HygroMatik DDS Series User manual

Steam Injection Humidifiers DDS
for existing steam nets
ÁDDS.CSAßÈ
DDS.CSA
Manual

Page 2
Risk of electrical shock by hazardous voltage!
All work to be performed by trained personnel only.
All electrical installation and servicing of the electrical components of this unit to be performed by
qualified electricians only.
Disconnect power supply before installation and servicing!
©Copyright HYGROMATIK GmbH
CSA DDS 01.08.2016
Information in this manual is subject to change or alteration without prior notice.
Current version of this manual can be found at: www.hygromatik.co.uk

Page 3
1. Introduction ....................................................................................................................... 5
1.1 Directions for Use .............................................................................................................. 5
1.2 Typographic Distinctions ...................................................................................................5
2. Safety Instructions ............................................................................................................ 7
2.1 Overview ........................................................................................................................... 7
2.2 Guideline for Safe operation .............................................................................................. 7
2.3 Disposal after dismantling .................................................................................................8
3. Transport ............................................................................................................................ 9
3.1 Packing .............................................................................................................................. 9
3.2 Temporary storage ............................................................................................................ 9
3.3 Checking for correct and complete delivery ...................................................................... 9
4. Function and Assembly .................................................................................................... 10
4.1 Function ............................................................................................................................. 10
5. Strainer ............................................................................................................................... 11
5.1 Technical Data .................................................................................................................. 11
6. Separator ........................................................................................................................... 12
6.1 Function ............................................................................................................................. 12
6.2 Technical Data .................................................................................................................. 12
7. Control Valve and Actuator .............................................................................................. 13
7.1 Control Valve ..................................................................................................................... 13
7.2 Actuator ............................................................................................................................. 14
8. Start-up safety switch ....................................................................................................... 15
9. Steam Lances .................................................................................................................... 16
9.1 Technical Data ................................................................................................................. 17
9.2 Number of steam lances ................................................................................................... 18
10. Pressure Gauge Station .................................................................................................. 19
11. Ball Float Steam Trap .....................................................................................................20
11.1 Function ........................................................................................................................... 20
11.2 Technical Data ................................................................................................................ 21
11.2.1 KS-Condensate Drain for DDS Type A ....................................................................... 21
11.2.2 KS-Condensate Drain for DDS Type C ........................................................................ 21
12. Thermostatic Capsule Steam Trap ................................................................................ 22
12.1 Function ........................................................................................................................... 22
12.2 Technical Data ................................................................................................................ 23
13. Humidification Output ..................................................................................................... 24
13.1 Output Graphs ................................................................................................................. 24
13.2 Determining the control valve Kvs-Value ....................................................................... 24
13.3 Separator Model 20 with one steam lance ..................................................................... 26
13.4 Separator Model 20 with multiple steam lances ............................................................. 27
13.5 Separator Model 40 with one steam lance ..................................................................... 28
13.6 Separator Model 40 with multiple steam lances ............................................................ 29
14. Graph for Determing Absorption Distance ................................................................... 30

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15. Installation ....................................................................................................................... 31
15.1 Attaching steam pipes .....................................................................................................31
15.2 Water hammer prevention ............................................................................................... 32
15.3 Electrical Installation ........................................................................................................ 33
15.4 Separator ......................................................................................................................... 34
15.5 Control Valve and Actuator ............................................................................................. 34
15.6 Pneumatic start-up protection ......................................................................................... 35
15.7 Steam Lances ................................................................................................................ 36
15.8 Installation Examples ...................................................................................................... 39
15.9 Steam Lance Heating System ......................................................................................... 41
15.10 Allowable environmental parameters ............................................................................ 42
15.11 Check List ...................................................................................................................... 42
16. Initial Operation ............................................................................................................... 43
17. Maintenance ..................................................................................................................... 45
17.1 Maintenance work ........................................................................................................... 45
17.2 Strainer ............................................................................................................................ 45
17.3 Ball float condensate drain .............................................................................................. 46
17.4 Thermostatic Capsule Steam trap type MST21 ............................................................ 48
18. Malfunctions .................................................................................................................... 49
19. Dismantling ...................................................................................................................... 51
20. Steam Injection System dimensions and Installation Schematic ............................... 52
21. Spare Parts ...................................................................................................................... 53
22. Fax Form - Order for spare parts ................................................................................... 55

