MTD ERV 350, ERV 365 User Manual

™

MTD-ERV 350 / 365

Installation &

Operating Manual

All rights reserved. This manual has been produced with the greatest care and attention. Nevertheless, the publisher accepts no liability for damage resulting from missing or incorrect information in this manual.

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 Deﬁ nition 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 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

2.3 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 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

2.5 Service by the User .......................................................................................................... 13

2.5.1 Cleaning or Replacing Filters ................................................................................. 14

2.5.2 Cleaning Valves (in the Home) ............................................................................... 15

2.6 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

3 FUNCTION OF THE SYSTEM ...................................................................................................... 17

3.1 Components of the Balanced Ventilation System ......................................................... 17

3.2 Controlled Ventilation System......................................................................................... 17

3.3 MTD-ERV 350 .................................................................................................................... 18

3.4 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 Technical Speciﬁ cations ................................................................................................. 23

3.6 Dimension Sketch ............................................................................................................ 25

4 INSTRUCTIONS FOR THE INSTALLER ...................................................................................... 26

4.1 Preconditions for Installation ......................................................................................... 26

4.2 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 Commissioning the MTD-ERV 350 ................................................................................. 28

4.5 Setting the Air Speciﬁ cations ......................................................................................... 34

4.6 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 Spare Parts ....................................................................................................................... 44

4.9 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

1 Introduction

This chapter contains general information on the MTD-ERV 350.

1.1 Foreword

Apart from this general chapter, this operating manual consists of:

• A section for the user,

• A section with technical speciﬁ cations, and …

• A section for the installer.

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, operation and maintenance of the MTD-ERV 350. In addition, 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.

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 notiﬁ cation.

1.2 CE Symbol

The unit is marketed under the name MTD-ERV 350. The MTD-ERV 350 is a balanced ventilation system with heat recovery for healthy, balanced and energy-saving ventilation of living premises. The year of construction of the MTD-ERV 350 is shown on the identiﬁ cation plate of the ComfoAir

350.

NOTE:

1.3 Warranty and Liability

1.3.1 General

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-

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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.

1.3.2 Warranty Terms

The manufacturer's warranty on the MTD-ERV 350 is for a period of 24 months after installation, but up to a maximum of 30 months after the date of manufacture of the MTD-ERV 350. Warranty claims can be made only for material ﬂ aws and/or design errors discovered during the warranty period. In the event of a warranty claim, the MTD-ERV 350 must not be dismantled without the prior written authorisation of the manufacturer. The manufacturer's warranty covers spare parts only if these have been installed by an installer approved by the manufacturer.

The warranty will be voided if:

• The warranty period has expired;

• The unit is operated without ﬁ lter;

• Parts not supplied by the manufacturer are installed;

• Unauthorised changes or modiﬁ cations are made to the unit.

1.3.3 Liability

The MTD-ERV 350 has been developed and manufactured for use in "balanced ventilation systems". Use in any other way does not constitute an 'intended use' and can result in damage to the MTD-ERV 350 or in personal injury for which the manufacturer accepts no liability. The manufacturer accepts no liability for damage or injury resulting from the following causes:

• Failure to observe the safety, operating and maintenance instructions contained in this operating 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

1.4 Safety

1.4.1 Safety Precautions

Observe the safety precautions given in this operating manual at all times. Failure to observe the safety precautions, warnings, comments and instructions can result in personal injury or damage to the MTDERV 350. Only an approved installer is authorised to install, connect, commission and service the MTD-ERV 350 in a way other than that described in this operating manual.

• The MTD-ERV 350 must be installed in accordance with the general local building, safety and installation regulations of the responsible public utility and other relevant safety authorities (such as the GIW - Dutch Institute for Certiﬁ ed Builders).

• Follow the safety precautions, warnings, comments 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 ﬁ lters and air inlet/outlet valves must be strictly observed

• The speciﬁ cations contained in this document must not be altered.

• All modiﬁ cations to the MTD-ERV 350 are strictly forbidden.

• The MTD-ERV 350 is not suitable for connection to an AC power supply.

• In order to ensure that the unit is inspected at regular intervals, we recommend that the user concludes a service contract. Your supplier can provide you with the addresses of authorised installers in your vicinity.

1.4.2 Safety Installations and Safety Measures

• The MTD-ERV 350 cannot be opened without the use of tools.

• It must not be possible to touch the fans with your hand. An air duct must therefore be connected to the MTD-ERV 350. The minimum duct length is 900 mm.

1.4.3 Symbols Used

The following symbols are used in this operating manual:

Caution!

Danger of:

- 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.

2 Introduction

2. Instructions for the User

This chapter describes how you should use the MTD-ERV 350.

Congratulations, you are now the owner of

the MTD-ERV 350,

the heat recovery unit from Zehnder Com-

fosystems. We wish you every comfort.

ing the summer months. Admitting the cool night air on warm days allows the room temperature in the home to be reduced. The bypass functions automatically. You simply have to set your comfort temperature. See section 2.3.2 for further information. The MTD-ERV 350 then maintains this temperature as closely as possible.

2.1 Deﬁ nition of Terms

The MTD-ERV 350 has the following functions:

• Balanced ventilation.

• Heat recovery.

• Bypass for free cooling.

• Frost protection.

• Chimney sweep control.

• Moisture recovery (option).

These terms/properties are described in more detail brieﬂ y in the following sections.

2.1.1 Balanced Ventilation

The MTD-ERV 350 is a balanced ventilation system. This is the most economical and balanced form of ventilation for homes. In a balanced ventilation system, polluted air from kitchen, bathroom, toilet and possibly even store room is drawn off and replaced by an equal volume of fresh air in the living room and bedroom. Air gaps under the doors ensure good air circulation in the home. This air circulation is literally balanced.

by, for example, rubber door seal strips or high-pile carpets. This would prevent the system from operating optimally.

Ensure that the comfort temperature

in winter is not set below the temperature you prefer.

below the preferred temperature, it is possible for the heating to be switched on with the bypass open. That is a waste of energy.

