Mitsubishi Electric VL-350CZPVU-L-E User manual

Eng-1
English
2103876H46502
LOSSNAY HEAT RECOVERY VENTILATOR (RESIDENTIAL USE)
MODEL
VL-250CZPVU-R-E, VL-250CZPVU-L-E
VL-350CZPVU-R-E, VL-350CZPVU-L-E
VL-500CZPVU-R-E, VL-500CZPVU-L-E
Installation Manual For dealer/contractor
■Thisproductisforresidentialuse.
■Thisproductmustbecorrectlyinstalledtoensurethatitsperformanceandfunctionsareproperlydemonstrated
andtoensureitssafeuseandoperation.Beforeinstallation,pleasereadthisinstallationmanualthoroughly.
Beforeusingexclusivesystemcomponents,readtheinstallationmanualforthesystemcomponentsthoroughly.
■Forinstallationparts,besuretouseaccessoriesanddesignatedparts.Useofnon-designatedpartsmaybea
causeofmalfunction.
■Installationmustbeperformedbydealersandelectricalcontractors.Incorrectinstallationbythecustomermaybe
acauseofequipmentmalfunctionoranaccident.
■Electricalworkmustbeperformedbyaproperlyqualiedelectricianofthedealerorelectricalcontractor.
■Pleasenotethatenoughworkingspace(removethecover,replacethelter,etc.)isrequiredaroundtheproduct
formaintenance.
■Installtheproductindoor.
*ThegureshowsVL-350CZPVU-R-E
Contents
1.SafetyPrecautions ��������������2
2.OutsideDimensions �������������6
3.StandardInstallationExample �������� 12
3.1Installationexample ����������� 12
3.2Workingspace ������������� 13
4.InstallationProcedure ����������� 16
4.1Wallbracket �������������� 16
4.2MountingtheProduct ���������� 16
4.3FixingtheProduct ������������ 16
4.4ConnectingthePipes ���������� 17
4.5Drainpiping��������������� 19
5.ElectricalWork��������������� 20
5.1Standarduse �������������� 20
5.2Externaldeviceconnectionuse ������ 21
■Post-installationChecks ����������� 26
6.HowtouseController������������ 27
6.1Controllerbuttonfunctions �������� 27
6.2Menustructure ������������� 28
6.3«Mainmenu»screenandoperation ���� 29
6.4Commissioningmenu ���������� 29
6.5Functionsetting ������������� 45
6.6Errorlist ���������������� 48
6.7Trialoperation�������������� 48
7.ExplainingtotheUser������������ 50

