Remak AeroMaster Cirrus Series User manual

Air Handling Units
INSTALLATION AND OPERATING INSTRUCTIONS 05/2015

2
Air Handling Units
Contents
Application, Operating Conditions and Construction ......................................................................................................................................... 3
 Manufacturer‘sNotication ........................................................................................................................................................................... 3
Application and Operating Conditions .......................................................................................................................................................... 3
Air-Handling Unit Construction ..................................................................................................................................................................... 3
Air-Handling Unit Marking............................................................................................................................................................................. 3
Information and Safety Labels ...................................................................................................................................................................... 3
Side Variability of Unit Connections.............................................................................................................................................................. 3
Goods Despatch...................................................................................................................................................................................................... 4
Delivery Content ........................................................................................................................................................................................... 4
Transport and Storage.................................................................................................................................................................................. 4
Packaging ..................................................................................................................................................................................................... 4
Transport and Handling of Air Handling Unit Components ........................................................................................................................... 4
Rotary Heat Exchanger Transport ................................................................................................................................................................ 4
Storage Conditions ....................................................................................................................................................................................... 4
Installation................................................................................................................................................................................................................ 5
Installation Site ............................................................................................................................................................................................. 5
Service Access ............................................................................................................................................................................................. 5
Pre-Installation Inspection ............................................................................................................................................................................ 5
 IdenticationofAir-HandlingUnitComponents ............................................................................................................................................ 5
Assembly of Air-Handling Unit Sections ....................................................................................................................................................... 6
Assembly of Base Frames............................................................................................................................................................................ 6
Assembly of Individual Sections ................................................................................................................................................................... 6
Rotary Heat Exchanger Block Alignment...................................................................................................................................................... 7
Connection of Heat Exchangers ............................................................................................................................................................................ 9
Water Heat Exchangers................................................................................................................................................................................ 9
Connecting Dimensions of Water Heat Exchangers..................................................................................................................................... 9
Direct Evaporators ........................................................................................................................................................................................ 9
Connection of Direct Evaporators................................................................................................................................................................. 9
Water Connected Air-handling Component Installation .............................................................................................................................. 10
Condensate Drainage................................................................................................................................................................................. 11
Other Connections ................................................................................................................................................................................................ 11
Air-handling Duct Connection ..................................................................................................................................................................... 11
Electric Equipment Wiring........................................................................................................................................................................... 11
Wiring of Motors.......................................................................................................................................................................................... 12
Wiring Diagrams – Fan Motors ................................................................................................................................................................... 12
Wiring Diagrams – Electric Heaters............................................................................................................................................................ 12
Commissioning...................................................................................................................................................................................................... 13
Safety precautions ..................................................................................................................................................................................... 13
Protection against Dangerous Contact with Non-Live Parts....................................................................................................................... 13
Inspection Prior the First Start-Up .............................................................................................................................................................. 13
Checking During the First Start-Up............................................................................................................................................................. 13
Service regulations ..................................................................................................................................................................................... 12
Operating Checks and Service Regulations....................................................................................................................................................... 14
Unit Operation - Service Regulations ......................................................................................................................................................... 14
Unit Operation Screening Checks .............................................................................................................................................................. 15
Regular Inspections .................................................................................................................................................................................... 15
Filter Replacement...................................................................................................................................................................................... 17
Spare Parts and Service ....................................................................................................................................................................................... 20
Spare parts, Service, Disposal ................................................................................................................................................................... 20
Complementary Information .................................................................................................................................................................................... 21
Covering Roof Assembly ............................................................................................................................................................................ 21
Gas Heater Section .................................................................................................................................................................................... 27
Integrated Cooling Section ......................................................................................................................................................................... 28
Supplementary information - Pool design of units, 2nd Generation ........................................................................................................... 29
 Replacementoffabricsinsideofinsertlter............................................................................................................................................... 31
General Information
AeroMaster Cirrus air-handling units are manufactured in accordance with valid Czech and European regulations and technical standards.
AeroMaster Cirrus air-handling units must be installed and used only in accordance with this documentation.
The manufacturer is not responsible for any damage resulting from use other than intended, and the customer bears the risks of such use.
The installation and operating documentation must be available for the operating and servicing staff.
It is advisable to store this documentation close to the installed air-handling unit.