Page 5
1. Introduction
Dear Customer,
HygroMatik steam Injection humidifiers, produce dry steam for
humidification in A/C ducting and other applications.
Your steam injection humidifier comprises steam separators,
steam lances, steam trap, control valve and actuator. It is
extremely economical, safe in operation and easy to use.
In order to operate the HygroMatik steam injection humidifier in
a safe, orderly and economical fashion please take the time to
read this operating manual.
Please use the steam injection humidifier in a proper condition,
use only as it is intended and with regard to all the safety and
hazard indications and notes in this manual.
If you have any queries at all please get in touch as follows:
Tel.: [phone] (Switchboard)
Tel.: [phone] (Technical Hotline)
Fax: [phone]
E-Mail: [email protected]e
1.1 Directions for Use
Your HygroMatik steam injection humidifier makes use of exis-
ting live steam for humidification purposes.
Hot Steam!
Do not inhalate!
HygroMatik steam humidifiers emit steam with a temperature of
more than 212°F (100° C). The steam should not be inhaled
directly.
Proper usage involves strict adherence to our installation, de-
and re-installation, commissioning, operation and maintenance
requirements as well as proper disposal procedures.
Only qualified and authorised personnel may operate or service
the unit. Persons having to do with transport or any work on and
with the unit must previously have read and understood the rele-
vant parts of the manual, especially the section on safety
requirements. Additionally, the operator must inform such per-
sonnel about any possible hazards. Please place an example of
the operating instructionsl, clearly visible, at or near the installed
unit.
1.2 Typographic Distinctions
•preceded by a bullet: general specifications.
» preceded by an arrow: Procedures for servicing or
maintenance which should or must be performed in the
indicated order.

Page 6
Installation step which must be checked off.

Page 7
2. Safety Instructions
2.1 Overview
These safety instructions are required by law. They promote
workplace safety and accident prevention. According to ANSI
Z535.6 the follwowing signal words are used in 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.
2.2 Guideline for Safe operation
Restricted Use
This unit is not designed for the use by persons (also children)
with limited physical, sensory and mental abilities - or without
knowledge and experience. Unless they are supervised or trai-
ned by a person, who is responsible for their safety.
Supervise children in order to ensure that they will not play with
the unit.
Accident prevention compliance
Please comply with accident prevention laws:
See UVV Electical Appliances and associated units (VBG 4).
This can prevent injury to yourself and others.
Operational Safety
In the case of malfunction shut off steam supply and make sure
it cannot be opened by unauthorised personnel. Correct mal-
functions immediately.
National laws also fully apply to the use of this steam injection
humidifier.
Operating the Steam Injection Humidifier
Please do not do any work in such a way as to endanger the
safe operation of the unit.
Check all safety and monitoring elements regularly for correct
functioning.
Do not remove, disable or de-install any safety-relevant items.

Page 8
Installation, dismantling, servicing and repair
Steam injection humidifier parts on which maintenance or repair
work is to be done must be disconnected from voltage and the
steam supply shut off. Installation of any additional parts is
allowed only after written permission from the manufacturer.
After repair, operational safety must be checked out by autho-
rised personnel. Use only original spare parts.
Electrical
Only qualified electricians may carry out electrical work on the
unit. Remove voltage from any components being worked on. If
the energy supply is malfunctioning, switch off the unit immedi-
ately. After electrical work or repair is carried out all safety ele-
ments must be tested for proper functioning.
Operating environment
Use only steam without chemical additives.
Use only steam with a minimum pressure of 0.5 bar and a max-
imum pressure of 4 bar at the entry point of the steam injection
humidifier.
Steam supply must be dimensioned so that the steam velocity
does not exceed 27 yd 1 ft/s (25 m/s).
There may be impurities in the steam supply. In order to prevent
valve damage there must be a filter installed with a pore diame-
ter of 0.006 in (0.16 mm) or less.
The control valves are not stop valves. They have been opti-
mised to control the necessary steam supply. They are metal to
metal sealed according to IEC 534-4 Class IV and can, there-
fore, show a leakage of 0.01 % when supplied. We recommend
the use of a stop valve in order to ensure that the steam supply
is completely shut off.
In order to maintain a continuous and constant humidification the
humidity sensors should not be fitted in the supply duct.
Risk of skin burning!
Steam pipes are hot.
Do not touch. Take care when in close proximity.
2.3 Disposal after dismantling
The operator is responsible for the lawful disposal of the steam-
injection humidifier components.