2.1.4 Frost Protection

The MTD-ERV 350 also has a frost protection system. This protects the heat exchanger (or the optional combined heat and moisture exchanger, see section 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 automatically activated frost protection system that

- when there is a risk of frost - temporarily reduces the supply of outside air so that condensation in the exchanger cannot freeze. A preheater can also be installed in the MTD-ERV 350 as an option. This has the advantage that the balanced ventilation then remains operational. The inlet of cold outside

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air then no longer needs to be reduced. In addition, this option offers greater comfort as the supply air is again preheated to more or less room temperature. If there is no preheater installed in your MTD-ERV 350, ask your installer about the possibilities.

si retniw ni erutarepmet trofmoc eht fI

2.1.2 Heat Recovery

Apart from ensuring the right balance between supply and exhaust air, the MTD-ERV 350 also offers the advantage that the heat from the exhaust air is given 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 recovered. The supply air can enter the rooms almost 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 MTDERV 350 also offers the possibility of discharging the warmer exhaust air directly into the atmosphere without passing through the heat exchanger. This is made possible by the integral bypass. The bypass is an additional circulating air duct that (temporarily) interrupts the heat transfer between the exhaust air and supply air. The cool outside air is then not preheated before it enters the dwelling. The bypass is used particularly on warm days dur-

2.1.5 Chimney Sweep Control

The MTD-ERV 350 also has a chimney sweep control system. This is a system that prevents the MTD-ERV 350 from creating an imbalance in the ventilation system, i.e. between the supply and exhaust air. The chimney sweep control system functions automatically. This system blocks or resets other ventilation control systems that could possibly create an imbalance in the ventilation system and that can be automatically switched on and off by the software. One example of this is that the supply and exhaust air fans cannot be switched off separately when the chimney sweep control system is active. The chimney sweep control system is employed in dwellings with open ﬁ re, 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 way that the MTD-ERV 350 cannot (or can no longer) cause an imbalance in the ventilation system.

Instructions for the User 3

2.1.6 Moisture Recovery (Option)

In addition to the heat transfer from the exhaust air to the fresh, generally cooler outside air, the MTDERV 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 moisture exchanger is supplied as a combined heat and moisture exchanger and is not installed as an additional exchanger alongside the heat exchanger of the MTD-ERV 350. This exchanger then has an additional function, i.e. recovering moisture in addition to the recovery of heat. In this way, up to 65% of the moisture is recovered from the exhaust air. The supply air can thus enter the rooms with an increased moisture content.

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:

• CC Ease operating unit of the MTD-ERV 350.

• Position switch (option) for setting the ventilation levels.

• Bathroom switch (option) for temporarily setting the highest ventilation level.

2.2.1 CC Ease Operating Unit

The MTD-ERV 350 is operated using the CC Ease operating unit.

The CC Ease (= Comfort Control Ease) operating unit is installed on the wall in the living room and communicates from there with the MTD-ERV 350.

sa deppiuqe si 053 MTD-ERV ehT

The next section describes brieﬂ y what information can be read off.

These operating aids are described in more detail brieﬂ y in the following sections.

4 Instructions for the User

Day and time

Automatic or

manual ventilation

Warning to replace internal (I)

or external (E) Filter

Air supply and/or air

exhaust OPEN or CLOSED

Geothermal heat recovery,

post-heater and/or

bypass on

Actual ventilation position

(with activated extractor

hood, if applicable)

Comfort temperature setting

(also indicates whether

system is heating or cooling)

The CC Ease operating unit has various keys for operating and setting the MTD-ERV 350. These keys are explained 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.

2.2.2 3-position Switch (Option)

Ventilation with the MTD-ERV 350 can also be operated by means of a 3-position switch.

Type 1 Type 2

Type 3

A 3-position switch can be used to set the ventilation levels of the MTD-ERV 350. One or more 3-position switches can be installed in a home (for example, in the kitchen). The exact version may differ slightly 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 ﬁ lter indication.

• Type 3  Wireless 3-position switch with:

-idni retl ﬁ dna noitcnuflam rof DEL cation. Auxiliary switch: position 3 is activated for a given time (2 possibilities for setting the time).

Instructions for the User 5

2.2.3 Bathroom Switch (Option)

Ventilation with the MTD-ERV 350 can also be operated 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 bathroom 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 example, that the MTD-ERV 350 switches to the highest 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. 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 returns to the normal (or originally set) ventilation level as soon as the bathroom light is switched off. Here again, an activation and deactivation delay can be set via the CCE Ease operating unit.

2.3 Use of the CC Ease Operating Unit

The following functions can be set using the CC Ease operating unit:

• Reading off and setting date and time.

• Reading off and setting the comfort temperature.

• Reading off and setting the ventilation levels.

• Switching the extractor hood on and off (option)*.

• Switching the supply and exhaust air fans on and off.

• Setting an individual ventilation programme.

• Setting additional ventilation control functions/options in the P menus.

These functions are described in more detail brieﬂ y in the following sections.

7. Press " " brieﬂ y again.

8. Wait until the minutes, e.g. "

9. Select with "

utes.

10 Press "

" or " " the correct min-

" brieﬂ y again to quit the menu.

", start to ﬂ ash.

2.3.2 ReadingandSettingComfort Temperature

Via the CC Ease operating unit it is possible: 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.

You can read off the comfort temperature, but also set the desired temperature. The MTD-ERV 350 will then automatically maintain this temperature 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).

2.3.1 Setting Date and Time

Via the CC Ease operating unit it is possible:

• To set the date and time.

Proceed as follows:

1. Press for two seconds on "

2. Wait until the day, e.g. "Sa", starts to ﬂ ash.

3. Select with "

4. Press " " brieﬂ y.

5. Wait until the hours, e.g. "

6. Select with "

6 Instructions for the User

" or " " the correct day.

" or " " the correct hour.

", start to ﬂ ash.

Reading off the comfort temperature

Proceed as follows:

1. Press "

2. Wait until the comfort temperature is displayed.

3. Press "

Without pressing the key, the menu is quit automatically after 30 seconds.

" brieﬂ y now to quit the menu.

Setting the comfort temperature

Proceed as follows:

1. Press for two seconds on " ".

2. Wait until the comfort temperature, e.g. " 20.0 ",

starts to ﬂ ash.

3. Select the desired comfort temperature with "

" or " ".

4 Press "

" brieﬂ y now to quit the menu.

2.3.3 Reading and Setting Ventilation Level

Via the CC Ease operating unit it is possible:

• To read off and set the ventilation level.

Position 1 ! Low.

- Use for a low ventilation require ment.

Position 2 ! Normal.

- Use for a normal ventilation requirement.

Position 3 ! High.

- Use this level during cooking, showering and when additional ventilation is desired..

,denrecnoc si noitalitnev eht sa raf sA the MTD-ERV 350 adjusts to the highest ventilation level set in the dwelling, unless otherwise set in the automatic software control.

The ventilation level can be set as follows:

1. Press "

2. Press "

" to increase the ventilation level.

" to decrease the ventilation level.

Reading off the ventilation level

The currently set ventilation level, e.g. “2”, is shown 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.

Setting the ventilation level

You can also set the ventilation level by hand and thus increase or decrease the level. You have a choice 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.

During ventilation set by hand, the indication "MANUAL" appears on the CC Ease display.

3. Press "

" to quit the menu.

If level A is set on the CC Ease operating unit, the 3-position switches cannot be used.

Instructions for the User 7

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.

Proceed as follows:

4. Press for two seconds on "

5. Wait until the symbol for the extractor hood ap-

pears.

6. Select with "

level, e.g. “ 3”.

7. Press " " brieﬂ y to switch off the extrac-

tor hood.

" or " " the ventilation

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. Press "

switch off the exhaust air fan (and at the

same time switch on the supply air fan

again).

3. Press " " three times to

switch on the supply and exhaust air fans again.