When handling, installing, wiring, commissioning, repairing or servicing the air-handling units, it is necessary to observe valid safety rules,
standards and generally recognized technical rules. In particular, it is necessary to use personal protective work aids (e.g. gloves) because
of sharp edges and corners when performing any handling, installing, dismounting, repairing or checking. All equipment connections must
comply with the respective safety standards and regulations.
 AnychangesormodicationstoindividualcomponentsoftheAeroMasterCirrusair-handlingunitswhichcouldaffectitssafetyandproper
functioning are forbidden.
Before installing and using the air-handling units, it is necessary to familiarize yourself with and observe the directions and
recommendations included in the following chapters.
AeroMaster Cirrus air-handling units, including their individual parts, are not intended, due to their concept, for direct sale to end customers.
 Eachinstallationmustbeperformedinaccordancewithaprofessionalprojectcreatedbyaqualiedair-handlingdesignerwhois
responsible for the proper selection and dimensioning of components concerning their suitability for a given application. The installation and
commissioning may only be performed by an authorized company licensed in accordance with generally valid regulations.
When disposing of components and materials, it is necessary to observe the respective environmental protection and waste disposal
 regulations.Incaseofnaldeviceliquidation,itisnecessarytofollowthepolicyofdifferentialwastedisposal.Werecommendmetalparts
be scrapped and other parts be disposed of in accordance with separated waste regulations.
The latest version of this document is available on our website: www.remak.eu

3
Air Handling Units
Application, Operating Conditions and Construction
Manufacturer‘s Notication
AeroMaster air-handling units are manufactured in accor-
dance with valid Czech and European regulations and
technical standards. AeroMaster air-handling units must be
installed and used only in accordance with this documen-
tation. The installation and operating documentation must
be available for the operating and servicing staff, and it is
advisable to store this documentation close to the installed
air-handling unit.
Application and Operating Conditions
AeroMaster Cirrus air-handling units are designed for
comfortableair-handlingandair-conditioninginanairow
range corresponding to the air-handling unit’s cross-sec-
tionandrequiredairowvelocityfrom1.5-4m/satanair
pressure difference of the fan of up to 2500 Pa. The air-
-handling unit is designed as a modular system with a fra-
meandlaminatedconstructionwhichenableshighexibi-
lity.Thusindividualmodicationtocustomerrequirements
is possible. Inner width (W), height (H) and length (L) are
multiples of the module (N × 306 mm) and create space for
the installation of built-in functional assemblies.
AeroMaster Cirrus air-handling units are intended for
installationonoorsorsubstructures,andaredelivered
with a rigid base frame mounted in the factory.
 Theyaredesignedtotransportairwithoutsolid,brous,
sticky, aggressive or explosive impurities. The transpor-
ted air must be free of corrosive chemicals or chemicals
aggressive to zinc and steel, respectively aluminium.
They are manufactured with the same construction for
inside as well as outdoor environments, including units
designed for rooms with greater requirements for cleanli-
ness. Air-handling units intended for outside environments
are completed with suitable accessories (roof, louvers,
etc.) ensuring correct and failure-free operation. With the-
se air-handling units, the correct selection, localization and
connection of the M&C components, including anti-freeze
protection, must be ensured.
AeroMaster Cirrus air-handling units can be used in
normalrooms(IEC60364-5-51,resp.ČSN332000-5-
51ed.2,ČSN332000-1ed.2)andinroomswithexten-
ded ambient temperature range from -30 °C to + 40 °C
without additional measures - applies to the standard
version. Custom-made units with decreased -40 °C to
+40 °C or increased -30 °C +50 °C temperature range
of transported air can be delivered.
When designing the air-handling assembly, it is
necessary to take into account the temperature and
humidity of the inlet and outlet air in relation to the
ambient temperature and humidity. It is especially
necessary to analyze the relation of the unit's casing
classicationpursuanttoEN1886andtheriskofcon-
densation, respectively ice build-up.
The device can be used for outdoor installations if
equipped with a protecting roof; the device is water
spray proof (rain up to 60° vertical slant) while obser-
ving the Installation and Operating Instructions.
The fans are equipped with motors insulated with F
class insulation of the winding.
The unit's noise level does not exceed max. allowed
valuesasperStatutoryOrderNo.176/2008Sb,Appen-
dix No. 1, Article 1.7.4.2., Letter u).
