HygroMatik FlexLine Plus User manual

FlexLine Plus
Electric Heater Steam Humidifiers
FLP.CSA
E-8881770
IMPORTANT: READ AND SAVE THESE INSTRUCTIONS
ÁFLP.CSA)È
Manual

Page 2
Risk of electrical shock!
Hazardous electrical high voltage!
All electrical work to be performed by certified expert staff (electricians or expert personnel with
eqivalent training) only.
Certain computer programs contained in this product [or device] were developed by HygroMatik
GmbH ("the Work(s)").
Copyright © HygroMatik GmbH [09.09.2021]
FlexLine FLP 05/08/15/25/30/40/50 CSA
All Rights reserved.
Current version of this manual can be found at: www.hygromatik.co.uk
HygroMatik GmbH grants the legal user of this product [or device] the right to use the Work(s)
solely within the scope of the legitimate operation of the product [or device]. No other right is
granted under this licence. In particular and without prejudice to the generality of the foregoing,
the Work(s) may not be used, sold, licensed, transferred, copied or reproduced in whole or in
part or in any manner or form other than as expressly granted here without the prior written con-
sent of HygroMatik GmbH.
Information in this manual is subject to change or alteration without prior notice.
WARNING
!

Page 3
1. Introduction ....................................................................................................................... 5
1.1 Typographic Distinctions ...................................................................................................5
1.2 Documentation .................................................................................................................. 5
1.3 Symbols in Use ................................................................................................................. 5
1.3.1 Specific Symbols related to Safety Instructions ............................................................. 5
1.3.2 General Symbols ............................................................................................................ 5
1.4 Intended Use ..................................................................................................................... 6
2. Safety Instructions ............................................................................................................ 7
2.1 Guidelines for Safe Operation ........................................................................................... 7
2.1.1 Scope ............................................................................................................................. 7
2.1.2 Unit control ..................................................................................................................... 7
2.1.3 Unit Operation ................................................................................................................ 7
2.1.4 Mounting, dismantling, maintenance and repair of the unit ............................................ 8
2.1.5 Electrical ......................................................................................................................... 8
3. Transport ............................................................................................................................ 9
3.1 Packing .............................................................................................................................. 9
3.2 Interim Storage .................................................................................................................. 9
3.3 Check for Complete and Correct Delivery of Goods ......................................................... 9
4. Functional Description and Device Composition .......................................................... 10
4.1 Mode of Action .................................................................................................................. 10
4.2 Operational sequence .......................................................................................................11
4.3 Internal Output Setting ...................................................................................................... 11
4.4 Mechanical Construction ................................................................................................... 11
4.4.1 FlexLine Plus .................................................................................................................. 11
4.4.2 FlexLine Process ............................................................................................................ 11
4.5 Thermal fuses .................................................................................................................... 12
5. Mechanical installation .....................................................................................................13
5.1 Environment Parameters to be met and Mounting Recommendations ............................. 13
5.1.1 Dimensions and Mounting Directions ............................................................................. 14
5.2 Unit Installation Check ....................................................................................................... 17
5.3 Absorption Distance BN .................................................................................................... 18
5.3.1 Determining the Absorption Distance ............................................................................. 18
5.3.2 Absorption Distance Nomogram .................................................................................... 19
5.4 Steam Manifold ................................................................................................................. 20
5.4.1 General installation guidelines ....................................................................................... 20
5.4.2 Recommendations for dimensioning .............................................................................. 20
5.5 Steam line and condensate hose layout ........................................................................... 23
5.5.1 Guide lines for steam line design .................................................................................. 23
5.5.2 Condensate hose layout ................................................................................................. 23
5.5.3 Steam line and condensate hose installation types ....................................................... 24
6. Water connection .............................................................................................................. 25
6.1 Feed water quality ............................................................................................................. 25
6.2 Operation of electrode steam humidifier with softened water ........................................... 26

