System air HHCompact Series Owner's manual

HHCompact Air Handling Units
Installation, operation and maintance instructions

2 | HHCompact Air Handling Units
Content
Safety considerations
41.1 - General
41.2 - Applications
41.3 - Instruction types
61.4 - Disposal of parts/materials
Transporting and lifting constructions
62.1 - General
62.2 - Transport and storage
62.3 - Roof edge protection during transport (outside installation)
7 2.4-Ofoadingandhoisting
72.5 - Horizontal transport
72.6 - Storage
72.7 - Assembly
7 2.8-Schematicdiagramofanairhandlingunitwithcontrols
Checklist of start-up check points
11 3.1 - Checklist of start-up check points
Start-up instructions
12 4.1 - Casing
12 4.1.1 - Casing panels
12 4.1.2 - Doors and access covers
12 4.1.3 - Flexible connections
12 4.1.4 - Earthing
12 4.1.5 - Duct connections
13 4.1.6 - Outdoor air intake
14 4.1.7 - Assembly and placement of the air handling unit
14 4.1.8 - Air contamination
14 4.1.9 - Condensation in or on the AHU
14 4.1.10 - AHU support
15 4.2 - Dampers
15 4.3-Airlters
15 4.4 - Heaters
15 4.4.1 - Hot water coil
16 4.4.1.1 - Coils containing glycol
16 4.4.2 - Electric heater
17 4.4.3 - Electric heaters in combination with changeover coil
17 4.5 - Coolers
17 4.5.1 - Chilled-water coil
18 4.6 - DX-coils
19 4.7-Heatrecoverywheel
19 4.8-Plateheatexchanger
19 4.9 - Recirculation damper

HHCompact Air Handling Units | 3
20 4.10 - Fan
22 4.10.1 - Plug fans
22 4.10.2 - Frequency converter
22 4.10.3 - Plug fans with built-in EC motors
24 4.11 - Silencer
24 4.12-Lightning
24 4.13 - Control panel
25 4.14-Installationofexternalsensorsincluded
26 4.15 - Sensor replacement
Maintenance checklist
27 5.1-Checklistofcheckpointsandmaintenanceintervals
Maintenance and operating instructions
28 6.1 - General
28 6.2 - Casing panels
28 6.2.1 Inside installation
28 6.2.2 Outside installation
28 6.3 - Doors and access covers
28 6.4-Flexibleconnections
28 6.5-Earthing
28 6.6 - Dampers
28 6.7-Outdoorairintake
28 6.8 - Filters
29 6.9 - Heaters
29 6.9.1 Hot water coil
29 6.9.2 Electric heater
30 6.10 - Coolers
30 6.10.1 - Chilled-water coil
30 6.11-Heatrecoverywheel
30 6.12-Plateheatexchanger
30 6.13 - Recirculation damper
30 6.14 - Fan
30 6.14.1 General
30 6.14.2 Bearings
31 6.14.3 Transmissions
31 6.15 - Silencer
31 6.16 - Control
Abbreviations
AHU- Air Handling Unit
PED - Pressure Equipment Directive
BMS- Building Management System
SSR - Solid-state Relay
SUP - Supply Air
 ETA -ExtractAir
ODA- Outdoor Air
 EHA-ExhaustAir
 HMI-Human-MachineInterface
RH - Relative Humidity
VU - Ventilation Unit
NRVU - Non-Residential Ventilation Unit
BVU - Bidirectional Ventilation Unit
UVU - Unidirectional Ventilation Unit
 NOTE:Alldimensionsintheillustrationsareinmm

4 | HHCompact Air Handling Units
Safety Considerations
1.1 - General
TheHHCompactairhandlingunits(AHUs)havebeen
designedandmanufacturedinaccordancewiththeCE
machinedirective.Inordertoguaranteesafeoperation
anduseoftheunit,pleasecarefullyreadandobservethe
instructionsinthisdocumentandpayspecialattentionto
thewarningsthatapplytothisunit.Anymodicationsin
thedesignand/orinstallationoftheAHUthatarecarried
outwithoutpriordiscussionwithSystemairB.V.and
withoutadvancewrittenagreementwillresultintheloss
oftherighttoanywarrantyclaimsandanyclaimforinjury
topersonnelasaresultofthesemodications.
Allworkmustbecarriedoutbysufcientlytrained
personnel. All applicable personal safety devices must be
usedtoensuresafeworkingconditions.Safetyglovesand
glassesmustbewornforallmaintenanceoperations.A
respiratoryprotectionmaskmustbewornwhenchanging
thelters.TheA-weightedequivalentcontinuoussound
pressurelevelcanbeabove80dB(A),dependingonthe
motorsize,fansize,fanspeedandtheAHUinstallation
location.Thismeansthateardefendersmustbeworn,
whenthefanisrunning.
Alldoorsandhatchesmusthaveatleastonelockthat
canonlybeopenedwithaspecialdevice.Heatingand
cooling coils are manufactured and supplied in accordance
withguidelinesofthePressureEquipmentDirective(PED).
Donotwalkontheroofpanelsofunitsinstalledinsideor
outside.
Onlysufcientlyqualiedpersonnelisallowedtowork
on(electrical)components.Allpowersuppliestothe
unitmustbedisconnected,beforeanyworkcanbe
carriedout.Switchoffthesupplyvoltageusingthemain
disconnectswitch.
CAUTION:Ingeneralelectricheatershaveaseparate
supplyandmustbeswitchedoffseparately.
Ifworklightingisrequired,useonlylightingwith24V
maximum.Useofelecticalequipmentwithavoltage
above48Visonlypermittedifanearthleakageswitchis
installedthatcomplieswithlocalandnationalregulations.
1.2 - Applications
TheAHUisdesignedforthemovementandconditioning
ofair,unlessotherwiseagreedduringthedesignstage.
FromJanuary1st,2016AHUsmustcomplywithEU
regulation 1253/2014 implementing ErP directive
2009/125/EC,iftheyarewithinthescopeofthe
regulationandthedirective.
EUregulation1253/2014ispartoftheCE-marking.
Thisregulationappliesfor:
• ‘ventilation unit’ (VU) means an electricity driven
applianceequippedwithatleastoneimpeller,one
motor and a casing and intended to replace utilised air
by outdoor air in a building or a part of a building.
WhereanAHUisregardedasa:
• ‘non-residential ventilation unit’ (NRVU) means a
ventilationunitwherethemaximumowrateofthe
ventilationunitexceeds250m3/h,and,wherethe
maximumowrateisbetween250and1000m3/h,
themanufacturerhasnotdeclareditsintendeduseas
beingexclusivelyforaresidentialventilationapplication.
Theregulationdenestwotypesofventilationunits.
Thesemustbeplacedonthemarketorputintoservice,in
accordancewiththerequirementsofthisregulation.
• ‘unidirectional ventilation unit’ (UVU) means a
ventilationunitproducinganairowinonedirection
only,eitherfromindoorstooutdoors(exhaust)orfrom
outdoorstoindoors(supply),wherethemechanically
producedairowisbalancedbynaturalairsupplyor
exhaust
‘bidirectional ventilation unit’ (BVU) means a ventilation
unitwhichproducesanairowbetweenindoorsand
outdoorsandisequippedwithbothexhaustandsupplyfans
ThefollowingunitcombinationsareconsideredasaBVU:
• TwoormoreunitscombinedwithaRACheatrecovery
system
• Twoormoreunitsdirectly(withoutbuilding-side
ductwork)connectedwithamixingchamber.
Iftwoormoreunitsarecombinedasdescribedabove
on-siteinthebuildingbyathirdparty(forexampleinstaller),
aBVU(basedonCE-markedUVUs)willbe“putintoservice”.
Thismeansthethirdpartyhastodeclareproductconformity
withtherequirementsofaBVUandCEmarking.
Unitscanbesuppliedwithoutaccessoriesthatare
indicatedasmandatoryinregulation1253/2014.These
accessoriesmustbesuppliedandinstalledbyathirdparty.
Theaccessoriesthatarenotsuppliedbutmandatoryare
indicatedinthetechnicalspecicationoftheAHU,e.g.
fanswithvariablespeeddrive,thermalbypassdevice,heat
recovery,visualsignalingoralteralarm(2018regulation).
1.3 - Instruction types
Thefollowingwarningpictogramsandlabelswithtextare
used.
Lifting point
ThispictogramshowswheretheAHUmustbeliftedandis
positionedonthesupportbeam.

