig. 6 8 Function A~- Table. Presetting time relay TR Seconds Range s Time s red s black s black 4 s 4 red 5 s 5 red s 6 red 7 s 7 red 8 s 8 red 9 s 9 red s red s black 8 s 8 black 4 s 4 black s black K Q R TR NR NR NR Fig. 7 Components inside the control box Fläkt Woods 96 GB. Specifications are subject to alteration without notice

4 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 (HCO ), mg/l the calcium concentration (Ca+), 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 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 5 mg/l and that of Cu must not exceed. 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 4-hour period, the timer will reset itself to the OFF setting for minutes. After that, the timer will reset itself to ON for minutes to allow flushing. The timer will then reset itself to the OFF setting for minutes for additional emptying before resetting itself back to ON for normal operation. In the following example, emptying and flushing are required once every 4 hours from. to.5 as scheduled below. Period Timer setting Activity.. ON Normal operation.. OFF Emptying.. ON Flushing..5 OFF Additional emptying.5 4. ON Normal operation This can be done most easily by programming the operation times from.5 to. and from. to. on a daily basis! Emptying and additional emptying will then occur from Fläkt Woods 96 GB. 4 Specifications are subject to alteration without notice

5 Timer The timer has been preset at the factory for emptying and flushing as described above once every 4-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. Day-by-day summary of the programmed connection times. Example: 5 = Friday Duct status ON = On, OFF = OFF Maintenance voltage OK: Indicated by flashing points between the numbers on the display. Running reserve mode: Indicated by flashing points between the numbers on the display. Choice of function: Ex: Auto, Prog, Pulse, Cycle, Delete 4 Auto MENU OK - + L N Display of special functions: Manual operation Permanent ON/OFF Symbols which indicate summer/winter function: Summer Winter The numbers under the display indicate days of the week = Monday, = Tuesday, etc. Choice Yes means choice of programming. Choice No means continue. N L L Change of current time of day. Press menu times - flashes. Press OK Display shows YEAR, change with + or. 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. Press menu time - Prog flashes. Press OK. Change to QUESTION with + or 4. Press OK 5. Press OK for next time. And continue to END 6. Press OK To INTERRUPT Press menu Change of ON/OFF. Press menu time - Prog flashes. Press OK Read text in the display! Select with + or Store with OK Manual operation of ON/OFF. Press both + and at the same time. ~ sec gives manual ON/OFF, (returns automatically) ~ 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. Fläkt Woods 96 GB. 5 Specifications are subject to alteration without notice

6 Chart Zone is the safe zone, in which the water is soft or demineralized. Zone is the lower part of the transition zone, in which the water can be said to be of normal drinking quality. Zone 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. However, the softening treatment must not lower the quality of the water to zone. Example Data from the municipal water authority: ph = 7,6 Bikarbonate 7 mg/l Calcium mg/l From Chart, the operating point is in zone (safe zone). Calcium Ca + mg/l ph-value e Max. ph of aluminium Transition zone Safe zone Precipitation zone ,5 9 9, Water consumption The water consumption consists of the water evaporated and a certain amount of water bleed-off. This bleedoff 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 of the humidifier. The 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 (9% humidifier) and Δx above 5 grams per kg of air (% humidifier) respec- tively is recommended if the water tray is emptied and flushed twice a day. (See: To set the timer for emptying and flushing.) Periods out of service The controller of the humidifier 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 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. Bikarbonate HCO mg/l Fläkt Woods 96 GB. 6 Specifications are subject to alteration without notice

7 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- 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 96 GB. 7 Specifications are subject to alteration without notice

8 Service intervals Component Service work Interval, months Casing (water tray, ends, top, guide rails) Humidifier fills Droplet eliminator Water filter Drain the water tray. Clean the interior by flushing, wiping or brushin if necessary. Clean by flushing with water, possibly with ULCZ- cleaning agent, particularly if the humidification performance has deteriorated. Clean or replace the filter cartridge, if necessary. (The mesh must not exceed 5 μm.) Level monitor Check the water level and adjust as necessary. Water flow Clean the spray tubes as necessary. Water trap Clean and refill. 6 Water quality See under maintenance adjustments. Wiring diagram L L L N PE HB N SU Control box on outside F 4 A A 4 Timer SU 5 6 TF Emptying/ Flushing 6A 4 5 c no Interlock GM 4 c no Humidity control G/G NR Control box on inside 9 R M B Auxiliary relay 8 Level relay C B A A Prevents operation Emptying/ Flushing 5 5 B when the tray is dry K Q Q R Contactor A A CP K A A Contactor A A CP I> I> I> I> I> I> NR K U V W M CP K U V W M CP A B 7 A B B B 5 A 8 Level relay Maintains correct level Level relay Bleed-off 5 B B B A NR A 8 5 TR R R MV Solenoid valve Maintains correct level SV 4 B A TR A 5 Delayed closure, SV Valve actuator Q, Q Motor protection switch R Aux. relay NR Level monitor K, K Contactor F Automatic fuse TR Time relay HB Main switch TF Supply air fan SU Timer NR, NR Level monitor SV Valve actuator GM Hygrostat Fläkt Woods 96 GB. 8 Specifications are subject to alteration without notice