Page 4
6.3 Water supply ..................................................................................................................... 26
6.4 Water discharge ................................................................................................................ 27
6.5 Water connections final check ........................................................................................... 28
7. Electrical connection ........................................................................................................ 29
7.1 Electrical installation approach .......................................................................................... 29
7.2 Cable Connections ............................................................................................................ 30
7.3 Connection of interlock (safety) system ............................................................................ 31
7.4 Full wiring diagrams .......................................................................................................... 31
7.5 Electrical installation check list .......................................................................................... 31
8. Commissioning ................................................................................................................. 32
9. Maintenance ....................................................................................................................... 33
9.1 General .............................................................................................................................. 33
9.1.1 Service messages .......................................................................................................... 33
9.1.2 Service messages for preventive maintenance .............................................................. 33
9.1.3 Safety instructions for maintenance ............................................................................... 34
9.2 Maintenance frame work when unit is operated with fully demineralised water and condensate 35
9.3 Maintenance when unit is operated with tap water or partially softened water ................ 35
9.4 Removing and cleaning the steam cylinder ....................................................................... 36
9.4.1 Perform leakage check ................................................................................................... 37
9.5 Cylinder base and strainer cleaning .................................................................................. 37
9.6 Steam cylinder and heater element cleaning .................................................................... 37
9.7 Cleaning Connection Hoses, Cylinder Base Connections, Steam Hose Adapter Nozzle . 38
9.8 Level control device cleaning ............................................................................................ 38
9.9 Cleaning the vent hole on the pipe elbow ......................................................................... 39
9.10 Heater element replacement ........................................................................................... 39
9.11 Releasing the thermical safety devices ........................................................................... 40
9.11.1 Variety of thermal protection devices in use ................................................................. 40
9.11.2 Unlocking of a thermo switch on the cylinder cover ..................................................... 40
9.11.3 Unlocking of the Klixon thermo switch .......................................................................... 40
9.12 Thermo switch replacement (for heater element) ............................................................ 41
9.13 Inspection of wiring connections and heater element wiring ........................................... 42
9.14 Removal and reinstallation of the twin solenoid valve including fine filter cleaning ........ 42
9.15 Removal and reinstallation of the quadruple solenoid valve including fine filter cleaning
(FlexLine Process) .................................................................................................................. 43
9.16 Cleaning of blow-down pump .......................................................................................... 44
9.17 Inspection of hoses ......................................................................................................... 44
9.18 Functional check ............................................................................................................. 44
9.19 Completion of maintenance ............................................................................................. 44
10. Dismantling ...................................................................................................................... 45
11. CSA Certificate of Com-pliance ..................................................................................... 46
12. Spare Parts ...................................................................................................................... 49
13. Technical specifications ................................................................................................. 52
14. Exploded view ................................................................................................................. 54
15. View of housing ............................................................................................................... 55

Page 5
1. Introduction
Dear Customer,
Thank you for choosing a HygroMatik steam
humidifier.
HygroMatik steam humidifiers represent the
latest in humidification technology.
In order to operate your HygroMatik steam
humidifier safely, properly and efficiently,
please read these operating instructions.
Employ your steam humidifier only in sound
condition and as directed. Consider potential
hazards and safety issues and follow all the
recommendations in these instructions.
If you have additional questions, please con-
tact your expert dealer.
For all technical questions or spare parts
orders, please be prepared to provide unit
type and serial number (see name plate on
the unit).
1.1 Typographic Distinctions
•preceded by a bullet: general speci-
fications
» preceded by an arrow: Procedures
for servicing or maintenance which
should or must be performed in the
indicated order
Installation step which must be
checked off.
italics Terms used with graphics or draw-
ings
1.2 Documentation
In addition to this manual, the appropriate
FlexLine Control documentation is manda-
tory for the operation of the unit. This is not
applicable to StandardLine devices, here the
documentation of the controller is included in
the operation manual.
Retention
Please retain these operating instructions in
a secure, always accessible location. If the
product is resold, turn the documentation
over to the new operator. If the documenta-
tion is lost, please contact HygroMatik.
Versions in Other Languages
These operating instructions are available in
several languages. If interested, please con-
tact HygroMatik or your HygroMatik dealer.
1.3 Symbols in Use
1.3.1 Specific Symbols related to
Safety Instructions
According to EN 82079-1 (and ANSI Z535.6),
the following signal words are used within
this document:
DANGER indicates a hazardous situation
which, if not avoided, will result in death or
serious injury.
WARNING indicates a hazardous situation
which, if not avoided, could result in death or
serious injury.
CAUTION indicates a hazardous situation
which, if not avoided, could result in minor or
moderate injury.
NOTICE is used to address practices not
related to physical injury.
1.3.2 General Symbols
This symbol is used whenever a situation
requires special attention beyond the scope
of safety instructions.
Please note
DANGER
!
WARNING
!
CAUTION
!
NOTICE
Please note