HHCompact Air Handling Units | 5
Lifting prohibited
Thispictogramshowsthatnohorizontaltransportdevices
mustbeplacedunderthisframesection,suchaspallet
liftersortheforksofforklifttrucks.Itisalsoforbiddento
placeliftingdevicesfortransportandstorageunderthis
frame element.
Earthing
ThispictogramindicateswheretheAHUcanbeearthed
andisononeofthesupportbeamsbeneaththecasingin
thefansection.Ifaunitconsistsofseveralsections,only
onesectionneedstobeearthed,providedthesectionsare
connectedinthecorrectway.
• TheelectricalcomponentsintheAHUmustbeearthed,
exceptforcomponentswithdoubleinsulationand/or
componentswithasupplyvoltagebelow50V.
• Theelectricalcomponentsmustbeinstalledin
accordancewithnationalandlocalregulations.
Rotating parts
Thispictogramindicatesthattherearerotatingpartsbehind
thisaccesscover,doororpanelwhichmaycauseinjury.
Thecomponentsthatincluderotatingpartsarethefanand
heatrecoverywheel.Iftherearespecialcustomer-specic
componentsbehinddoors,accesscoversorpanelsthat
includerotatingpartsandposeapotentialrisk,thisisalso
indicatedbythispictogram.
Hot surfaces
Thispictogramindicatesthattherearecomponents
behindthisaccesscover,doororpanelthatcancause
seriousburnswhentouched.Thesurfacesthatmaybe
hotaretheheatersurfaces.Iftherearespecial
customerspeciccomponentsbehinddoors,accesscoversor
panelsthathavehotsurfacesandposeapotentialrisk,
thisisalsoindicatedbythispictogram.
Electrical voltage
Thispictogramindicatesthatthereareelectrical
componentsbehindthisaccesscover,doororpanel
thatmaybedangerousfortheuser/installer.Only
qualiedpersonnelispermittedtocarryoutworkon
thesecomponents.Forthisworktheregulationsofthe
applicableinternational(e.g.IEC61557,EN50110and
ES 59009) and national (e.g. BS 7671) standards must be
observed.Thepictogramisattachedtotheaccesscover
fortheelectricheatercontrolbox.
Central data
ThislabelcontainsthedatafortheAHU,suchasorder
number,positionnumberetc.Thelabelisnormallylocated
ontheaccesscoverorthedoorofthefanassembly.Ifthe
AHUconsistsofseveralparts,eachpartmusthavealabel
withtherequireddata.
Opening the fan door
Thispictogramispositionedontheoutsideofthedoor
oraccesscoverofthefanassembly.Thispictogram
warnsthatthefanmusthavebeenswitchedoffand
deenergisedforaminimumoftwominutesbeforethe
doororaccesscoverisopened.Thispictogramalso
indicatesthattransportbracketsmustberemovedbefore
thefanisstartedup.
Systemair B.V.
Zanddonkweg 7a
5144 NX Waalwijk
The Netherlands HHCompact

6 | HHCompact Air Handling Units
! Waarschuwing !
Voor openen deuren, ventilator
uitschakelen, spanningsloos
maken en uit laten lopen
(minimaal 2 minuten).
Transportbeugels
Verwijder transportbeugels voor
opstarten ventilator.
! Warning !
Before opening the doors, switch
off and deenergise the fan and
allow it to run down
(minium 2 minutes)
Transport brackets
Remove transport brackets before
starting up the fan.
! Attention !
Avant ouverture des portes, le
ventilateur doit être déconnecté
et avoir eu le temps, de s’arrêter
completement
(2 minutes minimum)
Fixations de transport
Retirer les xations de trans-port
avant la mise en route.
! Gefahr !
Vor Öffnen der Türen den
Ventilator abschalten, span-
nungslos machen und zum
Stillstand kommen lassen
(mindestens 2 Minuten warten).
Transportsicherungen
Transportsicherungen vor der
Inbetriebnahme demontieren.
200034906
Other warning labels
! Waarschuwing !
Vervuilde lters zijn brandbaar.
! Warning !
Polluted lters are inammable.
! Attention !
Les ltres encrassés peuvent être
inammables.
! Gefahr !
Verschmutzte Filter sind leicht
entammbar.
200034907
! Waarschuwing !
Na het uitzetten van de
elektrische verwarmer moet de
ventilator nog
minimaal 5 minuten draaien.
! Warning !
After switching off the electric
heater the fan must continue to
run for at least 5 minutes.
! Attention !
Après la déconnexion de la
résistance électrique, le venti-
lateur doit continuer à tourner
pendant au moins 5 minutes.
! Gefahr !
Nach Abschalten der
Elektroheizung muss der Ventilator
noch mindestens 5 Minuten
weiterlaufen.
200034908
CAUTION: All doors and access covers must be closed
beforestartinguptheAHU.
Lifting and transport
AninstructionattachedtotheAHUdescribesthe
proceduresthatmustbefollowedforliftingandtransport.
Thefollowingchaptercontainsfurtherdetails.
1.4 - Disposal of parts/materials
• Thepackagingmaterialmustbedisposedofina
responsiblemannerandinaccordancewithlocal
regulations.
• Componentsthatarereplaced,mustbedisposedof
as described above.
Transport and lifting instructions
2.1 - General
TransportandliftingoftheAHUmustalwaysbein
accor-dancewiththeinstructionsbelow.Ifthese
instructionsarenotobserved,theunitmaybeirreparably
damaged,andpeopleintheimmediatevicinityofthe
unit are endangered. Systemair B.V. does not accept
anyresponsibilityiftheseinstructionsarenotobserved.
Transportandliftingmustbecarriedoutbyqualied
personnel.TheAHUmustonlybeliftedwithliftingbars
suppliedbySystemairB.V.(boxprole30x30x4mm,
quality52).Liftingmustbecarriedoutinaccordancewith
localregulationsandwiththehelpofcertiedliftingaids.
Only one set of lifting bars is supplied per order/position
numberperunitwidth(ifordered).Theseliftingbars
aresuitableforsingleuseandonlyforthepartsofthis
order/positionnumber.Theliftingbarsarecertiedbyan
authorisedpersonusingatypetest.
2.2 - Transport and storage
Duringtransportandstoragetheairhandlingunitmust
onlybesupportedunderthedesignatedliftingpoints.
Supportingandliftingunderthecrossbeamsisprohibited.
Thisisindicatedonthecrossbeamwiththefollowing
label.
2.3 - Roof edge protection during transport (outside
installation)
Roof edge transport protection
Duringtransportbytrucktheunitsareattachedtothe
loadingsurfacewithtieropes,pulledacrosstheunit
towardsthesideedgesofthetruck.
Toprotecttheroofedgeonoutsideunitsthatarewider
than1500mm,protectionplatesareaddedinplaceof
thetieropestopreventdistortionoftheroofedge.