" twice to

After switching off the extractor hood, the symbol for the extractor hood disappears again from the CC Ease display.

2.3.5 Switching Supply and Exhaust Air Fans On 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 "

to switch off the supply air fan.

" once to

Note that by switching off the supply or exhaust air fan, you temporarily have no balanced ventilation with heat and (if installed) moisture recovery in your home.

Never leave the fans switched off for longer than 12 hours.

8 Instructions for the User

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

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".

2. Wait until the day appears.

3. Program the desired days or a sequence of

days.

– Select the desired day/days with "

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”.

" or "

Weekend fan position

The number of the switching moment ﬂ ashes in the bottom right-hand corner.

– Select the switching moment by pressing "

" or " ".

– Press "

ment.

4. Program the starting time for the desired

ventilation level.

– Press "

– Select with "

time in hours.

" to conﬁ rm the switching mo-

" or " " the desired

Instructions for the User 9

– Press " " again. – Wait until the minutes, e.g. " ﬂ ash. – Select with "

time in minutes.

– Press " " again. – Wait until the ventilation symbol starts to ﬂ ash. – Select the desired ventilation level with "

– Press " " to store the switching moment.

5. Program the next ventilation programme, if required. – Then perform steps 1 to 5 for the next venti

lation programme.

" or " ".

" or " " the desired

" start to

2. Wait until "P menu" appears on the display.

3. Select the desired P menu with "

", e.g. " 2 ".

4. Press " " to conﬁ rm the P menu.

5. Select the desired P sub-menu with "

or "

6. Press "

", e.g. " 23 ".

" to conﬁ rm the P sub-menu.

" or "

Making settings in the P menus

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 "

9. Repeat steps 5 to 8 to set several P sub-menus in turn in the same

P menu.

Return to the P menu; press once on

" to save the value.

" 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.

In the P menus the user may:

- only set the additional functions P1, P2 and P9. The remaining P menus P3 to P8 are reserved for the installer.

Access to the P menus

Proceed as follows:

1. Press "

10 Instructions for the User

" and " " simultaneously.

Return to the main window

Press " " twice.

Menu P1 ! Status of the functions

Ventilation functions

Sub-menu Description Activated / not activated

P10 Menu 20 currently active? Yes (1) / No (0) P11 Menu 21 currently active? Yes (1) / No (0) P12 Menu 22 currently active? Yes (1) / No (0) P13 Menu 23 currently active? Yes (1) / No (0) P14 [Not available] [Not available] P15 Menu 25 currently active? Yes (1) / No (0) P16 Menu 26 currently active? Yes (1) / No (0) P17 Menu 27 currently active? Yes (1) / No (0) P18 Menu 28 currently active? Yes (1) / No (0) P19 Menu 29 currently active? Yes (1) / No (0)

Menu P2 ! Set time delays

Time delay values

muminiMnoitpircseDunem-buS Maximum Default

setting

P20

(Option)*

P21

(Option)*

Note:

Only for systems with wired switch and only if your system is equipped with a second position switch in the bathroom.

P22

(Option)*

Note:

Only for systems with wired switch and only if your system is equipped with a second position switch in the bathroom.

P23

Note:

Only for systems with a wired position switch.

Deactivation delay for extractor hood function.

• 'x' minutes after pressing the extractor hood switch, the MTD-ERV 350 returns to the previously set level.

Activation delay for the bathroom switch (to switch to the HIGHEST LEVEL).

• 'x' minutes after turning on the bathroom switch, the MTD-ERV 350 switches to the HIGHEST LEVEL.

Deactivation delay for the bathroom switch (to switch to the NORMAL LEVEL).

• 'x' minutes after turning on the bathroom switch, the MTD-ERV 350 returns to the NORMAL LEVEL.

Deactivation delay for ventilation position 3.

• When position 3 (HIGHEST LEVEL) is switched on brieﬂ y (< 3 seconds), the MTD-ERV 350 remains at this position for the time set in this menu.

0 Min. 180 Min. 30 Min.

0 Min. 15 Min. 0 Min.

0 Min. 120 Min. 30 Min.

If, within the run-down time, the position switch or the radio remote control is activated, the MTD-ERV 350 switches immediately to the set ventilation level.

P24 Filter warning

• Here the user can select when "FILTER DIRTY" is to appear on the CC Ease display.

1 week 26 weeks 16 weeks

Instructions for the User 11

P25

Note:

Only for systems with a remote control switch.

Sub-menu Description

P26

Note:

Only for systems with a remote control switch.

P29

(Option)*

Deactivation delay for ventilation position 3 (with " When

" is held depressed (> 2 sec.), 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 120 minutes.

Setting the Levels for the Extractor Hood.

When the extractor hood is switched on, the ventilation levels for the extractor hood can be set a few percent higher than the corresponding 'normal' ventilation levels.

Deactivation delay for ventilation position 3 (with "

• When "

" is pressed BRIEFLY (< 2 sec.), 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.

").

1 Min. 20 Min. 10 Min.

Time delay values

Minimum Maximum Default

setting

1 Min. 120 Min. 30 Min.

1% 99% 10%

Menu P9 ! Status of the functions (from menu P5)

Ventilation functions

Sub-menu Description Activated / not activated

P90 Chimney

sweep control active?

P91 Bypass open (=yes)

/ closed (=no)?

P92

(Option)*

P93

(Option)*

P94

(Option)*

P95 Frost protection

P96

(Option)*

P97 Moisture control active? Yes (1) / No (0)

Valve of the geothermal heat exchanger open (=yes) / closed (=no)?

Post-heater active? Yes (1) / No (0)

0 – 10 V control active? Yes (1) / No (0)

(standard or preheater) active? Extractor

hood control active?

Yes (1) / No (0)

12 Instructions for the User

2.4 Use of the Switch(es) (Option)

showering to remove excess moisture and odours as quickly as possible.

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 required.

dna gnikooc retfa emit emos rof noitisop tsehgih eht ta 053 MTD-ERV eht evaeL

stsujda 053 MTD-ERV eht ,tnemtrapa eht ni dellatsni era sehctiws noitisop lareves fI

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.

2.5 Service by the User

As user you have to service the MTD-ERV 350 as follows:

• Clean or replace the ﬁ lters.

• Clean the valves (in the home).

eb ot ,level ecnesba eht ,level noitalitnev lanoitidda na swolla tinu gnitarepo esaE CC ehT

.hctiws thgil moorhtab eht otni detargetni eb osla nac lortnoc noitalitnev moorhtab ehT

These measures are described in more detail brieﬂ y in the following sections.

If these measures are not performed (regularly), there is a danger that the ComfoAir 350 will cease to function correctly.

Instructions for the User 13

2.5.1 Cleaning or Replacing Filters

As soon as the corresponding warning appears on the display of the CC Ease operating unit, the ﬁ lters have to be cleaned or replaced.

ILTER I ” ! The internal ﬁ lters must be

• “ F cleaned or replaced.