Eng-2
1. Safety Precautions
WARNING
Prohibited
Do not install the product in hot places, in the direct sunlight and in smoky places.
Failuretoheedthiswarningmayresultinre.
Donot
disassemble
Do not modify or disassemble the product beyond that is necessary.
Failuretoheedthiswarningmayresultinre,electricshockorinjury.
Donotwet
Refrain from immersing in water or splashing the product with water.
Failuretoheedthiswarningcouldresultinshortcircuitorelectricshock.
Donotinstall
inbathroom
Do not install the product or the controller in a bathroom or other humid location.
Failuretoheedthiswarningmayresultinelectricshockorelectricleakage.
Besureto
ground
Make sure to install the ground wire.
Devicefailureandelectricleakagemaycauseelectricshock.
Follow
instructions
Use 220 to 240 V AC power.
Failuretoheadthiswarningmayresultinre,electricshockordamagetothecircuitboards.
For the outdoor air intake vent, choose a position where combustion gas or other similar exhaust air is not
sucked in and the vent is not buried by snow.
Inabilitytobringinfreshairmayresultinlackofoxygenintheroom.
Select a place which is strong enough to support the product, and install the product securely.
Injurycouldresultifpartsfall.
Electrical work must be carried out safely and reliably by a professional electrical contractor (properly qualied
electrician) in accordance with internal wiring provisions and electrical-equipment technical standards.
Poorconnectionandfaultyelectricalworkcouldresultinelectricshockorre.
Install an all-pole power supply isolator at the power supply side as per local electrical regulations. All
supply circuits must be disconnected before obtaining access to the terminal devices. Use the specied
cable size and connect the cables securely to prevent disconnection when they are pulled.
Ifthereisadefectintheconnection,thereisapossibilityofre.
Use the designated electric wires, and connect them securely so that they do not come loose.
Defectiveconnectionsmayresultinre.
When metal ducts penetrate through metal-sheeted wooden buildings or structures, install the product so
that there is no electrical contact between the metal ducts and the metal sheeting.
Electricleakagemaycauseignition.
Make sure to cover with the terminal block cover after electrical work.
Failuretoheedthiswarningmaycausedust,humidity,etc.toenter,resultinginelectricleakageorre.
Secure duct piping with commercially available xing bands, aluminum tape, etc. to prevent piping from
coming loose. Install outdoor piping from the product so that it is tilted at a downward pitch of at least 1/30
towards the outside.
Failuretoheedthiswarningmaycauserainpenetration,resultinginelectricshock/reorwaterdamageto
householdproperty.
Piping should be installed so that no load is applied to the pipe guide.
Failuretoheedthiswarningmaycausedampermulfunction.
If the product will not be operated for a long period of time after installation, make sure to turn o󰀨 the
circuit breaker.
Itcouldcauseelectricalshockbydeterioratedinsulationorrebytheelectricleakage.
Symbolsusedinthetextandonthemainunithavethe
followingmeanings.
Prohibited Donotinstallin
bathroom
Donotdisassemble Besuretoground
Donotwet Followinstructions
Thefollowingsymbolsindicatethedegreeofdangercaused
byincorrecthandlingoftheproduct.
WARNING
Incorrecthandlingofthe
productmayresultinserious
injuryordeath.
CAUTION
Incorrecthandlingmayresult
inminorinjuryorphysical
damagetothehouseor
householdgoods.

Eng-3
WARNING
Follow
instructions
For installation work parts, make sure to use only accessories and designated parts
Useofnon-designatedpartsmayresultinequipmentdamageoraccidents.
When using duct heaters (supply air preheaters, supply air after-heaters), make sure to use safety devices that
do not have self-return functions. Do not supply the duct heaters with electricity directly from the product.
Failuretoheedthiswarningmayresultinre.
When using duct heaters (supply air preheaters, supply air after-heaters) that do not have temperature
control functions, select duct heaters that have the appropriate capacity according to the airow passing
through the heaters.
Failuretoheedthiswarningmayresultinrebecausetheheaterswilloverheatiftheairowistoolittlecompared
tothecapacityofheaters.

