™
MTD-ERV 350 / 365
Installation &
Operating Manual
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All rights reserved.
Thismanualhasbeenproducedwiththegreatestcareandattention.Nevertheless,thepublisheracceptsnoliabilityfordam-
age resulting from missing or incorrect information in this manual.
II
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Table of Contents
1
INTRODUCTION............................................................................................................................. 1
1.1 Foreword .................................................................................................................................. 1
1.2 CE Symbol ............................................................................................................................... 1
1.3 Warranty and Liability ............................................................................................................. 1
1.3.1 General..................................................................................................................... 1
1.3.2 Warranty Terms......................................................................................................... 1
1.3.3 Liability...................................................................................................................... 1
1.4 Safety........................................................................................................................................ 2
1.4.1 Safety Precautions.................................................................................................... 2
1.4.2 Safety Installations and Safety Measures................................................................. 2
1.4.3 Symbols Used .......................................................................................................... 2
2
INSTRUCTIONS FOR THE USER.................................................................................................. 3
2.1
Definition of Terms............................................................................................................. 3
2.1.1 Balanced Ventilation ................................................................................................. 3
2.1.2 Heat Recovery.......................................................................................................... 3
2.1.3 Bypass for Free Cooling ........................................................................................... 3
2.1.4 Frost Protection ........................................................................................................ 3
2.1.5 Chimney Sweep Control........................................................................................... 3
2.1.6 Moisture Recovery (Option)...................................................................................... 4
2.2
2.3
Available Operating Aids................................................................................................... 4
2.2.1 CC Ease Operating Unit........................................................................................... 4
2.2.2 3-position Switch (Option) ........................................................................................ 5
2.2.3 Bathroom Switch (Option) ........................................................................................ 6
Use of the CC Ease Operating Unit .................................................................................. 6
2.3.1 Setting Date and Time.............................................................................................. 6
2.3.2 Reading and Setting Comfort Temperature .............................................................. 6
2.3.2 Reading and Setting Ventilation Level ...................................................................... 7
2.3.4 Switching Extractor Hood On and Off (Option)* ....................................................... 8
2.3.5 Switching Supply and Exhaust Air Fan On and Off .................................................. 8
2.3.6 Setting Ventilation Programme ................................................................................. 9
2.3.7 Setting Additional Functions via the P Menus ........................................................ 10
2.4
2.5
2.6
Use of the Switch(es) (Option)........................................................................................ 13
2.4.1 Setting Ventilation Using 3-position Switch(es)....................................................... 13
2.4.1 Setting Ventilation Using Bathroom Switch(es)....................................................... 13
Service by the User.......................................................................................................... 13
2.5.1 Cleaning or Replacing Filters ................................................................................. 14
2.5.2 Cleaning Valves (in the Home) ............................................................................... 15
Malfunctions..................................................................................................................... 15
2.6.1 Malfunction indication on the CC Ease Display...................................................... 15
2.6.2 3-position Switch with Malfunction LED.................................................................. 15
2.6.3 What to Do in the Event of a Malfunction? ............................................................. 16
2.7 End of Service Life................................................................................................................ 16
Table of Contents III
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3
FUNCTION OF THE SYSTEM ...................................................................................................... 17
3.1
3.2
3.3
3.4
Components of the Balanced Ventilation System......................................................... 17
Controlled Ventilation System......................................................................................... 17
MTD-ERV 350.................................................................................................................... 18
Additional Options........................................................................................................... 19
3.4.1 Ventilation via Extractor Hood* ............................................................................... 19
3.4.2 Preheater in MTD-ERV 350 ................................................................................... 20
3.4.3 Post-heater* in Duct System................................................................................... 20
3.4.4 CO2 Sensor* in the Home...................................................................................... 21
3.4.5 RH Sensor* in the Home ........................................................................................ 21
3.4.6 Underground Geothermal Heat Exchanger*........................................................... 22
3.4.7 Chimney Sweep Control......................................................................................... 22
3.5
3.6
Technical Specifications ................................................................................................. 23
Dimension Sketch............................................................................................................ 25
4
INSTRUCTIONS FOR THE INSTALLER ...................................................................................... 26
4.1
4.2
Preconditions for Installation ......................................................................................... 26
Installation of the MTD-ERV 350..................................................................................... 26
4.2.1 Transport and Unpacking........................................................................................ 26
4.2.2 Checking the Scope of Supply................................................................................ 26
4.3
Wall Mounting................................................................................................................... 27
4.3.1 Connection of the Air Ducts.................................................................................... 27
4.3.2 Connection of the Condensation Drain................................................................... 27
4.4
4.5
4.6
Commissioning the MTD-ERV 350 ................................................................................. 28
Setting the Air Specifications ......................................................................................... 34
Maintenance by the Installer........................................................................................... 34
4.6.1 Inspection of Heat Exchanger and Fans................................................................. 34
4.6.2 Filter Cleaning, if Preheater is Fitted ...................................................................... 36
4.7
Malfunctions..................................................................................................................... 37
4.7.1 Malfunction Indications on the CC Ease Display.................................................... 37
4.7.2 Malfunction Indications on the CC Ease Display ‡ Remedy................................. 38
4.7.3 Malfunctions (or Problems) without Indications ...................................................... 43
4.8
4.9
Spare Parts ....................................................................................................................... 44
Wiring Diagram: MTD-ERV 350 – LEFT-HAND Standard Version................................. 45
4.10 Wiring Diagram: MTD-ERV 350 – LEFT-HAND Luxury Version .................................... 46
4.11 Wiring Diagram: MTD-ERV 350 – RIGHT-HAND Standard Version............................... 47
4.12 Wiring Diagram: MTD-ERV 350 – RIGHT-HAND Luxury Version .................................. 48
4.13 EC Declaration of Conformity......................................................................................... 49
IV Table of Contents
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1 Introduction
This chapter contains general information on the MTD-ERV 350.
1.1 Foreword
1.3 Warranty and Liability
1.3.1 General
Apartfromthisgeneralchapter,thisoperatingman-
ual consists of:
•
•
•
A section for the user,
A section with technical specifications, and …
A section for the installer.
Our “General Terms and Conditions” in their latest
wording apply to the MTD-ERV 350. The warranty
period begins with commissioning, but not later
than one month after delivery.This applies to ma-
terial replacement and does not include labour. It
applies only on proof of maintenance having been
performed by a specialist company in accordance
with our instructions.
Read this operating manual carefully be-
fore putting the unit into operation.
- User Chapters 1 to 3.
- Installer Chapter 4.
This operating manual contains all the information
required for safe and optimum installation, opera-
tion and maintenance of the MTD-ERV 350. In ad-
dition, it should serve you as a reference manual
during service work so that this can be carried
out safely and responsibly. The unit is subject to
ongoing improvement and further development.
Your MTD-ERV 350 may therefore differ slightly
from the descriptions in this operating manual.
1.3.2 Warranty Terms
The manufacturer's warranty on the MTD-ERV 350
isforaperiodof24monthsafterinstallation, butup
toamaximumof30monthsafterthedateofmanu-
factureofthe MTD-ERV 350.Warrantyclaimscanbe
made only for material flaws and/or design errors
discoveredduringthewarrantyperiod.Intheevent
of a warranty claim, the MTD-ERV 350 must not be
dismantled without the prior written authorisation
of the manufacturer.The manufacturer's warranty
coverssparepartsonlyifthesehavebeeninstalled
by an installer approved by the manufacturer.
NOTE:
This manual has been produced with the
greatest care and attention. However, no
rights can be derived from this. Furthermore,
the company reserves the right to change the
contents of this operating manual at any time
without prior notification.
The warranty will be voided if:
•
•
•
The warranty period has expired;
The unit is operated without filter;
Parts not supplied by the manufacturer are in-
stalled;
•
Unauthorised changes or modifications are
made to the unit.
1.2 CE Symbol
TheunitismarketedunderthenameMTD-ERV 350.
TheMTD-ERV 350isabalancedventilationsystem
with heat recovery for healthy, balanced and ener-
gy-saving ventilation of living premises.
The year of construction of the MTD-ERV 350 is
shown on the identification plate of the ComfoAir
350.
1.3.3 Liability
TheMTD-ERV 350hasbeendevelopedandmanu-
factured for use in "balanced ventilation systems".
Useinanyotherwaydoesnotconstitutean'intend-
ed use' and can result in damage to the MTD-ERV
350orinpersonalinjuryforwhichthemanufacturer
accepts no liability.
Themanufactureracceptsnoliabilityfordamageor
injury resulting from the following causes:
•
Failure to observe the safety, operating and
maintenance instructions contained in this op-
erating manual.
•
•
•
Installation of spare part not supplied by the
manufacturer.
The responsibility for the use of such spare
parts lies solely with the installer.
Normal wear.
Introduction
1
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I
1.4 Safety
1.4.2 SafetyInstallationsandSafetyMeasures
1.4.1 Safety Precautions
•
The MTD-ERV 350 cannot be opened without
the use of tools.
Observethesafetyprecautionsgiveninthisoperat-
ingmanualatalltimes.Failuretoobservethesafety
precautions,warnings,commentsandinstructions
canresultinpersonalinjuryordamagetotheMTD-
ERV 350.
•
It must not be possible to touch the fans with
your hand. An air duct must therefore be con-
nected to the MTD-ERV 350. The minimum
duct length is 900 mm.
Only an approved installer is authorised to install,
connect,commissionandservicethe MTD-ERV 350
in a way other than that described in this operating
manual.
1.4.3 Symbols Used
The following symbols are used in this operating
manual:
•
The MTD-ERV 350 must be installed in accord-
ancewiththegenerallocalbuilding, safetyand
installation regulations of the responsible pub-
lic utility and other relevant safety authorities
(such as the GIW - Dutch Institute for Certified
Builders).
Caution!
Danger of:
•
•
•
Follow the safety precautions, warnings, com-
ments and instructions given in this operating
manual at all times.
Store this operating manual in the vicinity of
the MTD-ERV 350 at all times during its whole
service life.
The instructions on the regular cleaning and/
or changing of the filters and air inlet/outlet
valves must be strictly observed
- Damage to the unit, or
- Physical injury to the user, or
- Impairment of the operating of the
unit
if the instructions are not correctly
followed.
•
•
•
•
The specifications contained in this document
must not be altered.
AllmodificationstotheMTD-ERV 350arestrict-
ly forbidden.
TheMTD-ERV 350isnotsuitableforconnection
to an AC power supply.
In order to ensure that the unit is inspected at
regular intervals, we recommend that the user
concludesaservicecontract.Yoursuppliercan
provide you with the addresses of authorised
installers in your vicinity.
2
Introduction
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2. Instructions for the User
This chapter describes how you should use the MTD-ERV 350.
ing the summer months. Admitting the cool night
air on warm days allows the room temperature in
thehometobereduced.Thebypassfunctionsauto-
matically.You simply have to set your comfort tem-
perature.See section 2.3.2 for further information.
TheMTD-ERV350thenmaintainsthistemperature
as closely as possible.
Congratulations, you are now the owner of
the MTD-ERV 350,
the heat recovery unit from Zehnder Com-
fosystems. We wish you every comfort.
2.1 Definition of Terms
Ensure that the comfort temperature
in winter is not set below the tem-
perature you prefer.
The MTD-ERV 350 has the following functions:
•
•
•
•
•
•
Balanced ventilation.
Heat recovery.
Bypass for free cooling.
Frost protection.
Chimney sweep control.
Moisture recovery (option).
If the comfort temperature in winter is
below the preferred temperature, it is
possible for the heating to be switched
on with the bypass open.That is a waste
of energy.
Theseterms/propertiesaredescribedinmoredetail
briefly in the following sections.