• “ F

ILTER E ” ! The external ﬁ lters* must be

cleaned or replaced.

One of the ﬁ lter indications shown above then appears on the CC Ease display.

ﬁ lanretni ehT lters are supplied as standard with the MTD-ERV 350. The external ﬁ lters* form part of the duct system of the ventilation system and do not belong to the MTD-ERV 350.

The MTD-ERV 350 is equipped as standard with two internal ﬁ lters. The external ﬁ lters* 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 ﬁ lters, the monitoring of these ﬁ lters must be connected to the PCB panel (extended version) of the MTD-ERV 350.

ﬁ lanretxe eht fo gnirotinoM lters* must be connected to the PCB panel (extended version) of the MTD-ERV 350 by the installer.

• Push the ﬁ lters (A) back into

the MTD-ERV 350.

• Insert the plug of the MTD-ERV 350 into the

plug socket again.

• Press "

" to cancel the ﬁ lter indication.

For replacement ...

As soon as the ﬁ lters have to be replaced, proceed as follows:

• Remove the mains plug from the plug socket.

• Pull the ﬁ lters (A) out of the MTD-ERV 350.

• Remove the clamps (C) holding the two ﬁ lter

cloths to the ﬁ lter brackets.

• Push the ﬁ lter cloths (D) off the ﬁ lter brackets

(F).

For cleaning ...

You can clean the ﬁ lters when necessary:

• Remove the mains plug from the plug socket.

• Pull the ﬁ lters (A) out of the MTD-ERV 350.

• Clean the ﬁ lters (B) using a vacuum cleaner.

14 Instructions for the User

Ensure that the cloth is not damaged by the corners of the ﬁ lter bracket.

-po otni 053 MTD-ERV eht gnittup erofeB eration the ﬁ rst time, you should clean the ﬁ lters (and the valves) because the ventilation system may have been soiled with building dust during the building phase.

• Push the new ﬁ lter cloths (E) over the ﬁ lter

brackets (F).

• Fasten the clamps (C) again.

• Push the ﬁ lters (A) back into the ComfoAir 350.

• Insert the plug of the MTD-ERV 350 into the

plug socket again.

• Press "

" to cancel the ﬁ lter indication.

Replace all ﬁ lters (at least) once a year.

2.5.2 Cleaning Valves (in the Home)

The ventilation system is equipped with the following valves:

eht lla llatsni SYAWLA uoy taht erusnE valves in exactly the same position (and in the same ventilation slot in the wall or ceiling) after cleaning, otherwise optimum operation of the ventilation system cannot be assured.

The ventilation air is admitted and discharged via valves. Gaps under the doors in the dwelling ensure 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:

• Do not seal the gaps.

• Do not change the setting of the valves.

• Do not interchange the valves.

2.6 Malfunctions

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.

Exhaust air valve (STB) Exhaust air valve (STC)

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.

• Install the valve again EXACTLY IN THE SAME

POSITION (and IN THE SAME HOLE).

• Repeat this procedure for the other valves.

On the position of the valves ...

The installer has set all the valves so that the ventilation system operates optimally with respect to the volumetric air ﬂ ows. Do not therefore change the setting of the valves.

These measures are described in more detail in the following sections.

2.6.1 Malfunction indication on the CC Ease Display

In the event of a malfunction, a malfunction code appears on the CC Ease display. The display then always shows an 'A' or 'E' code with the corresponding numbers. By referring to the overview of malfunctions in section 4.7.1, you can ﬁ nd out what the particular malfunction indication means.

2.6.2 3-position Switch with Malfunction LED

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. " ! The LED lights up in the event of a mal-

function (and in the event of a ﬁ lter 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 malfunction or a 'Filter dirty' warning, both LEDs light up red three times. Finally both LEDs light

Instructions for the User 15

up green again.

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 installer.Note the malfunction code that appears on the displayofthe CC Ease operating unit.Also note yourMTD-ERV 350type.It can be foundonthe identiﬁcation 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 cleaning orreplacementorfor someotherurgentreason. If the plug were to be removedfromtheplugsocket, thedwellingwouldno longer bemechanicallyventilatedandmoistureaswellasfungusproblemscould occur in the longer term. Avoid at all costs leaving the MTD-ERV 350 switched off for prolonged periods.

noitisop-3ehtnoDELnoitcnuflamehT

2.7 End of Service Life

Discuss with your supplierwhat you should do with yourMTD-ERV 350at theendofitsservicelife.Ifyou cannot return the MTD-ERV 350 to your supplier, do not simply throw it away;contact your local authorities to ﬁnd out about possibilities of re-using componentsorthe environmentally saferecycling of the materials.

• Do not throw the batteries of the wireless

switches into the domestic refuse; dispose of them at the ofﬁcial waste collection point.

16 Instructions for the User

3 Function of the System

This chapter describes the design of the balanced ventilation system and its function in conjunction with the MTDERV 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 ﬁ lter display or 3-position switch with malfunction and ﬁ lter display.

- Wireless 3-position switch(es).

- Bathroom switch.

- Sensors with 0 – 10 V control (2x).

· 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).

· 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).

- ComfoControl Avignon (touch screen remote control with additional operating options compared with the CC Ease operating unit).

Instructions for the User 17

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 ﬁ lters (D) for air ﬁ ltration.

· 2 energy-saving DC motors (E) with high-speed impeller.

· (High-efﬁ ciency) heat exchanger (with optional moisture exchanger) (F) with a thermal efﬁ ciency exceeding 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 sensors with 0 - 10 V controller (2x).

· PCB panel (H1) with connections for the fans, bypass, preheater, temperature sensors (T1 to T4), 3-position switch with or without malfunction and ﬁ lter display (option) and the bathroom switch (option).

· Identiﬁ cation 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).

18 Function of the System

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 ﬂ ows that hygienically exchange their energy.

Filter

· 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 supply 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 recovery 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 MTDERV 350.

Please refer to the identiﬁ cation 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 identiﬁ cation 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 installed 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 severe frost. In this way the heat exchanger is protected 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-

19Function of the System

side air no longer has to be temporarily reduced (or even interrupted for a short time) in order to prevent 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. The preheater is switched on and off automatically. As soon as the temperature of the outside air is below 0 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 supply air duct of the MTD-ERV 350 measures the temperature. This preheating control ensures balanced ventilation up to a maximum of 150 m³/h at

-15oC. The user cannot inﬂ uence the automatic preheater control. The installer has to modify the preheating control, for example during installation of the MTD-ERV 350, in menu P52 via the CC Ease operating unit (for further information, see section 4.4).

C for a certain period, the air duct

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 retroﬁ tting, installation instructions are supplied with the installation kit.

3.4.2. Ventilation via Extractor Hood*

An extractor hood can be connected to the MTDERV 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.

Switching the extractor hood on and off, see section 2.3.4.

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.