HHCompact Air Handling Units | 7
2.4 - Ofoading and hoisting
DependingonthedimensionsoftheAHUandthe
situationonsite,theAHUsaresuppliedinpreviously
agreed transport sections.
Beforeproceedingwiththetransportandinstallation
ofthecasingsections,alwaysconsulttheapplicable
dimensionaldrawingsthatgivethedimensionsand
weightsofthesections,aswellastheinstallation
sequence.Theweightisgivenoneachtransportsection.
Eachtransportsectionisequippedwithasubframewith
fourliftingpoints.Thesepointsaremarkedbythelabel
shownbelow.
Forofoadingaswellashoistingliftingcablescanbe
attachedtotheliftingbars.Evenlypositionedspacerbars
shouldbeusedbetweentheliftingcablestoprevent
damagetothetopoftheunitandensurethatnoexcess
pressureisappliedtothesidepanels.Forhoistingplease
ensurethattheweightisevenlydistributed.
TheAHUmustnotberaisedunderthecrossbeamsduring
liftingormoving.Thisisindicatedbythelabelbelow.
2.5 - Horizontal transport
Forhorizontalmovementpalletliftersortransportskids
canbeplacedundertheinstallationframeorunderthe
liftingbars.Itisimportantthatthesesupportthelifting
points.Atnotimeshouldthecrossbeamsattheendsof
theunitsectionsbeusedforjackingortrackingtheAHU.
FOR HORIZONTAL TRANSPORT ALWAYS PROVIDE SUPPORT
UNDER THE LIFTING POINTS.Theuseofbarsasrollerscan
resultindamagetotheinstallationframe.
2.6 - Storage
ThepackaginginwhichtheAHUissuppliedcancause
condensationtobeformedbetweenthepackagingand
theAHU,iftheunitisstoredinanunconditionedplace.
IftheAHUisnotimmediatelyuseditisrecommendedto
storeitinaconditionedlocationon-site.IftheAHUiskept
outsideforashortperioddirectsunradiationmustbe
avoided.
Ifthefansareshutdownforalongerperiod(longerthan
threemonths)bearingdamagecanoccur.Toprevent
thisitisrecommendedtoloosenthebelttensionorto
temporarilyremovethefanbelts.Whenthefansare
re-startedthebelttensionmustberesettothespecied
tension.Controlledrotationofthefanimpellercanalso
preventthistypeofdamage.Thisisalsorecommended
for direct-drive fans.
2.7 - Assembly
Fortheassemblyofourunitspleaserefertoour
instructionmanual“Mountinginstructions”.
2.8 - Schematic diagram of an air handling unit with
controls
ThethreeversionsoftheHHCompactwithheatrecovery
andcontrolareshowninthefollwoingpagesinschematic
diagramswithashortdescription.Thedrawingsinthis
documentareforinformationonlyandshowthevarious
versions.Theydonotincludepossibleexternalsensorsor
controldevices.TheairowdirectionshownisfromLEFT
to RIGHT.
Thedimensionsgiveninthedrawings(HandW)refer
totheoutsidedimensionsoftheAHUcasing(excl.
connections and additional components). Dimension
W1ministherequiredserviceclearanceinfrontofthe
AHU.W1recistherecommendedserviceclearancein
frontoftheAHUtoreplacecomponents

8 | HHCompact Air Handling Units
Legend
A. Exhaustairdamper
B. Outdoorairintakedamper
C. Electricpre-heater(hotwater)
D. Supplyairlter
E. Extractairfan
F. Control panel
G. Face/bypass damper
H. Counter-owplateheatexchanger
I. Supply air fan
J Exhaustairlter
K. Electricreheater(hotwater)
L. Coolingcoilwithchangeover
M. Extractairdamper
N. Supply air damper
Dimensions
HHCompact C
Dimension in mm
H W W1min W1rec
0405 960 738 600 780
0506 1120 898 750 940
0606 1120 1058 900 1100
Legend
1. Actuator,outdoorairdamper
2. Pressuresensor,extractairfan
3. Frequencyconverter,extractairfan
4. Actuator,face/bypassdamper,plateheatexchanger
5. Frequencyconverter,supplyairfan
6. Pressuresensor,supplyairfan
7. Actuator,extractandsupplyairdamper(2x)
8. Maindisconnectswitch(supply),electricheater
9. Solidstaterelay,electricheater
10. Fuses,electricheater
11. Pressureswitch,supplyairlter
12. Mainsupplyconnection,controlpanel,electricheater
13. MaindisconnectswitchAHU(excl.electricheater)
14. Connection terminals
15. Pro Dialog control
16. Reset button
16. Connection terminals
17. Temperaturesensor,airintake
18. Relay
19. Temperaturesensor,extractair
20. Pressureswitch,extractairlter
21. Frostprotectionthermostat,heatingcoil
22. Temperaturesensor,DXcoilinlet
HHCompact C with high-efciency counter-ow plate heat exchanger - Sizes 0405, 0506 and 0606

HHCompact Air Handling Units | 9
HHCompact R with high-efciency heat recovery wheel - Sizes 0606, 0707, 0808, 0909, 1010, 1111, 1212, 1412
and 1416
Legend
A. Exhaust air damper
B. Outdoor air intake damper
C. Electric pre-heater (hot water)
D. Supply air lter
E. Extract air fan
F. Control panel
G. Motor, heat recovery wheel
H. Heat recovery wheel
I. Recirculation damper
J. Supply air fan
K. Extract air lter
L. Electric reheater (hot water)
M. Cooling coil with changeover
N. Supply air damper
O. Extract air damper
Dimensions
HHCompact R Dimension in mm
H W W1min W1rec
0606 1120 1058 900 1100
0707 1280 1218 700 1260
0808 1440 1378 700 1420
0909 1600 1538 700 1580
1010 1760 1698 700 1740
1111 1920 1858 700 1900
1212 2080 2018 700 2060
1412 2080 2338 700 2380
1416 2720 2338 700 2380
Legend
1. Actuator,outdoorairdamper
2. Pressuresensor,extractairfan
3. Frequencyconverter,extractairfan
4. Actuator,recirculationairdamper
5. Frequencyconverter,supplyairfan
6. Pressuresensor,supplyairfan
7. Actuator,extractandsupplyairdamper(2x)
8. Maindisconnectswitch(supply),electricheater
9. Solid-staterelay,electricheater
10. Fuses,electricheater
11. Pressureswitch,supplyairlter
12. Controller,heatrecoverywheel
13. Mainsupplyconnection,controlpanel
14. Maindisconnectswitch(excl.electricheater)
15. Connection terminals
16. Pro-Dialog control
17. Reset button
18. Temperaturesensor,airintake
19. Temperaturesensor,extractair
20. Pressureswitch,extractairlter
21. Relay
22. Frostprotectionthermostat,heatingcoil
23. Temperaturesensor,DXcoilinlet
24. Temperaturesensor,supplyair