2.1.4 Frost Protection
2.1.1 Balanced Ventilation
The MTD-ERV 350alsohasafrostprotectionsystem.
This protects the heat exchanger (or the optional
combined heat and moisture exchanger, see sec-
tion 2.1.6) from freezing.The risk of freezing exists
in the winter months with moderate to heavy frost.
The MTD-ERV 350 is equipped as standard with an
automaticallyactivatedfrostprotectionsystemthat
- when there is a risk of frost - temporarily
reducesthesupplyofoutsideairsothatcondensa-
tionintheexchangercannotfreeze.Apreheatercan
also be installed in the MTD-ERV 350 as an option.
Thishastheadvantagethatthebalancedventilation
then remains operational.The inlet of cold outside
air then no longer needs to be reduced.In addition,
thisoptionoffersgreatercomfortasthesupplyairis
againpreheatedtomoreorlessroomtemperature.
If there is no preheater installed in your MTD-ERV
350, ask your installer about the possibilities.
TheMTD-ERV350isabalancedventilationsys-
tem.Thisisthemosteconomicalandbalanced
form of ventilation for homes. In a balanced
ventilation system, polluted air from kitchen,
bathroom, toiletandpossiblyevenstoreroom
is drawn off and replaced by an equal volume
offreshairinthelivingroomandbedroom.Air
gaps under the doors ensure good air circula-
tion in the home.This air circulation is literally
balanced.
Ensure that these gaps are not covered
by, for example, rubber door seal strips
or high-pile carpets.This would prevent
the system from operating optimally.
2.1.5 Chimney Sweep Control
2.1.2 Heat Recovery
TheMTD-ERV 350alsohasachimneysweepcontrol
system.ThisisasystemthatpreventstheMTD-ERV
350 from creating an imbalance in the ventilation
system, i.e. between the supply and exhaust air.
Thechimneysweepcontrolsystemfunctionsauto-
matically.Thissystemblocksorresetsotherventila-
tion control systems that could possibly create an
imbalanceintheventilationsystemandthatcanbe
automatically switched on and off by the software.
One example of this is that the supply and exhaust
airfanscannotbeswitchedoffseparatelywhenthe
chimney sweep control system is active.
Apartfromensuringtherightbalancebetweensup-
plyandexhaustair,theMTD-ERV 350alsooffersthe
advantagethattheheatfromtheexhaustairisgiven
off to the fresh, generally cooler outside air.This is
made possible by the integral heat exchanger. In
this way, roughly 95% of the discharged heat is re-
covered.Thesupplyaircanentertheroomsalmost
at room temperature. Draughts are now a thing of
the past.
2.1.3 Bypass for Free Cooling
Apart from transferring heat from the exhaust air
to the fresh, generally cooler outside air, the MTD-
ERV 350 also offers the possibility of discharging
thewarmerexhaustairdirectlyintotheatmosphere
withoutpassingthroughtheheatexchanger.Thisis
madepossiblebytheintegralbypass.Thebypassis
an additional circulating air duct that (temporarily)
interruptstheheattransferbetweentheexhaustair
and supply air.The cool outside air is then not pre-
heated before it enters the dwelling.
The chimney sweep control system is employed in
dwellings with open fire, as here air can be drawn
back by the draught of the chimney. If problems
occur with the smoke discharge via the draught of
the chimney, this situation must on no account be
caused (or exacerbated) by the MTD-ERV 350.The
chimney sweep control system then interacts with
the existing ventilation control systems in such a
waythattheMTD-ERV 350cannot(orcannolonger)
cause an imbalance in the ventilation system.
The bypass is used particularly on warm days dur-
Instructions for the User
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2
2.1.6 Moisture Recovery (Option)
In addition to the heat transfer from the exhaust air
to the fresh, generally cooler outside air, the MTD-
ERV 350 also offers the possibility of transferring
part of the moisture of the exhaust air to the fresh,
generally dryer outside air. This is made possible
by the (optional) integral moisture exchanger.The
moistureexchangerissuppliedasacombinedheat
and moisture exchanger and is not installed as an
additionalexchangeralongsidetheheatexchanger
oftheMTD-ERV 350.Thisexchangerthenhasanad-
ditionalfunction,i.e.recoveringmoistureinaddition
to the recovery of heat.In this way, up to 65% of the
moistureisrecoveredfromtheexhaustair.Thesup-
ply air can thus enter the rooms with an increased
moisture content.
2.2.1 CC Ease Operating Unit
The MTD-ERV 350isoperatedusingtheCCEaseop-
erating unit.
TheCCEase(=ComfortControlEase)operatingunit
is installed on the wall in the living room and com-
municates from there with the MTD-ERV 350.
The MTD-ERV 350 is equipped as
standard with only a heat exchanger.
The exchanger with combined heat and
moisture recovery can be ordered as an
option.
2.2 Available Operating Aids
The MTD-ERV 350 is equipped with the following
operating aids:
Thenextsectiondescribesbrieflywhatinformation
can be read off.
•
•
CC Ease operating unit of the MTD-ERV 350.
Position switch (option) for setting the ventila-
tion levels.
•
Bathroom switch (option) for temporarily set-
ting the highest ventilation level.
These operating aids are described in more detail
briefly in the following sections.
4
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Day and time
Air supply and/or air
exhaust OPEN or CLOSED
Automatic or
manual ventilation
Geothermal heat recovery,
post-heater and/or
bypass on
Warning to replace internal (I)
or external (E) Filter
Actual ventilation position
(with activated extractor
hood, if applicable)
Comfort temperature setting
(also indicates whether
system is heating or cooling)
TheCCEaseoperatingunithasvariouskeysforoperatingandsettingtheMTD-ERV 350.Thesekeysareexplained
below.
This key is used to switch the extractor hood on or off.
- Press for less than 1 second! ON.
- Press for longer than 1 second! OFF.
This key is used to switch the supply and/or discharge of air on or off.
- Press once! SUPPLY OFF (and EXHAUST ON).
- Press twice! SUPPLY and EXHAUST OFF.
- Press three times! EXHAUST OFF (and SUPPLY ON).
- Press four times! SUPPLY and EXHAUST ON.
This key allows you to read off or set the comfort temperature.
- Press for less than 1 second! READ OFF.
- Press for longer than 1 second ! SET.
This key allows you to switch from AUTO to MANUAL ventilation.
- Press for less than 1 second ! Set ventilation programme.
- Press for longer than 1 second! Set date and time.
These keys allow two functions to be set:
- In AUTO ventilation Select the ventilation level.
- In MANUAL ventilation Enter the setting values.
A3-positionswitchcanbeusedtosettheventilation
levels of the MTD-ERV 350.One or more 3-position
2.2.2 3-position Switch (Option)
switchescanbeinstalledinahome(forexample,in
VentilationwiththeMTD-ERV 350canalsobeoper-
the kitchen). The exact version may differ slightly
ated by means of a 3-position switch.
from the images above.The following switch types
are available:
•
•
Type 1 Standard 3-position switch.
Type 2 3-position switch with LED for mal-
function and filter indication.
•
Type 3 Wireless 3-position switch with:
LED for malfunction and filter indi-
cation.
Auxiliary switch: position 3 is acti-
vated for a given time (2 possibili-
ties for setting the time).
Type 1
Type 2
Type 3
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2
2.2.3 Bathroom Switch (Option)
Ventilation with the MTD-ERV 350 can also be op-
erated by means of a bathroom switch.
A bathroom switch can be used to temporarily
set the highest ventilation level of the MTD-ERV
350.This switch can be installed in the bathroom,
for example, for discharging excess moisture as
quickly as possible after showering. As the bath-
room switches can have very different designs,
no switch is illustrated here.
If desired, the user can also enter an activation
and deactivation delay for the bathroom switch
via the CC Ease operating unit (see section
2.3.7). This allows the user to specify, for exam-
ple, that the MTD-ERV 350 switches to the high-
est ventilation level 5 minutes after the bathroom
switch is activated and then returns to the normal
(or originally set) ventilation level automatically
after 20 minutes.
7. Press "
" briefly again.
8. Wait until the minutes, e.g." 00 ", start to flash.
9. Select with "
" or "
" the correct min-
utes.
In many cases, however, no separate bathroom
switch is installed and the bathroom ventilation
control is integrated into the bathroom light switch.
The MTD-ERV 350 then switches automatically to
the highest ventilation level when the bathroom
light is switched on. The MTD-ERV 350 then re-
turns to the normal (or originally set) ventilation
level as soon as the bathroom light is switched
off. Here again, an activation and deactivation de-
lay can be set via the CCE Ease operating unit.
10 Press "
" briefly again to quit the menu.
2.3.2 ReadingandSettingComfortTemperature
Via the CC Ease operating unit it is possible:
2.3 Use of the CC Ease Operating Unit
ThefollowingfunctionscanbesetusingtheCCEase
operating unit:
v
To read off and set the comfort temperature.
The comfort temperature is the temperature at
which the MTD-ERV 350:
(a) Uses the heat exchanger for heat recovery;
(b) Switches on the bypass (hence bypassing
the heat exchanger) to (temporarily) interrupt the
exchange of heat between the exhaust air and
the supply air.
•
•
Reading off and setting date and time.
Reading off and setting the comfort tempera-
ture.
•
•
Reading off and setting the ventilation levels.
Switching the extractor hood on and off (op-
tion)*.
•
Switching the supply and exhaust air fans on
and off.
You can read off the comfort temperature, but
also set the desired temperature. The MTD-ERV
350 will then automatically maintain this tem-
perature as closely as possible after setting. The
comfort temperature generally corresponds to
the temperature that you have set on the room
thermostat (of your central heating).
•
•
Setting an individual ventilation programme.
Setting additional ventilation control func-
tions/options in the P menus.
These functions are described in more detail
briefly in the following sections.
2.3.1 Setting Date and Time
Reading off the comfort
Via the CC Ease operating unit it is possible:
temperature
•
To set the date and time.
Proceed as follows:
Proceed as follows:
1. Press "
2. Waituntilthecomforttemperatureisdisplayed.
3. Press " " briefly now to quit the menu.
".
1. Press for two seconds on "
".
2. Wait until the day, e.g. "Sa", starts to flash.
3. Select with "
" or "
" the correct day.
4. Press "
" briefly.
Without pressing the key, the menu is
quit automatically after 30 seconds.
5. Wait until the hours, e.g. " 12 ", start to flash.
6. Select with "
" or "
" the correct hour.
6
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2
Position 1 ! Low.
Setting the comfort temperature
- Use for a low ventilation require
ment.
Position 2 ! Normal.
Proceed as follows:
1. Press for two seconds on "
".
2. Waituntilthecomforttemperature,e.g."20.0",
starts to flash.
- Use for a normal ventilation re-
quirement.
Position 3 ! High.
3. Select the desired comfort temperature with "
- Use this level during cooking,
showering and when additional
ventilation is desired..
" or "
Press "
".
4
" briefly now to quit the menu.
As far as the ventilation is concerned,
the MTD-ERV 350 adjusts to the highest
ventilation level set in the dwelling, un-
less otherwise set in the automatic soft-
ware control.
The ventilation level can be set as follows:
1. Press "
" to increase the ventilation level.
" to decrease the ventilation level.
2. Press "
2.3.3 ReadingandSettingVentilationLevel
Via the CC Ease operating unit it is possible:
•
To read off and set the ventilation level.
Reading off the ventilation level
Thecurrentlysetventilationlevel, e.g.“2”, isshown
as standard on the CC Ease display.The MTD-ERV
350 normally regulates the necessary ventilation
level automatically. During automatic ventilation,
"AUTO" is shown on the CC Ease display.