Air-Handling Unit Construction
The air-handling unit is designed as a modular system
with a frame and laminated construction. The walls consist
oftwolayersofuniedmodularlaminasattachedtothe
frame.Therstlayeroftheupper,lowerandbackwalls
has longitudinally-oriented laminas while the second la-
yerlaminasarecross-oriented.Thefrontwallttedwith
service panels has laminas oriented in the same direction
in both layers. The service parts (panels) are also of la-
minated construction. Each panel consists of the external
casing with integrated reinforcements.
The panels which are expected to enable occasional servi-
ce access to the internal built-in assemblies are provided
with locks and grab handles to make handling easier. The
panelsusedforregularservicing(replacementoflter
inserts, cleaning of built-in assemblies, etc) are provided
with hinges and locks.
All walls are of sandwich construction with a total insu-
lation thickness of 50 mm. They are provided with a quality
anti-corrosionsurfacenish.Theconnectionsbetween
walls, panels and supporting cross-members are sealed
with a seal with closed cell structure.
The seals used during the assembly of the air-handling
unit’s lamellar walls and casing have a closed cell structu-
re. The non-glued replaceable sealing of the service pa-
nelsisttedintothegrooveontheinnersideofthepanel.
Internal casing: Standard version - galvanized sheet
steel, optionally painted sheet steel (polyester paint) or
stainless sheet steel
External casing: Standard version - galvanized sheet
steel, optionally painted sheet steel (polyester paint) or
stainless sheet steel
 Frameproles:Standardversion-hot-dipgalvanized
sheet steel, optionally painted sheet steel (polyester paint)
Insulation of the upper and side panels is made of 50
mm thick non-combustible mineral wool (Class A1 pur-
suantČSNEN13501-1).
Insulation of the lower panels is made of 50 mm thick
PUR foam boards (Class B2 pursuant DIN 4102).
The joints are sealed with silicone compound.
Air-Handling Unit Marking
The complete AeroMaster Cirrus air-handling unit is
divided into "structural" BLOCKS, respectively transport-
installationBLOCKS.Functionally,theblockisdenedby
the internal built-in assembly (assemblies) which is (are)
ttedintotheblock'scasing,wherethecasingiscreated
with laminated walls, supporting cross-members and a
combination of service panels situated on the access side
of the unit.
The air-handling unit is then assembled from the trans-
port-installation blocks at the installation site. At the outlet,
thetransport-installationblocksarettedwithanendpanel
or a frame to be connected to the next block.
BLOCK is provided with a BLOCK type (name) plate
indicating the following data:
Manufacturer's name (incl. logo) and address
Type, size and marking code of the BLOCK
BLOCK serial number
 Ordernumber(serialnumber)/yearofproduction
Weight

4
Air Handling Units
Despatch
Side Variability of Unit Connections
Connectionsideisalwaysdeterminedbytheair-ow
direction:
Transport and Handling of Components
Air-handling units are transported to the installation site
either as transport-installation blocks or disassembled (for
transport and handling of disassembled units, refer to the
separate manual).
Loading, unloading and handling can be performed by a
fork-lift truck, a manipulating carriage or a crane. If lifted
by crane, spacer bars must be inserted between the lifting
wires to protect the air-handling unit from being damaged.
If air-handling unit blocks without a base frame are han-
dled,fork-lifttruckforksofasufcientlengthmustbe
used to overreach the full depth of the lifted block. If the
air-handling unit block with a base frame is handled, forks
ofasufcientlengthmustbeusedtooverreachbothside
beams of the base frame.
Figure 2 – Handling options
The "Other Danger" warning label situated on the face
side of the service door indicates the hazard of catching
by movable parts.
The service panels covering electrical equipment are
labelled with a "Warning – Danger of Electric Shock"
warning label.
Information and safety labels
AeroMaster CIRRUS air-handling units, respectively indi-
vidual sections, are also labelled with information labels
indicating equipment operation, wiring diagrams, energy
media inlets and outlets and logos of the manufacturer.
Delivery Contents
The following items are enclosed with every delivery of
the air-handling unit:
Accompanying technical documentation
(Installation and Operating Instructions)
Commercial and technical documentation, including
air-handling unit assembly drawing
Connecting material kit
Installation kit
Measuring & control components, respectively
accessories in accordance with the bill of delivery
Transport and Storage
Air-handling units with a base frame of standard height
(85mm) are dispatched on a pallet or transportation
prisms.