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 installed in the duct system of the ventilation system, in other words downstream of the MTD-ERV

Menu P29:

Setting the rate of increase

v Rate of increase

post-heater is that the supply air can be directly admitted to the living rooms at the comfort temperature set for the dwelling. That means additional comfort.

The post-heater is not supplied as standard 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. The post-heater is switched on and off automatically. 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

Minimum 1%

Standard 10%

Maximum 99%

350. The post-heater ensures that after the outside air has ﬁ rst been heated in the heat/moisture exchanger of the MTDERV 350, the supply air is additionally

heated before it enters the living rooms. The advantage of the

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. Ventilation positions 1, 2 or 3 can be set. These ventilation 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:

20 Function of the System

in the duct system measures the temperature of the supply air immediately behind the post-heater. The user cannot inﬂ uence the automatic postheater control system. The post-heater reacts to

the set comfort temperature. This temperature can, however, be altered by the user (for further information, see section 2.3.2). The installer simply 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 during installation of the MTD-ERV 350 (for further information, see section 4.4).

temperature sensor must be connected to the PCB panel (extended version) of the MTD-ERV 350 by the installer.

3.4.4 CO2 Sensor* in the Home

A CO2 sensor can be connected to the MTD-ERV

350. 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.

air fan, and (b) the old air is drawn off faster by the exhaust air fan. As soon as the CO2 concentration in the house has reached acceptable values again, the settings of the two fans are gradually reduced again.

the PCB panel in the electronics casing on the top of the MTD-ERV 350 by the

gnidnopserroc eht dna retaeh-tsop ehT

installer.

3.4.5. RH Sensor* in the Home

A RH sensor can be connected to the MTD-ERV

350. This RH sensor allows the MTD-ERV 350 to regu-

Living space

ot detcennoc eb tsum rosnes 2OC ehT

Living space

If the CO2 concentration is too high compared with the set (and hence highest admissible) CO2 concentration, the settings of the supply and exhaust air fans will be gradually increased to reduce the CO2 concentration. In this way the air in rooms with a high carbon dioxide concentration that can occur, for example, during a party with a large number of people, can be quickly 'exchanged' 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 P27: Setting CO2 concentration

v CO2 concentration

concentration

v CO

concentration

Minimum ppm to be decided

Standard ppm to be decided

Maximum ppm to be decided

The starting point for this CO2 control is the assumption that the outside air is generally the fresh(er) air. The CO2 concentration can be reduced by this system in

that (a) fresh air is drawn in faster with the supply

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. If the humidity is too high compared with the set (and hence highest admissible) humidity, the settings 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. Problems due to high humidity can thus be avoided in this way. The user can set the maximum admissible 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:

Menu P28: Setting the humidity level

v Humidity level

Minimum 0%

Standard 60%

Maximum 100%

The starting point for this humidity control is the assumption that the outside air is generally the dry (drier) air. The humidity can be reduced by this system in

that (a) dry air is 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.

21Function of the System

the PCB panel in the electronics casing on the top 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.

The geothermal heat exchanger is an additional 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 geothermal 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 ﬂ ows through the geothermal heat exchanger. The geothermal heat exchanger is thus an outstanding 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 underground geothermal heat exchanger before it enters the house via the MTD-ERV 350. The geothermal heat exchanger functions automatically. A temperature sensor installed anywhere on the outside of the house measures the temperature of the outside air. As soon as

ot detcennoc eb tsum rosnes HR ehT

can modify the automatic control of the geothermal heat exchanger to a slight extent in menu P61 at the CC Ease operating unit, if necessary.

ehtdnaregnahcxetaehlamrehtoegehT corresponding temperature sensor must be connected to the PCB panel (extended version) of the MTD-ERV 350 by the installer.

3.4.7 Chimney Sweep Control

Apart from the chimney sweep control set as standard in the software, an additional unit can be connected to the PCB panel (extended version) of the MTD-ERV 350 as an option that can switch off the fans of the MTD-ERV 350 via a floating contact. By means of a pressure sensor installed in the room in which the hearth to be monitored is installed, 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.

-dnopserroc eht dna tinu lanoitidda ehT ing pressure sensor do not belong to the standard scope of supply of the MTDERV 350.

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 ﬂ ow through the heat exchanger. The user cannot inﬂ uence the automatic geothermal heat exchanger control system. The installer simply has to indicate whether or not a geothermal heat exchanger 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

-dnopserroc eht dna tinu lanoitidda ehT ing pressure sensor must be connected to the PCB panel (extended version) of the MTD-ERV 350 by the installer.

The installer cannot inﬂ uence the automatic chimney 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 information, see section 4.4).

22 Function of the System

3.5. Technical Speciﬁ cations

Absent

High

Maximum

Supply voltage

Power factor (cos phi)

Position Ventilation rate Value

Absent

Low at

Medium at

High

Maximum

MTD-ERV 350 nL (normal Air Volume)

eulaVetar noitalitneVnoitisoP

tawoL

tamuideM

Power supply

Noise output supply air fan

Noise output exhaust air fan

Position Ventilation rate Value

Absent

Low at

Medium at

High

Maximum

23Function of the System

MTD-ERV 350 nL (normal Air Volume)

Absent

Low

Medium

High

Maximum

Supply voltage

Power factor (cos phi)

Absent

Low

etar noitalitneVnoitisoP

Power supply

Noise output supply air fan

Value

eulaVetar noitalitneVnoitisoP

Medium

High

Maximum

Absent

Low

Medium

High

Maximum

HE exchanger material

Inner lining material

Noise output exhaust air fan

eulaVetar noitalitneVnoitisoP

General specifications of the MTD-ERV 350

Polystyrene

24 Function of the System

Heating capacity

Weight

3.6 Dimension Sketch

25Function of the System

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 350 can be installed in a particular room, please pay attention to the following points:

• The MTD-ERV 350 must be installed in accordance with the local safety regulations and installation instructions of i.a. the public utilities, and in accordance with the instructions in this manual.

• The installation location must be selected such that there is sufﬁ cient space around the MTDERV 350 for air connections and for carrying out maintenance work.

• The following installations must be present in the room:

- Air duct connections.

- 230 V power supply with fused wall plug

socket.

- Installations for condensation drainage.

• 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 exhaust air duct must have a doublewalled or insulated roof opening. This prevents 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 frostfree room. The condensation must be discharged frost-free, with a downward gradient and using a siphon. The MTD-ERV 350 must be ﬁ rmly 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.

• 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.

4.2 Installation of the MTD-ERV 350

4.2.1 Transport and Unpacking

• Work carefully when transporting and unpacking the MTD-ERV 350.

Ensure that the packaging materials are disposed of in an environmentally favourable manner.

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:

• MTD-ERV 350.

• Check the identiﬁ cation plate to see whether it is the correct type.

• 4 x 45° connection elbows.

• Mounting brackets.

• Operating Manual.