Duringventilationsetbyhand,theindication"MAN-
UAL" appears on the CC Ease display.
3. Press "
" to quit the menu.
Setting the ventilation level
You can also set the ventilation level by hand and
thusincreaseordecreasethelevel.Youhaveachoice
of 4 ventilation levels. These are:
•
Level A ! Absent.
- Use during absence.
In level A, the dwelling is ventilated with
the prescribed minimum air volume.
If level A is set on the CC Ease operating
unit, the 3-position switches cannot be
used.
Instructions for the User
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2
This level can be used in the summer when the
windows are open. The fresh air is then drawn
into the house through the open windows and not
via the supply air valves.
2.3.4 Switching Extractor Hood On and Off
(Option)*
Via the CC Ease operating unit it is possible:
To switch the extractor hood on and off.
2. Press "
" twice to
Proceed as follows:
switch off the exhaust air fan (and at the
same time switch on the supply air fan
again).
4. Press for two seconds on "
".
5. Wait untilthesymbolfortheextractorhoodap-
pears.
6. Select with "
" or "
" the ventilation
level, e.g. “ 3”.
3. Press "
" three times to
switch on the supply and exhaust air fans
again.
7. Press "
" briefly to switch off the extrac-
tor hood.
After switching off the extractor hood, the symbol
fortheextractorhooddisappearsagainfromtheCC
Ease display.
Note that by switching off the supply or
exhaust air fan, you temporarily have no
balanced ventilation with heat and (if in-
stalled) moisture recovery in your home.
Never leave the fans switched off for
longer than 12 hours.
2.3.5 SwitchingSupplyandExhaustAirFansOn
and Off
Via the CC Ease operating unit it is possible:
To switch the supply air or exhaust air fan on and
off.
Proceed as follows:
1. Press "
" once to
to switch off the supply air fan.
8
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2.3.6 Setting Ventilation Programme
Via the CC Ease operating unit it is possible:
To set an individual ventilation programme.
A standard ventilation programme was set on the MTD-ERV 350 during manufacture.
This ventilation programme offers a suitable ventilation pattern for most homes. If you wish, you can adapt this
standard ventilation programme to your own ventilation requirements. For example, for a week and a weekend
programme.
Weekday fan
position
Weekend fan
position
The ventilation programme can be set/changed
as follows:
1. Press simultaneously for two seconds on "
" and "
".
This functions only with ventilation set
to "AUTO".
The number of the switching moment
flashes in the bottom right-hand corner.
2. Wait until the day appears.
3. Program the desired days or a sequence of
days.
–
–
Select the switching moment by pressing "
" or "
Press "
ment.
".
–
Select the desired day/days with "
" or "
" to confirm the switching mo-
".
You have the following choices:
–
–
–
–
Sequence of days: “SaSu”.
Sequence of days: “MoTuWeThFri”.
Sequence of days: “SaSuMoTuWeThFri”.
Individual days: “Sa”, “Su”, “Mo”, “Tu”, “We”,
“Th” and “Fri”.
4. Program the starting time for the desired
ventilation level.
–
–
Press "
".
Select with "
" or "
" the desired
time in hours.
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2
2. Wait until "P menu" appears on the display.
3. Select the desired P menu with "
" or "
", e.g. " 2 ".
–
–
Press "
" again.
Wait until the minutes, e.g. " 00 " start to
flash.
–
Select with "
" or "
" the desired
4. Press "
" to confirm the P menu.
time in minutes.
5. Select the desired P sub-menu with "
"
or "
", e.g. " 23 ".
" to confirm the P sub-menu.
6. Press "
–
–
Press "
" again.
Wait until the ventilation symbol starts to
flash.
–
Select the desired ventilation level with "
Making settings in the P menus
" or "
".
The minimum and maximum values for
the available ventilation functions are
stored in the software.
7. Select a new value for the function with "
" or "
8. Press "
".
" to save the value.
9. Repeat steps 5 to 8 to
set several P sub-menus in turn in the same
P menu.
–
Press "
" to store the switching moment.
5. Program the next ventilation programme, if
Or
required.
Return to the P menu; press once on
–
Then perform steps 1 to 5 for the next venti
lation programme.
"
" and possibly start again at step 3.
2.3.7 Setting Additional Functions via the
P Menus
Via several P menus of the CC Ease operating
unit you can:
•
•
•
Read off the status of various ventilation
functions;
Activate or deactivate time delays for various
ventilation functions;
Set time delays for various ventilation func-
tions.
Or
Return to the main window
Press "
" twice.
In the P menus the user may:
- only set the additional functions P1,
P2 and P9.
The remaining P menus P3 to P8 are re-
served for the installer.
Access to the P menus
Proceed as follows:
1. Press "
" and "
" simultaneously.
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Menu P1 ! Status of the functions
Ventilation functions
Sub-menu Description
Activated / not activated
Yes (1) / No (0)
Yes (1) / No (0)
Yes (1) / No (0)
Yes (1) / No (0)
[Not available]
P10
P11
P12
P13
P14
P15
P16
P17
P18
P19
Menu 20 currently active?
Menu 21 currently active?
Menu 22 currently active?
Menu 23 currently active?
[Not available]
Menu 25 currently active?
Menu 26 currently active?
Menu 27 currently active?
Menu 28 currently active?
Menu 29 currently active?
Yes (1) / No (0)
Yes (1) / No (0)
Yes (1) / No (0)
Yes (1) / No (0)
Yes (1) / No (0)
Menu P2 ! Set time delays
Time delay values
Minimum Maximum Default
setting
Sub-menu
Description
P20
(Option)*
Deactivation delay for extractor hood
function.
0 Min.
180 Min. 30 Min.
• 'x' minutes after pressing the extrac-
tor hood switch, the MTD-ERV 350
returns to the previously set level.
Activation delay for the bathroom
switch(toswitchtotheHIGHESTLEVEL).
• 'x' minutes after turning on the
bathroom switch, the MTD-ERV 350
switches to the HIGHEST LEVEL.
P21
(Option)*
0 Min.
15 Min.
0 Min.
Note:
Only for systems with wired
switch and only if your system is
equippedwithasecondposition
switch in the bathroom.
P22
Deactivation delay for the
0 Min.
120 Min. 30 Min.
(Option)*
bathroom switch (to switch to the NOR-
MAL LEVEL).
Note:
• 'x' minutes after turning on the bath-
room switch, the MTD-ERV 350 re-
turns to the NORMAL LEVEL.
Only for systems with wired
switch and only if
your system is equipped with
a second position switch in the
bathroom.
P23
Deactivation delay
0 Min.
120 Min. 30 Min.
for ventilation position 3.
Note:
• Whenposition3(HIGHESTLEVEL)is
switchedonbriefly(<3seconds),the
MTD-ERV 350remainsatthisposition
for the time set in this menu.
Only for systems with a wired
position switch.
If, within the run-down time, the posi-
tion switch or the radio remote control
is activated, the MTD-ERV 350 switches
immediately to the set ventilation level.
P24
Filter warning
1 week 26 weeks 16weeks
• Heretheusercanselectwhen"FILTER
DIRTY" is to appear on the CC Ease
display.
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2
P25
Deactivation delay
1 Min.
20 Min. 10 Min.
for ventilation position 3 (with "
• When
").
Note:
Only for systems with a remote
control switch.
"
"ispressedBRIEFLY(<2sec.),
the MTD-ERV 350 switches to the
HIGHEST LEVEL for‘x’minutes and
then switches back automatically to
the set level.‘x’can be set between 1
and 20 minutes.
Time delay values
Minimum Maximum Default
setting
Sub-menu Description
P26
1 Min.
120 Min. 30 Min.
Deactivation delay for ventilation position 3 (with "
When
" is held depressed (> 2 sec.), the MTD-ERV 350
switchestotheHIGHESTLEVELfor'x'minutesandthen
switchesbackautomaticallytothesetlevel.‘x’canbeset
between 1 and 120 minutes.
").
"
Note:
Only for sys-
tems with a
remote con-
trol switch.
P29
Setting the Levels for the Extractor Hood.
1%
99%
10%
(Option)*
When the extractor hood is switched on, the ventilation
levels for the extractor hood can be set a few percent
higherthanthecorresponding'normal'ventilationlevels.
Menu P9 ! Status of the functions (from menu P5)
Ventilation functions
Activated / not activated
Yes (1) / No (0)
Sub-menu Description
P90
P91
P92
Chimney
sweep control active?
Bypass open (=yes)
/ closed (=no)?
Yes (1) / No (0)
Yes (1) / No (0)
Valve of the geothermal heat
(Option)* exchanger open (=yes)
/ closed (=no)?
P93
(Option)*
P94
Post-heater active?
Yes (1) / No (0)
Yes (1) / No (0)
Yes (1) / No (0)
Yes (1) / No (0)
Yes (1) / No (0)
0 – 10 V control active?
(Option)*
P95
Frost protection
(standard or preheater) active?
Extractor
P96
(Option)* hood control active?
P97 Moisture control active?
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2.4 Use of the Switch(es) (Option)
Leave the MTD-ERV 350 at the highest position for some time after cooking and
showering to remove excess moisture and odours as quickly as possible.
If several position switches are installed in the apartment, the MTD-ERV 350 adjusts
as far as the ventilation is concerned to the highest ventilation position unless
other values are set in an automatic software control.
2.4.1 Setting Ventilation Using 3-position Switch(es)
A 3-position switch allows 3 ventilation levels to be set.
•
•
•
Position 1 Low.
- Use for a low ventilation requirement.
Position 2 Normal.
- Use for a normal ventilation requirement.
Position 3 High.
- Use this level during cooking, showering and when additional ventilation is re-
quired.
2
1
3
The CC Ease operating unit allows an additional ventilation level, the absence level, to be
set in addition to these 3 ventilation levels. For further information, see section 2.3.3.
2.4.2 Setting Ventilation Using Bathroom Switch(es)
A bathroom switch allows the MTD-ERV 350 to be temporarily set to the highest ventilation level (position 3):
•
•
Actuate the bathroom switch for maximum ventilation.
Actuate the bathroom switch again to return to the normal (or previously set) ventilation level.
You can set an activation and deactivation delay for the bathroom ventilation control in P
menus P21 and P22. For further information, see section 2.3.7.
The bathroom ventilation control can also be integrated into the bathroom light switch.
2.5 Service by the User
As user you have to service the MTD-ERV 350 as follows:
•
•
Clean or replace the filters.
Clean the valves (in the home).
These measures are described in more detail briefly in the following sections.
If these measures are not performed (regularly), there is a danger that the ComfoAir 350
will cease to function correctly.
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2
2.5.1 Cleaning or Replacing Filters
As soon as the corresponding warning appears
on the display of the CC Ease operating unit, the
filters have to be cleaned or replaced.
•
•
“ FILTER I ” ! The internal filters must be
cleaned or replaced.
“ FILTER E ” ! The external filters* must be
cleaned or replaced.
B
One of the filter indications shown above then ap-
pears on the CC Ease display.
•
•
•
Push the filters (A) back into
the MTD-ERV 350.
Insert the plug of the MTD-ERV 350 into the
plug socket again.
Press "
" to cancel the filter indication.
For replacement ...
As soon as the filters have to be replaced, proceed
as follows:
•
•
Remove the mains plug from the plug socket.
The internal filters are supplied as stand-
ard with the MTD-ERV 350.The external
filters* form part of the duct system of
the ventilation system and do not belong
to the MTD-ERV 350.
Pull the filters (A) out of the MTD-ERV 350.
The MTD-ERV 350 is equipped as standard with
two internal filters. The external filters* form part
of the duct system of the ventilation system and
do not belong to the MTD-ERV 350. Should your
ventilation system be equipped with external fil-
ters, the monitoring of these filters must be con-
nected to the PCB panel (extended version) of
the MTD-ERV 350.