Page 6
1.4 Intended Use
HygroMatik electric heater steam humidifiers
serve for steam production based on tap
water, partially softened water or fully desali-
nated water/cleaned condensate.
Proper usage also comprises the adherence
to the conditions specified by HygroMatik for:
• installation
• dismantling
• reassembly
• commissioning
• operation
• maintenance
• disposal.
Only qualified personnel may operate the
unit. Persons transporting or working on the
unit must have read and understood the cor-
responding parts of the Operation and Main-
tenance Instructions and especially the
chapter 2. „Safety Notes“.
Additionally, operating personnel must be
informed of any possible dangers by the pro-
vider. A copy of this manual is to be placed at
the unit‘s operational location.
By construction, HygroMatik steam humi-
difiers are not qualified for exterior appli-
cation.
Risk of scalding!
Steam with a temperature of up to 100 °C
(212 °F) is produced.
Do not inhalate steam directly!
WARNING
!

Page 7
2. Safety Instructions
These safety instructions are required by law.
They promote workplace safety and accident
prevention.
2.1 Guidelines for Safe Opera-
tion
2.1.1 Scope
Comply with the accident prevention regula-
tion „DGUV Regulation 3“ to prevent injury to
yourself and others. Beyond that, national
regulations apply without restrictions. This
way you can protect yourself and others from
harm.
2.1.2 Unit control
Do not perform any work which compromises
the safety of the unit. Obey all safety instruc-
tions and warnings present on the unit.
In case of a malfunction or electrical power
disruption, switch off the unit immediately and
prevent a restart. Repair malfunctions
promptly.
Restricted use.
IEC 60335-1 stipulates as follows:
This device may be used by children of eight
years of age and above as well as by persons
with reduced physical, sensory or mental ca-
pabilities or lack of experience and knowledge
so long as they are supervised or have been
instructed regarding the safe use of the de-
vice and understand the hazards that may re-
sult from it. Cleaning and user maintenance of
the unit must not be undertaken by children
without supervision.
2.1.3 Unit Operation
Risk of scalding!
Uncontrolled hot steam escape in case of
leaking or defective components possible.
Switch off unit immediately.
For Ministeam devices applies:
Risk of scalding!
No persons may be under the cloud of steam
blowing out (at a distance of approx. 1 m/40
inch in the direction of blowing out and 0.5 m/
20 inch on both sides of the device).
Risk of material damage!
• The unit may be damaged if switched
on repeatedly following a malfunction
without prior repair. Rectify defects
immediately!
• The unit must not be operated on a DC
power supply.
• The unit may only be used connected
to a steam pipe that safely transports
the steam (not valid for MiniSteam
units).
• Regularly check that all safety and
monito-ring devices are functioning
normally. Do not remove or disable
safety devices.
• Steam operation is only allowed when
the unit cover is closed.
Water leaks caused by defective connec-
tions or malfunctions are possible.
Water is constantly and automatically filled
and drained in the humidifier. Connections
and water-carrying components must be
checked regularly for correct operation.
WARNING
!
WARNING
!
WARNING
!
NOTICE
NOTICE