Page 9
3. Transport
Overview
Proceed carefully when transporting the steam injection humidi-
fier in order to prevent damage due to stress or careless loadig
and unloading.
3.1 Packing
Notice the symbols afixed to the box(es).
The kind of packing used is dependent upon the type of unit sup-
plied.
Accessories, such as steam traps, that can be part of the com-
plete order, are packed separately.
If the control valve is part of the delivery it will be delivered
already installed on the steam separator. Additional screw fit-
tings are packaged separately.
Steam lances are delivered in special protective wrappings.
3.2 Temporary storage
Risk of material damage due to improper storage!
Store steam injection humidifier in a dry and frost free area only.
3.3 Checking for correct and complete delivery
Upon receipt of the goods, confirm that:
• the delivery corresponds to the order and delivery note
• The data on the manufacturer‘s name plate corresponds to
the order and supply note
• All delivered components are in perfect condition
In case of damage during shipment or missing parts, immedi-
ately file a written claim with your carriere or supplier.
Time limits for filing freight claims with shipping companies are*:
* Time limits for some services subject to change.
Transport company After receipt of goods
Carriers no later than 4 days
Parcel service immediately
Please note
Please note
Please note

Page 10
4. Function and Assembly
The HygroMatik Steam Injection Humidifier comprises 4 basic
elements:
• Separator
• Control valve with or without control operation
• Steam Lances
• Additional materials
There is a stainless steel version Type A
and a mixed material version Type C
4.1 Function
Steam flows through a dirt particle trap (1) over the Separator
interface (2) into the Separator (3). The separator separates
condensation from the steam.
Condensation is drained using the float controlled condensa-
tion drainage. The Start-up safety feature (5) measures the
temperature at the condensation return. Operation switch (11)
is activated when the switch temperature has reached approx.
176° F (80° C).
Now the main portion of the steam flows through the control
valve (7). The amount of steam is regulated over the operation
switch (11).
Steam lances (n) (8) are flanged or screwed onto the valve exit
side.
Dried steam is blown out through the specially formed nozzles
(9) that take the dried steam from the pipe centre. The nozzles
are press-fitted into the steam lances.
The steam lance heating system is fed over connection (6) on
the separator. Alternatively there is the possibility to seal the
separator connection and operate the steam lance heating sys-
tem from a separate steam reservoir. A thermic Capsule Con-
densation Drain (10) ensures that condensation in the steam
lance heating system is drained off.
HygroMatik DDS Type A
*all stainless steel contruction
HygroMatik DDS Type C
*dirt trap, KS-Condensation drain and Valve as castings

Page 11
5. Strainer
There should be a strainer installed in the steam supply line
directly in front of every separator. Only if this is done there is
guarantee that no foreign particles enter the humidifier unit.
Valve cone and valve face in both the control valve and steam
trap are sensitive to fouling. Dirt particles between the face and
the cone prevent normal closure and have a corrosive effect. .
Function
Steam flows through the inlet in the cylindrical version (type C)
or the conical strainer (type A) and through the holes to the exit.
Foreign matter is retained by the strainer.
5.1 Technical Data
Strainer type A
*installed in the entry flange
Strainer type C
*Principle only; delivery in screwed
version
Strainer 12.1 for type C Model 20 Model 40
Nominal pressure setting PN 25
Female thread 3/4“ 1 1/2“
Weight 1 lb 5.2 oz/0.60 kg 5 lb 4.7 oz/2.4 kg
Dimensions A
B
C
D
3.7 in/93mm
2.6 in/65mm
4.3 in/110mm
1.5 in/38mm
6 in/153mm
4.5 in/115mm
7.5in/190mm
2.4 in/62mm
Materials
Housing
Filter fitting
Seal
Coarse strainer
GGG40
GGG40
Graphite, reinforced with nickel
Stainless steel 316L
pore size, coarse strainer 0.006 in/0.16mm