The MTD-ERV 350 is available in the following types:

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

In order to ensure a good and draught-free ventilation of the dwelling, gaps were deliberately left under the inside doors. If these gaps are sealed, for example with door seals or highpile carpets, the ventilation in the apartment will stagnate. This would prevent the system from operating optimally.

26 Function of the System

Meaning of the sufﬁ xes:

• L = Left.

• R = Right.

• VV = Preheater.

• Luxe = Refers to the extended version of

the PCB panel.

• CC = ComfoControl Avignon. This is the

touch screen remote control with additional operating options compared with the CC Ease operating unit.

MTD-ERV 350

Exhaust air

ComfoAir 350 – LEFT

Stale air

Outside airSupply air

No space is required to the sides of the MTD-ERV 350 for its proper operation.

Do not install the MTD-ERV 350 with a side against a wall to avoid possible contact noise.

4.3.1 Connection of the Air Ducts

Outside air

ComfoAir 350 – RIGHT

4.3 Wall Mounting

Intake air

Exhaust airStale air

Install a suitable silencer directly at the air intake and air discharge connections. Information on silencers is available from your supplier. The air ducts to be connected, minimum diameter 150 mm, must be installed with as little air resistance as possible and air tight.

• 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.

• Install the exhaust air duct with a gradient towards the MTD-ERV 350.

4.3.2 Connection of the Condensation Drain

Install the MTD-ERV 350 on a wall with a load-bearing capacity of at least 200 kg/m². For other walls we recommend the use of a base for installation on the ﬂ oor (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.

• Connect the condensation drain (not supplied) to the underside of the MTD-ERV 350. The value shown of 235 mm is only an indicative value. The actual value depends on the type of condensation drain selected, see also section 4.3.2 for the connection of the condensation drain.

• Ensure that at least 1 metre of space is left in front of the MTD-ERV 350 for later maintenance work.

Connectio

LEFT

27Instructions for the Installer

MTD-ERV 350

Connection

RIGHT

The warm exhaust air is cooled by the outside air in the heat exchanger. As a result, the moisture contained in the room air condenses in the heat exchanger. The condensation forming in the heat exchanger is discharged via the condensation tray into the condensation drain.

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.

• Ensure that the end of the pipe or hose ends

under the water level.

Ensure that the water lock of the connection to the house sewage system is always ﬁ lled with water.

ta setanimret dne esoh eht taht erusnE least 60 mm below the water level. This will prevent the MTD-ERV 350 from drawing in air.

Commissioning can be carried out with the P menus via the CC Ease operating unit. These P menus allow various settings (in particular for ventilation control) to be selected for the MTD-ERV 350. An overview of the available P menus is given below:

Menu Possibilities

P1 Read off the status (from menu P2) P2 Set time delays (and indication “F

DIRTY” and setting values for extractor

hood and sensors) P3 Setting the ventilation levels P4 Read off the temperature, relative hu-

midity and CO2 concentration. P5 Setting additional control functions P6 Setting additional control functions P7 Read off and reset malfunctions (and

system information) P8 Setting 0-10 V connections P9 Read off the status (from menu P5)

The P menus P1, P2 and P9 are accessible for the user and serve mainly for reading off statuses and for setting time delays. For further information, see section

2.3.7. The remaining P menus P3 to P7 are reserved exclusively for the installer.

ILTER

In the P menus the user may:

- only set the additional functions P1, P2 and P9. The remaining P menus P3 to P7 are reserved for the installer.

28 Instructions for the Installer

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 Press simultaneously on " " and

2 Wait until the "P menu" appears on the display.

The P menus P1, P2 and P9 are now

accessible.

3 Press

" and " " simultaneously for 2 seconds.

4 Wait until the "P menu" P3 appears on the dis-

play.

The P menus P3 to P8 are now acces-

sible.

10 Press "

11 Repeat steps 7 to 10

to set several parameters in turn in

the same P menu.

Return to the P menu: Press "

" to conﬁ rm the value.

Return to the main window

1 Press " " twice.

" once.

5 Select with " " or " " the desired P

menu, e.g. "

6 Press "

7 Select with " " or " " the desired P sub-

menu, e.g. " 51 ".

8 Press "

" to conﬁ rm the P menu.

" to conﬁ rm 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

29Instructions for the Installer

Menu P3 ! Set ventilation controls

Values for ventilation controls

Sub-menu Description Minimum Maximum Standard

P30 Setting the power (in %) of the exhaust air

fan in position "Absent".

P31 Setting the power (in %) of the exhaust air

fan in position "Low".

P32 Setting the power (in %) of the exhaust air

fan in position "Medium".

P33 Setting the power (in %) of the exhaust air

fan in position "High".

P34 Setting the power (in %) of the supply air

fan in position "Absent".

P35 Setting the power (in %) of the supply air

fan in position "Low".

P36 Setting the power (in %) of the supply air

fan in position "Medium".

P37 Setting the power (in %) of the supply air

fan in position "High".

P38 Current power (in %) of the exhaust air

fan.

P39 Current power (in %)

of the supply air fan.

0% 97% Normal / High

16% 98% Normal / High

17% 99% Normal / High

18% 100% Normal / High

0% 97% Normal / High

16% 98% Normal / High

17% 99% Normal / High

18% 100% Normal / High

- - Current %

15% / 15%

35% / 40%

50% / 70%

70% / 90%

15% / 15%

35% / 40%

50% / 70%

70% / 90%

Menu P4 ! Read off the temperatures (% and ppm)

Read off the temperatures (% and ppm)

Sub-menu Description Minimum Maximum Standard

P40 Current value of T P41 Comfort temperature 12 P42 Current value CO P43 Current value relative humidity. - - Current % P44 Current value of T P45 Current value of T1

(= temperature of the outside air)

P46 Current value of T2

(= temperature of the supply air)

P47 Current value of T3

(= temperature of the exhaust air)

P48 Current value of T4

(= temperature of the stale air)

P49 Current value of T

(= temperature of the outside air for geothermal heat exchanger)

POST-HEATER - - Current

EXTRACTOR HOOD - - Current

C 28 oC 20 oC

- - Current ppm

- - Current

Current oC

Current

GHE

Current

30 Instructions for the Installer

Menu P5 ! Setting additional control functions

Values for additional control functions

P50 Activation of

the chimney sweep control system.

P51 Indicate whether

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

preheater control. v Level 0

Particularly safe setting.

v Level 1

Safe setting.

v Level 2

Nominal setting.

v Level 3

Economy setting.

Note:

ThePREHEATER ISSWITCHED ONEARLIEST WITHTHE particularlysafesetting.Thislevelthus offersthe greatest safety for maintaining balanced ventilation. On the other hand, the preheater is switchedon thelatest intheECONOMY SETTING.Thislevelthus offersthe leastsafetyformaintaining balanced ventilation. During commissioning of the MTD-ERV 350 the preheater control can generally be left on Level 2:NOMINAL SETTING (=workssetting).Only in areas withcoldwinters(withdaytimetemperaturesregularlyapprox.-10°Corbelow)shouldLevel1:SAFESETTINGorevenLevel0:PARTICU-

LARLY SAFE SETTINGS be selected.