Eng-4
CAUTION
Prohibited
Do not install the product at regions or locations that exceed the following operating conditions.
Iftheseoperatingconditionsareexceeded,dewcondensationwatermightdrip.
Outdoorairtemperature:-15to40
ºC
Areaaroundtheproductandambienttemperatureandhumidity:0to40 ºC 80%RHorlessandatabsolute
humidityorlesswherethedewpointtemperatureof12
ºC (20 ºC 60%RHorequivalent)isreachedunderthe
aboveminimumoutdoorairtemperatureconditions
Do not install the product at locations where the product is prone to be damaged from salt or hot springs.
Failuretoheedthiswarningmayresultinmalfunctionofproduct.
When installing the product, do not drop or throw the product, or subject the product to impact.
Damagetostructuresinsidetheproductmayresultinairorwaterleakage.
Do not carry with a pipe guide.
Failuretoheedthiswarningmayresultindamagetopipeguide.
Do not place the product directly on the oor.
Failuretoheedthiswarningmayresultindamagetothedrainpipeandthecontrolbox.
Follow
instructions
<The product>
The product is exclusively vertical surface mounting type.
If the product is used horizontally, household belongings can get wet by drained water or condensation.
Install the product and the duct piping on the indoor side of the insulation layer/airtight layer.
Thetemperatureoftheairafterheatiscollectedontheindoorsideoftheinsulationlayermaydrop,ordrainordew
condensationmightresultintheceilinggettingwet.
Install the product (on the wall) in the direction of the duct connecting ange so that it is horizontal (within ± 1°).
Waterleakagemayresultinwaterdamagetotheoor.
Wear gloves when installing.
Failuretoheedthiswarningmayresultininjury.
Securely install parts so that they are not twisted or deformed.
Injurycouldresultifpartsfall.
Install the product by two persons.
Failuretoheedthiswarningmayresultinproductdamageorinjuryiftheproductfalls.
A power supply isolator must be installed.
Installinapositionwheretheisolatorwillnotbewetbywaterfromthepowercordwhencondensationonthe
exteriorsurfaceoftheproductdrops.
Install in a position where the power cord can be replaced when damaged.
Otherwise,thepowercordcannotbereplaced.
Make sure to connect wiring properly according to the wiring diagram.
Misconnectionmaycausemalfunction.
<Duct piping>
Make sure to insulate ducts down to the base of the duct connecting anges.
Exposedpartsgetcoldinwinter,whichmayresultindewcondensationformingduetomoistureintheroom.
Do not allow duct piping to contact the inspection opening,ceiling hanging bolts, beams, pillars, and other
duct piping.
Failuretoheedthiswarningmayresultinabnormalnoiseandvibration.
Use an outdoor hood, that makes it less likely for rain water,snow or small animals (for example, bats) from
entering the ends of the supply air and exhaust air ducts.
Topreventtheentryofsmallanimals,installanoutdoorhoodhavinglouvers2cmorlesswide.
When the product is anticipated not to be operated continuously, insulate the RA (Return Air) side ducts.
Indoor humidity can cause condensation because exposed parts can become cold in winter.
Place the duct heaters (supply air preheaters, supply air after-heaters) at least 2 m from the product.
Failuretoheedthiswarningmaycausedamageontheproductduetothepreheatingfromtheheaters.
<Drain piping>
Make sure to connect drain piping by the following procedure to prevent freezing and dew condensation
forming on the surface of the piping
-Connectthedrainpipingontheindoorsideoftheinsulationlayer
-Insulatethedrainpipinguptotheendofthepiping
-Donotlettheendofdrainpipingbeimmersedintheraingutter,etc.
(Attimesofheavysnow,theraingutterfreezesanddrainwaterisnotdischarged,whichresultsinwaterleaking
fromtheproduct.)
Do not use duct booster fan on the RA/EA duct or the OA/SA duct.
Ifanexternalforceisappliedtothebuilt-inbypassdamper,thedampermaybexedonthebypassside,whenitis
switchingbetweenHeatexchangemodeandBypassmode,andheatexchangemaybeprevented.
This appliance is not intended for use by persons (including children) with reduced physical sensory or
mental capabilities, or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their safety. Children should be
supervised to ensure that they do not play with the appliance. (This appliance can be used by children
aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack
of experience and knowledge if they have been given supervision or instruction concerning use of the
appliance in a safe way and understand the hazards involved. Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by children without supervision.)