10| HHCompact Air Handling Units
Legend
A. Outdoorairintakedamper
B. Extractairdamper
C. Electricpre-heater(hotwater)
D. Supplyairlter
E. Extractairlter
F. Recirculationdamper,plateheatexchanger
G. Plateheatexchanger,incl.face/bypassdamper
H. Control panel
I. Supply air fan
J. Extractairfan
K. Electricreheater(hotwater)
L. Coolingcoilwithchangeover
M. Supply air damper
N. Exhaustairdamper
Legend
1. Actuator,outdoorair,extractairdamper(2x)
2. Actuator,face/bypassand/orrecirculationairdamper,plateheat
exchanger
3. Frequencyconverter,extract/supplyairfan(2x)
4. Pressuresensorsupply/extractairfan(2x)
5. Actuator,supply/exhaustairdamper(2x)
6. Maindisconnectswitch(supply),electricheater
7. Solid-staterelay,electricheater
8. Fuses,electricheater
9. Pressureswitch,supplyairlter
10. Pressureswitch,extractairlter
11. Temperaturesensor,airintake
12. Temperaturesensor,extractair
13. Relay
14. Pro-Dialog control
15.  Mainsupplyconnection,controlpanel
16.  Maindisconnectswitch,AHU(excl.electricheater)
17. Connection terminals
18. Reset button
19.  Frostprotectionthermostat,heatingcoil
20.  Temperaturesensor,supplyair
Dimensions
HHCompact P Dimension in mm
H W W1min W1rec
0405 960 738 600 780
0506 1120 898 750 940
0606 1120 1058 900 1100
0707 1280 1218 700 1260
0808 1440 1378 700 1420
0909 1600 1538 700 1580
1010 1760 1698 700 1740
HHCompact P with cross-ow plate heat exchanger - Sizes 0405, 0506, 0606, 0707, 0808, 0909 and 1010

HHCompact Air Handling Units | 11
Checklist of start-up check points
3.1 - Checklist of start-up check points
Beforecommissioningtheunit,checkallfunctionsand
associatedcomponents,usingthechecklistbelow.
Thetableshowsageneraloverviewoftheoperations
requiredtofacilitatetheinstallationoftheAHU.
Thefollowingpagesgiveamoredetaileddescriptionof
theindividualcomponents
CAUTION:BeforestartinguptheAHUensurethatthe
componentshavethecorrectconnectionvoltageand
connecttheminaccordancewiththeregulations.The
doorsandaccesscoversmustbeclosedandtheAHU
mustbeearthed.
Start-up check points
Function Components Check points Start-up
General All functions Remove obstacles and loose debris from compartment
All functions Check for possible condensate and if necessary dry the parts
Indoor installation/
outdoor installation
Internal and external panels Damage
Internal and external panels Damage
Joints Cracks
Doors/access covers Must be closed and locked before start-up
Flexible connections Correct installation
Earthing Correct earthing in accordance with regulations
Roof covering (outdoor installation) Check if roof is completely watertight
Dampers Correct operation
Blades fully closed and at zero position
Actuators Correct operation
Check rotation direction
Actuator end position same as damper end position
Filters Correct lter type
Are the lters correctly installed
Pressure differential gauge Correct operation
Pressure differential switch Correct operation/set-up
Heaters Hot-water coil Correct connections
Air vent the coil
Leakage
Frost protection thermostat connected
Electric heater Check heater earth
Check hatch earth
Correct fuse size
Check wiring diagram
Check for possible condensate and if necessary dry the heater
Coolers Chilled-water coil Correct connections
Air vent the coil
Leakage
Droplet eliminator Correct alignment
Drain trap Correct connection
Heat recovery wheel Rotor Check rotation direction
Seal Correct seal towards wheel
Drive Check connection voltage
Correct connection
Check current in all phases
Drive belt Check tension
Rotation monitor Correct connection
Controller Correct connection
Plate heat exchanger Damper (if used) Correct operation
Actuator (if used) Correct operation
Syphon trap Correct connection
Droplet eliminators (if used) Bent ns
Fan Transport protection brackets Remove
Fan housing and fan compartment Remove obstacles and loose debris from the fan and fan compartment
Fan compartment, fan, motor, frequency
converter
Check for possible condensate and if necessary dry the parts
Impeller Check rotation direction
Motor Check connection voltage
Correct connection
Check current in all phases
Drive belt Check tension
Flexible connections Correct installation
Operating switch Check connection
Ensure switch is locked off during checks
Pressure switch/sensor Operation
Silencer (duct silencer) Damage of the top layer
Check for air-tight connection at the correct opening
Is the duct silencer sufciently supported
Frequency converter Connections Correct connection/complies with EMC
Frequency converter Check for possible condensate and if necessary dry the converter
Voltage Check connection voltage
Settings Check correct settings
Phases Check voltage in all phases
Lighting Lamp Check connection voltage
Switch Check connection
Control panel Components Check for possible condensate and if necessary dry the components
Power supply Check power supply voltage
Check neutral
Correct earthing in accordance with regulations
Power supply with correctly sized fuses
External sensors/control devices Connect according to wiring diagram
Alarms Connect to BMS or external panel
Controller Parameters Set all specic project parameters

12| HHCompact Air Handling Units
Start-up instructions
4.1 - Casing
Theunitdata,suchasordernumber,positionnumberetc.
isgivenonthenameplate.
4.1.1 - Casing panels
ChecktheAHUpanelsforanydamage.Anydirtorstains
mustberemovedfromthesurfacetopreventpossible
long-termdamage.Buildingdebrisleftontheroofof
units installed inside and outside must be removed. Dirt
canberemovedwithwaterandamildhouseholdsoap
solution.Damagecanberepairedbythoroughlycleaning
theaffectedsurface,thentreatandpaintasnecessary.If
applicablecheckthesealingjointsandrepairifrequired.
4.1.2 - Doors and access covers
Checktheoperationofdoorhandles,locksandmovement
ofthehinges.Checkifthedoorclosure(ontheinsideof
thedoor)istightlytted,sothattherearenoexcessive
airleaksatthedoors.ForoutsideinstallationoftheAHU
checkthestormcord.Forthesectionsthatareunder
pressureitisrecommendedtoorderadoorlockwithan
pressure safety device.
CAUTION:Doorsandaccesscoversmustalwaysbeclosed
beforestartingtheunit.
4.1.3 - Flexible connections
• Checkthatallexibleconnectionsarermlyattached
totheAHU.Ifnecessary,tightenloosescrews.
• Thestretchedlengthofasingle-skinexible
connectionis130mm,butaexibleconnectionmust
NOTbeinstalledstretchedbetweentheAHUand
theduct.Onceinstalledtheoperatinglengthofthe
exibleconnectionmustbe100mm.
4.1.4 - Earthing
EnsurethattheAHUhasbeenearthedcorrectlyandin
accordancewithlocalregulations.Alabelonthesupport
frameindicateswheretheunitshouldbeearthed.
4.1.5 - Connected ducts
Therearecornerframesattachedtoallopeningstobe
connected.Thesecornerframesallowconnectionofthe
airducttotheAHU.
• ItisrecommendedtouseEuroproleconnections
(typeE30)atthecornerframeaswellasattheduct
to be connected.
• Europroleconnectionsareavailableinxedlengths
andcanbecuttotherequiredlengthwithasaw.
Theseprolescaneasilybeplacedoverthecorner
frame.Allowforamaximumproleheightof30mm,
sothatductsthatarepositionedoneabovetheother
can be installed correctly.
• Thefourcornersbetweentheprolescanbe
completedwithacornerpiece(typeH30).
• Theproleatthecornerframecanbeattachedto
theproleontheductusingadriveslip(typeSR).
• Attachingself-adhesivetapebetweenthetwo
prolesensuresanair-tightseal,asshowninthe
drawingbelow.
Legend
1. AHU
2. Duct connection
HHCompact
Systemair B.V.
Zanddonkweg 7a
5144 NX Waalwijk
The Netherlands