Air-handling units equipped with a raised base frame
(with supporting legs) are dispatched without additional
handling means.
Packaging
As standard, the transport blocks of the Cirrus air-handling
units are packed in PE foil and provided with cardboard
and polystyrene protecting guards. The holes in the base
frame can be used to lift the unit by a crane.
Figure 1 – side variability of unit connections
LEFT-HAND VERSION RIGHT-HAND VERSION
Air-ow
direction
Figure 3 – Handling holes in base frame
Each built-in assembly is marked with a type (name)
plate situated on the service panel side. The name plate
includes the technical parameters of the given built-in as-
sembly. The user must ensure that every marking on the
unit components will be readable and intact for the whole
service life of the unit. If damaged, especially if safety is
concerned, the marking must be repaired immediately.

5
Air Handling Units
Installation
Storage Conditions
As standard, the air-handling units are packed in PE foil.
They must be stored in indoor rooms complying with the
following conditions:
Maximum relative air humidity must not exceed 85%.
No moisture condensation.
Ambient temperature must be in the range
-20°C to+40°C.
The air-handling units must be protected against pene-
tration of dust and caustic vapours, or other chemical sub-
stances which could cause corrosion of the air-handling
unit’s structural components and equipment.
The air-handling units must not be exposed to the
direct effects of solar radiation.
AeroMaster Cirrus air-handling unit blocks may only be
stored in the same position in which they are operated.
Prior to installation, the following must be
checked
Delivery completeness
Delivery integrity
Volubility of rotary components
(fans, dampers, rotary heat exchanger)
Parameters of the power supply and connected energy
media sources
Any found fault must be removed before starting the
installation.
Figure 5 – service access
Keep these distances from the wall to enable service and access:
0.8 x width (W) of the air-handling unit: fan
1.15 x width (W) of the air-handling unit: heater, cooler, drop
eliminator,lter,plateheatexchangerandrotaryheatexchanger.
Every service access can be visualized in the AeroCAD program.
Identication of Components
The association of blocks and built-in assemblies to the
particular purchase order number is indicated on the name
plate of each block and built-in assembly, i.e. device num-
ber. All blocks bearing the same device number create
an air-handling unit. The manner of the blocks' assembly
is apparent from the assembly drawing included in the
accompanying technical documentation (respectively our
offer) marked with the same order (device) number.
Air-Handling Unit Location
The surface of the site for the air-handling unit installation
mustbelevelandat.Maximummisalignmentoftheoor
or supporting structure intended for the air-handling unit
installation must not exceed 1 mm per 1 meter. Observan-
ce of this condition is important for installation as well as
for the air-handling unit operation. The air-handling unit
equipped with an integrated base frame does not need any
special anchoring. It is advisable to ground the air-handling
unit with grooved rubber stripes.
When installing the gas heater block, it is necessary to
maintainsafetydistancesfrominammablematerials
in accordance with national directives and standards of
thestateofinstallation(intheCzechRepublic–ČSN06
1008).Noinammablematerialsareallowedtobestored
within the area of the gas heater block installation
Warning: The base frame or base frame and founda-
tion height should respect the condensate drainage
siphon height if not resolved in another way (e.g. em-
bedding into the oor or installation on an additional
base frame of the required height).
Service Access
When planning the air-handling unit location, it is necessa-
rytokeepsufcientspaceformaintenance,serviceand
operating. The need for this space depends on the air-han-
dlingunitconguration,i.e.ontheoperationalblocksused.
The air-handling unit blocks are packed in PE foil.
Warning: When transporting, respectively handling
the air-handling unit blocks, it is necessary to pay inc-
reased attention to those parts (pipes, closure valves,
etc.) projecting from the walls of the air-handling unit
block. All blocks may only be transported in the same
position in which they are operated!
Rotary Heat Exchanger Handling
Increased attention must be paid to the safety of persons
as well as of the product when handling the rotary heat
exchanger block, which due to its dimensions (tall and
narrow), weight and high centre of gravity is very unstable.
Themanufacturerrecommendsalwaysxingtherotary
heat exchanger in position by suitable roping if it is not as-
sembled in the block assembly! The rotary heat exchanger
can only be stored, transported or handled in the vertical
position.Anytiltingmaydamagetherotoratness.