A
A
•
•
Remove the clamps (C) holding the two filter
cloths to the filter brackets.
Push the filter cloths (D) off the filter brackets
(F).
Monitoring of the external filters* must
be connected to the PCB panel (extend-
ed version) of the MTD-ERV 350 by the
installer.
C
For cleaning ...
You can clean the filters when necessary:
D
•
•
Remove the mains plug from the plug socket.
Pull the filters (A) out of the MTD-ERV 350.
Ensure that the cloth is not damaged by
the corners of the filter bracket.
A
A
Before putting the MTD-ERV 350 into op-
eration the first time, you should clean
the filters (and the valves) because the
ventilation system may have been soiled
with building dust during the building
phase.
•
Clean the filters (B) using a vacuum cleaner.
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•
Push the new filter cloths (E) over the filter
brackets (F).
Ensure that you ALWAYS install all the
valves in exactly the same position (and
in the same ventilation slot in the wall
or ceiling) after cleaning, otherwise opti-
mum operation of the ventilation system
cannot be assured.
•
•
Fasten the clamps (C) again.
Pushthefilters(A)backintotheComfoAir350.
The ventilation air is admitted and discharged via
valves. Gaps under the doors in the dwelling en-
sure that the air circulates in the right direction. In
order to ensure that the right volume of ventilation
air is maintained in the right rooms, pay attention
to the following points:
E
F
•
•
•
Do not seal the gaps.
Do not change the setting of the valves.
Do not interchange the valves.
•
•
Insert the plug of the MTD-ERV 350 into the
plug socket again.
Press "
" to cancel the filter indication.
2.6 Malfunctions
Replace all filters (at least) once a year.
A malfunction in the MTD-ERV 350 is displayed as
follows:
•
A malfunction indication appears on the dis-
play of the CC Ease.
The malfunction LED on the 3-position switch
lights up.
2.5.2 Cleaning Valves (in the Home)
The ventilation system is equipped with the follow-
ing valves:
•
Thesemeasuresaredescribedinmoredetailinthe
following sections.
2.6.1 MalfunctionindicationontheCCEase
Exhaust air valve (STB)
Exhaust air valve (STC)
Display
In the event of a malfunction, a malfunction code
appearsontheCCEasedisplay.Thedisplaythenal-
waysshowsan'A'or'E'codewiththecorresponding
numbers. By referring to the overview of malfunc-
tionsinsection4.7.1, youcanfindoutwhatthepar-
ticular malfunction indication means.
Exhaust air valve (STV)
Exhaust air valve (STK)
Supply air valve (STH)
These valves have to be cleaned (at least) twice a
year.
•
•
•
•
Remove the valve from the wall or ceiling.
Clean the valve in a warm soap solution.
Rinse the valve thoroughly and dry it carefully.
InstallthevalveagainEXACTLYINTHESAME
POSITION (and IN THE SAME HOLE).
Repeat this procedure for the other valves.
2.6.2 3-positionSwitchwithMalfunctionLED
In the event of a malfunction, 3-position switches
with a malfunction LED start to light up.Depending
on the type of 3-position switch, this takes place in
one of two ways:
•
•
3-position switch with malfunction LED.
On the position of the valves ...
Theinstallerhassetallthevalvessothattheventila-
tion system operates optimally with respect to the
volumetric air flows. Do not therefore change the
setting of the valves.
" ! The LED lights up in the event of a mal-
function (and in the event of a filter warning).
Wireless 3-position switch with malfunction
LED.
•
" ! The LEDs light up as soon as the 3-posi-
tion switch is used. The LED lights up
green once to signal that a communication
has been made. In the event of a malfunc-
tion or a 'Filter dirty' warning, both LEDs light
up red three times. Finally both LEDs light
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2
up green again.
The malfunction LED on the 3-position
switch lights up not only in the event of
malfunctions, but also in the event of a
'Filter dirty' warning.
2.6.3 What to Do in the Event of a
Malfunction?
In the event of a malfunction, please contact the in-
staller. Note the malfunction code that appears on
thedisplayoftheCCEaseoperatingunit.Alsonote
yourMTD-ERV 350type.Itcanbefoundontheiden-
tification plate on the top of the MTD-ERV 350.
The plug must always remain in the plug socket as
long as the MTD-ERV 350 does not have to be shut
down due to a serious malfunction, for filter clean-
ingorreplacementorforsomeotherurgentreason.
Iftheplugweretoberemovedfromtheplugsocket,
thedwellingwouldnolongerbemechanicallyventi-
latedandmoistureaswellasfungusproblemscould
occur in the longer term. Avoid at all costs leaving
the MTD-ERV 350 switched off for prolonged peri-
ods.
2.7 End of Service Life
Discuss with your supplier what you should do with
yourMTD-ERV 350attheendofitsservicelife.Ifyou
cannotreturntheMTD-ERV 350toyoursupplier,do
notsimplythrowitaway;contactyourlocalauthori-
ties to find out about possibilities of re-using com-
ponentsortheenvironmentallysaferecyclingofthe
materials.
•
Do not throw the batteries of the wireless
switches into the domestic refuse; dispose of
them at the official waste collection point.
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3 Function of the System
ThischapterdescribesthedesignofthebalancedventilationsystemanditsfunctioninconjunctionwiththeMTD-
ERV 350.
3.1 Components of the Balanced Ventilation System
The complete balanced ventilation system consists of the following components:
·
MTD-ERV 350 with CC Ease operating unit
with software prepared for the connection of
the following options:
- Preheater.
- Enthalpy exchanger (heat and moisture
recovery).
- 3-position switch without malfunction and
filter display or 3-position switch with mal-
function and filter display.
- Wireless 3-position switch(es).
- Bathroom switch.
·
Options that can only be connected to the
MTD-ERV 350 Luxury versions.
- Exhausting via extractor hood.
- Post-heater in duct system.
- Sensors with 0 – 10 V control (2x).
- Moisture sensor in living areas of the
dwelling.
- Geothermal heat exchanger.
-Chimney sweep control with pressure
sensor in the chimney.
- Malfunction indication (with signal) (see
wiring diagram).
- Sensors with 0 – 10 V control (2x).
- ComfoControl Avignon (touch screen
remote control with additional operating
options compared with the CC Ease op-
erating unit).
·
Duct system.
- Supply and exhaust air duct system.
- Supply and exhaust air valves.
These components/functions of the ventilation system are described in the following sections.
3.2 Controlled Ventilation System
A balanced ventilation system generally consists of the following elements:
·
·
·
·
·
MTD-ERV 350 (A).
Duct system for the intake of outside air (B) and the discharge of indoor air (C).
Air supply valves in the living rooms and bedrooms (D).
Exhaust air valves in the kitchen, bathroom, toilet and possibly the store room (E).
Non-powered extractor hood with 3-position switch (F).
B
C
A
D
D
E
D
E
D
E
F
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3
3.3 MTD-ERV 350
The MTD-ERV 350 consists as standard of the following components:
·
·
·
·
·
·
Outer casing (A) of coated sheet steel.
Inner lining (B) of high-quality expanded polypropylene (E)PP.
4 rotatable air-side connections (C) for the air ducts.
2 G3 filters (D) for air filtration.
2 energy-saving DC motors (E) with high-speed impeller.
(High-efficiency) heat exchanger (with optional moisture exchanger) (F) with a thermal efficiency ex-
ceeding 95% in which moisture as well as heat is recovered from the exhaust air.
CC Ease operating unit (G) for reading off data and for settings.
PCB panel (H2) with connections for the CC Ease operating unit, the enthalpy exchanger and the sen-
sors with 0 - 10 V controller (2x).
·
·
·
PCB panel (H1) with connections for the fans, bypass, preheater, temperature sensors (T1 to T4), 3-po-
sition switch with or without malfunction and filter display (option) and the bathroom switch (option).
Identification plate (I) with the data on the MTD-ERV 350 (not visible).
Condensation drain (J) for discharging the condensation from the warm exhaust air.
Sticker (K) with the air connections (not visible).
·
·
·
·
230 V plug (L).
L
K
I
C
C
H2
C
C
D
A
H1
D
E
F
E
B
G
J
18 Function of the System
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MTD-ERV 350 Methods of Operation
The MTD-ERV 350 has been designed and produced as a system for controlled ventilation of residential buildings. It
comprises two air flows that hygienically exchange their energy.
E
G
A
I
C
H
Filter
J
F
B
D
·
Polluted air is drawn off by the exhaust air fan (A) from,
for example, the kitchen, toilet and shower (B).
·
·
·
·
The heat exchanger (C) absorbs the heat from the exhaust air.
The supply air fan (D) draws in fresh air from outside (E).
The heat exchanger (C) heats up the intaken air using the heat absorbed from the exhaust air.
If a moisture exchanger is installed (option), moisture is also transferred from the exhaust air to the sup-
ply air (for further information, see section 2.1.6).
·
·
·
The heated fresh air is delivered into the living rooms and bedrooms (F).
The now cooled polluted air from the kitchen, bathroom and toilet is discharged into the atmosphere (G).
The bypass (H) allows the exhaust air to be discharged to the atmosphere without passing through the
heat exchanger so that no heat is transferred to the fresh air (for further information, see section 2.1.3).
The preheater (I) (option) ensures preheating of outside air so that balanced ventilation with heat recov-
ery is assured even with moderate to severe frost (up to 150 m³/h at -15° C) (for further information, see
section 3.4.2).
·
·
The post-heater (J) (option) additionally heats the supply air (after it has already been heated in the heat
exchanger) before it is delivered into the living rooms (for further information, see section 3.4.3).
The balanced ventilation system contributes to energy saving, a healthy room climate and an optimum living climate
and prevents problems with moisture.
3.4. Additional Options
Only for MTD-ERV 350 Luxury versions, with the exception of the preheater that can be installed in any MTD-
ERV 350.
Please refer to the identification plate on the top of the MTD-ERV 350 to determine whether you have
a basic or luxury version of the system.
These are external devices that can be connected to the MTD-ERV 350 Luxury versions (preheater
also to Basic versions).
3.4.1. Preheater in MTD-ERV 350
All MTD-ERV 350 systems with “VV” in the device name (see identification plate on the top of the MTD-ERV
350) are equipped as standard with a preheater. All other MTD-ERV 350 versions can be equipped with a pre-
heater as an option.
The preheater is a heating element that is in-
stalled in the outside air duct of the MTD-ERV 350
just upline of the heat exchanger. The preheater
heats the cold outside air before it reaches the
heat exchanger in the event of moderate to se-
vere frost. In this way the heat exchanger is pro-
tected against freezing in addition to the standard
frost protection system.
The advantage of the preheater compared with the
standard frost protection system is that balanced
ventilation can be maintained even in the event of
frost. In the event of a frost risk, the intake of out-
Function of the System 19
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3
side air no longer has to be temporarily reduced (or
even interrupted for a short time) in order to pre-
vent condensation freezing in the heat exchanger.
Instead the preheater is temporarily switched on.
In addition, this option offers greater comfort as
the supply air is preheated to more or less room
temperature.
In addition to this ventilation via the extractor
hood, a temperature sensor is also installed in
the extractor hood. This temperature sensor
measures the temperature of the air discharged
via the extractor hood. Should this temperature
become too high, i.e. more than 60 oC, the valve
in the extractor hood will close to protect the
MTD-ERV 350 and in particular the heat/moisture
exchanger.
