Komfovent DOMEKT ReCU 300/350/450VE(W)-B-AC/EC Manual

DOMEKT RECU 300/350/450VE(W)-B-AC/EC
Series Air Handling Units
Installation and Maintenance Service Manual
EN

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Content
Safety Requirements ..................................................................................3
Transportation ..................................................................................3
Brief Description of the Unit ..................................................................................5
Installation ..................................................................................6
Maintenance ..................................................................................9
Technical Information ................................... ............................................11
Ordering Key ................................................................................14

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Installation and Maintenance Service Manual
We reserve the right to make changes without prior notice.
1 Picture
Safety Requirements
• Toavoidaccidentsand/orunitdamage,onlyatrainedtechnicianmustcarry
out the connection.
• TheappropriatePersonalProtectiveEquipment(PPE)attireiswornrelativeto
the operation being carried out.
• Electricalequipmentisrated,connectedandearthedinaccordancewithCE
regulations.
Theairhandlingunitmustbepluggedintoanelectricaloutlet(withearth),whichisingoodorderand
corresponds with all requirements of electric safety.
Beforestartinganyoperationsinsidetheunit,makesurethattheunitisswitchedoff,andthepower
cable is unplugged.
• EarthmustbeinstalledaccordingEN61557,BS7671.
• The unit should be installed according to Installation and Maintenance Manual.
• Beforestartingtheunit,checkcorrectpositionofairlters.
• Service maintenance should be carried out only in conformity with the
instructionsspeciedhereinbelow.
• Ifmaincableisdamaged,onlymanufacturer,serviceteamortrainedtechnician
must change it in order to avoid accidents.
Transportation
Theairhandlingunitsarereadyfortransitandstorage(1Picture).Theunitispackedtopreventdamageofthe
externalandinternalpartsoftheunit,dustandmoisturepenetration.
The unit is packed to box after that corners of the air handling units are protected against the damage –
protectivecornersareused.Theentireunitiswrappedupinprotectivelm.Fortransitorstorage,unitsaremount-
ed on timber pallets. The unit is fastened to the pallet with polypropylene packing tape over protective corners.
Air handling unit ready for transit and storage

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Installation and Maintenance Service Manual
We reserve the right to make changes without prior notice.
2 a Picture
Forklifttruckorhandpallettruckcantransportairhandlingunitasitisshown(2a,bPictures).
Air handling unit transportation by forklift truck or hand pallet truck
2 a Unit is transported by hand pallet truck on a wooden pallet;
2 b Unit is transported by forklift truck on a wooden pallet.
The unit should beexamineduponreceipt,toensurethatnovisibledamagehas occurred during transit,
and the advice note checked to ensure that all items have been received. If damage or delivery shortages are
discovered,thecarriershouldbeimmediatelyinformed.AMALVAshouldbenotiedwithinthreedaysofreceipt,
withawrittenconrmationsentwithinsevendays.AMALVAcanacceptnoresponsibilityfordamagebyunloading
from carrier or for subsequent damage on site.
Iftheunitisnottobeinstalledimmediately,itshouldbestoredinaclean,dryarea.Ifstoredexternally,itshould
be adequately protected from the weather.
2 b Picture

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Brief Description of the Unit
• The air handling units are intended for ventilation of small and medium-sized spaces (eg. single fam-
ily houses, ofces, etc.), having operating ambient temperature and relative humidity. The unit is in-
tended to be installed in the kitchen or other domestic premises. Mineral wool is used for thermal insu-
lation and sound attenuation. Units cover panels are 25 mm thick.Asstandard,the unit isdesigned for
indoor placement. The operating temperature range for the unit is -300C ... 400C, outdoor air temperature.
Theair handlingunitisnottobeusedtotransportsolidparticles,evennotinareaswherethereisariskof
explosive gases.
• DOMEKTRECU300/350/450VE(W)-B(3Picture)seriesunitsareequippedwithaplateheatexchanger,
airlters,anelectricairheater,fansandautomationcontrolsystem,toensuresafeandefcientoperation
of the unit.
• Beforeyouopenthedoor,theunitmustbeswitchedoffandthefansmusthavebeengiventimetostop(upto
3minutes).
• The unit contains heating elements that must not be touched when they are hot.
• Tomaintainagoodindoorclimate,complywithregulationsand,toavoidcondensationdamage,theunitmust
neverbestoppedapartfromduringservice/maintenanceorinconnectionwithanaccident.
• Iftheunitisplacedinspaceswithhighhumidity,condensationmightoccuronthesurfaceoftheunitwhenout-
door temperatures are very low.
DOMEKT RECU 300/350/450VE(W*)-B-AC/EC Air Handling Unit Scheme
1. Drainage
2. Plate heat exchanger
3. Exhaustairlter
4. Supplyfan
5. Supplyairlter
6. Automationcontrolsystem
7. Exhaustfan
8. Electric air heater
Note: to reduce the noise level to the premises, it is recommended to install sound attenuators in the ducts.
Installation and Maintenance Service Manual
A. Outdoor intake
B. Supply air
C. Extractindoor
D. Exhaust air
E. By-pass – extraction without heat recovery
We reserve the right to make changes without prior notice.
3 Picture
ECB
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E
D
A
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3
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716
C
B
D
A
5
2
4
716
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CD
E A
8
A
ED
C
B
W* - Ducted DH water heater.

