HygroMatik StandardLine SLH03 User manual

Electric Heater Steam Humidifier
StandardLine
IMPORTANT: READ AND SAVE
THESE INSTRUCTIONS
ÁSLH.ENXÈ
SLH.EN
E-8881160
Manual

Page 2
Risk of electrical shock!
Hazardous electrical 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 [31.01.2019]
SLH 03/06/09/15/25/40/50
All Rights reserved.
Current version of this manual to be found on: www.hygromatik.com
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.
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Page 3
1. Introduction ....................................................................................................................... 6
1.1 Typographic Distinctions ................................................................................................... 6
1.2 Documentation .................................................................................................................. 6
1.3 Symbols in Use ................................................................................................................. 6
1.3.1 Specific Symbols related to Safety Instructions ............................................................. 6
1.3.2 General Symbols ............................................................................................................ 6
1.4 Intended Use ..................................................................................................................... 7
2. Safety Instructions ............................................................................................................ 8
2.1 Guidelines for Safe Operation ........................................................................................... 8
2.1.1 Scope ............................................................................................................................. 8
2.1.2 Unit control ..................................................................................................................... 8
2.1.3 Unit Operation ................................................................................................................ 8
2.1.4 Mounting, dismantling, maintenance and repair of the unit ............................................ 9
2.1.5 Electrical ......................................................................................................................... 9
2.2 Disposal after dismantling ................................................................................................ 9
3. Transport ............................................................................................................................ 10
3.1 Overview ........................................................................................................................... 10
3.2 Packing .............................................................................................................................. 10
3.3 Interim Storage .................................................................................................................. 10
3.4 Check for Complete and Correct Delivery of Goods ......................................................... 10
4. Functional Description and Device Composition .......................................................... 11
4.1 Mode of Action .................................................................................................................. 11
4.2 Operational sequence ....................................................................................................... 12
4.3 Internal Output Setting ...................................................................................................... 12
4.3.1 Continous control ........................................................................................................... 12
4.3.2 Combination of 1-step switching and continous control ................................................. 12
4.4 Mechanical Construction ...................................................................................................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 Water supply ..................................................................................................................... 25

Page 4
6.2 Water discharge ................................................................................................................ 26
6.3 Water connections final check ........................................................................................... 27
7. Electrical connection ........................................................................................................ 28
7.1 Electrical installation approach ..........................................................................................28
7.2 Cable connections ............................................................................................................. 29
7.3 Safety interlock .................................................................................................................. 30
7.4 Control signal .................................................................................................................... 30
7.4.1 1-step operation ............................................................................................................. 30
7.4.2 Operation with an active humidity sensor or external controller ..................................... 30
7.4.3 Wiring for control signal and safety (interlock) system for multiple devices ................... 31
7.5 Connection diagram .......................................................................................................... 31
7.6 Electrical installation check list .......................................................................................... 31
8. Commissioning ................................................................................................................. 32
9. Maintenance ....................................................................................................................... 33
9.1 General .............................................................................................................................. 33
9.1.1 Safety instructions for maintenance ............................................................................... 33
9.2 Maintenance frame work when unit is operated with fully demineralised water and condensate
................................................................................................................................................. 34
9.3 Maintenance when unit is operated with tap water or partially softened water ................ 34
9.4 Removing and cleaning the steam cylinder ....................................................................... 35
9.5 Steam cylinder and cylinder base cleaning ....................................................................... 39
9.6 Level control device cleaning ............................................................................................ 40
9.7 Heater element replacement ............................................................................................. 41
9.8 Thermo switch replacement (for heater elements) ............................................................ 41
9.9 Releasing a thermo switch that has triggered ................................................................... 42
9.10 Inspection of wiring connections and heater element wiring ........................................... 42
9.11 Removal and reinstallation of the solenoid valve including fine filter cleaning ............... 43
9.12 Cleaning of blow-down pump .......................................................................................... 44
9.13 Inspection of hoses ......................................................................................................... 44
9.14 Functional check ............................................................................................................. 44
10. Dismantling ...................................................................................................................... 45
11. Unit Control ...................................................................................................................... 46
11.1 General description ......................................................................................................... 46
11.1.1 Wiring Diagrams ........................................................................................................... 48
11.1.2 Mainboard inputs and outputs ..................................................................................... 52
11.2 Control operation ............................................................................................................. 53
11.2.1 Principal user guidance ................................................................................................53
11.2.2 Menu structure ............................................................................................................. 53
11.2.3 Menu tree ..................................................................................................................... 54
11.3 The control panel ............................................................................................................. 55
11.4 Navigation within a menu ................................................................................................ 56
11.5 Tabular representation of reading value list and provider level submenus ..................... 57
11.5.1 The reading value list ................................................................................................... 57