0 (= No) 1 (= Yes) 0

0 3 2

dradnatSmumixaMmuminiMnoitpircseDunem-buS

Values for additional control functions

P53 Indicate presence of an extractor hood.

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.

Note:

The MTD-ERV 350 is equipped with a bypass as standard. The value can therefore

be left at '1'. P55 Indicate presence of a post-heater. 0 (= No) 1 (= Yes) 0 P56 Setting the necessary air volume for the

dwelling.

• nL: "Normal air volume".

• HL: "High air volume".

Note:

Setting the air volume in P56 (to "nL" or "HL") forms the basis for setting the air speciﬁ cations

and hence for setting the fans. For further information, see section 4.5 and P30 to P37.

0 (= No) 1 (= Yes) 0

0 (= No) 1 (= Yes) 1

nL HL nL

dradnatSmumixaMmuminiMnoitpircseDunem-buS

31Instructions for the Installer

Values for additional control functions

P57 Setting the MTD-ERV 350 Type.

• Li = Left-hand version.

• Re = Right-hand version.

Note:

The MTD-ERV 350 is set correctly at the factory.

• Refer also to the identiﬁ cation plate for these data.

P58 (Not yet available)

P59 Enthalpy exchanger installed 0 (= No) 1 (= Yes) with

Setting the fan type.

• 0 = Standard.

• 1 = Constant volume.

• 2 = Constant pressure.

Note:

The MTD-ERV 350 is set correctly at the factory.

• Constant volume or constant pressure

fans cannot be installed subsequently.

Li Re Li

0 2 0

moisture sensor

dradnatSmumixaMmuminiMnoitpircseDunem-buS

2 (= Yes) without moisture sensor

Menu P6  Setting additional control functions

Values for additional control functions

Sub-menu Description Minimum Maximum Standard

P60 Indicate presence of a

0 (= No) 1 (= Yes) 0

geothermal heat exchanger (GHE).

P61 Setting the percentage that the sup-

0% 99% 0% ply air fan must run higher when the valve of the geothermal heat exchanger (EWT) is open.

P62 Tghe, low 0% 15% 7% P63 Tghe, high 10% 25% 23% P64 Tnaheater, desired 5% 40% 18%

Menu P7 ! Read off malfunctions (and system information)

Values (malfunction) information

P70 Current software version. Software version number

display (see section 4.7)

P72 Last malfunction but one Code corresponding to alarm and malfunction

display (see section 4.7)

P73 Last malfunction but two Code corresponding to alarm and malfunction

display (see section 4.7)

P74 Reset a malfunction on the

MTD-ERV 350.

0 1 0

dradnatSmumixaMmuminiMnoitpircseDunem-buS

noitcnuflam dna mrala ot gnidnopserroc edoC.noitcnuflam tsaL17P

32 Instructions for the Installer

Values (malfunction) information

After a complete reset, the MTD-ERV 350 prompts you to enter “nL / HL” (see P56) and “Li / Re” (see P57) again.

Sub-menu Description Minimum Maximum Standard

P75

P76 Self-test of the MTD-ERV 350. 0

Complete reset.

• 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, all settings in menus P2 and P3 and the existing controls P5 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.

Explanation

The MTD-ERV 350 switchestothehighestlevel immediately after activation of the self-test.Inaddition,thebypass valveopens and closesimmediatelyafteractivation oftheself-test.Ifthis self-test is completed without malfunctions, the valve of the preheater (if installed) then opens and closes.

0 0 0

1 0

Menu P8  Open-loop and closed-loop control

Selection between open-loop and closed-loop control

Sub-menu Description

P80 0= Open-loop control 1 = Closed-loop control (by analogy with input 1)

P81 0= Open-loop control 1 = Closed-loop control (by analogy with input 2)

P82

P83

P84

P85

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

33Instructions for the Installer

4.5 Setting the Air Speciﬁ cations

The MTD-ERV 350 must be set after installation.

This can be performed using the air speciﬁ cations of the MTD-ERV 350 shown above. v Setting the normal air volume ‘nL’ corre-

sponds to the presetting of the G 90.

v Setting the normal air volume ‘nL’ corre-

sponds to the presetting of the G 91.

The standard settings of the MTD-ERV 350, nL, are as follows:

Position ABSENT 15% Position LOW 35% Position MEDIUM 50% Position HIGH 70%

The standard settings of the ComfoAir 350, HL, are as follows:

Position ABSENT 15% Position LOW 40% Position MEDIUM 70% Position HIGH 90%

To set the MTD-ERV 350 (after installation), proceed as follows:

• Switch the MTD-ERV 350 to the setting mode.

– Press simultaneously for two seconds on

" and " ".

– Wait until "InR" appears on the CC Ease

display.

are always deactivated. The MTD-ERV 350 switches the setting mode off again automatically after 30 minutes.

• Close all windows and outside doors.

• Close all inside doors.

• Check the presence of air circulation systems in the building (at least 12 cm2 per l/s).

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 all the valves and set them according to the instructions or as in the reference dwelling.

If no data are known: – Install the valves and open them as far

as possible.

– Measure the air volumes, ﬁ rst the supply air

and then the exhaust air.

– differ by more than approx. 10% from the

nominal air volumes and the majority of the deviations are in the plus range, adjust the fan so that all the deviations are in the plus range. If the majority of the deviations are in the minus range, adapt all the devia-

tions so that they are all in the minus range. Ensure also that a supply and an exhaust valve remain fully open.

• Change the fan settings in the P menus P30 to P37 via the CC Ease operating unit.

– Select the lowest possible setting in or-

der to minimise energy consumption.

– Ensure that the ratio of the air volumes be-

tween high, medium and low remains the same.

diagram for setting the fans.

• If the previously set air volumes still differ too much:

– Adjust the valves further.

• Check the whole system again after adjustment of all the valve stages.

• Switch the MTD-ERV 350 (back) to ventilation position 2.

4.6 Maintenance by the Installer

As installer you have to service the MTD-ERV 350 as follows:

• Inspect the heat exchangers and fans

• Clean the ﬁ lter if a preheater is installed.

These measures are described in more detail brieﬂ y in the following sections.

(regularly), there is a danger that the MTD-ERV 350 will cease to function cor-

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4.6.1 Inspection of Heat Exchanger and

-dliub eht ni smetsys noitalucric ria ehT

rectly.

Fans

The fans and the heat exchanger must be inspected every 4 years.

• Remove the mains plug (A) from the plug socket.

• Pull the ﬁ lters (B) out of the MTD-ERV 350.

• Remove the front plate by removing the screws (C).

• Push the front plate in the direction of the arrow and remove it from the MTD-ERV 350.

• Remove the sealing plate by removing the screws (D).

