Humidifier
System
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Humidifier Cylinders
KUE…3
KUE…2
KUE…R
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Humidifier System
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Humidifier System
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Humidifier System
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Humidifier System
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Humidifier System
The following conditions represent correct water connection:
• Installation of a shut –off tap in the supply water line
• presence of a mechanical filter in the supply water line
• water temperature and pressure within the allowed values
• Drain hose resistant to temperatures of 100 °C
•Minimum slope of the drain hose greater than or equal to 5°
•Electrically non –conductive sleeve
•Presence of a drain pan in the drain hose
IMPORTANT WARNING: when installation is completed, flush the supply hose for around
30 minutes by piping the water directly into the drain without sending it into the humidifier.
This will eliminate any scale or processing residues that may block the fill valve or cause
foam when boiling.
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Humidifier System
Characteristics of the water
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Humidifier System
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Humidifier System
In the UNIFLAIR products the humidifier bottle for water medium-high conductivity from 3001250ΩSiemens (available as special option humidifier bottle for low conductivity from 125 to 300
ΩSiemens )
AMICO Steam production 1,5/3 Kg/h Uniflair code UMCV032X1A
LEONARDO EVOLUTION Steam production 5/8 Kg/h Uniflair code UMCV034X1A
LEONARDO MAX Steam production 10/15 Kg/h Uniflair code UMCV040X1A
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Humidifier System
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Humidifier System
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Humidifier System
The goal of the algorithm is to control the current flowing through the electrodes at the
reference value needed to produce the percentage of steam required (by the user
parameter set and by room regulation).
Due to the evaporation, the water level goes down and, as the measured current
depends directly and proportionally on the water quantity inside the bottle, to keep it at the
required value (Itarget) it should be necessary to fill continuously the bottle with very small
water quantity.
As this is not possible, the measured current is controlled between two values:
•Itarget – 5% Itarget
•Itarget + 10% Itarget
by means of “feed/evaporating” cycles as shown in the following diagram:
It = Itarget
It + 10% It
It
It - 5% It
Imeasured
feed
evaporating
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Humidifier System
Besides the water level in the bottle, the other determinant factor which affects
the outgoing of the measured current, is the water conductivity inside the
bottle.
In fact, during the feed/evaporating cycles the water conductivity will gradually
increase, due to the salt concentration going up in the water inside the bottle.
The measure of the water conductivity inside the bottle is carried out indirectly,
by counting the time spent to complete an evaporating cycle
Then this time is compared with the reference value (characteristic of each model of bottle) and, if
less than this last, a certain quantity of water draining is performed (named dilution draining) then
followed by feeding of less conductive water of network.
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Humidifier System
The humidifier has then a conductivity meter which is capable to detect the network water
conductivity coming inside when feeding. In case of high conductivity detection, the control
algorithm inhibits the operation of the humidifier and give an alarm (that is displayed inclusively
as high current alarm). This is to avoid that the incoming of high conductivity water can
compromise the correct working of the humidifier.
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Humidifier System
An other important element is the high level sensor, made up of two short electrodes placed
on the roof of the bottle. The high level sensor detects the water high level or the possible
presence of foam.
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Humidifier System
SETTING OF HUMIDIFIER PARAMETERS
access to the screen which permits the setting of the
humidifier parameters, please carry out the following
procedure:
•Make the unit stop in stand-by (see UG40 user manual);
•From the main screen, press Prg key, select Service
Menu and confirm by pressing Enter;
•Type in the Password Service (see envelope enclosed
with the user manual) and confirm by pressing Enter;
•select Software Settings and confirm by pressing Enter;
Scroll down the screens by pressing the Down key until
the screen below appears on the display
Humidifier Set Up Screen.
It allows to set the proper size model of
humidifier fitted into the unit (Humid.Mod.:
KUE... – normally already done in factory) and to
reduce the steam capacity related to the nominal
production (Max.Steam Prod.%).
The last row parameter if set to Y enables the
cyclical draining in time (see next screen).
N.B.: The shown values are for example only
and can be different from values found on field.
Humid.Mod: KUE2-5kg/h
V:400/3 Tam100-1turn
Steam Cap.: kg/h 3.5
Nom.Current: A 6.4
Max.Steam Prod. % 070
(30-100%Nom.Cap.)
Timed Drains Enable:N
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Humidifier System
Timed Drains parameter set screen.