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6. Separator
The stainless steel separator is the essential component for
moisture separation. The separator is available as models „20“
and „40“. The separator size is dependent upon the desired
steam output and available steam pressure.
6.1 Function
Steam flows through the pipe union (1) into the separator.
Steam and condensate are separated by the joint action of the
inlet pipe (2) and the spiral-shaped flow system.
The aerosole droplets present in the steam are thrown against
the outer wall by centrifugal force which separates them from the
steam phase. The droplets are conveyed through the drain (3)
into the condensate return. This prevents droplets from being
transported by the steam.
Steam is conveyed into the upper part of the separator chamber
via a supply pipe (4) or directly to the valve.
A certain amount of steam flows through the connector (5) and
feeds the steam lance heating system.
The bulk of the steam exits the separator through the outlet
connection (6) and flows through the control valve.
6.2 Technical Data
Separator Type A
Separator Type C
Separator DDS20 DDS40
Type A Type C Type A Type C
Thread
connections
B
C
D
1/4“
1/2“
DN25
1/4“
1/2“
3/4“
1/4“
1/2“
DN40
1/4"
1"
1 1/2"
Weight 7 lb 15 oz/
3.6 kg
3 lb 3.5 oz/
1.46 kg
16 lb 1.5 oz/
7.3 kg
8 lb 2.5 oz/
3.7 kg
Dimensions
[in/mm]
c
d
e
f
1.78/45
-
9.25/235
3.5/89
2.44/62
1.7/43
8.2/208
4.1/105
2.36/60
-
13.4/340
4.8/122
3.1/79
2.75/70
12.4/316
6.0/152
Materials
housing
internal
CrNiMo
Steel
1.4301
1.4301
VA
CrNiMo
Steel
1.4301
1.4301
VA
Max.
Humidifica-
tion output
[lb/h]/[kg/h]
595/270 397/180 1697/770 1609/730
Steam
Pressure
[bar]
max. 4

Page 13
7. Control Valve and Actuator
The amount of steam desired is set by means of a control valve
located between separator and steam lance. The control valve is
driven by an electrical or pneumatic actuator.
If control valve and actuator are included in the delivery, the rel-
evant operating and installation instructions will also be
enclosed.
If equipment made by other manufacturers is used, the customer
must check the compatibility with the HygroMatik steam injection
humidifier.
7.1 Control Valve
The control valve regulates the steam quantity by means of the
valve lift. When the valve is closed the valve cone rests against
the valve face. When the valve rod lifts the cone there is a resul-
tant gap through which the desired quantity of steam flows. The
gap can be widened or narrowed as required.
Basically the customer is free to use any commercially available
control valve that is approved for steam control.
Standard delivery comprises Spirax-Sarco valves with HygroMa-
tik actuators. Alternative suppliers‘ devices are available upon
request.
Spirax-Sarco control valves Type LE33; KE63
Flanged A
[in/mm]
B
[in/
mm]
C
[in/
mm]
Kvs-value
[m³/h]
DN15 5.1/130 4/103 2.7/69 0.2, 0.4, 0.5, 1.0,
1.6, 4.0
DN20 5.9/150 4/103 2.7/69 6.3
DN25 6.3/160 4/103 2.7/69 10.0
DN32 7.1/180 5.2/132 2.7/69 16.0
DN40 7.9/200 5.2/132 2.7/69 25.0

Page 14
7.2 Actuator
The valve stem positioning towards the valve seat is controlled
by the actuator. In case of continous drive actuators the valve
stem position directly corresponds with the control signal.
To prevent air-duct over-saturation, all actuators - even pneu-
matically operated ones - should be equipped with a fail-safe
function. The fail-safe function immediately closes the control
valve in case of power failure or pressure loss.
Electrical Actuator
The spindle and valve stem are set in motion by the electrical
actuator by means of a motor.
Electrical actuators typically require a 24 V AC supply voltage
and a control signal of 0-10 V.
Actuators with a 3 position control for modulated control voltages
are also available.
In order to comply with DIN 32 730*, electrical actuators must
feature a fail-safe function so that in the case of power failure the
control valve is driven to a safe position (fully closed).
Pneumatic Actuator
Pneumatic Actuators are controlled using compressed air (e.g.
0.2-1bar).
Compressed air is supplied over a compressed air supply (3)
to a diaphragm (2). As soon as the supply pressure exceeds
the spring (1) strength the diaphram is pushed upwards. This
pulls the two actuator spindles (4) and control valve (5)
upwards and the actuator opens.
If control pressure drops the spring lowers the spindle again. In
case of a total pressure loss the spring immediately causes the
control valve to close.
Control valve signal options
pneumatic 0.2 - 1.0 bar
electrical 3-position 24V AC
(230V on request)
electrical 0 (2) - 10 V, continuous
Supply voltage 24V AC
electrical
0 (4) - 20 mA, continuous
Supply voltage 24V AC
The 500Ohm (or 2x1KOhm parallel) resisi-
tor is connected to over connectors 1 and 3.
The resistor is attached under the cover.
Type Hygromatik E-4111680
Type Spirax Sarco PN9000