Page 8
2.1.4 Mounting, dismantling, mainte-
nance and repair of the unit
The HygroMatik steam humidifier is IP20 pro-
tected. Make sure that the unit is not object to
dripping water in the mounting location.
Installing a humidifier in a room without water
discharge requires safety devices to protect
against water leakages.
• Use genuine spare parts only
• After any repair work, have qualified
personnel check the safe operation of
the unit
• Attaching or installing of additional
components is permitted only with the
written consent of the manufacturer
Do not install HygroMatik steam generators
above electrical equipment such as fuse
boxes, electrical appliances, etc. In the case
of a leakage, leaking water can damage the
underlying electrical equipment
2.1.5 Electrical
Risk of electrical shock!
Hazardous electrical voltage!
Any work on the electrical system to be per-
formed by certified expert staff (electricians
or expert personnel with comparable training)
only.
Steam operation may only be started when
the unit cover is closed.
During maintenance or installation work, the
device must be disconnected from the power
supply and secured against being switched
on again. The absence of voltage must be
ensured by a measurement.
Leaks can cause leakage currents. Observe
safety regulations on working with voltage
parts (applies to electrode steam humidifi
es).
After electrical installation or repair work, test
all safety mechanisms (such as grounding
resistance).
Use only original fuses with the appropriate
amperage rating.
Regularly check the unit‘s electrical equip-
ment. Promptly repair any damage such as
loose connections or burned wiring.
Responsibility for intrinsically safe installation
of the HygroMatik steam humidifiers is
incumbent on the installing specialist com-
pany.
NOTICE
NOTICE
WARNING
!
NOTICE

Page 9
3. Transport
Proceed carefully when transporting the
steam humidifier in order to prevent damage
due to stress or careless loading and unload-
ing.
3.1 Packing
Pay attention to the icons affixed to the pack-
ing box.
3.2 Interim Storage
Store the unit in a dry place and protect from
frost and strong sunlight.
3.3 Check for Complete and Cor-
rect Delivery of Goods
Upon receipt of the unit, confirm that:
•model and serial number on the
name plate match those specified in
the order and delivery documents
•the equipment is complete and all
parts are in perfect condition
In case of damage from shipment and/or
missing parts, immediately notify the carrier
or supplier in writing.
Time limits for filing freight claims with ship-
ping companies are*:
* Time limits for some services subject to
change.
Please note
Please note
Please note
Shipping company After receipt of
goods
Carriers no later than 4 days
Parcel service immediately

Page 10
4. Functional Description and
Device Composition
4.1 Mode of Action
The immersion heater principle
Depending on the output rating, one, three or
six heater elements are arranged within a
closed cylinder. Examplary given, the figure
below shows the heater elements and other
main components of a heater element steam
generator of the FLP series with 6 heater ele-
ments.
The cylinder(s) are filled with either tap water
of varying quality, fully desalinated water or
partially softened water.
The heat introduced by the heater elements
heats up the cylinderwater to approx. 100 °C
(212 °F), transforming the water into steam
with a temperature of approx. 100 °C (212 °F)
This steam is virtually mineral-free and germ-
free.
When fully desalinated water is used, the cy-
linder water is almost totally clear of minerals.
This situation guarantees a long lifetime of the
cylinder(s) and the heater element(s), since
virtually no hardeners will fall-out and no min-
eral deposits will occur. Such, the number of
inspections and/or maintenance operations
required will be reduced to a minimum.
When tap water is used for operation, some of
the minerals dissolved in the water are likely to
settle in the cylinder in form of solids of various
compositions. However, most of the solids are
flushed out by cyclic blow-down with the help
of a heavy-duty blow-down pump.
Control switch
Display
Main contactor
Blow-down
pump
Cable bushings
Waste water
outlet
Mainboard
(control)
Connector for heater
element wiring
Solid state relay
on heatsink
Water inlet
Solenoid valve
Cylinder base
Heater elements
Steam cylinder
Steam hose
adapter
Steam exit
Thermo switch
Level control