This screen is visible if previous Timed drains Enable is set to Y.
It allows to set how many starting of the humidifier (Number of
Startups:) have to pass before activating the draining valve and how
long (Drain Time:) is the draining. This special function allows to reduce
the salt concentration inside the humidifier bottle, especially where the
control algorithm is not capable to operate correctly due to the very short
periods of humidifier continuous working.
HUMIDIFIER
TIMED DRAINS SETTING
Timed Drains After
Number of Startups: 05
Drain Time:
030
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Humidifier System
STATUS SCREEN
Humidifier status screen.
Mode: it shows the current working mode of the bottle. It can have the
following values: “----“ when humidifier is not operating;
”Warm-Up” during the initial phase of heating of the water inside the
bottle;
“Running” when steam production is on;
“Foam" if there is foam presence inside the bottle (this condition is
automatically controlled by activating the anti-foam algorithm);
"Full Bottle" when the bottle needs to be replaced as it is full of scales;
"Power Loss" this alarm indicates the absence of power supply to the
bottle. Can appear also when the bottle is saturated (full of scale) and
needs to be replaced or in case of very low production of steam or very
low current absorption.
"High Current" this alarm is generally due to conductive scales stuck on
inside bottle surface, because of the presence of iron particles in the
scales; see par. technical notes.
Status: it shows the operative status. It can have the following values:
“----“when humidifier is not operating;
“Boiling” normal condition of steam production;
“Drain” when actuating the solenoid valve to drain water from the bottle;
“Fill” when actuating the solenoid valve to charge water into the bottle.
Mode: Running
Status: Boiling
Steam Prod. Kg/h 02.3
Saturated Cylinder: No
High Level:
No
Conductiv.: S/cm 0243
Meas.Current: A 04.2
Nom.Current: A 06.4
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Humidifier System
Steam Prod. Kg/h: shows the present production in kg/h of steam of the humidifier.
Saturated Cylinder: it shows that the bottle is full of calcareous scales: this is to warn that the
steam production is reduced due to the bottle situation (in case it is necessary to clean or
replace the bottle).
High Level: It shows if the filling of water has reached the top limit of the bottle so that the
level electrodes (placed in the roof of the bottle) touch the water surface. This conditions
inhibits the operation of fill solenoid valve.
Conduct.: S/cm it is the value of the conductivity of the humidifier feed water; the value is
updated at every filling of water.
N.B.: Due to the measuring mode, this is an approximate value.
Meas. Current: it shows the TAM measured (present)
value of the flowing current in the humidifier
Mode: Running
electrodes.
Status: Boiling
Nom. Current: is the nominal value of the humidifier
Steam Prod. Kg/h 02.3
current (it depends on humidifier size and on nominal
Saturated Cylinder: No
voltage).
High Level:
No
N.B.: The two values of current, measured and
Conductiv.: S/cm 0243
nominal, can differ even considerably without
Meas.Current: A 04.2
being moreover an index of anomaly, because the
Nom.Current: A 06.4
steam production is modulated between 20% and
the maximum value set, proportionally to the
room requirement.
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Humidifier System
The values of working hours and of number of starting of the humidifier bottle are necessary to
evaluate the status and the durability of the bottle. To have access to these information:
•From the main screen, press Prg key, select Settings Menu and confirm by pressing Enter;
•Type in the Setting Password (see envelope enclosed with the user manual) and confirm by
pressing Enter;
•select Hourmeter Settings and confirm by pressing Enter;
•Scroll down the screens by pressing the Down key until the screen below appears on the
display:
HUMIDIFIER
Total Run Hours 00021
Alarm Limit
00000
Reset:
N
Start.Number: 000097
Reset:
N
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Humidifier System
WORKING HOUR AND STARTING COUNTER SCREEN
•
•
•
•
•
•
•
•
Total Run Hours: it is the value of the working hours of the
humidifier bottle.
N.B.: The hour counting is proportional to the steam production
percentage (e.g. if the bottle operated for 2 hours at 50% of its
nominal capacity, the number of counted hours is 1).
Alarm Limit: it allows to set a threshold of working hours, that,
once reached, activates the signaling “SERVICE” to require the
programmed maintenance. Its factory value is 0 (none alarm).
Reset: Command to clear (zeroing) the working hour counter.