The preheater is switched on and off automati-
cally. As soon as the temperature of the outside
air is below 0 oC for a certain period, the air duct
of the preheater is opened and the preheater is
switched on to heat the intaken outside air to at
least 1 oC. Here a temperature sensor in the sup-
ply air duct of the MTD-ERV 350 measures the
temperature. This preheating control ensures bal-
anced ventilation up to a maximum of 150 m³/h at
3.4.3 Post-heater* in Duct System
As an option, the ventilation system can also be
equipped with a post-heater.
The post-heater is a heater element that is in-
stalled in the duct system of the ventilation sys-
tem, in other words downstream of the MTD-ERV
o
-15 C. The user cannot influence the automatic
preheater control. The installer has to modify the
preheating control, for example during installa-
tion of the MTD-ERV 350, in menu P52 via the CC
Ease operating unit (for further information, see
section 4.4).
Menu P29:
Setting the rate of increase
Minimum
Standard
Maximum
1%
v
v
v
Rate of increase
Rate of increase
Rate of increase
10%
99%
The preheater and the corresponding
temperature sensor must be connected
to the PCB panel behind the front panel
of the MTD-ERV 350 by the installer. In
the event of retrofitting, installation in-
structions are supplied with the installa-
tion kit.
350. The post-heater
ensures that after the
outside air has first
been heated in the
heat/moisture
ex-
changer of the MTD-
ERV 350, the sup-
ply air is additionally
heated before it en-
ters the living rooms.
The advantage of the
3.4.2. Ventilation via Extractor Hood*
An extractor hood can be connected to the MTD-
ERV 350.
This allows moisture (steam) and food odours
to be discharged as quickly as possible via the
ventilation system. For this, the extractor hood
must be connected to the PCB panel (extended
version) of the MTD-ERV 350. The extractor hood
can then be operated via the CC Ease operating
unit of the MTD-ERV 350.
post-heater is that the supply air can be directly
admitted to the living rooms at the comfort tem-
perature set for the dwelling. That means addi-
tional comfort.
The post-heater is not supplied as stand-
ard with the MTD-ERV 350. It is actually
part of the duct system of the ventilation
system and does not belong to the scope
of supply of the MTD-ERV 350.
Switching the extractor hood on and off,
see section 2.3.4.
The post-heater is switched on and off automati-
cally. As soon as the temperature of the supply
air drops below the set comfort temperature, the
post-heater is switched on to heat up the supply air
to the comfort temperature. A temperature sensor
As soon as the extractor hood is switched on
using the CC Ease operating unit, the valve of
the extractor hood opens and the MTD-ERV 350
switches to the 'Extractor hood' function. Ventila-
tion positions 1, 2 or 3 can be set. These ventila-
tion positions for the extractor hood correspond
to the 'normal' ventilation positions. Please note,
however, that these ventilation positions for the
extractor hood are always slightly higher (by x%)
than the 'normal' ventilation positions. The user
can set this x% value himself in menu P29 on the
CC Ease operating unit (see also section 2.3.7).
The following increase values can be selected:
in the duct system measures the temperature of
the supply air immediately behind the post-heat-
er. The user cannot influence the automatic post-
heater control system. The post-heater reacts to
20 Function of the System
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the set comfort temperature. This temperature
can, however, be altered by the user (for further
information, see section 2.3.2). The installer sim-
ply has to indicate whether or not a post-heater
has been integrated into the ventilation system
in menu P55 of the CC Ease operating unit dur-
ing installation of the MTD-ERV 350 (for further
information, see section 4.4).
air fan, and (b) the old air is drawn off faster by the
exhaust air fan. As soon as the CO2 concentra-
tion in the house has reached acceptable values
again, the settings of the two fans are gradually
reduced again.
The CO2 sensor must be connected to
the PCB panel in the electronics casing
on the top of the MTD-ERV 350 by the
installer.
The post-heater and the corresponding
temperature sensor must be connected
to the PCB panel (extended version) of
the MTD-ERV 350 by the installer.
3.4.5. RH Sensor* in the Home
A RH sensor can be connected to the MTD-ERV
350.
3.4.4 CO2 Sensor* in the Home
A CO2 sensor can be connected to the MTD-ERV
350.
This RH sensor allows the MTD-ERV 350 to regu-
This CO2 sensor allows the MTD-ERV 350 to
regulate the CO2 concentration in the house. For
this, a CO2 sensor is installed in one of the living
rooms to measure the current CO2 concentration
in the indoor air.
Living space
Living space
late the relative humidity in the house. For this, an
RH sensor is installed in one of the living rooms to
measure the current relative humidity of the indoor
air.
Living space
Living space
If the humidity is too high compared with the set
(and hence highest admissible) humidity, the set-
tings of the supply and exhaust air fans will be
gradually increased to reduce the humidity. Living
rooms with an excessively high humidity, such as
bathrooms during showering, are quickly freed of
the humidity by the additional ventilation. Prob-
lems due to high humidity can thus be avoided in
this way. The user can set the maximum admis-
sible humidity (within the given limits) manually in
menu P28 via the CC Ease operating unit (see
also section 2.3.7). The following humidity levels
can be selected:
If the CO2 concentration is too high compared
with the set (and hence highest admissible) CO2
concentration, the settings of the supply and ex-
haust air fans will be gradually increased to re-
duce the CO2 concentration. In this way the air
in rooms with a high carbon dioxide concentra-
tion that can occur, for example, during a party
with a large number of people, can be quickly 'ex-
changed' by additional ventilation. The user can
set the maximum admissible CO2 content (within
the given limits) himself in menu P27 via the CC
Ease operating unit (see also section 2.3.7). The
following CO2 concentrations can be set:
Menu P28:
Setting the humidity level
Minimum
Standard
Maximum
0%
60%
v
v
v
Humidity level
Humidity level
Humidity level
Menu P27:
Setting CO2 concentration
100%
Minimum
Standard
Maximum
ppm to be decided
ppm to be decided
ppm to be decided
v CO2 concentration
v CO2 concentration
v CO2 concentration
The starting point
for this humidity
control is the as-
sumption that the
outside air is gen-
erally the dry (dri-
er) air. The humid-
ity can be reduced
by this system in
that (a) dry air is
The
starting
point for this
CO2 control is
the assumption
that the outside
air is generally
the fresh(er) air.
The CO2 con-
centration can
be reduced by
this system in
drawn in faster with the supply air fan, and (b) the
humid air is drawn off faster by the exhaust air
fan. As soon as the humidity in the dwelling has
reached acceptable values again, the settings of
the two fans are gradually reduced again.
that (a) fresh air is drawn in faster with the supply
Function of the System 21
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3
can modify the automatic control of the geother-
mal heat exchanger to a slight extent in menu
P61 at the CC Ease operating unit, if necessary.
The RH sensor must be connected to
the PCB panel in the electronics casing
on the top of the MTD-ERV 350 by the
installer.
The geothermal heat exchanger and the
corresponding temperature sensor must
be connected to the PCB panel (extend-
ed version) of the MTD-ERV 350 by the
installer.
3.4.6 Underground Geothermal Heat
Exchanger*
As an option, the ventilation system can also be
equipped with a geothermal heat exchanger.
3.4.7 Chimney Sweep Control
The geothermal heat exchanger is an addition-
al underground air duct at a depth of at least 1
metre and with a length of 20 to 40 metres that
forms part of the ventilation system. The geo-
thermal heat exchanger allows the outside air to
be admitted to the house under ground instead
of above ground. The heat of the soil is thereby
given off to the outside air as it flows through the
geothermal heat exchanger.
The geothermal heat exchanger is thus an out-
standing solution both in winter and in summer.
In frosty weather, the outside air can be heated
by the underground geothermal heat exchanger
before it enters the house via the MTD-ERV 350.
During hot weather in the summer, on the other
hand, the outside air can be cooled by the un-
derground geothermal heat exchanger before it
enters the house via the MTD-ERV 350.
Apart from the chimney sweep control set as
standard in the software, an additional unit can
be connected to the PCB panel (extended ver-
sion) of the MTD-ERV 350 as an option that can
switch off the fans of the MTD-ERV 350 via a float-
ing contact.
By means of a pressure sensor installed in the
room in which the hearth to be monitored is in-
stalled, the unit measures the pressure in the
room with the hearth. The pressure in the room
in which the hearth is installed and the adjacent
rooms must not exceed - 4 Pa so that fumes and
smoke cannot enter the house. At a pressure
higher than - 4 Pa, the fans of the MTD-ERV350
are switched off. Malfunction code "E4" appears
on the display. In this case, please contact the
installation company that installed the pressure
sensor and/or the heating. There is probably a
problem with the discharge of the fumes from the
hearth.
The geothermal heat exchanger functions au-
tomatically. A temperature sensor installed any-
where on the outside of the house measures
the temperature of the outside air. As soon as
The additional unit and the correspond-
ing pressure sensor do not belong to the
standard scope of supply of the MTD-
ERV 350.
The additional unit and the correspond-
ing pressure sensor must be connected
to the PCB panel (extended version) of
the MTD-ERV 350 by the installer.
The installer cannot influence the automatic chim-
ney sweep control system. It reacts to settings at
the PCB panel (extended version) stored in the
software. The installer simply has to indicate
whether or not a chimney sweep control system
has been integrated into the ventilation system in
menu P50 of the CC Ease operating unit during
installation of the MTD-ERV 350 (for further infor-
mation, see section 4.4).
the temperature of the outside air is between 0
and 15 oC in winter months and between 10 and
25oC in summer months, the geothermal heat
exchanger is activated to allow the outside air to
flow through the heat exchanger. The user can-
not influence the automatic geothermal heat ex-
changer control system. The installer simply has
to indicate whether or not a geothermal heat ex-
changer has been integrated into the ventilation
system in menu P60 of the CC Ease operating
unit during installation of the MTD-ERV 350 (for
further information, see section 4.4).The installer
22 Function of the System
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3.5. Technical Specifications
MTD-ERV 350 nL (normal Air Volume)
Position
Absent
Low
Ventilation rate
Value
at
at
at
at
at
Medium
High
Maximum
Power supply
Supply voltage
Power factor (cos phi)
Noise output supply air fan
Position
Ventilation rate
Value
Absent
Low
at
at
at
at
at
Medium
High
Maximum
Noise output exhaust air fan
Position
Absent
Low
Ventilation rate
Value
at
at
at
at
at
Medium
High
Maximum
Function of the System 23
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3
MTD-ERV 350 nL (normal Air Volume)
Position
Absent
Low
Ventilation rate
Value
at
at
at
at
at
Medium
High
Maximum
Power supply
Supply voltage
Power factor (cos phi)
Noise output supply air fan
Position
Ventilation rate
Value
Absent
Low
at
at
at
at
at
Medium
High
Maximum
Noise output exhaust air fan
Position
Absent
Low
Ventilation rate
Value
at
at
at
at
at
Medium
High
Maximum
General specifications of the MTD-ERV 350
HE exchanger material
Polystyrene
Inner lining material
Heating capacity
Weight
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3.6 Dimension Sketch
Function of the System 25
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3
4 Instructions for the Installer
This chapter describes how you have to install the MTD-ERV 350.
4.1 Preconditions for Installation
In order to be able to assess whether the ComfoAir
350canbeinstalledinaparticularroom,pleasepay
attention to the following points:
4.2 Installation of the MTD-ERV 350
4.2.1 Transport and Unpacking
•
Work carefully when transporting and unpack-
ing the MTD-ERV 350.
•
The MTD-ERV 350 must be installed in accord-
ance with the local safety regulations and in-
stallation instructions of i.a. the public utilities,
and in accordance with the instructions in this
manual.
Ensure that the packaging materials are
disposed of in an environmentally favourable
manner.
•
•
Theinstallationlocationmustbeselectedsuch
that there is sufficient space around the MTD-
ERV 350 for air connections and for carrying
out maintenance work.