Eng-5
Note
- Donotinstalltheproductatlocationswheretoxicgasorgascontainingcorrosivecomponentssuchasacids,alkaline,
organicsolvents,orpaintsisgenerated.(Failuretoheedthiswarningmayresultinmalfunction.)
 Donotinstalltheproductnearbedrooms.(Failuretoheedthiswarningmaycausecomplaintsaboutnoise.)
- Forlivingrooms(forexample,bedrooms)whereitisanticipatedthatbuildingambientnoisewillbebelow30dB(A),
usecommerciallyavailableductsthathavesounddeadeningqualitiesonthesupplyairside.(Soundfromtheproduct
resonatesininsidetheductsandmayresultabnormalnoisebeingemittedfromtheairvent.)
- Installsupplyairandexhaustairgrillsatlocationswheretheyarelesslikelytoreverberate.(Failuretoheedthiswarning
maycausecomplaintsaboutnoise.)
- Incoldregionsorregionswithstrongwinds,windoutsidesometimesgetsinsidewhenoperationoftheproductisstopped.
So,werecommendprovidingamotorizedshuttermidwayalongthesupplyairandexhaustairducts.
- Installtheproductsothatdischargedgasorexhaustairfromburningappliancesandequipmentdoesnotowbackinside
theproduct.
- Attheoutdoorhoodinstallationposition,allowatleast3xthediameteroftheductthroughholesbetweentheoutdoor
hoodandtheductssothatexhaustairisnotmixedinwithsupplyair.(Preferablyadistanceof450mmormoreshouldbe
ensuredbetweentheoutdoorhoodandtheducts.)
- Donotconnectductpipesinthewaysshownbelow.(Failuretoheedthiswarningmaycausetheairowtodecreaseor
resultinabnormalnoise.)
- Useanexhaustairlterthathasanon-wovenfabrictypelter.
- Toreducethenoiseofdraindischarge,makesuretoconnectcommerciallyavailablecheckvalvestothedrainpiping.Use
checkvalvesinlinewiththeirinstructions.
- Maketheopeningattheendofthedrainpipingfacedownsothatwaterdrainswell.
- Makesuretoinstalladrainpipeindependently.(Whenyouconnectcommondrainagepipeofanapartmenthouse,itmay
causebackowofdrain.)
- Theductfromtheoutdoorhoodshouldhaveanuphillslopeof1/30ormore.(Itmaycauserainwatertoentertheinsideof
duct.)
-Extremelysharpbends -Manybends -Bendingrightnexttothe
ductconnectionflange
-Extremenarrowingofthe
ductdiameter

Eng-6
202202
88
181
32
595
φ122
224219
86
318
269
115
10 356 20
40
40
228423
178387
30179179179
681
20
242
118
51
(565)
14
2. Outside Dimensions
Unit(mm)
Drainpipe(EA)
φ22
Drainpipe(SA)
φ22
Powersupplycord Controlbox
Pipeguide(SA)
Pipeguide(RA)
Pipeguide(EA)
Pipeguide(OA)
Filtercover(RA)
Filtercover(OA)
Filtercover(SA)
Wallmounthooktop
Controller
Heatexchanger
■VL-250CZPVU-R-E
Wallmounthookdown
Wallbracket
(accessory)
Wallmounthookcenter
Cablestraphole
Accessories
Wallbracket:1 Slim-Lossnay
connectioncable:1
(100mm)
Drainhosexture:2 Washer:8 Drainhose:1
(250mm)
Cablestrap:1
RA:ReturnAir
SA:SupplyAir
EA:ExhaustAir
OA:OutdoorAir

Eng-7
202202
2088181
φ 122
51
(565)
14
242
119
595
32
681
219224
280
309
126
83
10 356 20
40
40
30179179179
228423
178387
Unit(mm)
Drainpipe(EA)
φ22 Drainpipe(SA)
φ22
Powersupplycord Controlbox
Pipeguide(EA)
Pipeguide(OA)
Pipeguide(SA)
Pipeguide(RA)
Filtercover(OA)
Filtercover(RA)
Filtercover(SA)
Wallmounthooktop
Controller
Heatexchanger
■VL-250CZPVU-L-E
Wallmounthookdown
Wallbracket
(accessory)
Wallmounthookcenter
Accessories
Wallbracket:1 Slim-Lossnay
connectioncable:1
(100mm)
Drainhosexture:2 Washer:8 Drainhose:1
(250mm)
Cablestrap:1
Cablestraphole
RA:ReturnAir
SA:SupplyAir
EA:ExhaustAir
OA:OutdoorAir

Eng-8
658
(623)84
31
95
322
372
121
111209
200200200
192 222
222 192
736
15
30
10 20
242242
246
40
40
242
102
φ 145
20
432
460
195428
Drainpipe(EA)
φ22
Drainpipe(SA)
φ22
Powersupplycord Controlbox
Pipeguide(SA)
Pipeguide(RA)
Pipeguide(EA)
Pipeguide(OA)
Filtercover(RA)
Filtercover(OA)
Filtercover(SA)
Wallmounthooktop
Controller
Heatexchanger
■VL-350CZPVU-R-E
Wallmounthookdown
Wallbracket
(accessory)
Wallmounthookcenter
Unit(mm)
Accessories
Wallbracket:1 Slim-Lossnay
connectioncable:1
(100mm)
Drainhosexture:2 Washer:8 Drainhose:1
(250mm)
Cablestrap:1
Cablestraphole
RA:ReturnAir
SA:SupplyAir
EA:ExhaustAir
OA:OutdoorAir