Start.Number: it shows the total number of energizing of the
humidifier relay. This value can help to understand how is working
the humidifier: in case of running in continuous mode or long
period (preferable) the shown value will be relatively low
compared to the total running hours; vice versa in case of short
running period (that indicates a capacity too much higher than the
room needs) the starting number will be very high, even 10-20
times greater than the running hours.
Reset: Command to clear (zeroing) the starting number counter.
HUMIDIFIER
Total Run Hours 00021
Alarm Limit
00000
Reset:
N
Start.Number: 000097
Reset:
N
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Humidifier System
PHENOMENA RELATED TO TH AND sR, 20°C (QUALITATIVE)
R, 20°C [µS/cm]
< 350
TH
[°fH]
350-700
700-1250
SOFT OR SOFTENED
SOFT OR SOFTENED
WATER. HIGH
SLOW TO
WATER. PROBABLE:
< 15
PROBABILITY OF: FOAM,
STEADY-STATE FOAM, ELECTRODE
ELECTRODE CORROSION,
CORROSION
SPARKS
FOAM.
SOFT OR SOFTENED
15-35
OPTIMAL
WATER, ELECTRODE
CORROSION
> 35
LIMESCALE
LOTS OF LIMESCALE
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Humidifier System
CURRENT
END OF FILL
“NORMAL”
WATER
IN CYLINDER
It = TARGET
START OF FILL
EVAPORATION
CURRENT
EVAPORATION
“HIGH CONDUCT.”
WATER
IN CYLINDER
It = TARGET
START OF FILL
DRAIN
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Humidifier System
AFS ANTI-FOAMING SYSTEM
•
DETECTED BY FOAM SENSORS
•
ELIMINATED BY DRAIN + FILL CYCLES TO
MODIFY WATER COMPOSITION WITH NEW
WATER
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Humidifier System
By Humidifier Macroblock is possible to manage humidifier with immersed electrodes
Steam is produced by boiling the water contained in the cylinder
By Joule effect, the current heats the water to the boiling point
To avoid this, the algorithm executes a repeated
water fill / evaporation cycles
During Evaporation cycle there is steam production and the water
level decreases
The cylinder needs to be continuously filled for maintain a constant
current value
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Humidifier System
HUMIDITY CONTROL
Humidifier
power
100%
ON
Dehumidification
30%
OFF
30% 20%
10%
Humidity
Set
Point
100%
100%
Proportional
band
Proportional
band
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Humidifier System
FIRST STARTING method
At the commissioning of the unit IT IS SUGGESTED TO force the humidifier running
continuously (by altering the standard set point of humidification) so that to keep it
operating until the nominal steam production capacity has been reached. In this way
the maximum performances and the longest durability of the bottle are ensured
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Humidifier System
It is obvious that, if the humidifier is actuated for a very short period, the algorithm is no more
capable to control correctly the salt concentration: when this condition occurs, the solution inside
the bottle can become very aggressive so that causing the corrosion of the electrodes, making
rapidly the bottle to be unusable. This events is generally good visible due to the reddish colour
that appears onto the inside surface of the bottle, that indicates clearly the presence of iron oxide
particles in the composition of the limestone scales. Quite ever this phenomena is signalled by high
current alarm or even by the tripping of the protection, due to the electrical sparks that the
presence of conductive particles can trigger between the electrodes even through the same inside
surfaces of the bottle.
The possible solutions are:
1.to increase the continuous running period of the humidifier. This can be done by acting on the
total steam production capacity, in case of several units fitted, disabling the humidifier an all units
except one (or two in case of stand-by automatic switch-over); or decreasing (in hardware
configuration) the size of the humidifier and/or reducing the maximum steam production.
2.to activate the cyclical dilution enabling the specific option (Timed Drains Enable:Y) and
adjusting, if necessary, the parameters accessible on the specific screen: the proposed values (a
draining of 30 sec every 5 starting of the humidifier) should be enough. Good results were reported
also setting a short dilution (draining of 5-10sec at maximum) at every starting of the humidifier.
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Humidifier System
N.B.: Even if the control algorithm is capable to adequate its behaviour to a wide range of
different characteristics of the feeding water, in some cases the bad performances of the
humidifier can be improved by using a bottle more suitable to the characteristics of the local
water: there are specific bottles for high conductivity water and also specific bottles for low
and very low conductivity water.