HHCompact Air Handling Units | 13
• Tobeabletomaketwoopeningsoneabovethe
otherthecornerframesofthetwoopeningshavea
differentlengthsothatthereisalwaysenoughspace
toplaceandattachtheproles.Usingthedriveslip
meansthatthereisnoneedtousescrewsinthe
limitedspacebetweenthetwoductsthatareone
abovetheother,asshowninthedrawingbelow.
abovetheother,asshowninthedrawingbelow.
Legend
1. AHU
2. Duct connection
• Thecornerframehasalengthof32or72mmand
extends22or62mmbeyondtheexternalAHU
dimension,asshowninthedrawingbelow.
Legend
1. AHU
2. Duct connection
• Theexibleconnection,includingtheinstalledcorner
frame,extends122or162mmbeyondtheexternal
AHUdimension,andadamperset152or192mm,as
showninthedrawingbelow.
Legend
1. AHU
2. Flexibleconnectionordamper
3. Duct connection
(single-skinexibleconnection-±30mmpresst)
• Thecombinationofexibleconnectionsanddampers,
includingtheinstalledcornerframe,extends252
or292mmbeyondtheexternalAHUdimension,as
showninthedrawingbelow.
Legend
1. AHU
2. Damper
3. Flexibleconnection
4. Duct connection
(single-skinexibleconnection-±30mmpresst)
4.1.6 - Outdoor air intake
• Ensurethattheairintakeductiscorrectlyconnected.
Highairvelocitiesmustbeavoided,andnorain
dropsshouldgetintotheduct.Thisispreventedby
installingrainprotectionairintakegrilles(Caution:
Themaximumairvelocityforthegrilleisasgivenby
thesupplier).Therearairintakeductmustbesizedto
avoidhigherthanallowableairvelocitiesinthegrille.
Highairvelocitiesintheopeningscanalsobecaused
bywindattacksatoneoftheopenings.
Ifthesecanbeexpectedfortheinstallationor
geographicallocation,trytominimisethemwith
partitions.Ifthereisanypossibilitythatrainwater
canbedrawnin,dropleteliminatorsarettedwitha
suctiongrilleintheoutsideairduct.
• Apre-heaterforthelterscanbeinstalledtoprevent
mistcausingthelterstobecometoowet.Thepre-
heaterwillreducetherelativehumidityoftheair.
Connection of the outdoor air intake duct
IftheheaterisnotttedinAHU,itmustbettedin
theoutsideairduct.
Toconnecttheoutdoorairintakeducttoaunitthatis
installedinsidewerecommendthefollowingprocedure:
• Connecta500mmlongadapterpiecetothecorner
frameoftheairhandlingunit.
• Insulatetheinsideofthecompleteadapterpieceup
totheunitpanel.
• Insulatetheoutsideoftheadapterpiecesothatthere
isa250mmoverlapbetweeninsideandoutside
insulation.thereisa250mmoverlapbetweeninside
and outside insulation.

14| HHCompact Air Handling Units
• Theremainderoftheadapterpieceneedstobe
insulatedontheoutside,asshowninthedrawing
below.
Legend
1. AHU
2. Duct connection
Ifadamperisinstalledontheunititisrecommendedto
insulateuptotheunit(overthedamper).Thedampercan
causecondensationtoformontheunit.
4.1.7 - Assembly and placement of the air handling unit
Ensurethattheoorintheroomwheretheunitis
installedisevenandwaterproof.Thejointsbetweenthe
partsmustbecoveredwiththesealingtapeprovided.
Thesectionscanthenbeplacedinthecorrectorder.Place
thesectionsascloseaspossibletogetherandensurethat
theycanbemoved.Usingasupport,pullthesections
towardseachotherwithapull-rope.Checkifallparts
arewatertightandifnecessaryslidespacersunderthe
supportwhererequired(seealsochapter2).Thenattach
theprolessuppliedtothejoint.Theroofofunitsinstalled
outsidemustbesealedsothatnowatercanleaktothe
inside.Alwaysattachaunitinstalledoutsidetotheoor
ofthesupportframe,toensurethattheunitcannotmove
orfall.(taketheforceofthewindintoaccount).Forunits
installedinsidepleasemakesurethattheunitcannot
movefromitssupportpoints.Ifnecessary,theunitmust
beattachedtothesupport.
Foradetaileddescriptionoftheassemblypleasereferto
theinstructionmanual“Mountinginstructions”
4.1.8. Air contamination
Iftheexhaustandoutdoorairintakeopeningsareclose
toeachotherthereisariskofaircontamination.To
reducecontaminationtheairmustberareed.Todo
thiscorrectly,theairvolume,thehorizontalandvertical
distancetothetwoopeningsandthepositionofthetwo
openingsinrelationtoeachothermustbetakeninto
consideration(istheoutdoorairintakelowerorhigher
thantheexhaustairopening).
Itmaybenecessarytopositionthetwoopeningsfurther
apart,usinganextrapieceofductattheoutdoorair
intakeopening.Iftheunitsareinstalledoutside,thispiece
ofductshouldbeplacedbetweentheairhandlingunit
andthepre-installedsuctioncap(ifused).Thepieceof
ductingmustalwaysbesupportedinanappropriateway
4.1.9 - Condensation in or on the AHU
Condensationcanformontheinsideandoutsideofthe
AHU.Thisdependsontheinstallationlocation(indooror
outdoor),temperatureandrelativehumidityinsideand
outsidetheAHUandthethermalbridgefactor(theTB
value)oftheAHU.AlwaysselectanAHUwithathermal
bridgefactorthatwillnotleadtocondensationatthe
indoor and outdoor conditions. For units installed inside
thefollowingpointsmustbeconsidered:
• Openwatercollectiontanks(e.g.vapour/condensate
collectiontank).Thesemustalwaysbeunpressurised
andcoveredsothattherelativehumidityintheplant
room is minimised.
• Sufcientlyinsulatethecoldwaterandcondensate
linesuptotheAHU.
• Sufcientlyinsulateairductswithapossibleair
temperaturebelowthedewpointoftheairinthe
plantroom,asdescribedearlier.
Forunitsinstalledoutsideconsiderthefollowingpoints:
• Alwaysinsulateairductswithapossibleaircondition
(temperatureandrelativehumidity)withadewpoint
abovetheexpectedoutdooraircondition,toprevent
condensateformationintheduct.Itisrecommended
toinsulateallductsfromandtothebuildingto
minimiseheattransferandtoensuregoodcontrol.
• Afterconnectingtheductstothebuilding
immediatelyconnecttheunittothepowersupply,
switchitonandstartitup.Ifthisisnotdone
moisturewillmovefromthebuildingductstothe
AHU,causinganincreaseoftherelativehumidityin
theAHU.Atlowoutdoortemperatures(iftheAHUis
notoperating)thiscanleadtocondensationinthe
AHUandatthecontrolpanel.Thismustalwaysbe
prevented.
4.1.10 - AHU support
TheAHUincorporatesa62mmhighself-supportingbase.
IftheAHUisplacedonabaseoranexternalframe,the
followingdimensionsofthesupportundertheAHUmust
betakenintoconsideration.
Unitwidth:

HHCompact Air Handling Units | 15
Unitlength:
4.2 - Dampers
Whenworkingondamperregistersitispossibleforyour
ngerstobecometrapped.TheAHUmustbede-
energisedwhilecleaningthedamperbladesinorder
topreventunexpectedclosingofthedampers.While
connectingthecablingoftheservo,theAHUmustbede-
energisedinordertopreventtheconnectioncablesfrom
being live.
• Checkiftheactuatormotorisinstalledinaccordanc
withthesupplier’sinstructions.
• Checkifthecorrectanglehasbeenset.
• Checkifthedamperscloseproperly.
• Checkifthedampercanbesettothefullyopen
position.
• Checkoperationanddamperpositionofthespring
returnafterapowercut.Somedampersmustbe
open,othersmustbeclosed.
• Ensurethattheendpositionofthedamperisthe
sameastheendpositionoftheactuatorsothatthe
driveleverofthedamperisunloadedintheend
position.
Manual operation Actuator-assisted operation
AHU with control
Theunitissuppliedasstandardwithactuator(s).
• Open/closed
• Spring return
4.3 - Air lters
ATTENTION:WhenexecutingatestrunoftheAHU,the
airintakeandexhaustsidemayneverbeblocked.The
fasteningframeofthelterwillfailifthepressuredrop
overthelterisexcessive.
• Checkifthecorrectltershavebeeninstalled.
(air direction)
• Checkifthelterbagshavebeeninstalledcorrectly.
• Setpressureswitchesorsensors,ifused.
• Closetheinspectiondoor.
AHU with control
Thesupplyandextractairltersareequippedwitha
pressureswitchthatisconguredinseriesandnormally
closed.
4.4 - Heaters
4.4.1 - Hot water coil
• Alwaysusegloveswhilecarryingoutmaintenanceor
repairsontheheaterelementtopreventcuts.
• Alwayswearsafetyglasseswhileworkingonthe
heaterelement.
• Thensandthepipescanreachtemperatures
thatcancauseburns.Duringmaintenancework
alwayswearglovesthatprovideprotectionagainst
temperatures up to at least 70°C.
• ItisforbiddentodrillholesintheAHUtoprevent
damagetopipesandheater.
• Ifthesystemiscompressiontested,somewater
canremainintheelement.Thesystemmustcomply
withthePEDguideline.Compressiontestingisthe
responsibilityoftheinstaller.Alwaysde-aerate
thesystem.Ifthecabinetistemporarilynotinuse,
theremainingwatermustberemovedtoprevent
freezing.
• Onlyusethemediumforwhichtheelementwas
designed.Ifthemediumconsistsofamixtureof
water/glycoltakeaccountofthefactthatglycolisa
strongoxidisingagent.
• Ifonlywaterisusedasamedium,theelementmust
bedrained,iftheairreachesfreezingpoint.
• Avoidexcessivevibrationcausedbyexternaldevices
andtransmittedthroughthepipes.
• Theunitmustbede-energisedwhenthecollector
angesareremovedfromthepipes.
• Neverexceedthemaximumoperatingpressure.

16| HHCompact Air Handling Units
• Checktheconnectionsonthedimensionaldrawing.
• Ensurethatthecoilhasbeenfullypurged.
• Checkconnectionsforleakage.
• Ensurethatthefrostprotectionthermostathasbeen
correctly connected and set up.
• Thecoilcanbethelastorsecondlastcomponent
intheAHU.Provideaccesstothefrostprotection
thermostatviaaeld-installedinspectionhatchinthe
supply air duct.
• Ensurethattheheatercansupplyheattoprevent
frostformationwhenthefanisstarted.
CAUTION:Whenthecoilsaredrained,nowatermust
remaininthecircuitstopreventfreezingattemperatures
belowzero.
AHU with control
Thersthot-watercoilwithoutglycolinairowdirection
isequippedwithafrostprotectionthermostat.Thisisset
to a cut-out temperature of 5°C.
4.4.1.1 - Coils containing glycol
Ifcoilsarelledwithawater/glycolmixture,thisrequires
extraattention.
• Glycolcanreactviolentlywithstrongoxidation
solutions.
• Whenworkingonthecoil,alwayscheckwhich
mediumisused.Beforeaddinganythingtotheheat
exchangemedium,alwayscheckwiththeinstaller.
• Alwayswearsafetyglassesandgloves.
• Donotsmokeoruseanopename.
• Whensizingtheexpansiontanktakethehigherheat
transfercoefcientintoaccount,(±25%larger).
• Watertightsealsarenotalwaystightforwater/glycol
mixtures.Itisthereforebettertouseweld/solder
connections.
• Water/glycol causes increased sludge formation.
• Alwaysobservetheinstructionsoftheglycol
manufacturer.
• Checkthemixturetoensurethattheglycol
concentration(byweight)iscorrect.
4.4.2 - Electric heater
• Checkand/orconnecttheheaterinaccordancewith
localregulationsandthedatafromthemanufacturer.
• Ensurethattheterminalstripearthandthe
inspectionhatchearthhavebeenconnected.
• Checkforpossiblecondensate/moisture.Condensate
mayformintheperiodbeforetherststart-upof
theAHUasaresultofweatherchangeand/orhumid
airfromthebuilding.Removeallcondensatefrom
theconstructioncomponentsanddrytheelectrical
componentsusingwarm(dry)air(e.g.withadrier).
• Checktheconnectionvoltage.
• Checktheexistingamperageonallphases.The
valuesmustagreewiththedataontheheater
nameplate.
• Toensuresafeoperation,theheaterisequippedwith
athermostatwithautoreset(80°C)andahighlimit
thermostatwithmanualreset(128°C).
CAUTION:
• Theelectricheatermustbeconnectedasdescribed
inthetechnicaldataandshownintheconnection
diagramsupplied.Itisimportantthattherequired
machinecapacitiescomplywiththethicknessofthe
chosenconnectioncableandfusesofthepowergrid.
• Theinstallerisresponsibleforthecorrectconnection
andmachineoperation.
• DonotentertheAHU,iftheelectricheateris
switchedon.
• Beforeswitchingontheheaterensurethatthefan
rotates.Afterswitchingtheheateroff,thefanmust
continue to rotate for a minimum of 5 minutes.
• Ifnotallthestepsoftheelectricheaterhave
innitelyvariablecontrol,ensurethattheminimum
speedovertheheateris2m/s.Ifallstepshave
innitelyvariablecontrol,theairspeedoverthe
element can be reduced to 1.5 m/s.
• Thewarninglabelforelectricalvoltageisattachedto
theinspectionhatch.
• Theearthwarninglabelisattachedtotheinsideof
theheaterandtheinspectionhatch.
• Thewarninglabelfortheproceduretoswitchoff
theheaterisfoundonthedoororhatchofthefan
assembly.
! Waarschuwing !
Na het uitzetten van de
elektrische verwarmer moet de
ventilator nog
minimaal 5 minuten draaien.
! Warning !
After switching off the electric
heater the fan must continue to
run for at least
5 minutes.
! Attention !
Après la déconnexion de la
résistance électrique, le
ventila-teur doit continuer à
tourner pendant au moins 5
minutes
! Gefahr !
Nach Abschalten der
Elektroheizung muss der Ventilator
noch mindestens 5 Minuten
weiterlaufen.
200034908