The following installations must be present in
the room:
4.2.2 Checking the Scope of Supply
Should you discover any damage or missing parts
of the supply product, please contact your supplier
without delay. The scope of supply includes:
-
-
Air duct connections.
230 V power supply with fused wall plug
socket.
•
•
MTD-ERV 350.
Check the identification plate to see whether it
is the correct type.
-
Installations for condensation drainage.
•
•
•
4 x 45° connection elbows.
Mounting brackets.
Operating Manual.
•
Roof openings must be air and vapour-tight.
The outside air and exhaust air ducts must be
insulated vapour-tight between the roof/gable
opening and the MTD-ERV 350.This prevents
the formation of condensation on the outside
of the ducts.
The MTD-ERV 350 is available in the following
types:
•
•
•
•
The exhaust air duct must have a double-
walledorinsulatedroofopening.Thisprevents
the formation of condensation between the
layers of the roof.The exhaust air duct must be
laid with a gradient towards the MTD-ERV 350.
The MTD-ERV 350 must be installed in a frost-
free room. The condensation must be dis-
charged frost-free, with a downward gradient
andusingasiphon.TheMTD-ERV 350mustbe
firmly connected to the siphon.
The MTD-ERV 350 may only be connected to a
non-powered extractor hood. Any other type
of extractor hood system would interfere with
the basic function of the balanced ventilation
system.
Type
MTD-ERV 350 L
MTD-ERV 350 R
MTD-ERV 350 L VV
MTD-ERV 350 R VV
MTD-ERV 350 L Luxe
MTD-ERV 350 R Luxe
Type
MTD-ERV 350 L Luxe VV
MTD-ERV 350 R Luxe VV
MTD-ERV 350 L Luxe CC
MTD-ERV 350 R Luxe CC
MTD-ERV 350 L Luxe CC VV
MTD-ERV 350 R Luxe CC VV
We recommend that silencers are installed
on both the air intake and air discharge sides
of the MTD-ERV 350. For further information,
please contact your supplier.
Meaning of the suffixes:
In order to ensure a good and draught-free
ventilation of the dwelling, gaps were deliber-
ately left under the inside doors.If these gaps
aresealed,forexamplewithdoorsealsorhigh-
pile carpets, the ventilation in the apartment
will stagnate. This would prevent the system
from operating optimally.
•
•
•
•
L
R
VV
=
=
=
Left.
Right.
Preheater.
Luxe = Refers to the extended version of
the PCB panel.
CC
•
=
ComfoControl Avignon. This is the
touchscreenremotecontrolwithad-
ditional operating options compared
with the CC Ease operating unit.
26 Function of the System
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NospaceisrequiredtothesidesoftheMTD-ERV 350
for its proper operation.
Exhaust air
Supply air
Stale air
Do not install the MTD-ERV 350 with a side
against a wall to avoid possible contact
noise.
Outside air
4.3.1 Connection of the Air Ducts
ComfoAir 350 – LEFT
Outside air
Stale air
Intake air
Exhaust air
Installasuitablesilencerdirectlyattheairintakeand
airdischargeconnections.Informationonsilencers
is available from your supplier.
The air ducts to be connected, minimum diameter
150mm,mustbeinstalledwithaslittleairresistance
as possible and air tight.
ComfoAir 350 – RIGHT
•
•
Insulate the outside air duct and the stale air
duct vapour-tight between the roof/gable
opening and the MTD-ERV 350. This prevents
the formation of condensation on the outside
of the ducts.
4.3 Wall Mounting
Install the exhaust air duct with a gradient to-
wards the MTD-ERV 350.
4.3.2 ConnectionoftheCondensationDrain
Install the MTD-ERV 350 on a wall with a load-bear-
ing capacity of at least 200 kg/m².
Connection
Forotherwallswerecommendtheuseofabasefor
installation on the floor (available as an option, see
section 4.8 with service parts).This helps to avoid
the transmission of structure-borne noise.
•
Fasten the supplied mounting bracket to the
wall horizontally.
LEFT
MTD-ERV 350
•
Connectthecondensationdrain(notsupplied)
totheundersideoftheMTD-ERV 350.Thevalue
shown of 235 mm is only an indicative value.
The actual value depends on the type of con-
densationdrainselected,seealsosection4.3.2
for the connection of the condensation drain.
Ensure that at least 1 metre of space is left in
frontoftheMTD-ERV 350forlatermaintenance
work.
•
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4
CommissioningcanbecarriedoutwiththePmenus
viatheCCEaseoperatingunit.ThesePmenusallow
varioussettings(inparticularforventilationcontrol)
tobeselectedfortheMTD-ERV 350.Anoverviewof
the available P menus is given below:
Connection
n
Menu Possibilities
MTD-ERV 350 RIGHT
P1
P2
Read off the status (from menu P2)
Set time delays (and indication “FILTER
DIRTY” and setting values for extractor
hood and sensors)
Thewarmexhaustairiscooledbytheoutsideairin
the heat exchanger. As a result, the moisture con-
tained in the room air condenses in the heat ex-
changer.The condensation forming in the heat ex-
changerisdischargedviathecondensationtrayinto
the condensation drain.
P3
P4
Setting the ventilation levels
Read off the temperature, relative hu-
midity and CO2 concentration.
P5
P6
P7
Setting additional control functions
Setting additional control functions
Read off and reset malfunctions (and
system information)
Setting 0-10 V connections
Read off the status (from menu P5)
The connection for the condensation drain has an
outside diameter of 32 mm.This is located on the
underside of the MTD-ERV 350.
•
•
•
Connect the condensation drain to the water
lock of the home drainage system using a pipe
or hose.
Position the upper edge of the water lock at
least 40 mm below the condensation drain of
the MTD-ERV 350.
P8
P9
ThePmenusP1,P2andP9areaccessiblefortheuser
andservemainlyforreadingoffstatusesandforset-
tingtimedelays.Forfurtherinformation,seesection
2.3.7.TheremainingPmenusP3toP7arereserved
exclusively for the installer.
Ensure that the end of the pipe or hose ends
under the water level.
Ensure that the water lock of the connec-
tion to the house sewage system is always
filled with water.
In the P menus the user may:
- only set the additional functions P1,
P2 and P9.
The remaining P menus P3 to P7 are re-
served for the installer.
Ensure that the hose end terminates at
least 60 mm below the water level. This
will prevent the MTD-ERV 350 from draw-
ing in air.
4.4 Commissioning the MTD-ERV 350
The MTD-ERV 350 can be put into operation after
installation.
Access to the P menus
Proceed as follows:
1
2
Press simultaneously on "
".
" and
"
Wait until the "P menu" appears on the display.
The P menus P1, P2 and P9 are now
accessible.
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"
".
10 Press "
" to confirm the value.
11 Repeat steps 7 to 10
to set several parameters in turn in
the same P menu.
Or
Return to the P menu: Press "
Or
" once.
3
4
Press
"and"
"
"simultaneouslyfor2seconds.
Return to the main window
Wait until the "P menu" P3 appears on the dis-
play.
The P menus P3 to P8 are now acces-
sible.
1
Press "
" twice.
5
6
Select with "
" or "
" the desired P
menu, e.g. " 5 ".
Press "
" to confirm the P menu.
7
8
Selectwith"
"or"
"thedesiredPsub-
menu, e.g. " 51 ".
Press "
" to confirm the P sub-menu.
Making settings in the P menus
The minimum and maximum
values for the available
setting parameters are
stored in the software.
9
Select a value for the parameter with "
" or
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4
Menu P3 ! Set ventilation controls
Values for ventilation controls
Sub-menu
Description
Minimum
Maximum
Standard
P30
Settingthepower(in%)oftheexhaustair 0%
fan in position "Absent".
97%
Normal / High
15% / 15%
P31
P32
P33
P34
P35
P36
P37
P38
P39
Settingthepower(in%)oftheexhaustair 16%
fan in position "Low".
Settingthepower(in%)oftheexhaustair 17%
fan in position "Medium".
Settingthepower(in%)oftheexhaustair 18%
fan in position "High".
Setting the power (in %) of the supply air 0%
fan in position "Absent".
Setting the power (in %) of the supply air 16%
fan in position "Low".
Setting the power (in %) of the supply air 17%
fan in position "Medium".
Setting the power (in %) of the supply air 18%
fan in position "High".
98%
99%
100%
97%
98%
99%
100%
-
Normal / High
35% / 40%
Normal / High
50% / 70%
Normal / High
70% / 90%
Normal / High
15% / 15%
Normal / High
35% / 40%
Normal / High
50% / 70%
Normal / High
70% / 90%
Current %
Current power (in %) of the exhaust air
fan.
-
Current power (in %)
of the supply air fan.
-
-
Current %
Menu P4 ! Read off the temperatures (% and ppm)
Read off the temperatures (% and ppm)
Sub-menu Description
Minimum
Maximum
Standard
Current oC
20 oC
Current ppm
Current %
Current oC
Current oC
P40
Current value of TPOST-HEATER
Comfort temperature
-
-
P41
P42
P43
P44
P45
12 oC
28 oC
Current value CO2
-
-
-
-
-
-
-
-
Current value relative humidity.
Current value of TEXTRACTOR HOOD
Current value of T1
(= temperature of the outside air)
Current value of T2
(= temperature of the supply air)
Current value of T3
(= temperature of the exhaust air)
Current value of T4
(= temperature of the stale air)
Current value of TGHE
P46
P47
P48
P49
-
-
Current oC
Current oC
Current oC
Current oC
(= temperature of the outside air for geo-
thermal heat exchanger)
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Menu P5 ! Setting additional control functions
Values for additional control functions
Sub-menu Description
Minimum
0 (= No)
Maximum
1 (= Yes)
Standard
P50
Activation of
0
0
the chimney sweep control system.
P51
Indicate whether
0 (= No)
1 (= Yes)
preheater is installed.
Note:
change only if a preheater was subsequently installed.
If the MTD-ERV 350 has to be reset to the works settings via P75, a subsequently installed
preheater will be reset as standard to "ABSENT".
•
Check the presence of the preheater after a general reset via menu P75.
P52
Setting the
0
3
2
preheater control.
v Level 0
Particularly safe setting.
v Level 1
Safe setting.
v Level 2
Nominal setting.
v Level 3
Economy setting.
Note:
ThePREHEATERISSWITCHEDONEARLIESTWITHTHEparticularlysafesetting.Thislevelthusoffersthe
greatest safety for maintaining balanced ventilation. On the other hand, the preheater is
switchedonthelatestintheECONOMYSETTING.Thislevelthusofferstheleastsafetyformaintain-
ing balanced ventilation.
During commissioning of the MTD-ERV350 the preheater control can generally be left on
Level 2:NOMINAL SETTING (=workssetting).Onlyinareaswithcoldwinters(withdaytimetem-
peraturesregularlyapprox.-10°Corbelow)shouldLevel1:SAFESETTINGorevenLevel0:PARTICU-
LARLY SAFE SETTINGS be selected.
Values for additional control functions
Sub-menu Description
Minimum
Maximum
Standard
P53
Indicate presence of an extractor hood. 0 (= No)
1 (= Yes)
0
Note:
If an extractor hood is connected to the
ventilation system, the user can set the
ventilation levels for the extractor hood
via P29.
P54
Indicate presence of a bypass.
0 (= No)
0 (= No)
1 (= Yes)
1
0
Note:
The MTD-ERV 350 is equipped with a by-
passasstandard.Thevaluecantherefore
be left at '1'.
Indicate presence of a post-heater.
Setting the necessary air volume for the nL
dwelling.
P55
P56
1 (= Yes)
HL
nL
•
•
nL: "Normal air volume".