Eng-9
20
192 222
20
222 192
209 112
31
84
(623)
15
242
103
658
242 242
350
377
149
106
10 432
200 200 200
40
246460
195428
40
736
30
φ 145
Drainpipe(EA)
φ22 Drainpipe(SA)
φ22
Powersupplycord
Controlbox
Pipeguide(EA)
Pipeguide(OA)
Pipeguide(SA)
Pipeguide(RA)
Filtercover(OA)
Filtercover(RA)
Filtercover(SA)
Wallmounthooktop
Controller
Heatexchanger
■VL-350CZPVU-L-E
Wallmounthookdown
Wallbracket
(accessory)
Cablestraphole Unit(mm)
Wallmounthookcenter
Accessories
Wallbracket:1 Slim-Lossnay
connectioncable:1
(100mm)
Drainhosexture:2 Washer:8 Drainhose:1
(250mm)
Cablestrap:1
RA:ReturnAir
SA:SupplyAir
EA:ExhaustAir
OA:OutdoorAir

Eng-10
254250
254 250
20134289
φ 183
φ 157
49
(632)
14
242
120
725
32
748
235
51
235
332
144
381
378
173
10 556 20 40
40
29
223223223
236482
185447
Drainpipe(EA)
φ22
Drainpipe(SA)
φ22
Powersupplycord
Controlbox
Pipeguide(SA)
Pipeguide(RA)
Pipeguide(EA)
Pipeguide(OA)
Filtercover(RA)
Filtercover(OA)
Filtercover(SA)
Wallmounthooktop
Controller
Heatexchanger
■VL-500CZPVU-R-E
Wallmounthookdown
Wallbracket
(accessory)
Wallmounthookcenter
Unit(mm)
Accessories
Wallbracket:1 Slim-Lossnay
connectioncable:1
(100mm)
Drainhosexture:2 Washer:8 Drainhose:1
(250mm)
Cablestrap:1
Cablestraphole
RA:ReturnAir
SA:SupplyAir
EA:ExhaustAir
OA:OutdoorAir

Eng-11
254250
254 250
20134289
φ 183
φ 157
49
(632)
14
242
120
725
32
748
235
51
235
424
453
265
219
10 556 20 40
40
29
223223223
236482
185447
Drainpipe(EA)
φ22
Drainpipe(SA)
φ22
Powersupplycord
Controlbox
Pipeguide(EA)
Pipeguide(OA)
Pipeguide(SA)
Pipeguide(RA)
Filtercover(OA)
Filtercover(RA)
Filtercover(SA)
Wallmounthooktop
Controller
Heatexchanger
■VL-500CZPVU-L-E
Wallmounthookdown
Wallbracket
(accessory)
Cablestraphole Unit(mm)
Wallmounthookcenter
Accessories
Wallbracket:1 Slim-Lossnay
connectioncable:1
(100mm)
Drainhosexture:2 Washer:8 Drainhose:1
(250mm)
Cablestrap:1
RA:ReturnAir
SA:SupplyAir
EA:ExhaustAir
OA:OutdoorAir

Eng-12
3. Standard Installation Example
3.1 Installation example
Note
- Make sure that the exhaust air connection has two or more conuence points with the piping from the bathroom.
- Preheaters and electric dampers may be required in your region.
- Read the instructions carefully in advance when using optional components and commercially available components.
EA
SA
RA
OA
Pre-heater
(Fieldsupply)
OAshutter
(Fieldsupply)
Remotecontroller
(UseP-RCC-E)
Router
(Fieldsupply)
Bypassswitch
(Fieldsupply)
Livingroom
Restroom
Humiditysensor
(Fieldsupply)
Ventilationfan
interlockinglighting
switch(Fieldsupply) Isolator
(Fieldsupply)
CO2sensor
(Fieldsupply)
Wi-Fiinterface
(UseMAC-567IF-E)
Outdoor
Tablets
(Fieldsupply)