Page 11
4.2 Operational sequence
The steam humidifier is switched on by
pressing the control switch on the front panel
to the „I“ position. If the safety chain is
closed, the inlet multiple solenoid valve (twin
solenoid valve (25)*) in case of FLPxx-T and
FLPxx-TSPA units, 4-fold solenoid valve
(71)*) with FLPxx-TPRO units)*opens and
water is fed into the steam cylinder.
Filling level in the cylinder is controlled by a
level control device (27)*). In a plastic cylin-
der, connected to the steam cylinder via
hoses in the way communicating tubes are
connected, a sensor for continous propor-
tional water level survey is located.
The cylinder water is periodically blown
down. For usage of the unit with fully deselin-
ated water, the blow-down function may be
blocked.
Water blow-down is achieved by means of
the blow-down pump (32)*) that is continously
monitored during unit operation. In case of
pump disruption, the HygroMatik steam
humidifier is shut off.
With normal water quality, blow-down loss is
in the range of 7 to 15% of the steam amount
produced. Depending on water quality, a full
steam cylinder blow-down is run every 3 to 8
days.
Mineral deposits settle in the open area
below the heater element(s) and are
removed through periodic maintenance. The
blow-down pump itself has wide openings
and can flush out smaller pieces of mineral
deposit. This extends the service life of the
unit and reduces the required maintenance
interval.
On blow-down, water flows from the pump
into the drain hose system.
For maintainence purposes, the cylinder
water may be pumped out by pressing and
holding the control switch in the „II“ position.
*) numbers indicated correspond with those in
the exploded view in the „Exploded view“
chapter.
4.3 Internal Output Setting
Continuous control is achieved by propor-
tional driving (pulse width modulation) of the
heater elements via one or both solid state
relays. In this way the humidifier can be pro-
portionally operated across the entire output
range of 5% - 100% of the nominal capacity.
A power setting of 0% to 5% of the nominal
output is possible, but not technically feasible
due to condensate losses in the steam line.
If the unit is equipped with more than 3
heater elements, the output power provision
is accomplished in 2 stages. As long as a
certain threshold was not reached, the heat-
ing power necessary is solely controlled via
the solid state relays and the 3 heater ele-
ments in a propotional manner (stage 1). If
the output power requested lies beyond what
is available in stage 1, three additional heater
elements are activated via a main contactor
in a one-step operation mode (stage 2). Any
power requirement in excess of the stage 2
rating is then proportionally supplied via the
solid state relays by the stage 1 operational
mode.
4.4 Mechanical Construction
The type of housing is designed for wall
mounting. The steam cylinder is made from
stainless steel. Depending on the power out-
put range, one, three or six heater elements
are encorporated.
4.4.1 FlexLine Plus
Freshwater supply is accomplished by
means of a twin solenoid valve that is also
used for the SuperFlush functionality.
4.4.2 FlexLine Process
The units featuring the TPRO-control allow
the exceedingly precise steam control via a
fourfold solenoid valve. For this to work, the
use of fully demineralized water is manda-
tory.

Page 12
4.5 Thermal fuses
The devices of the FLP series have several
thermal fuses which are electrically con-
nected in series. After one of the fuses has
tripped, the device switches to the fault sta-
tus. A device restart is required but is possi-
ble only if the relevant thermal switches have
cooled down or the thermal sensors have
been unlocked.
The following fuses are available:
on the cylinder cover
• 1 thermal switch (Klixon) to protect
against overheating of the steam cylin-
der; the switch has a pin for manual
reset after cooling down
• 1 or 2 (for devices with six radiators)
thermal sensors with capillary tube for
direct thermal monitoring of the radia-
tors. One capillary tube each is con-
nected to 1 to 3 radiators (depending
on the device type). After a thermal
sensor has been triggered, it must be
reset manually (see maintenance
description)
on solid state relays
The solid state relay (or two solid state relays
on devices with higher power) is (are) ther-
mally protected by a bimetal switch. The
bimetal switch returns to its initial position
during the cooling process.