HL: "High air volume".
Note:
SettingtheairvolumeinP56(to"nL"or"HL")formsthebasisforsettingtheairspecifications
and hence for setting the fans. For further information, see section 4.5 and P30 to P37.
Instructions for the Installer 31
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4
Values for additional control functions
Minimum Maximum Standard
Re
Sub-menu Description
P57 Setting the MTD-ERV 350 Type.
Li
Li
•
•
Li = Left-hand version.
Re = Right-hand version.
Note:
The MTD-ERV 350 is set correctly at the
factory.
•
Referalsototheidentificationplatefor
these data.
P58
Setting the fan type.
0
2
0
(Not yet avail-
able)
•
•
•
0 = Standard.
1 = Constant volume.
2 = Constant pressure.
Note:
The MTD-ERV 350 is set correctly at the
factory.
•
Constantvolumeorconstantpressure
fans cannot be installed subsequently.
P59
Enthalpy exchanger installed
0 (= No)
1 (= Yes) with 2 (= Yes) with-
moisture sen- out moisture
sor
sensor
Menu P6 Setting additional control functions
Values for additional control functions
Sub-menu Description
Minimum
Maximum
Standard
P60
Indicate presence of a
geothermal heat exchanger (GHE).
0 (= No)
1 (= Yes)
0
P61
Setting the percentage that the sup- 0%
ply air fan must run higher when
the valve of the geothermal heat ex-
changer (EWT) is open.
99%
0%
P62
P63
P64
Tghe, low
Tghe, high
Tnaheater, desired
0%
10%
5%
15%
25%
40%
7%
23%
18%
Menu P7 ! Read off malfunctions (and system information)
Values (malfunction) information
Minimum Maximum Standard
Software version number
Code corresponding to alarm and malfunction
display (see section 4.7)
Code corresponding to alarm and malfunction
display (see section 4.7)
Code corresponding to alarm and malfunction
display (see section 4.7)
Sub-menu Description
P70
Current software version.
Last malfunction.
P71
P72
P73
P74
Last malfunction but one
Last malfunction but two
Reset a malfunction on the
MTD-ERV 350.
0
1
0
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Values (malfunction) information
Sub-menu Description
Minimum Maximum
Standard
P75
Complete reset.
0
0
0
• Press
"
" for 5 seconds to carry out a com-
plete reset.
A complete reset returns all settings to
the original works settings.
After a complete reset, the MTD-ERV 350 prompts you to enter“nL / HL”(see P56)
and “Li / Re” (see P57) again.
Afteracompletereset,allsettingsinmenusP2andP3andtheexistingcontrolsP5
and P6 have to be made again.
If the MTD-ERV 350 is equipped with a preheater, this must be logged in again in
menu P51, as it is set to "Logged out" as standard after a complete reset.
P76
Self-test of the MTD-ERV 350.
0
1
0
Explanation
TheMTD-ERV 350switchestothehighestlevelimmediatelyafteractivationoftheself-test.Inaddi-
tion,thebypassvalveopensandclosesimmediatelyafteractivationoftheself-test.Ifthisself-testis
completed without malfunctions, the valve of the preheater (if installed) then opens and closes.
Menu P8 Open-loop and closed-loop control
Selection between open-loop and closed-loop control
Sub-menu Description
P80
P81
P82
P83
P84
P85
0= Open-loop control 1 = Closed-loop control (by analogy with input 1)
0= Open-loop control 1 = Closed-loop control (by analogy with input 2)
Min. setting by analogy with input 1
Max. setting by analogy with input 1
Min. setting by analogy with input 2
Max. setting by analogy with input 2
Max
Min
0 V
10
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4
tionssothattheyareallintheminusrange.
Ensure also that a supply and an exhaust
valve remain fully open.
4.5 Setting the Air Specifications
The MTD-ERV 350 must be set after installation.
This can be performed using the air specifica-
tions of the MTD-ERV 350 shown above.
•
Change the fan settings in the P menus P30 to
P37 via the CC Ease operating unit.
v
Setting the normal air volume ‘nL’ corre-
sponds to the presetting of the G 90.
Setting the normal air volume ‘nL’ corre-
sponds to the presetting of the G 91.
–
–
Select the lowest possible setting in or-
der to minimise energy consumption.
Ensure thattheratiooftheairvolumesbe-
tween high, medium and low remains the
same.
v
The standard settings of the MTD-ERV 350, nL,
are as follows:
Use the MTD-ERV 350 air specification
diagram for setting the fans.
Position ABSENT
Position LOW
Position MEDIUM
Position HIGH
15%
35%
50%
70%
•
If the previously set air volumes still differ
too much:
–
Adjust the valves further.
•
•
Checkthewholesystemagainafteradjustment
of all the valve stages.
Switch the MTD-ERV 350 (back) to ventilation
position 2.
ThestandardsettingsoftheComfoAir350,HL,are
as follows:
Position ABSENT
Position LOW
15%
40%
70%
90%
4.6 Maintenance by the Installer
AsinstalleryouhavetoservicetheMTD-ERV 350as
follows:
Position MEDIUM
Position HIGH
•
•
Inspect the heat exchangers and fans
Clean the filter if a preheater is installed.
TosettheMTD-ERV 350(afterinstallation),proceed
as follows:
•
Switch the MTD-ERV 350 to the setting mode.
Thesemeasuresaredescribedinmoredetailbriefly
in the following sections.
– Press simultaneously for two seconds on
"
" and "
".
– Wait until "InR" appears on the CC Ease
If these measures are not performed
(regularly), there is a danger that the
MTD-ERV 350 will cease to function cor-
rectly.
display.
In setting mode, bypass and preheater
are always deactivated.The MTD-ERV
350 switches the setting mode off again
automatically after 30 minutes.
4.6.1 Inspection of Heat Exchanger and
Fans
•
•
•
Close all windows and outside doors.
Close all inside doors.
Thefansandtheheatexchangermustbeinspected
every 4 years.
Checkthepresenceofaircirculationsystemsin
•
Removethemainsplug(A)fromtheplugsock-
et.
the building (at least 12 cm2 per l/s).
•
•
Pull the filters (B) out of the MTD-ERV 350.
Removethefrontplatebyremovingthescrews
(C).
Push the front plate in the direction of the ar-
row and remove it from the MTD-ERV 350.
Remove the sealing plate by removing the
screws (D).
The air circulation systems in the build-
ing must achieve at least 12 cm2 per l/s.
•
•
•
Check whether both fans function in the
three speed ranges.
•
•
Switch the MTD-ERV 350 to the high position.
Install allthevalvesandset themaccordingto
the instructions or as in the reference dwelling.
If no data are known:
–
–
–
Install the valves and open them as far
as possible.
Measuretheairvolumes,firstthesupplyair
and then the exhaust air.
differ by more than approx. 10% from the
nominal air volumes and the majority of
thedeviationsareintheplusrange,adjust
the fan so that all the deviations are in the
plus range.If the majority of the deviations
areintheminusrange, adapt allthedevia-
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A
Designated as R
B
E
G
F
C
Right-hand version
Then:
•
Removetheheatexchanger(F)fromthedrain
plate (G).
D
Caution!
There may still be water in the heat ex-
changer!
•
Clean the heat exchanger (F), if necessary.
– Immerse the heat exchanger in warm wa-
ter (max. 40° C) to clean.
– Finally rinse the heat exchanger thorough-
ly with warm tap water (max. 40° C).
– Hold the heat exchanger with both hands
at the green side surfaces and shake out
all the water.
During installation of the sealing
plate, its underside must first be
inserted behind the raised edge so
that a good seal is achieved.
Caution!
On no account should aggressive or sol-
vent-based cleaning agents be used.
MTD-ERV 350 – L
•
Pull the tape (E) to remove the heat ex-
changer (F) and the drain plate (G).
Remove the bypass duct (H) on the left-hand
version of the MTD-ERV 350.
Do not install the heat exchanger yet
(the fans can be removed, inspected and
cleaned, if necessary, in the following
steps).
•
MTD-ERV 350 – R
•
Remove thebypassduct(H)ontheright-hand
version of the MTD-ERV 350.
•
Pull thetape(E)toremovetheheatexchanger
(F) and the drain plate (G).
If an enthalpy heat exchanger is in-
stalled, observe the corresponding in-
struction.
Do not install the heat exchanger yet if the fans
are also to be inspected. The following section
describes how to remove, inspect and clean the
fans, if necessary, after the heat exchanger:
Designated as L
•
Remove the plastic plate (I) in front of the PCB
panel by loosening the two screws.
Loosentheconnectors(J)andtheearthcable
(J)atthePCBpanelandremovethecableswith
the two grommets (K) completely.
Removethecompletefancasing(L)bypressing
in the tabs (M).
Remove the inlet neck (N) by pressing in the
tabs around the fan casing.
Clean the fans (O).
G
•
E
•
•
•
B
F
Left-hand version
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4
– The bottom is secured in the electronic
carriage by 4 tabs. Two tabs are located on
the front side (visible) and two on the rear
side (not visible).
K
•
•
•
•
Clean the filter using a brush.
J
Remove any caked soiling with a damp cloth.
Install all the parts again in the reverse order.
Carryouttheself-testdescribedunderP76,see
section 4.4.
I
L
N
Install the drain plate (G) again correctly
under the heat exchanger.The holes in
the drain plate must be on the side of
the condensation drain.
O
M
Tighten the screws to a maximum
torque of 1.5 Nm.This corresponds
to roughly level 2 of a normal screw
drill.
Use a soft brush to clean
the fan blades.
Remove dust using a vacuum cleaner.
Caution!
Take care not to damage the fan blades.
Caution!
Take care not to damage the tempera-
ture sensor.
•
Install all the parts again in the reverse or-
der.
•
Carryouttheself-testdescribedunderP76,see
section 4.4.
Install the drain plate (G) again correctly
under the heat exchanger.The holes in
the drain plate must be on the side of
the condensation drain.
Tighten the screws to a maximum torque
of 1.5 Nm.This corresponds to roughly
level 2 of a normal screw drill.
4.6.2 Filter Cleaning, if Preheater is Fitted
The filter of the preheater (if installed) must be
cleaned every 4 years.
•
Removethemainsplug(A)fromtheplugsock-
et.
•
•
Pull the filters (B) out of the MTD-ERV 350.
Removethefrontplatebyremovingthescrews
(C).
•
•
•
•
Push the front plate in the direction of the ar-
row and remove it from the MTD-ERV 350.
Remove the sealing plate by removing the
screws (D).
Remove the plastic plate (I) in front of the PCB
panel by loosening the two screws.
Loosentheconnectors(J)andtheearthcable
(J)atthePCBpanelandremovethecableswith
the two grommets (K) completely.
Remove the cable (P) of the PCB panel.
Remove the bottom (Q) of the preheater.
•
•
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4.7 Malfunctions
In the event of a malfunction in the MTD-ERV 350:
A malfunction indication normally appears on the display of the CC Ease operating unit.
•
Not all malfunction indications appear on the CC Ease display, however, even when there is a malfunction (or
problem). Both types of malfunction (or problem) are described briefly in the following sections.
4.7.1 Malfunction Indications on the CC Ease Display
The following table contains an overview of the malfunction indications that are shown on the CC Ease dis-
play.
Code Description
A0
A1
NTC sensor TEWT defective.
NTC sensor T1 defective.
(= temperature of the outside air)
A2
A3
A4
NTC sensor T2 defective.
(= temperature of the supply air)
NTC sensor T3 defective.
(= temperature of the return air)
NTC sensor T4 defective.
(= temperature of the exhaust air)
A5
Bypass motor malfunction.
A6
A7
A8
A10
A11
E1
Preheater motor malfunction.