Page 15
8. Start-up safety switch
The function of the start-up safety switch is to ensure that no
condensate from the steam network invades the air conditioning
duct through the steam lances.
Electrical Start-up safety switch
With an electrical actuator the supply voltage is looped through
the start-up safety switch. The start-up safety switch passes the
supply voltage only after a specified temperature level (here176°
F (80° C) ) is reached.
If the temperature falls below this level the fail-safe function is
triggered.
Pneumatic Start-up safety switch
The pneumatic start-up safety switch keeps an exhaust valve
open for compressed air as long as the specified temperature
has not been reached.
This prevents control air from entering the actuator.
If no start-up safety switch is available it is advisable to let the
unit run a few minutes before switching the control on. This
allows time for the steam lance heating system to heat the
lances.
Electrical Safety switch
E-4111952
capillary
tube
relief valve
screw 1/2”
temperature sen-
sor
1/8”
Please note

Page 16
9. Steam Lances
In the steam lances (1) dry steam is blown out of specially
formed nozzles (2). They are designed for low noise steam
emission. The nozzles take steam from the driest area in the
steam lance centre.
In order to prevent accumulated condensate or aerosol droplets
from being transported with the steam, the steam lances are
provided with a steam lance heating system (3). Due to this
system such droplets either evaporate or cannot form in the first
place.
The steam lance heating system can be fed by the separator or
from a separate steam reservoir.
Steam pressures of 1 bar or higher have an optimum heating
effect on the steam lances. With less pressure the pre-heating
and re-evaporation times may be lengthened.
Re-evaporation
In some cases condensate remains in the steam lances immedi-
ately following control valve closure. This condensate is evapo-
rated by the steam lance heating system and exits the steam
lances as pressureless steam. Re-evaporation of residual con-
densate can take up to 20 minutes. The higher the steam pres-
sure the better is the performance of the steam lance heating
system and the shorter the evaporation time.
Steam Lances
Inside thread M10
casting rust-free steel casting BS 3146/1.4550
Heating pipe Stainless steel 1.4404/1.4306
Main pipe Stainless steel 1.4306
Sealing cap Stainless steel 1.4306
Clip Stainless steel 1.4435
Nozzle Stainless steel 1.4301
Please note

Page 17
9.1 Technical Data
*h - installation length
*j - total length
*X- Installation length min. 1m (see Steam Lance heating system)
Steam lances are available as model 20 and 40 in various
lengths, suitable for duct widths from 110 in/280mm to 1517/
3855 in/mm.
Model 20
Lance-
code
h
[in/mm]
j
[in/mm]
Weight
1 86/218 133/338 1 lb 15 oz/0.88 kg
1.5 154/392 202/512 2 lb 8 oz/1.14 kg
2 224/568 271/688 3 lb 1.4 oz/1.4 kg
3 330/838 377/958 3 lb 15.5 oz/1.8 kg
4 452/1148 499/1268 4 lb 15.7 oz/2.26 kg
5 554/1408 602/1528 5 lb 13.5 oz/2.65 kg
6 676/1718 724/1838 6 lb 13.7 oz/3.11 kg
7 794/2018 842/2138 7 lb 13 oz/3,55 kg
8 913/2318 960/2438 8 lb 13. oz/4 kg
9 1035/2628 1082/2748 9 lb 13 oz/4.46 kg
10 1157/2938 1204/3058 10 lb 13.5 oz/4.92 kg
11 1275/3238 1322/3358 11 lb 13.4 oz/5.37 kg
12 13/973548 1444/3668 12 lb 13.6 oz/5.83 kg
Model 40
Lance-
code
h
[in /mm]
j
[in /mm]
Weight
1 86/218 136/345 3 lb 2.8 oz1.54 kg
1.5 154/392 204519 4 lb 5.5 oz/1.97 kg
2 224/568 274/695 5 lb 4.3 oz/2.39 kg
3 330/838 380/965 6 lb 10.8 oz/3.03 kg
4 452/1148 502/1275 8 lb 5.3 oz/3.78 kg
5 554/1408 604/1535 9 lb 11.2 oz/4.40 kg
6 676/1718 726/1845 11 lb 5.6 oz/5.15 kg
7 794/2018 844/2145 12 lb 15 oz/5.87 kg
8 913/2318 963/2445 14 lb 8.5 oz/6.59 kg
9 1035/2628 1085/2755 16 lb 2.9 oz/7.34 kg
10 1157/2938 1207/3065 17 lb 13 oz/8.08 kg
11 1275/3238 1325/3365 19 lb 6.4 oz/8.80 kg
12 13/973548 1447/3675 21 lb 0.8 oz/9.55 kg
Inst. length h in/mm 86/218 154/390 224/568 330/838 452/1148 554/1408 676/1718
Duct width (max.)* in/mm 154/390 222/565 329/835 445/1130 553/1405 675/1715 793/2015
Duct width (min.)* in/mm 87/220 156/395 224/570 331/840 453/1150 555/1410 677/1720
Lance code 11.523456