Page 5
11.5.2 Provider level submenus and relating parameters ....................................................... 58
11.6 Exemplary variation of a parameter setting ..................................................................... 61
11.7 Detailed description of the user level reading values and settings .................................. 62
11.8 Detailed parameter descriptions ...................................................................................... 65
12. Trouble shooting ............................................................................................................. 71
12.1 Error handling .................................................................................................................. 71
12.1.1 Table of possible faults and related error codes .......................................................... 71
12.2 Table of functional disruptions ......................................................................................... 76
13. Declaration of conformity ............................................................................................... 78
14. Spare Parts ...................................................................................................................... 79
15. Technical specifications ................................................................................................. 81
16. Exploded view ................................................................................................................. 84
17. View of housing ............................................................................................................... 85

Page 6
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 mandatory
for the operation of the unit.
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.
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Page 7
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!
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Page 8
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.
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.
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.
Regularly check that all safety and monito-
ring devices are functioning normally. Do not
remove or disable safety devices.
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Page 9
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
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.
Disconnect unit components from electrical
power supply prior to work.
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.
2.2 Disposal after dismantling
The operator is responsible for the disposal
of unit components as required by law.
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Page 10
3. Transport
3.1 Overview
Proceed carefully when transporting the
steam humidifier in order to prevent damage
due to stress or careless loading and unload-
ing.
3.2 Packing
Pay attention to the icons affixed to the pack-
ing box.
3.3 Interim Storage
Store the unit in a dry place and protect from
frost and strong sunlight.
3.4 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.
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Shipping company After receipt of
goods
Carriers no later than 4 days
Parcel service immediately

Page 11
4. Functional Description and
Device Composition
4.1 Mode of Action
The immersion heater principle
Depending on the output rating, up to six
heater elements are arranged within a closed
cylinder. Examplary given, the figure below
shows the heater element and other main
components of the SLH09 steam generator
model.
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 element(s) heats up the cylin-
derwater to approx. 100 °C, transforming the
water into steam with a temperature of
approx. 100 °C and very little positive pres-
sure (so called pressureless steam). 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 mineral deposits will occur. Such, the
number of inspections and/or maintenance
operations required will be reduced to a mini-
mum.
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.
Wastewater outlet
Steam exit
Steam hose adapter
Thermo switch
Steam cylinder
Level control
Control switch
Cable bushing
Blow-down pump
Main contactor
Solid state relay
on heat sink
Connector for
heater element
wiring
Main PCB
(Control)
display
Solenoid valve
Water inlet
Control panel/
Cylinder base
Heater element
Capillary tube
(aligned with
heater element)

Page 12
4.2 Operational sequence
The steam humidifier is switched on by
pressing the control switch on the front panel
to the „I“ position. When a demand for humid-
ification is signalled by a hygrostat, a humid-
ity sensor or an external controller
(depending on the implementation), the inlet
solenoid valve (25)* 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 desain-
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
4.3.1 Continous control
for units with 1...3 heater elements
Continuous control is achieved by propor-
tional driving (pulse width modulation) of the
heater elements. In this way the humidifier
can be proportionally operated across the
entire output range of 5% - 100% of the nomi-
nal capacity.
4.3.2 Combination of 1-step swit-
ching and continous control
for units with 6 heater elements
If the humidifier features more than 3 heater
elements, service provision is accomplished
in 2 steps. As long as a certain threshold is
not reached, the heating power demanded is
delivered exclusively via the solid state relay
and 3 heater elements by using continous
control (stage 1). If the output power demand
exceeds the power available in stage 1, 3
more heater elements are additionally
switched on in a 1-step mode (stage 2). The
power demand beyond what is available in
stage 2 is then covered in stage 1 by the
solid state relay driven in proportional mode.
4.4 Mechanical Construction
The StandardLine heater steam humidifiers
are designed for wall mounting.

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
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Seite 14
5.1.1 Dimensions and Mounting
Directions
Table of dimensions
Model X [mm/inch] Y [mm/inch] Z [mm/inch] A [mm/inch] B[mm/inch]
SLH03-SLH09 350/~13.8 535/~21 245/~9.6 295/~11.6 535/~21
SLH15-SLH25 425/~16.7 695/~27.4 320/~12.6 370/~14.6 695/~27.4
SLH40-SLH50 590/~23.2 790/~31.1 415/~16.3 535/~21 787/~31
Z
X
Y
$
%
<
; =
Detailed easurements under
https://www.hygromatik.com/files/pdf/hygromatik-standardline-dimensionsv11.pdf .
3D models under https://www.hygromatik.com/en/downloads

Seite 15
Wall clearances
When mounting the steam humidifier, the
wall clearances shown in the fig. below must
be obeyed:
Mounting principle
For wall mounting drill measures, please
consult the table above (measure A). 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 sus-
pension 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
To function properly, the steam humidifier
must hang level and plumb.
>500/19.7
>200/7.8
>300/11.8
>50/2.0
device rear
suspension brackets
all measures in mm/inch

Seite 16
Device connections:
cable entries
waste water connection
water inlet
steam outlet
device front

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
t2 in °C (with steam humidifiers the
change in air temperature due to
humidification may be disregarded
t1 or 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 wL in m/s in air duct
•Tot a l le n g t h lD of the steam manifold
installed in the air duct
Length ID of 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
BN using 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
only allows 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