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Humidifier System
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Humidifier System
Cylinder maintenance
The life of the cylinder depends on a number of factors, including: the complete
filling with lime scale and/or the partial or complete corrosion of the electrodes, the
correct use and sizing of the humidifier, the output, and the quality of the water, as
well as careful and regular maintenance. Due to the aging of the plastic and the
consumption of the electrodes, even an openable steam cylinder has a limited life,
and it is therefore recommended to replace it after
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Humidifier System
The steam humidifier has only one component which requires a periodical replacement:the steam
production cylinder.
This is necessary where the limestone scales that build up inside the cylinder prevent a sufficient
flow of current.The frequency of this operation depends on the fill water :the higher the content of
salts and impuraties,the more frequent will be the cylinder replacement.
The components to be checked yearly are:
•Fill/drain solenoid valve:remove possible solid scales,without compressed air,and check the proper
operation.
•Hydraulic circuit/fill tank: remove possible scales along the while distance covered by water from
the fill valve to entrance into the cylinder.Afterwards checks that there are no leaks or drips.
•Steam pipe/condensation drainage: Check that from its beginning(the humidifier) to its end
(distributor) in duct or ambient,there are no narrowing,thus preventing the normal output of the
steam/condensation.
•Humidity probe: Check the condition of the probes.Do not use compressed air or solvents to clean
the probe.
It is possible to wash the parts indicates above, whith a commercially available cleaner (normally
ACID ACETIC 20% and water 80%).
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Humidifier System
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Humidifier System
UMAC224X1A cylinder belt locking strap
UMAC223X1A supply tray with conductivity electrodes
UMAC221X1A hum.feed valve kit
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Humidifier System
UMAC222X1A hum.drain valve kit
UMAC225X1A drain joint kit
UMAC226X1A-UMAC227X1A internal pipes jit
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Humidifier System
UMAC020X1A TAM amperometric transformer
TUPL105X1A rubber tube for hydraulic connection
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Humidifier System
UMCV040X1A HUMIDIFIER BOTTLE (for Leonardo
max)
Humidifier bottle
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Humidifier System
TAM and conductimeter connection
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Humidifier System
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Humidifier System
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Humidifier System
ALARM SCREENS
High Current Alarm. This alarm appears when the current flowing in the
humidifier electrodes exceeds the high limit value.
Suggestions/Solutions:
•Check the functionality of the drain valve;
•Check the wet sealing of the fill valve when no energized;
•Then drain some water from the bottle and restart.
Humidifier:
High Current
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Humidifier System
ALARM SCREENS
Power Loss Alarm. When there is the high level signal (bottle full of water)
and in the same time the measured current is around 0 (less than 0,5% of
nominal current). It can happen also in case of saturated bottle (electrodes fully
coated of calcareous scales). Suggestions/Solutions:
•Check for tripping of the protection device;
•Check the wear status of the bottle;
•Check for any leakage of the fill valve;
Check the cleaning of the level electrodes
Humidifier:
Power Loss
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Humidifier System
ALARM SCREENS
Loss of Water Alarm. It appears:
1) During the filling phase:
•when the maximum filling time has passed.
•In case of anomalous value of current that do not correspond to the
normal working of the filling.
2) When in pre-washing cycle:
•During filling phase, if the water level does not reach the high level
electrodes before the maximum time of feeding has passed.
It can be caused also to leakage/malfunction of the drain valve.
Suggestions/Solutions:
•Check that the feeding pipe from water net to the humidifier and the inside
pipes are not obstructed or bended and that there is enough water
pressure (0.1÷0.8 MPa, 18 bar);
•Check the functionality of the fill valve;
•Check for a great head pressure on the steam discharge, so that to inhibit
the normal feeding of water inside the bottle;
•Check that the steam delivery pipe is not obstructed or that there is not a
siphon of condensate;
•verificare che il tubo di mandata del vapore non sia strozzato o che non vi
siano sacche di deposito di condensa;
Check the functionality and the wet sealing of the drain valve
Humidifier:
Loss of Water
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Humidifier System
ALARM SCREENS
Maintenance Requiring Alarm
If a threshold of running hours was set, when this value is reached this alarm is given.
To clear this alarm it is necessary before:
•To increase the threshold value (in case of bottle cleaning), or;
•To reset the running hour counter (in case of bottle replacing).
When resetting the hour counter it is needed to reset also the starting number counter to
maintain the coherence of both values.
Humidifier
Exceeded 01000
Run Hours
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