HHCompact Air Handling Units | 17
AHU with control
IfanAHUwithcontrolincludesanelectricheater,this
musthaveaseparatepowersupply(400V±10%,3ph,
50Hz).Theelectricheatersupplymustbeprotectedby
acorrectlysizedfuse.Thecontrolensuresthecorrect
controlsignalandtheminimumairowacrosstheheater.
Theelectricheaterincludes:
• Amaindisconnectswitch
• Internal fuses (fast acting)
• Solid-staterelays(SSR)thatensuremodulating
control.TheSSRsusedswitchvianeutral.
TheproductcomplieswithresidentialEMCstandards
(61000-6-3)withthefollowingrestrictions,relatedtothe
ickereffect.
Only one heater
Heating
capacity
Current/
phase
Maximum
impedance Z
Declaration of the connection
condition to comply with
7.5 kW 11 A 0.309 Minimum power supply capability at the
building connection point to the public
network > 100 A per phase
9 kW 13 A 0.257
11 kW 16 A 0.210
15 kW 22 A 0.154 Maximum allowable power supply
network impedance < 0.15 Ohm
18 kW 26 A 0.129 Maximum allowable power supply
network impedance < 0.13 Ohm
19 kW 27A 0.122 Maximum allowable power supply
network impedance < 0.12 Ohm
24 kW 35 A 0.096 Maximum allowable power supply
network impedance < 0.10 Ohm
27 kW 39 A 0.086 Maximum allowable power supply
network impedance < 0.09 Ohm
35 kW 51 A 0.066 Maximum allowable power supply
network impedance < 0.07 Ohm
40 kW 58 A 0.058 Maximum allowable power supply
network impedance < 0.06 Ohm
45 kW 65 A 0.051 Maximum allowable power supply
network impedance < 0.054 Ohm
54 kW 78 A 0.043 Maximum allowable power supply
network impedance < 0.044 Ohm
* Maximum value at the point of common coupling (PCC) of the
machine and other electrical devices sensitive to the icker effect.
Thevaluesinthetableabovearecalculatedbasedonthe
followingassumptions
• Avoltagechangeasdenedbythestandard
corresponds to a cycle ON – OFF – ON
• For an interval period of 50 seconds
• Powersupply400V
• Safetymargin15%
4.4.3 - Electric heater in combination with changeover coil
ForanAHUwithcontrolanelectricheatercombined
withachangeovercoilcanbeused.Thechangeovercoil
providesprimaryheatingandcooling.Theelectricheater
isusedasaback-upheaterincasethereisnohotwater
availableforthechangeovercoilatademandforheating.
TheelectricheatermustNOTbeusedifthechangeover
coilisoperatingandtherequiredenteringtemperatureis
notachieved.
4.5 - Coolers
4.5.1 - Chilled-water coil
• Alwaysusegloveswhilecarryingoutmaintenanceor
repairsonthecoolerelementtopreventcuts.
• Alwayswearsafetyglasseswhileworkingonthe
cooler element.
• Thensandthepipescanreachtemperatures
thatcancauseburns.Duringmaintenancework
alwayswearglovesthatprovideprotectionagainst
temperatures up to at least 70°C.
• ItisforbiddentodrillholesintheAHUtoprevent
damage to pipes and cooler.
• Ifthesystemiscompressiontested,somewater
canremainintheelement.Thesystemmustcomply
withthePEDguideline.Compressiontestingisthe
responsibilityoftheinstaller.Alwaysde-aerate
thesystem.Ifthecabinetistemporarilynotinuse,
theremainingwatermustberemovedtoprevent
freezing.
• Onlyusethemediumforwhichtheelementwas
designed.Ifthemediumconsistsofamixtureof
water/glycoltakeaccountofthefactthatglycolisa
strongoxidisingagent.
• Ifonlywaterisusedasamedium,theelementmust
bedrained,iftheairreachesfreezingpoint.
• Avoidexcessivevibrationcausedbyexternaldevices
andtransmittedthroughthepipes.
• Theunitmustbede-energisedwhenthecollector
angesareremovedfromthepipes.
• Neverexceedthemaximumoperatingpressure.
• Checktheconnectionsonthedimensionaldrawing.
• Ensurethatthecoilhasbeenfullypurged.
• Checkconnectionsforleaks.
CAUTION:Whenthecoilsaredrained,nowatermust
remaininthecircuitstopreventfreezingattemperatures
belowzero.
• Checkifsiphoncoverandballhavebeencorrectly
installed.
• ThegaugepressuresiphonsuppliedbySystemairB.V.
is suitable for a gauge pressure of up to 1200 Pa in
theassociatedsection.
• Ifachangeovercoilissuppliedbyaheatpump,the
installationmustbedesignedtocompensateforthe
requiredheatduringthesystemheatpumpdefrost
cycleandtheheatcannotbedrawnfromthesupply
air.Otherwisethesupplyairtemperaturecannotbe
achieved.Duringtheheatpumpdefrostcycleitmust
bepossibletoaddenoughheatintothesystemthat
thedesiredenteringtemperature(heaterdesign
capacity)aswellastherequiredheatforheatpump
defrosting can be guaranteed.
• EnsurethattheAHUisinstalledhighenoughto
enablethesiphontraptoworkcorrectly.

18| HHCompact Air Handling Units
• Checkthatthesiphontrap(option)hasbeencorrectly
installed.Ensurethatthereisawatertightconnection
attheanglebendofthecondensatepantapbyusing
PTFEtape.Leaveapproximately32mmWITHOUT
tapebetweenthesiphoncasingandtheconnection
tothepipe,asthispartissealedbytherubberring
provided.
• ThenegativepressuresiphonsuppliedbySystemair
B.V. is suitable for a negative pressure of up to 800
Paintheassociatedsection.
• Checkthatthe(negativeorgauge)pressure
correspondstothesiphontypeinstalled.
• Theoutletofthesiphontrapconnectedtothedrain
must not be under pressure.
• Itisnotrecommendedtoconnectasiphonina
negativepressuresectionandasiphoninagauge
pressuresectionviaamanifoldthatisnotunder
pressuretothedrain.Insteadtwoseparatemanifolds
shouldbeused.
• Iftheeld-preparedsiphonisused,followthe
instructionsinthedrawingbelow.
Fillsiphonwithwater,ifthefanisswitchedoff
Negative pressure:
H1=maximumnegativepressureinthecoolersection(inmmWG)+50mm
H2=>1/2xH1
Gauge pressure:
H1=>maximumgaugepressureinthecoolersection(inmmWG)+50mm
H2 = 50 mm
PressureinkPa(100Pa=10mmWG)
• Checkifthedropleteliminatorafterthecoolerhas
been correctly installed.
• Checkifnshavebeenbentduringtransport.
• Correctlystraightenthens.
• Thenswillonlyworkcorrectlyafterseveraldaysin
dehumidicationmode.
• Start-upthecoolingcoilbyopeningtheshut-off
valvesandswitchingonthecontroller.Afterseveral
daysofcoolingoperationcheckthecondensatedrain
andoperationoftheplasticsiphon.
• Ifnecessarycleanthesiphon.
AHU with control
Thersthot-watercoilwithoutglycolinairowdirection
isequippedwithafrostprotectionthermostat.Thisis
settoacut-outtemperatureof5°C(thefrostprotection
thermostatisalsoonacoolingcoilthatisusedasa
changeovercoil).
4.6 - DX-coils
• TheDX-coilsaresuppliedwithoutrefrigerant.
• Thecoilsmustneverbepressurisedwithwater.
Theymustbesealedandpressurisedwithagaseous
mediumtopreventpollutionofthecoil.
• Aqualiedpersonshouldchargethecoiland
therestofthesystemwithasufcientamount
oftherefrigerant,asspeciedinthetechnical
specications.
• WhenconnectingtheDX-coiltothecompressor/
condensingunitalwaysfollowthesupplier

