Wijas PERFECT 7000 Installation and operating instructions

Pressurized water flow heater
PERFECT 7000, 8000, 9000
ASSEMBLY AND OPERATION
MANUAL

2
Table 1
Advantages of pressurized water ow heaters “PERFECT”:
Signicantelectricpowersavingcomparingtoaboiler
Instantandpermanentwarmwaterdelivery
Electronicpowerswitchprolongssignicantlyheater’slife
Possibilitytousetheheaterwithverylowwaterpressure(ca0,06MPa)
Thankstoinstalledelectroniccontrolsystemthemostunreliablemechanicalpartssuch
asmembrane,traditionalelectricalcontactsareeliminated.Signicantprolongationof
theappliancelifeandimprovedreliabilityisreachedinresult.
1. Application
PressurizedwaterowheaterPERFECTisdesignedforinstantdeliveryofwarmwater
tosanitaryequipmentsuchaswashbasins,sinks.Inordertoeconomicalusetheheater
shouldbeinstalledascloseaspossibletotheservedequipment.
Thisapplianceisfullydesignedtobeusedinmoistureenvironment.Howeversplashing
withwaterisprohibited.Maximumdeliveredwatertemperatureshouldnotexceed30ºC.
Oneshouldrememberthatheateroutputdependson:
itelectricpower;
waterstreamowingthroughtheappliance.Thebiggerow,thelowerwatertempera-
tureonexit(table1);
voltagedropinelectricalsystem.Forinstance:voltagedropby10%resultsinlowering
heatoutputby19%(table2).Voltagedropbelow340Vcausesblockageofappliance
powerswitchbyelectronicsystem;
deliveredwatertemperature.

Suppliedwatertemperature15ºC
Waterow [l/min] 2,5 3 3,5 4 4,5
Perfect 7000 [OC] 55 48 43 40 37
Perfect 8000 [OC] 60 53 47 43 40
Perfect 9000 [OC] – 57 51 46 43

3
Heaterpowerdependingonvoltageinelectricsystem
Table 2
CAUTION!
Power must be switched off before starting any work over installation,
opening cover or incline the installed heater!
The heater can only work in position showed on drawing No 1 below.
Starting the device in position other than proper one will result in dam-
aging a heating element and deprivation of guarantee.
Voltage [V] 400 390 380 370 360
Perfect 7000 [W] 7000 6650 6300 5989 5670
Perfect 8000 [W] 8000 7600 7200 6800 6480
Perfect 9000 [W] 9000 8550 8100 7650 7290
Fig.1
GOOD WRONG WRONG WRONG
2. Safety regulations
Heatercanonlybeinstalledbyauthorizedperson
Heatermustpermanentlybeconnectedtoelectricalsystemequippedwithearthing
connectoranddifferentialswitch
Heatercanonlyworkinpositionpresentedondrawing1
Donotexchangeearthingwirewithlivewire
Heatercanonlyworkusingperfectlyworkingsafetydevices
Heatermustnotbeinstalledinroomswheretemperaturedropsbelow0ºC
Applianceshouldnotbeinstalledinaggressiveordangerofexplosionenvironment

4
Heatercanonlybeusedwheninperfecttechnicalcondition
Waterandpowersupplymustimmediatelybeshutoffincaseofheater’sfailure
Allserviceandmaintenanceworkscanonlybecompletedwithpowerswitchedoff
Onlyoriginalsparepartscanbeusedforrepair
Heater’scovermustnotbetakenawaywhilepowerison
Avoidelectronicsystemtobesplashedwithwater
Incaseofheater’sdefectorimproperworkswitchoffpowerandshutoffwatersupply
usingstopping–suppressingvalve
Sprinkler(strainer)onwatertapdraintubeendshouldbecleanedregularly
Checkregularlypowersupplysystem(voltagedrop)includingconnectiontothemain
Waterowshouldbesuppressedinsuchmannerastollcomfortablewatertemperature
(watershouldnottobetohot–bewarechildren!)
Thisapplianceshouldnotbeusedbymentallydisabledpersons(aswellaschildren)
withoutsupervision
Donotallowchildrenuseorplaywithheaterindependently
3. Wiring system
Theheatercanonlybeusedpreviouslyconnectedtoearthingsystem.
Wiringsystemshouldbeequippedwithdifferentialswitch.
Minimumwirecrosssectionandfusevalueshouldbefoundaccordingtotable3.
Checkstateofwiringsystemandparticularlyterminalsbeforeheaterinstallation.
Measurevoltagedropunderloadafterconnectingheatertowiringsystem.
Fig. 2

5
4. Water system
Table 3
Typ Perfect
7000
Perfect
8000
Perfect
9000
Minimumwirecrosssection
[mm2]2,5 2,5 2,5
Recommendedfuse[A] 17,5 20 22,5
5. Assembly
CAUTION!
The device can only work in position showed on drawing No 1.
Trying to start the device in position other than proper one or without
water lter will result in damaging heating element and deprivation of
guarantee.
Do not screw connecting hoses using high power in order to avoid
thread damage.
Do not seal stub pipe thread with tow or Teon™ sealing tape.
Save electronic system against water splashing.
1. Applypatternonplacetheheaterwillbeinstalled.Markplacesfordrillingholesfor
anchoringpegsandcable. 
Cablecanbeconnectedtotheheaterbyopeninginrearwallorbybrakingthinplastic
partunderhousing(g.3and4).