Eng-13
Unit(mm)
■VL-250CZPVU-R-E
■VL-250CZPVU-L-E
150
300
298
125
500
46
300
150
500
298
600
600
60
125
3.2 Working space
(required space around the product)
This product requires regular maintenance (lter cleaning, parts replacement). Place the product away from any other
obstacles for maintenance.
Unit(mm)
Controlbox
Controlbox
Spacetopullout
Spacetopullout
Note
-Secure about 2 mm of clearance from the side faces of the product to any other obstacles. (If not enough clearance
is secured, maintenance cannot be performed. Plus, vibration can result.)
-Secure space below the product for withdrawing the control box. (If not enough space is secured, maintenance
cannot be performed.)

Eng-14
■VL-350CZPVU-R-E
■VL-350CZPVU-L-E
300
150
580
60
678
678
298
125
580
150
125
298
300
46
1010
1010
Unit(mm)
Unit(mm)
Controlbox
Controlbox
Spacetopullout
Spacetopullout
Note
-Secure about 10 mm of clearance from the side faces of the product to any other obstacles. (If not enough clearance
is secured, maintenance cannot be performed. Plus, vibration can result.)
-Secure space below the product for withdrawing the control box. (If not enough space is secured, maintenance
cannot be performed.)

Eng-15
■VL-500CZPVU-R-E
■VL-500CZPVU-L-E
150150
300300
125
298
745
745
125
700
60
125
700
298
1010
10 10
46
125
Unit(mm)
Unit(mm)
Controlbox
Controlbox
Spacetopullout
Spacetopullout
Note
-Secure about 10 mm of clearance from the side faces of the product to any other obstacles. (If not enough clearance
is secured, maintenance cannot be performed. Plus, vibration can result.)
-Secure space below the product for withdrawing the control box. (If not enough space is secured, maintenance
cannot be performed.)

Eng-16
4. Installation Procedure
WARNING
Select a place which is strong enough to support the
product, and install the product securely.
Injurycouldresultifpartsfall.
CAUTION
Install the product in the indoor side of the insulation
layer/airtight layer.
Wheninstalledontheoutdoorsideoftheheatinsulating
layer,thetemperatureoftheheat-exchangedairwilldropand
condensationwillform,whichwillcausetheoortogetwet.
The products should be attached to a vertical surface.
Theproductsmaynotbeproperlymountedandmaycause
deformationoftheproduct.
Transportation and installation of the product is carried
out by two or more people.
Causeofdamageorinjuryoftheproductduetoproductfall.
Wear gloves when installing.
Failuretoheedthiswarningmayresultininjury.
Note
- Theproductisdesignedforwallmounting,onlyonasolid
wall.(Wallstrengthisneededmorethan250kg/m2.)
- Agypsumblockorstud/plasterboardwallwillnotsu󰀩ce.
4.1 Wall bracket
Fixthewallbracket(Included)tothewall,ensuringitis
locatedhorizontally.Markthexingpointsthroughthepre-
drilledholesinthebracket,andtightenthescrews(normal
diameter4mm),ensuringtheinterlocksideisatthebottom.
Wallbracket
(Included)
Screw(normaldiameter4mm)
(Fieldsupply)
4.2 Mounting the Product
CAUTION
Do not carry with a pipe guide.
Failuretoheedthiswarningmayresultindamagetopipe
guide.
Do not place the product directly on the oor.
Failuretoheedthiswarningmayresultindamagetothedrain
pipeandthecontrolbox.
4.3 Fixing the Product
CAUTION
Install the product on the wall horizontally. (within ±1°)
Waterleakagefromtheproductmayresultinwaterdamage
totheoor.
Note
- Useawasher(Included),whenthereisagapbetweenthe
attachedsurfaceandthehooks.
Wallbracket
Wallmounthookcenter
(product)
Controlbox
Drainpipe
Screw(normaldiameter4mm)
(Fieldsupply)