Particular distances for the CIRRUS air-handling units:
Fan 0,8 x width*
Heater, cooler, eliminator 1,15 x width*
Filter 0,8 x width*
Plate heat exchanger 1.15 x width*
Rotary heat exchanger 0,8 x width*
* width of the built-in assembly
Figure 4 – Rotary heat exchanger handling options
do not tilt!

6
Air Handling Units
Assembly of unit blocks
Connection of Individual Blocks
Paste the rubber sealing (19 x 4) onto the contact surfaces
of the connecting frame.
Push the connected blocks against each other and screw
the blocks together in the corners of the connecting frame
using M8 x 40 bolts
(seegure).
If the stacked arrangement of the air-handling unit blocks
is used, an additional connection will be necessary - using
the upper block's base frame.
Connection of
Unit Blocks
The air-handling unit
blocks can be assem-
bled together by
connecting their base
frames and connecting
the respective blocks.
Connection of
Base Frames
Connection of base
frames using M8x20
bolts. The bolts and other connecting materials are inclu-
ded in the installation kit
Figure 6 – connection detail
Figure 9 – Internal connection of blocks
Figure 7 –Sealing between blocks
M8 × 30
M8 × 40
contact surfaces
of the connecting
frame to be glued
with rubber seal
18 x 4 mm
Figure 8 – Screw Head Caps
see above
Screw Head Caps
After the air-handling
unit blocks have been
connected, the screw
head caps have to be
ttedonallthepanels
on the air-handling unit
service side.
Warning: When connecting the transport and handling
blocks of the air-handling unit, do not remove the rear
laminated walls - they are an integral part of the casing
structure!

7
Air Handling Units
Rotary Heat Exchanger Block Alignment
Alignment procedure
Attention!
Due to its dimensions, the rotary heat exchanger
is very easy to roll over! Even the slightest impact or
rocking can cause the exchanger to fall.
Make sure the assembled heat exchanger is not left
without being secured against fall.
To secure the heat exchanger, use fastening straps or
connect the adjacent chambers to the exchanger.
Depending on the air-handling unit base frame height
and heat exchanger size, the heat exchanger can be
equipped with transport legs to make its handling
easier.
Figure 11 – Transport brake removal
Figure 13 – Disassembled Heat exchanger
Figure 10 – Exchanger securing and risk of falling
Figure 12 – Transport legs
The rotary heat exchanger can be transported using
common transport means while the rotary heat
exchanger must always be secured in the vertical
position (i.e. the axis of rotation is in the horizontal
position).
It is advisable to start with this (the heaviest) block when
placing the assembly blocks in position. Immediately co-
nnect the rotary heat exchanger to the adjacent chamber
to prevent it falling. Before connecting it to the adjacent
chamber,placethesealontheconnectionframe(seegu-
re # 7).
Warning:
The rotary heat exchanger is equipped with a transport
brake which secures the rotor against free movement
during transport and handling. This brake must be
removed!
These legs must be removed before heat
exchanger alignment!
Larger heat exchangers are transported disassembled.
The delivery includes separated lower and upper half of
the frame and segments of the rotor. Installation and com-
missioning of the device can only be performed by a profe-
ssional installation company trained or authorized to carry
out this work by the manufacturer.
 Everyrotaryheatexchangeristtedwith
“THIS SIDE UP! and “FRAGILE” labels

8
Air Handling Units
Rotary Heat Exchanger Block Alignment
Warning:
Poorand/orincorrectinstallationoftherotaryheatex-
changer block can result in costly repairs. It will result in
rotordisplacement,whichwillinuencethetightnessand
service life of the assembly. Misalignment can be caused
by improper handling during transport or failing to observe
the conditions for correct installation. To check heat ex-
changer rotor fouling, it is necessary to perform regular
monitoring of the heat exchanger rotor pressure loss. The
heat exchanger rotor pressure loss must not exceed 15%
of the pressure loss value measured on a new rotary heat
exchanger. To enable regular servicing, maintenance,
guarantee and post-guarantee service, it is necessary to
provide a service access from both sides of the heat ex-
changer's rotor.
Figure 14 – of the heat exchanger to the assembly
Figure 15 – Frame connection detail













9
Air Handling Units
Connection of Heat Exchangers
Water and Glycol Heat Exchangers
The heat exchangers can be delivered in versions to be
connected:
a)throughthexedsidepaneloftheair-handlingunit
b) into the inner cross-section:
Figure 16 – Heating and cooling media feed
The corresponding connection points are marked with
labels on the unit side panel (heating water inlet, heating
water outlet, coolant inlet, coolant outlet).