6
Fig. 4
Fig. 5
2. Screwheateronawall.
3. Connectheaterinawayshowedong.6.Remembertotwaterlterasshowedon
g.5.Useexiblehosesdesignedforpressurizedsystemwithrubbergasket.Donot
exchangeheateroutlet(redcolour)withintake(bluecolour).
CAUTION! Do not screw
hose nuts too tight in
order to avoid thread
damage at heater’s pipes
ends. Water lter remov-
al results in guarantee
deprivation. Filter must
be installed according
to gure 5.
Fig. 3
GOOD WRONG

7
Fig. 6
Heater connection to tap assembly with hoses 3/8”
Fig. 7
4. Openwatervalveandcheckconnectionstightness.Incaseelectronicsystemissplashed
withwaterremoveitimmediatelyblowingwithcompressedair.
5. Openfullwaterowinordertoremoveairplugfromheatingelement.
6. Connectheatertothemainssupply.

8
7. Changewaterstrainerfortheonedeliveredwithheater
8. Adjustheateraccordingtochapter6.
9. Remembertocleanstrainerperiodically.
6. Adjustment
Caution!
Water temperature delivered by heater depends on water ow. The higher
ow, the lower temperature.
Too high water temperature can cause thermal protection device to stop
heater work.
Unlock by pressing thermal protection button.
1. Openwarmwatertap.
2. Reducewaterowwithcareusingsuppressing–shuttingoffvalveinordertoreach
watertemperatureca42ºC.
7. Water lter cleaning
1. Turnoffwaterinowtosuppressing–shuttingoffvalveanddisconnectfrompower
supply.
2. Disconnectexiblehosefromheaterintake.
3. Takeoutlter(usingsmallscrewdriver)–seeg.8.
Fig. 8
Caution!
Please check whether blue and red gaskets of pipes ends are properly
t to the heater’s casing after xing it on heater.

9
4. Removedirtfromlter.
5. Installlterintoheaterintakewithbasketbottomdown(Fig.9)
Fig. 9
6. Connectexiblehosetotheheater.
7. Openwatervalveandchecktightness.
8. Checkelectronicsystemwhetherisnotsplashedwithwaterbeforepowerswitching
on–ifso,blowitupwithcompressedairtoremovewaterfromelectroniccircuitboard.
9. Adjustaccordingtochapter6.
8. Cleaning sprinkler (strainer) of drain tube
1. Unscrewsprinklerfromdraintube.
2. Unscrewboltfromsprinkler.
3. Pushoutringsfromsprinkler.
4. Cleanupringsducts.
5. Reinstallsprinkler
9. Defects and troubleshooting
Water ow too low
– blockedwaterlter(cleanitoutaccordingtochapter7)
Heater does not start
– heaterinletexchangedwithoutlet
– waterowsuppressedtoomuch
– blockedwaterlter(cleanitoutaccordingtochapter7).
– waterpressuretoolow
– lackofpowerbecauseofblownfuse.
Heater does not warm up water but control lamp lights
– voltagetoolow(powersupplyinginstallationoverloaded)
– temperatureofenteringwatertoolow
– waterowtoohigh(adjustwaterowaccordingtochapter6)
Water temperature on heater exit to low
– waterowtoohigh(adjustwaterowaccordingtochapter6)
– temperatureofenteringwatertoolow
– highvoltagedrop(seechapter1,table3)
GOOD WRONG

10
Water temperature on heater exit too high
– water ow suppressed too much by control valve (adjust water ow according to
chapter6)
– blockedwaterlter(cleanitoutaccordingtochapter7)
– waterpressureinwatersystemtoolow
Heater is switching on and out automatically
– waterpressureoscillationinwatersystem
– waterowsuppressedtoomuchbyshutoff-suppressingvalve
Stepwise changes of water temperature on exit
– currentoscillationinpowersupplysystem
– changesofwaterowinresultofpressurechangesinwatersystem


11
10. Technical data
Typ Perfect
7000
Perfect
8000
Perfect
9000
Power[kW] 7 8 9
Currentintensity[A] 17,5 20 22,5
Voltage[V] 400 400 400
Minimumwaterowtoswitch
heateron[l/min] 2,1 2,4 2,8
Maximumwaterpressure[MPa] 0,65 0,65 0,65
Splashproongclass IP24 IP24 IP24
Minimumwaterresistivityat15°C 1300 1300 1300
11. Outt
1. Heater 1pc
2. Shuttingoff–suppressingballvalve1/2”–3/8” 1pc
3. Waterlter 1pc
4. Self–blockingpegØ6 2pcs
5. Patterntodrillholes 1pc
6. Sprinkler(strainer) 1pc