Eng-17
4.4 Connecting the Pipes
4.4.1 Piping Ducts
WARNING
Install the ducts in the indoor side of the insulation layer/
airtight layer.
Wheninstalledontheoutdoorsideoftheheatinsulating
layer,thetemperatureoftheheat-recoveredairwilldropand
condensationwillform,whichwillcausetheoortogetwet.
Secure duct piping with commercially available xing
bands, aluminum tape, etc. to prevent piping from loose.
Install outdoor piping from the product so that it is tilted
at a downward pitch of at least 1/30 towards the outside.
Failuretoheedthiswarningmaycauserainpenetration,
resultinginelectricshock/reorwaterdamagetohousehold
property.
Piping should be installed so that no load is applied to
the pipe guide.
Failuretoheedthiswarningmaycausedampermulfunction.
Note
- Whendischargingtheairfromabathroom,useductsmade
ofamaterialthatdoesnotallowwatertoleak.
- WhenusingPVCductsormetalductsfortheSAside
ducts,makesuretoconnectductshavingsilencerbefore
thegrill.
- Theductforexhaustfromthebathroomandthepipeguide
shouldbesealedwithcaulkingmaterial.
- Whenusingcalkingmaterial,takecaretopreventitfrom
oozingfromtheducts.(Otherwise,itcouldcausealuminum
tapetopeelo󰀨.)
- Beforeconnectingtheducts,makesurethatthereareno
metalchipsorotherforeignmatter(Forexamplepaperor
vinyl)insidetheductsorinsidetheproduct.
■VL-250CZPVU-R-E
■VL-250CZPVU-L-E
■VL-350CZPVU-R-E
■VL-350CZPVU-L-E
■VL-500CZPVU-R-E
■VL-500CZPVU-L-E
DuctInnerdiameter
φ125(Fieldsupply)
Caulkingmaterial
(Fieldsupply)
Aluminumtape
(Fieldsupply)
Pipeguide
(Product)
DuctInnerdiameter
φ150(Fieldsupply)
Caulkingmaterial
(Fieldsupply)
EPS
(Product)
Aluminumtape
(Fieldsupply)
Pipeguide
(Product)
DuctInnerdiameterφ180orφ160
(Fieldsupply)
Caulkingmaterial
(Fieldsupply)
Aluminumtape
(Fieldsupply)
Pipeguide
(Product)

Eng-18
4.4.2 Insulating the Ducts
CAUTION
To prevent dew condensation, insulate the ducts and
pipe guide. (glass wool 25 mm or equivalent)
Make sure to insulate up to the base of pipe guide.
When the product is anticipated to be stopped for a long
time, insulate the RA (Return Air) side ducts also. (i.e. not
operated for 24 hours).
Indoor humidity can cause condensation because
exposed parts can become cold in winter.
■VL-250CZPVU-R-E
■VL-250CZPVU-L-E
■VL-350CZPVU-R-E
■VL-350CZPVU-L-E
■VL-500CZPVU-R-E
■VL-500CZPVU-L-E
Note
- Attachinsulationsothatthealuminumtapeisnotexposed.
Insulating(Fieldsupply)
Insulating(Fieldsupply)
Insulating(Fieldsupply)