Preheater does not heat up sufficiently.
Preheater becomes too hot.
NTC sensor Tch defective.
NTC sensor Trh defective.
Exhaust air fan not running (M1).
Supply air fan not running (M2).
E2
E3
Temperature sensor extractor hood too
high.
EA1
EA2
Enthalpy sensor measures excessively
high moisture values.
No communication with the enthalpy
sensor.
Caution!
The electrical connections must not come into contact with moisture.
Pay attention during installation of the heat exchanger and drain plate that the condensa-
tion drain is on the same side as the condensation drain fitting.
Inspect the components of the condensation drain every 2 years.
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4.7.2 Malfunction indications on the CC Ease Display à Remedy
Thissectioncontainstipsonremedyingthemalfunctionsdescribedinsection4.7.1thatcanappearontheCCEase
display.
’FiL‘ ’tEr’
in display
Remove plug
from socket
Clean or
replace filter
Mount filter with the rounded
part of the handle pointing
downwards
Reinsert the
plug in the
socket
Press
until ’FiL‘ ’tEr‘ disappears
E1 / E2
CAUTION!
Exhaust air/supply air fan
Avoid contact with the PCB
malfunction
and frost protection
element due to risk
of electrocution
Remove the filter,
the plastic front cover
and the metal cover
Do the fan
connection and the PCB
register 230 VAC?
Yes
No
Then initiate the
self-test (P76 on 1)
Replace the PCB
CAUTION: Reset unit
Do the fan
and the PCB
register current
(1.5 – 10 VDC)?
No
Yes
Replace the PCB
CAUTION: Reset unit
Remove the heat exchanger
and the foam part of the
bypass and replace the fan
Left-hand or right-hand version of the MTD-ERV 350?
See illustration on plastic cover for location of PCB
ERV 350 Left: Supply fan left
ERV 350 Right: Supply fan right
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Caution!
E3
Extractor hood temperature
Avoid contact with the
PCB and frost protection
element due to risk of
electrocution
sensor too high.
Is something
cooking on the hob?
Yes
No
Turn hob off and
remove item from
heat source
Resistance OK?
Yes
No
Replace PCB
Replace
temperature sensor
Caution:
Reset unit!
Caution!
E4
MTD-ERV 350 switched off
Avoid contact with the
PCB and frost protection
element due to risk of
electrocution
via external switch
Cause depends on unit
connected to the MTD-ERV 350:
check the connected unit.
E A1
Moisture sensor registers >60%
relative humidity in exhaust air.
Consult the user;
fit standard heat exchanger??
Caution!
E A2
Cannot read out moisture
sensor
Avoid contact with the
PCB and frost protection
element due to risk of
electrocution
Connection
between sensor
and PCB OK?
Yes
No
Repair
connection
Check sensor
resistance
Resistance
OK?
Yes
No
Replace
temperature sensor
Replace PCB
Caution:
Reset unit!
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4
A1 / A2 / A3 / A4
Temperature sensor malfunction
T1 / T2 / T3 / T4
CAUTION!
Temp
Resistance [K!]
Avoid contact with the
PCB and frost protection
element due to risk of
electrocution
o
C
MIN
MED
MAX
10
15
18
19
20
21
22
25
30
19.570
15.485
13.502
12.906
12.339
11.801
11.291
9.900
19.904
20.242
Remove the plug from
the socket
15.712
13.681
13.071
12.491
11.941
11.420
10.000
8.057
15.941
13.861
13.237
12.644
12.082
11.550
10.100
8.155
Remove the filter, the plastic
front cover and the metal cover
Remove temperature
sensor from the PCB
Check temperature sensor
resistance; see table
7.959
Is resistance OK?
Yes
No
[KΩ
[°C]
Replace the PCB
Replace the
temperature sensor
CAUTION: Reset unit!
A5 / A6
Motor bypass / frost protection element
malfunction
Remove the filter,
the plastic front cover and
the metal cover
Then initiate the
self-test (P76 on 1)
Is the motor
running?
Yes
No
Check connection and PCB;
12 VDC if motor is
running (see menu P76)
Remove the motor and
the cog (incl. plastic part)
Does the
PCB register
current?
Is the cog defective?
Yes
No
Yes
No
Replace the PCB
CAUTION: Reset unit!
Replace cog
Replace motor Replace motor
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A7
CAUTION!
Malfunction
Frost protection element does
not warm up (sufficiently)
Avoid contact with the
PCB and frost protection
element due to risk of
electrocution
Remove the plug
from the socket
Remove the filter,
the plastic front cover and
the metal cover
Remove the plug of frost
protection element from the PCB
Is the resistance
of the plug of the frost
protection element
> 300 ohm?
Yes
No
Remove the heat exchanger and
the frost protection element
(and also the foam part in case
of right-hand version)
Is resistance
of T1 OK?
Yes
No
Replace the PCB
Replace T1
temperature sensor
Is the resistance of
the cable of the frost
protection element
infinite?
Yes
No
If fuse is blown,
replace cable
Check resistance of the cable
and check connections with the
frost protection element
A8
CAUTION!
Malfunction
Frost protection element gets too hot
Avoid contact with the
PCB and frost protection
element due to risk of
electrocution
Remove the filter,
the plastic front cover and
the metal cover
Does the frost protection
element flap work properly?
(Check with P76)
Yes
No
Check the following factors:
- Fan settings (too low?)
See A5 / A6 Malfunction
section “Initiate self-test”
- Supply air valves (opened too wide?)
- The entire duct system (blockage?)
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4
A0 / A10 / A11
Malfunction
Temperature sensor
Tghe / TCH / TAH
CAUTION!
Avoid contact with the
PCB and frost protection
element due to risk of
electrocution
Temp.
Resistance
[KΩ]
[°C]
(°C)
MIN.
19.570
15.485
13.502
12.906
12.339
11.801
11.291
MED.
19.904
15.712
13.681
13.071
12.491
11.941
11.420
MAX.
20.242
Check temperature sensor
resistance; see table
10
15
18
19
20
21
22
15.941
13.861
13.237
12.644
12.082
11.550
Resistance
OK?
Yes
No
Replace
temperature sensor
Replace PCB
Caution:
Reset unit!
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4.7.3 Malfunctions (or Problems) without Indications
This section gives an overview of the malfunctions (or problems) that are not displayed on the CC Ease display.
Problem/Malfunction Cause
All OFF Supply voltage
Check / measure
Check the fuse on the PCB panel.
• If the fuse is OK, the circuit board is defec-
tive.
No supply voltage
The mains power supply has failed.
High air delivery tem- Bypass remains closed
perature in summer
Lower
the comfort temperature.
Low air delivery tem- Bypass remains open
perature in winter
Increase
the comfort temperature.
No or insufficient air Filter clogged
supply, shower re-
Replace
the filters.
mains wet
Valves clogged
Clean
the valves.
Heat exchanger clogged by dirt.
Heat exchanger frozen
Fan dirty
Clean
the heat exchanger.
Thaw
the heat exchanger.
Clean
the fan.
Ventilation ducts clogged
MTD-ERV 350 in frost mode
Fan bearings defective
Clean
the ventilation ducts.
Too noisy
Replace
the fan bearings.
Fan settings
Change
the ventilation control settings.
Scraping noise
Install
• Siphon is empty
• Siphon does not seal
the siphon again.
Whistling noise
Seal
• An air leak somewhere in the system the air leak.
Air flow noises
Install
• Valves do not seal against duct.
• Valves not sufficiently open
the valves again.
Set
the valves again.
Leaking condensation Condensation drain clogged
Clean
the condensation drain.
Condensationfromexhaustductdoesnot Check whether
run into drain plate
the connections are correct.
Wired 3-position
switch does not func-
tion
Wiring is not OK
Switch is defective
Check the circuitry of the 3-position switch
using a voltmeter:
• Voltage only on N & L3:
[The fans run at position 1].
• Voltage only on N & L3 & L2:
[The fans run at position 2].
• VoltageonlyonN&L3&L1orN&L3&L2
& L1:
[The fans run at position 3].
Wireless 3-position
switch does not func-
tion
Battery is discharged
Check
the battery.
•
Replace the battery, if necessary.
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4.8 Spare Parts
3
4
6
2
11
9
10
9
5
8
7
1
12
The following table contains an overview of the spare parts available for the MTD-ERV 350.
Number
Part
1
Fans (left and right)
2
PCB panel in MTD-ERV 350.
3
4
5
6
7
8
PCB panel in top-mounted casing, Basic or Luxury version.
Temperature sensors T1 / T3 (in top of unit, on electronic carriage).
Temperature sensors T2 / T4 (in fan casing of both fans).
Servo motor & cable (for bypass and preheater)
Heat exchanger (or combined heat/enthalpy exchanger)
Filter clamp (2x)
9
Filter cloths (2x)
10
11
12
13
14
Filter set (with filter clamps, filter cloths and filter holders).
Preheater (also available as an optional kit for subsequent installation).
Mounting frame for installation on the floor (option).
Remote control transmitter (option)
Display (option).
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4.9 Wiring Diagram:
MTD-ERV 350 – LEFT-HAND Standard Version
Supply air
Blue
Blue
Brown
Brown
Blue
Brown
Bathroom switch
Exhaust air
Enthalpy
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4
4.10 Wiring Diagram:
MTD-ERV 350 – LEFT-HAND Luxury Version
Supply air
M
M
SA 1-3V
2
1
4
BYP/PIE T1/T3
T2/T4
VENT.
FIL
TRI
1
(N) Blue
(N) Blue
(L3) Brown
L2
(L3) Brown
(L2) Black
(L1) Grey
L1
BYP/PIE T1/T3
T2/T4
VENT.
BS
RJ11
RS232
1
2
3
4
+
-
LED
(N) Blue
(L3) Brown
L2
M
SAI 1-3V
Bathroom switch
L1
M
Exhaust air
Comm. Basis
RS232 - PC
RS232 - KFB
L2
L2
PE
PE
E/C
L
N
N
N
L1
PE
PE
PE
N
L
PE
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4.11 Wiring Diagram:
MTD-ERV 350 – RIGHT-HAND Standard Version
Exhaust air
Blue
Blue
Brown
Brown
Blue
Brown
Bathroom switch
Supply air
Enthalpy
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4
4.12 Wiring Diagram:
MTD-ERV 350 – RIGHT-HAND Luxury Version
Exhaust air
M
M
SA 1-3V
2
1
4
BYP/PIE T1/T3
T2/T4
VENT.
FIL
TRI
1
(N) Blue
(N) Blue
(L3) Brown
L2
(L3) Brown
(L2) Black
(L1) Grey
L1
BYP/PIE T1/T3
T2/T4
VENT.
BS
RJ11
RS232
1
2
3
4
+
-
LED
(N) Blue
(L3) Brown
L2
M
SAI 1-3V
Bathroom switch
L1
M
Supply air
Comm. Basis
RS232 - PC
RS232 - KFB
L2
L2
PE
PE
E/C
L
N
N
N
L1
PE
PE
PE
N
L
PE
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4.13 EC Declaration of Conformity
J.E. Stork Ventilatoren B.V. are the manufacturers of the MTD-ERV 350
8028 PM Zwolle-NL
Commercial Register Zwolle 22293
EC Declaration of Conformity
Designation of the appliance:
Conforms to the directives
: Heat Recovery Unit: MTD-ERV 350
: Machine Safety Directive (98/37/EC)
Low Voltage Directive
EMC Directive
(73/23/EEC) (98/37/EC)
(89/336/EEC, 92/31/EEC, 93/68/EEC)
Zwolle, 16 June 2007
J.E. Stork Ventilatoren B.V.
E v Heuveln,
General Managing Director
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