HHCompact Air Handling Units | 19
specicationsandtheinstructionsofthequalied
personnel.
• It is not recommended to connect several DX-coils to
one compressor/condensing unit.
• Itisbesttouseaninnitelyvariablecontrollerforthe
compressor/condensingunit.Ifthecondensingunit
hasinnitelyvariablecontrol,oneofthetemperature
controlsinthecontrollercanbeselected.
• Ifthecondensingunitdoesnothaveinnitely
variablecontrol,settheAHUcontrolforsupplyair
temperaturecontrol,andconnecttheDXentering
temperaturesensorinsteadofthesupplyairsensor.
Thedesired(room)temperaturemustthenbe
controlledbyaseparatecontrolleratthecondensing
unit.
Ifachangeovercoilissuppliedbyaheatpump,the
installationmustbedesignedtocompensateforthe
requiredheatduringthesystemheatpumpdefrost
cycleandtheheatcannotbedrawnfromthesupplyair.
Otherwisethesupplyairtemperaturecannotbeachieved.
Duringtheheatpumpdefrostcycleitmustbepossible
toaddsomuchheatintothesystemthatthedesired
enteringtemperature(heaterdesigncapacity)aswell
astherequiredheatforheatpumpdefrostingcanbe
guaranteed.
AHU with control
Iftheheatrecoverywheelissuppliedincludingarotor
controller,thismustbeincludedinthecentralcontrol
panel.Therotationsensoroftherotorispre-ttedand
mustbeconnected.Ifitisnecessarytoprotecttheheat
recoverywheelagainstfrostdamage,theheatrecovery
wheelmustbettedwithapressuresensororpulse/
pausemustbeactivatedorthequantityofairsupplymust
be reduced.
4.7 - Heat recovery wheel
• Ensurethattheheatexchangerfaceareaisnot
damaged.
• Checkthatthewheelisrotatinginthecorrect
direction.Thisisindicatedbyanarrowonthecasing.
• Checkifthewheelsealsarettingcorrectly.
• Checkifbelttensioniscorrect.
• Checkifthemotorandtherotationmonitorhave
beencorrectlyconnected(5mmplaybetween
sensoranddetectionpointonthewheel).
• Checkifthecontrollerhasbeencorrectlyconnected
andsetinaccordancewiththesupplierinstructions.
• Theinstructionsforthecontrollersupplierapply.
• Ensurethattherotorspeedhasbeencorrectlyset.
• TheHHCompactcondensationrotormusthavea
maximumspeedof10min-1;asorptionrotormust
haveamaximumspeedof20min-1.Refertothe
usermanualfortheheatrecoverywheelcontroller.
• Iftheairintaketemperatureisbelow-15°C,apre-
heaterisrecommendedfortheheatrecoverywheel
to prevent freezing.
Thefollowingwarningsignisshownonthepanel:
Rotating parts
AHU with control
Theheatrecoverywheelissuppliedwithrotorcontrol,
includedinthecentralcontrolpanel.Therotationmonitor
fortherotorispre-installedandconnected.
Ifrequiredtoprotecttherotoragainstfreezing,providea
pressuresensorfortheheatrecoverywheelorswitchon
pulse/pauseorreducethesupplyairvolume.
4.8 - Plate heat exchanger
• Ensurethatthefaceareaoftheheatexchangerisnot
damaged.
• Ifdampersareinstalled,alsocheckiftheactuator
motorhasbeeninstalledinaccordancewiththe
supplier instructions.
• Checkifthecorrectanglehasbeenset.
• Checkifthedampersclosecorrectly.
• Checkifthedamperscanreachthefullyopen
position.
• Beforeconnectingthesiphontrapandcheckingthe
dropleteliminator(ifinstalled),seechapter4.5.
• Iftheairintaketemperatureinacross-owplate
heatexchangerisbelow-10°C,apre-heateris
recommendedfortheplateheatexchangerto
prevent freezing.
• Iftheairintaketemperatureinacounter-ow
plateheatexchangerisbelow-5°C,apre-heater
isrecommendedfortheplateheatexchangerto
prevent freezing.
AHU with control
Theplateheatexchangerissuppliedwithamodulating
actuator(24V).Ifrequiredtheheatrecoverywheelcan
includeapressuresensortotprotecttheheatexchanger
against freezing.
4.9 - Recirculation damper
• Beforeoperatingthisdamperrefertochapter4.2
• Thedampermustalwaysbeclosedatapowerfailure
orwhentheunitisshutdown.
• If a recirculation damper is used a damper must be
• includedforboththeoutdoorenteringandexhaust
• air opening.
• Therecirculationdamperusedisdesignedforan
open/closed application.

20| HHCompact Air Handling Units
• TheAHUwithrecirculationdamperisthereforeNOT
suitableformodulatingoperationoftherecirculation
damper.Thisisduetothenon-guaranteeddamper
authorityandthefanpositionintheAHUrelativeto
therecirculationdamper.
AHU with control
Therecirculationdamperissuppliedwithanopen/closed
actuatorwithspringreturn(24V).Thecontrolusedfor
therecirculationdamperisanopen/closedcontrol.
4.10 - Fan
Remove after
transport
CAUTION:Theairowmaycausestationarypartstomove
(evenafanthatisswitchedoff)!
• Removethetransportbrackets.Thisisindicatedbya
labelonthedoor.
• Checkifthefancanmovefreelywithoutobstructing
theframe,exibleconnectionorwiring.
• Checkforpossiblecondensate/moisture.Condensate
mayformintheperiodbeforetherstAHUstart-
upasaresultofweatherchangeand/orhumidair
fromthebuilding.Removeallcondensatefrom
theconstructioncomponentsanddrytheelectrical
componentsusingwarm(dry)air(e.g.withadrier)
• Thisappliestobothmotorandfrequencyconverter.
• Checktheconnectionvoltage.
• Checkand/orconnectthemotorinaccordancewith
localinstructionsandthedataofthesupplier.
• Checkthedirectionofrotationoftheimpeller.The
directionisindicatedonthefanbyanarrow.
• Separatelymeasurethecurrentdrawoftheelectric
motorforallphases.Thevalueofallphasesmust
beapproximatelythesameandagreewiththe
nameplatedata.Setthemotorprotectiondeviceto
thenominalvalue.
• Themotordatashownisforanaltitudeofupto1000
m above sea level and an ambient temperature of
40°Cmaximum.
• Thedataforbelttype,belttension,numberofbelts,
sizeandpulleytypeisgivenonastickeronthefan
housing.
• Ifthefansareshutdownforlongperiods(longer
thanthreemonths),thebearingsmaybedamaged.
Topreventthisitisrecommendedtoreducethefan
belttensionortoremovethefanbeltstemporarily.
Whenthefansarerestartedthebelttensionhasto
beresettothespeciedvalue.Thistypeofdamage
canalsobepreventedbycontrolledrotationofthe
fan impeller
Thisisrecommendedfordirect-drivefans.
• Checkiftheexibleconnectioniscorrectlyinstalled.
• Ifused,checkthepressureswitchandsetthecorrect
• pressure.
• Checktheoperationofthemainswitch.
CAUTION:Whileworkingonthefantheswitchhastobe
lockedopen.
• Thewarningpictogramsonrotatingparts,electrical
voltageandopeningdoorsareattachedtothedoor.
! Waarschuwing !
Voor openen deuren, ventilator
uitschakelen, spanningsloos
maken en uit laten lopen
(minimaal 2 minuten).
Transportbeugels
Verwijder transportbeugels voor
opstarten ventilator.
! Warning !
Before opening the doors, switch
off and deenergise the fan and
allow it to run down
(minium 2 minutes)
Transport brackets
Remove transport brackets before
starting up the fan.
! Attention !
Avant ouverture des portes, le
ventilateur doit être déconnecté
et avoir eu le temps, de s’arrêter
completement
(2 minutes minimum)
Fixations de transport
Retirer les xations de trans-port
avant la mise en route.
! Gefahr !
Vor Öffnen der Türen den
Ventilator abschalten, span-
nungslos machen und zum
Stillstand kommen lassen
(mindestens 2 Minuten warten).
Transportsicherungen
Transportsicherungen vor der
Inbetriebnahme demontieren.
200034906
Ifthemachinehasstoppedduetoanunexpectedpower
supplyfailure,avoidsuddenre-starting.Thecontrol
system must include an appropriate protection device.
General data, fan motor
Insulation class motor : F
PTC trip temperature : 155°C
Connectionvoltage :3x230V/50Hz
  3x400V/50Hz
  3x690V/50Hz
Thefanmotormusthaveapowersupplyof230V,3ph,
50Hzor400V,3ph,50Hz.Theconnectionmustbe
madewithshortcircuitprotection(fuses)andathermal
motorsafetyswitch,matchedtothenominalcurrentof
themotor.TheACmotorcanalsobeprotectedagainst
overheatingbythreeseries-connectedPTCthermistor
fuses,installedinthewindings.Ifafrequencyconverteris