Page 13
5. Mechanical installation
Risk of foot injuries!
Prevent unit from dropping during installation!
Helping hand of a second person is advis-
able.
Risk of electrical shock!
Hazardous electrical voltage.
During installation, the unit must be discon-
nected from power supply.
5.1 Environment Parameters to
be met and Mounting Recom-
mendations
When selecting the installation site for the
steam humidifier, take the following into
account:
• The minimum clearances indicated in
the fitting measures section must be
observed in order to ensure adequate
unit ventilation and allow for unobstruc-
ted access in case of maintenance
• Protection class IP20
• By design, HygroMatik steam humidi-
fiers are not qualified for outdoor instal-
lation (electronical components and
water-bearing parts may be damaged)
• Ambient temperature must lie between
+5 and +40 °C (+41 and +104 °F) in
order to protect the unit electronics
against damage; frost may damage the
steam cylinder, the solenoid valve and
pump, as well as make hoses burst
• Relative humidity must not exceed
80 % r.h., since values beyond may
lead to electronic malfunction or dam-
age
• Installation in a closed room requires
aeration and, eventually, temperature
conditioning in order to meet the a.m.
environmental conditions
• The steam humidifier should be
installed as close as possible to the
steam manifold. Optimum perfor-
mance is only guaranteed when steam
and condensate hoses are kept short
• Make use of existing water connections
for supply and draining
• Hoses must be laid at a consistent 5 to
10 % incline/decline; sagging and kin-
king prevention is a must
• Mount the unit on a stable, preferably
solid wall offering the bearing capacity
required (s. unit technical specificati-
ons). If such a wall is not at hand, the
unit may be attached to a stand bracket
firmly bolted to the floor
• For proper functioning of the level con-
trol, plumb and level installation of the
unit is required
• The steam humidifier rear panel heats
up during operation to a maximum of
70 °C (158 °F). Take care that the con-
struction on which the unit is to be
mounted is not made of temperature-
sensitive material
WARNING
!
WARNING
!

Page 14
5.1.1 Dimensions and Mounting
Directions
1 bottom view
2 side view
3 front view
4 back view
5 top view
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Page 15
Mounting principle For wall mounting drill measures, please
consult the table above (measure A and B).
In case of no suitable wall available for
mounting the unit, it is recommended that
installation is made on brackets firmly
anchored in the floor.
» mark the holes for the upper
suspension brackets screws
» drill holes and dowel
» screw in the supplied mounting
screws; let the screws protrude
approx. 12 mm/.5 inch from wall
» ensure firm fixation and load-carry-
ing capacity of the mounted screws!
» hook in the unit and ensure safe
suspension
» mark the holes for the lower suspen-
sion brackets screws
» remove the unit
» drill holes and dowel
» hook in the unit and mount the lower
screws firmly
Wall clearances
When mounting the steam
humidifier, the wall clearanc-
es shown in the fig. below
must be obeyed::
* distance to designated paths
A 5 cm / 2,0 inch
B 50 cm / 19,7 inch
C 20 cm / 7,8 inch
D 60 cm / 23,6 inch
E 30 cm / 11,8 inch
A
B
C
D
E
Y
X
Z
*
device rear
suspension
brackets

Page 16
• To function properly, the steam humidi-
fier must hang level and plumb.
• When choosing the installation loca-
tion, consider the necessary distance
between the unit and existing designa-
ted paths. This should be at least 60
cm.
• The mounting wall must be made of a
temperature-resistant material, as the
enclosure can heat up to 70°C.
Device connections:
Please note
Cable entries
1¼“ Waste water connection
¾“ Water inlet
DN25, DN40 Steam outlet

Page 17
5.2 Unit Installation Check
Before start-up, pls. check proper unit instal-
lation following the list below:
Unit perpendicularly aligned in both
the vertical and horizontal axis ?
All clearances obeyed?
Steam hose installed with a 5 - 10 %
minimum incline/decline (see chap-
ter "Steam line“) ?
Condensate hose features a loop
functioning as a steam barrier (see
chapter „Condensate hose“) ?
Steam manifold(s) properly positio-
ned?
All bolts and clamps properly tighte-
ned?
Steam manifold(s) horizontally mon-
ted and suspended on the free end,
if required ?
All seals (o-rings) in place?
All ventilation slots on housing top
unobscured?