6We reserve the right to make changes without prior notice.
Installation
Unit Inspection
Beforeinstallingtheunit,inspectionmustbecarriedout.Unithasremovablepanelsfromitsbothsides(4Picture).
Allinternalunitcomponentscanbeextractedfrominspectionside.Afterchoosingdesiredinspectionside,itisne-
cessary to check if automatics box are positioned correctly. Automatics box are maintained from inspection side.
Picture4showsunitwithright-handinspectionside.Togetunitwithleft-handinspectionside,internalunitele-
mentsmustbeturnedround.Removebothunit’spanels,whichafterwardsmustbecounterchangedtohavepos-
sibilityofothersideinspection.Startwithautomaticbox(5Picture).Unplugcabelsbeforerotatingautomaticbox.
unplug
plug
Unscrewtheboltsinsideunittodismountautomationbox,afterthatitcanberotate.
Taking off the switch from the unit it is needed to take it apart from each other and check if the contacts are
fouled.
4Picture
5Picture
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Do not forget plug in the cabels into automation box.
Picture7showsunitfromright-handinspectionside.
Do not forget to put on elements for hanging before screwing on back panel.
The place for the unit should be selected with allowance for minimum access to the unit for maintenance and
serviceinspection.Theminimumfreespaceinfrontoftheinspectionpanelshouldbenotlessthan350mm.
Itisrecommendedtoinstalltheairhandlingunitinaseparateroom(8Picture).
We reserve the right to make changes without prior notice.
6Picture
7Picture
Rotate
Installation and Maintenance Service Manual

8We reserve the right to make changes without prior notice.
Unit brackets’ positions
Condensate Drain Connections
Allcondensatedrainconnectionsmustbecorrectlytrapped.Incorrecttrappingcanresultinoodingwithinthe
unitandconsequentoodingoftheimmediatearea.Fillthedraintrapwithwaterbeforestartinguptheunit.
All drain lines should be insulated where passing through any space where damage from condensation drip
might occur. If the unit is installed in unheated premises the condensate pipe should be heat-insulated and heated
with heating cable.
1. Screw
2. Wall plug
3. Hanging bracket 1
4.Hangingbracket2
5.BoltM5
6.Gasket
7.Selftappingscrew
8.L-shapebracket
9.WasherM5DIN9021
8 Picture
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3
5
6
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Installation and Maintenance Service Manual

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9 Picture
A condensate pipe and a drain trap
Final Inspection
Afterinstallationoftheunit,athoroughinspectionshouldbecarriedout.Thisshouldincludeinspectingthe
insideoftheunitandremovingdebrisandtools,whichmayhavebeenleftbehindbyonsitecontractors.Replace
anypanels,whichmayhavebeenremovedandcloseallaccessdoors,ensuringthatthedoorsealinggaskets
have not been damaged.
Maintenance
Before performing any inspection work, check whether the unit is switched off
from the electric power supply.
It is recommended to carry out routine maintenance of the air handling unit KOMFOVENT DOMEKT
RECU300/350/450VE(W)-B-AC/EC–4timesperyear.Extractingunitelements(see9Picture).Cablesmustbe
disconnectedwhenextractingautomationbox,plateheatexchanger,fans.
During inspection, the following operations should be performed:
1. Plate heat exchanger check. Inspection and dedusting of the plate heat exchanger is performed once per year
(itisremovedfromtheunit(10Picture)andblownwithanairblastorwashedwithtepidwater).
Note: plate heat exchanger may be replaced with summer cassette (for units without by pass), when recu-
peration is needless.
Plate heat exchanger cleaning.Ifplateheatexchangercleaningbycompressedairisnoteffective,itcan
bewashedwithsoapsuds(11Picture),orifneeded–usedegreasingsoakformetal(aluminum)cleaning.
Leaveplateheatexchangertodryinawarmplace.Itcanbemountedonlywhenitisabsolutelydry.
We reserve the right to make changes without prior notice.
8 a Picture
view 1
min.60mm
min. 30 mm
D*
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Plate heat exchanger cleaning
2. Fans check(onceperyear).Pollutedfansdecreaseefciency.
Beforeperforminganyinspectionwork, check whether theunitisswitchedoff
from the electric power supply.
 Fansshouldbecarefullycleanedwithtextileorsoftbrush.Donotusewater.Donotbreakbalance.Check
iffanfreelyrotatesandisnotmechanicallydamaged,ifimpellerdoesnottouchsuctionnozzles,fandoes
not spread noise and mounting bolts are screwed.
3. Air heater check.Checkifelectricairheaterisproperlyxed,wiresconnectionsarenotdamagedandheat-
ing elements are not bent. They can be damaged or bent due to uneven heat or uneven and turbulent air
direction.Checkifelectricairheaterisclearofunnecessarythingsandheatingelementsarenotclogged,
becausethiscancauseunpleasantsmellorintheworstcase–dustcanstartburning.Airowthroughthe
airheatershouldbegreaterthan1,5m/s.Heatingelementscanbecleanedwithhooverorwettextile.
4. Airltercloggingcheck.Changeairlterswhenairltercloggingisindicated.Werecommendtochange
ltersatleasttwiceperyear:beforeandafterheatingseason,ormore*.Filtersareonetimeused.Wedo
notrecommendcleaningthem.Stoptheairhandlingunitbeforechanginglters.
*Clogged lters unbalance ventilation system, air handling unit uses more power.
We reserve the right to make changes without prior notice.
10 Picture
11 Picture
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Installation and Maintenance Service Manual