The connection diameter corresponds with the heat
exchangerandgiventypeparameters,anditisspeciedin
the air-handling unit documentation. Available dimensions
are from G1" to G3".
TheheadersareequippedwithG3/8"necksfortheair-
venting valve in the upper part of the heat exchanger;
these necks also enable an antifreeze protection sensor to
be installed (on the exchanger outlet header) or the heat
exchanger to be drained.
Figure 17 – Anti-freeeze protection sensor
Connection of Water Heat Exchangers
The counter-current connection of the heat exchangers
is necessary to achieve maximum output. When con-
nectingthefeedingttingstotheheatexchangers,usetwo
wrenches to tighten the screws to avoid wresting of the
exchanger's headers.
After connecting the water heat exchangers (heaters and
coolers, including mixing sets) to the distribution piping,
itisnecessarytopressurize(llwithwater)andventthe
entire circuit, including the heat exchanger, and then to
perform leak-tightness checks of all pipe joints and of the
exchanger itself (including inspection of the water exchan-
ger block interior).
The manufacturer does not provide any guarantee
covering any damage resulting from liquid leakage from
leaky joints or damaged exchangers.
Figure 18 – Heat exchanger connection
Figure 19 – Glycol circuit connection
Figure 20 – Connection of evaporators
Direct Evaporators
Direct evaporators must be connected by a specialized
contractor authorized to install refrigerating equipment.
The direct evaporators can be delivered in versions to be
connectedthroughthexedsidepaneloftheair-handling
unit or into the inner cross-section.
Thedirectevaporatorsarelledwithnitrogeninthefacto-
ry. They can be delivered in single or multiple-circuit versi-
ons.
NECKS for installation of the antifreeze pro-
tection sensor and air-venting valve
A i r   o w  d i r e c t i o n 
(cooler right-hand
version)
A i r   o w  d i r e c t i o n 
(cooler
right-hand
version)
Inlet
Outlet Inlet
Outlet
Glycol cooler Glycol heater
1) Circulation pump
2) Air-venting valve
3)Inlet/outletvalve
4) Safety valve
5) Expansion tank
6) Pressure gauge
3 1 3
2 4 5 6 2
Double-circuit evaporator Double-circuit evaporator
inlet
outlet
Single-circuit evaporator
inletoutlet
Single-circuit evaporator
1
2
1
2
1
2
1
2A i r   o w  d i r e c t i o n 
(cooler right-hand
version)
A i r   o w  d i r e c t i o n 
(cooler right-hand
version)
A i r   o w  d i r e c t i o n 
(cooler right-hand
version)
A i r   o w  d i r e c t i o n 
(cooler right-hand
version)

10
Air Handling Units
Connection of Heat Exchangers
Water Connected Air-handling Component
Installation
Recommendations on water quality for heat exchangers
that operate using low pressure hot water (LPHW) and
chilled water:
A good water quality – e.g. salt and lime-free drinking
water – increases the
lifetimeandefciencyoftheheatexchanger.
Check the limiting values shown in the table annually to
prevent damage to
the hydraulic system and its components.
If necessary inhibitors must be added.
Note:
These limiting values are only basic information about the
water quality and do not form any basis for a guarantee!
1/1,78°D=1°Fr,with1°Fr=10gCaCO3/m3
ppm=partspermillion(mg/l)
ppm=partsperbillion(µg/l)
Description Symbol Values Effects in vent
of deviation
Hydrogen ion
concentration pH 7,5 - 9 < 7 > 9
Corrosion
Fouling
Calcium and
magnesium content
Hard-
ness
(Ca/Mg)
4 – 8,5 °D > 8,5 Fouling
Chloride ions Cl- < 50 ppm Corrosion
Carbon dioxide Fe3+ < 0,5 ppm Corrosion
Iron ions Mg2+ < 0,05
ppm Corrosion
Carbon dioxide CO2< 10 ppm Corrosion
Hydrogen sulphate H2S < 50 ppb Corrosion
Oxygen O2< 0,1 ppm Corrosion
Chlorine Cl2< 0,5 ppm Corrosion
Ammonia NH3< 0,5 ppm Corrosion
Ratioofcarbons/
sulphates
HCO3
2- /
SO4
2- >1 <1 Corrosion