Page 18
5.3 Absorption Distance BN
The "absorption distance" (BN)is defined as
the distance from the steam feed to where
the steam is completely absorbed in the
treated air. Within the absorption distance,
steam is visible as mist in the air stream.
Condensation may occur on anything
installed within the absorption distance.
Although steam outside the absorption dis-
tance (BN) is completely absorbed, it is not
yet evenly diffused in the duct. If you plan to
install any parts or devices inside the absorp-
tion distance, such as sensors or elbows, we
recommend increasing the absorption dis-
tance using the formulae below. The absorp-
tion distances required for certain installed
fittings are distinguished by separate sym-
bols and calculated as a multiplier of the
absorption distance BN.
The absorption distance has no fixed value,
but depends on many factors. These are
depicted in the absorption distance nomo-
gram below.
5.3.1 Determining the Absorption
Distance
To determine the absorption distance, the fol-
lowing parameters are required:
•Air humidity before humidification x1
in g/kg
•Air temperature after humidification
t2in °C (with steam humidifiers the
change in air temperature due to
humidification may be disregarded
t1or t2)
•Specific increase in humidity x in
g/kg (can be determined in the h,x
diagram)
•quantity of steam introduced in
kg/h.
•air speed wLin m/s in air duct
•Total length lD of the steam manifold
installed in the air duct
Length IDof the usable steam manifold
depends on the dimensions of the air duct.
The length of the absorption distance can be
reduced by using multiple steam manifolds
(also see section on the steam manifold).
Method:
Graphically determine absorption distance
BNusing the absorption distance nomogram
(also see Section „Absorption Distance
Nomogramm“). Enter the value of the param-
eters enumerated above into the respective
quadrants. The resulting point of intersection
indicates the value of the desired absorption
distance BN.
Notes:
Air humidity before humidification x1:....[g/kg]
Air temperature after humidification t2:.....[°C]
Specific increase in humidity x:...........[g/kg]
Quantity of steam introduced :.........[kg/h]
Air speed WL:..........................................[m/s]
Total length of steam manifold lD:...........[mm]
o
D
m
o
D
m
Absorption Distance
BNfor normal obstructions
such as sensors, ventila-
tors, outlets
Bc= (1.5...2) x BNfor fine fiters, heat regis-
ters
Bs= (2.5...3) x BNfor particle filters
Bd= (3...5) x BNfor humidity sensors,
duct humidistats

Page 19
5.3.2 Absorption Distance Nomogram
Source: Henne, Erich: Luftbefeuchtung (Air Humidification), 3rd Edition 1984 (Page 101), Olden-
bourg Industrieverlag, Munich

Page 20
5.4 Steam Manifold
5.4.1 General installation guidelines
When installing steam manifolds, pls. follow
these guidelines:
Positioning within duct
• Install the steam manifold as close as
possible to the steam humidifier in
order to minimize steam loss through
condensation
• Steam manifold placement on the sup-
ply side of the air duct is preferable
• Install steam manifold strictly horizontal
in order to ensure proper condensate
drain
• Shown installation and positioning
dimensions are based on empiric
values. Special environmental conditi-
ons may require adjustments. Pay
special attention to avoid condensate
generation in air duct
Allowable pressures
• Max. allowable pressure in air duct is
1500 Pa/.218 PSI (exemption: SLE02,
SLH02, KIT E02 and KIT H02 only
allow for 1200 Pa/.174 PSI)
• On suction side, max. -500 Pa (.07
PSI) is tolerable
• With high-pressure air conditioning
systems, modifications of the unit‘s
drain hose system may possibly be
required depending on the overall pres-
sure situation. These modifications
must be coordinated with your
expert dealer.
Water drain
• We point out that according to the Ger-
man Association of engineers (VDI)
guideline VDI 6022, a water drain must
be provided within the absorption
distance inside the air duct
When increased airflow speed is encoun-
tered
• Air flow rates beyond 3m/s (9.84 ft/s)
may lead to condensate drainage prob-
lems at the steam manifolds due to
vacuum built-up. A possible remedy is
twisting the steam manifold in its hori-
zontal axis by few angular degrees. In
case of problems, pls. consult your
expert dealer.
5.4.2 Recommendations for dimen-
sioning
The recommendations given below are
based on homogenous air flow in the duct.
Horizontal installation of steam manifold
Standard steam manifold arrangement:
An even distribution of steam manifolds ensu-
res a uniform steam distribution.
Please use the
total hight of the
duct!
L1=L2=L3
Air flow
direction
Steam manifold
(Side view)
Air duct
*) s. table of manifold lengths Horizontal assembly position in duct
l*) (depends on duct dimension)
4.7 inch 3.5 inch 2.8 inch
120 mm 90 mm 70 mm
1.5 mm
.06 inch