Page 18
*Duct width is internal dimension
9.2 Number of steam lances
The steam lance system may comprise multiple steam lances.
With a duct height of more than 394 in (1000 mm), multiple
lances should be positioned horizontally one on top of the other.
This ensures an even steam distribution. See table for number
of steam lances recommended for various duct heights.
Check number of steam lances when the following factors
apply:
• duct air speed exceeds 5yd 1.4 in/s (5 m/s)
• Duct air temperature under 69.8° F (21° C)
• Last fine mesh filter located less than 118 in (3 m) down-
stream of the steam lance
• Air flow branching occurs less than 39.4 in (1 m) down-
stream of the steam lance
Depending upon additional parameters such as pre-defined
steam output, existing or desired absorbtion distance or rise in
humidity the installation of additional lances may improve effi-
ciency.
Steam lance piping for multiple steam lances
HygroMatik standard supply is for lengths of 118 in (300 mm)
und 177 in (450 mm). Distances are approximate and can
vary from installation to installation. Piping should be
installed for even lance distribution along the duct height. Dis-
tance between duct floor and ceiling should not exceed 98 in
(250 mm).
Inst. length h in/mm 794/2018 913/2318 1035/2628 11/572938 1275/3238 1397/3548
Duct width (max.)* in/mm 911/2315 1034/2625 1156/2935 1278/3245 1396/3545 1518/3855
Duct width (min.)* in/mm 795/2020 913/2320 1035/2630 1158/2940 1276/3240 1398/3550
Lance code 78 9101112
Duct height No. of Lances
up to 394 in/1000 mm 1
394- 669 in/1000 - 1700 mm 2
669-866 in/1700 - 2200 mm 3
866 - 1024 in/2200 - 2600 mm 4
over 1024 in/2600 mm 5
Please note

Page 19
10. Pressure Gauge Station
Installation of a pressure gauge on the steam injection unit
ensures immediate detection of pressure drops or fluctuations.
The HygroMatik Pressure gauge station consists of a tubular
spring pressure gauge (0-6 bar), a T-junction and a dual nipple.
The pressure gauge is temperature resistant up to 392° F (200°
C).
Pressure gauge shut-off valves and siphons are available on
request.
The pressure gauge station is to be installed upstream of the
steam injection unit.
Please note

Page 20
11. Ball Float Steam Trap
After separation from the steam inside the separator condensate
is drained out through a ball float steam trap.
11.1 Function
The discharge valve is controlled by the ball float dependent
upon the density of the incoming medium.
Starting Position / Air
When the unit starts, air present in the system is discharged
through the thermostatic air extractor fan.
Normal Operating Conditions / Condensate
As soon as incoming condensate causes the float to rise, it flows
through the valve and extractor fan into the condensate network.
Hot condensate closes the thermostatic extractor but the con-
densate can continue to flow out through the valve.
Steam
If steam enters, the thermostatic extractor closes and the float
descends until the valve closes.
Risk of water hammers!
Water hammers can severely damage the ball float.
Avoid depressions in steam pipe that might fill with condensate.
Risk of frost hazard in outdoor installations!
Condensate deposits in outdoor installations increase the risk of
freezing. Avoid depressions in steam pipe that allow for conden-
sate load.