Eng-19
4.5 Drain piping
CAUTION
Make sure to connect drain piping by the following
procedure to prevent freezing and dew condensation
forming on the surface of the piping
-Connectthedrainpipingontheindoorsideoftheinsulation
layer
 Insulatethedrainpipinguptotheendofthepiping
-Donotlettheendofdrainpipingbeimmersedintherain
gutter,etc.
(At times of heavy snow, the rain gutter freezes and
drain water is not discharged, which results in water
leaking from the product.).
This product has two drain pipes for EA and SA.
EAmeansExhaustAirside,SAmeansSupplyAirside.
EAdrainpipe:Pipingrequired
SAdrainpipe:Dependontemperatureandhumidity,see
thefollowingconditions.
EAdrainpipe
connection
EAdrainpipe
connection
SAdrainpipe
connection
SAdrainpipe
connection
Rtype Ltype
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 40
Indoortemperature( ºC )25
SAdrainpiping
requiredarea
Outdoorhumidity(%RH)
Outdoortemperature( ºC )
4.5.1 Connection method of drain hose (EA drain
pipe)
1)Securelyconnecttheaccessarydrainhosetotherootof
theconnectionport.
 Securelyxtheaccessoryhosebandbytighteningwith
aatheadscrewdriver.(Otherwise,waterleakagecan
result.)
2)Connectoneedgeofthedrainhosetothecommercially
availabledrainpipe(Drainpipeforbuilding:hardPVCpipe
(outsidediameter:φ22)).
 Securelyxtheaccessoryhosebandbytighteningwitha
atheadscrewdriver.
3)Connectthedrainpipesothatithasatleastthreedegree
ofdownwardgradientfromthelowerpartoftheunit.
(Otherwise,waterleakagecanresult.)
4)Makesuretoattachcommerciallyavailablecheckvalves.
Forhowtouse,followtheirinstructions.(Ifnotused
properly,waterleakagecanresult.)
Note
- Donotadheredrainhoseswithdrainconnectionports.
(Otherwise,maintenancecannotbeperformed.)
- Donotplacethedrainpipingnearbythespacefor
withdrawingthecontrolbox.(Ifthecontrolboxcannotbe
pulledout,productmaintenancecannotbeperformed.)
4.5.2 Connection method of drain hose (SA drain
pipe)
1)ExtractthedraincapfromtheconnectionportoftheSA
drainpipe.Thecapisxedwithtape.
2)DothepipingfollowingthesameproceduresastheEA
drainpipe.
 Drainhosesarenotincluded;contactyourdealeror
contractor.
Spaceforwithdrawingthecontrolbox
Outsidediameter
φ22Drainpipe
(Fieldsupply)
Checkvalve
(Fieldsupply)
Morethan3°
Drainhose(Included)
Drainhosexture(Included)
SAdrainpipe
connection
Draincap

Eng-20
WARNING
Electrical work must be carried out safely and reliably by
a professional electrical contractor (properly qualied
electrician) in accordance with internal wiring provisions
and electricalequipment technical standards.
Poorconnectionandfaultyelectricalworkcouldresultin
electricshockorre.
Use 220 to 240 V AC power.
Failuretoheadthiswarningmayresultinre,electricshock
ordamagetothecircuitboards.
Make sure to install the ground wire.
Incaseofproductfailureandelectricleakage,itmaycause
anelectricshock.
CAUTION
A power supply isolator must be installed.
Installinapositionwheretheisolatorwillnotbewetbywater
fromthepowercordwhencondensationontheexterior
surfaceoftheproductdrops.
Install an isolator in a position where the power cord can
be replaced when damaged.
Otherwise,thepowercordcannotbereplaced.
If the supply cord is damaged, it must be replaced by
the manufacturer, its service agent or similarly qualied
persons in order to avoid a hazard.
Make sure to connect wiring properly according to the
wiring diagram.
Misconnectionmaycausemalfunction.
Please understand that expenses incurred in
recovery work to deal with the above malfunction
shall be borne by the contractor.
5. Electrical Work
5.1 Standard use
Powercord(product)
- LS(Blackcord)meansLiveswitchforkitchenandbath
room.WhenyouuseLS,removeprotectivetube.
- Wiringexample(forkitchenandbathswitches)
CAUTION
Do not connect a load such as lighting to the live switch
input.
Itmaycauseproductfailure.
Note
- Whentheswitchisturnedon,thecircuitboardsecures
30mA.Ifusingtheminimumloadcapacityof10mA,the
maximumnumberofswitchesthatcanbeusedfortheLive
switchinputis3pcs.
- RegardingthesettingmethodofBoost(Purge)mode,see
6.4.5.3Liveswitch.Atthefactorydefaultsettings,Live
switchwillnotworkjustbyconnectingtheLS.
Ｎ
EARTH(Green/Yellow)
LS(Black):coveredbya
protectivetube
N(Blue)
L(Brown)
L
N
L
N
LS
Powersupply
220-240V/50Hz
220V/60Hz
SW
(Bipolar
single-throw)
Kitchen
SW
Isolator
(Fieldsupply)
Bathroom
light
Powercordfromproduct
GREEN/
YELLOW
BROWN
BLUE
BLACK