ﬁiceps ria 053 e MTD-ERVht esU cation

demrofrep ton era serusaem eseht fI

34 Instructions for the Installer

Designated as R

During installation of the sealing plate, its underside must ﬁ rst be inserted behind the raised edge so that a good seal is achieved.

MTD-ERV 350 – L

• Pull the tape (E) to remove the heat exchanger (F) and the drain plate (G).

• Remove the bypass duct (H) on the left-hand version of the MTD-ERV 350.

MTD-ERV 350 – R

• Remove the bypass duct (H) on the right-hand version of the MTD-ERV 350.

• Pull the tape (E) to remove the heat exchanger (F) and the drain plate (G).

Right-hand version

Then:

• Remove the heat exchanger (F) from the drain

plate (G).

Caution! There may still be water in the heat exchanger!

• 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.

Caution! On no account should aggressive or solvent-based cleaning agents be used.

Do not install the heat exchanger yet (the fans can be removed, inspected and cleaned, if necessary, in the following steps).

If an enthalpy heat exchanger is installed, observe the corresponding instruction.

Designated as L

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:

• Remove the plastic plate (I) in front of the PCB

panel by loosening the two screws.

• Loosen the connectors (J) and the earth cable (J) at the PCB panel and remove the cables with the two grommets (K) completely.

• Remove the complete fan casing (L) by pressing

Left-hand version

in the tabs (M).

• Remove the inlet neck (N) by pressing in the tabs around the fan casing.

• Clean the fans (O).

35Instructions for the Installer

Use a soft brush to clean the fan blades.

Remove dust using a vacuum cleaner.

– 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).

• Clean the ﬁ lter using a brush.

• Remove any caked soiling with a damp cloth.

• Install all the parts again in the reverse order.

• Carry out the self-test described under P76, 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.

Caution! Take care not to damage the fan blades.

Caution! Take care not to damage the temperature sensor.

• Install all the parts again in the reverse or-

der.

• Carry out the self-test described under P76, 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.

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 ﬁ lter of the preheater (if installed) must be cleaned every 4 years.

• Remove the mains plug (A) from the plug socket.

• Pull the ﬁ lters (B) out of the MTD-ERV 350.

• Remove the front plate by removing the screws (C).

• Push the front plate in the direction of the arrow 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.

• Loosen the connectors (J) and the earth cable (J) at the PCB panel and remove the cables with the two grommets (K) completely.

• Remove the cable (P) of the PCB panel.

• Remove the bottom (Q) of the preheater.

euqrot mumixam a ot swercs eht nethgiT

36 Instructions for the Installer

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 brieﬂ y 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 display.

Code Description

A0 NTC sensor TEWT defective. A1 NTC sensor T1 defective.

(= temperature of the outside air)

A2 NTC sensor T2 defective.

(= temperature of the supply air)

A3 NTC sensor T3 defective.

(= temperature of the return air)

A4 NTC sensor T4 defective.

(= temperature of the exhaust air) A5 Bypass motor malfunction. A6 Preheater motor malfunction. A7 Preheater does not heat up sufﬁ ciently. A8 Preheater becomes too hot. A10 NTC sensor Tch defective. A11 NTC sensor Trh defective. E1 Exhaust air fan not running (M1). E2 Supply air fan not running (M2). E3 Temperature sensor extractor hood too

high. EA1 Enthalpy sensor measures excessively

high moisture values. EA2 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 condensation drain is on the same side as the condensation drain ﬁ tting.

Inspect the components of the condensation drain every 2 years.

37Instructions for the Installer

4.7.2 Malfunction indications on the CC Ease Display à Remedy

This section contains tips on remedying the malfunctions described in section 4.7.1 that can appear on the CC Ease 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

CAUTION!

Avoid contact with the PCB

and frost protection

element due to risk

of electrocution

Yes

Then initiate the

self-test (P76 on 1)

Do the fan

and the PCB

(1.5 – 10 VDC)?

Press

until ’FiL‘ ’tEr‘ disappears

E1 / E2

Exhaust air/supply air fan

malfunction

Remove the filter,

the plastic front cover

and the metal cover

Do the fan

connection and the PCB

Replace the PCB

CAUTION: Reset unit

Remove the heat exchanger

and the foam part of the

bypass and replace the fan

38 Instructions for the Installer

Replace the PCB

CAUTION: Reset unit

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

Caution!

Avoid contact with the

PCB and frost protection

element due to risk of

electrocution

Yes

Turn hob off and

remove item from

heat source

Replace PCB

Caution:

Reset unit!

Caution!

Avoid contact with the

PCB and frost protection

element due to risk of

electrocution

Extractor hood temperature

cooking on the hob?

Yes No

MTD-ERV 350 switched off

sensor too high.

Is something

Resistance OK?

Replace

temperature sensor

via external switch

Caution!

Avoid contact with the

PCB and frost protection

element due to risk of

electrocution

Yes

Check sensor

resistance

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??

E A2

Cannot read out moisture

sensor

Connection

between sensor

and PCB OK?

Repair

connection

Yes No

Replace PCB

Caution:

Reset unit!

Resistance

OK?

Replace

temperature sensor

39Instructions for the Installer

CAUTION!

Avoid contact with the

PCB and frost protection

element due to risk of

electrocution

Replace the PCB

CAUTION: Reset unit!

A1 / A2 / A3 / A4

Temperature sensor malfunction

T1 / T2 / T3 / T4

Remove the plug from

the socket

Remove the filter, the plastic

front cover and the metal cover

Remove temperature

sensor from the PCB

Check temperature sensor

resistance; see table

Yes No

Is resistance OK?

[°C]

[KΩ

Replace the

temperature sensor

Temp Resistance [K!]

C MIN MED M AX

10 19.570 19.904 20.242

15 15.485 15.712 15.941

18 13.502 13.681 13.861

19 12.906 13.071 13.237

20 12.339 12.491 12.644

21 11.801 11.941 12.082

22 11.291 11.420 11.550

25 9.900 10.000 10.100

30 7.959 8.057 8.155

Yes

Replace cog

Motor bypass / frost protection element

Yes No

Remove the motor and

the cog (incl. plastic part)

Is the cog defective?

A5 / A6

malfunction

Remove the filter,

the plastic front cover and

the metal cover

Then initiate the

self-test (P76 on 1)

Is the motor

running?

Replace motor

Yes

Check connection and PCB;

12 VDC if motor is

running (see menu P76)

Does the

PCB register

current?

CAUTION: Reset unit!

Replace the PCB

40 Instructions for the Installer

CAUTION!

Avoid contact with the

PCB and frost protection

element due to risk of

electrocution

Remove the heat exchanger and

the frost protection element

(and also the foam part in case

Yes

of right-hand version)

Malfunction

Frost protection element does

not warm up (sufficiently)

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

Replace the PCB

Is resistance

of T1 OK?

Yes

If fuse is blown,

replace cable

CAUTION!

Avoid contact with the

PCB and frost protection

element due to risk of

electrocution

Is the resistance of

the cable of the frost

protection element

infinite?

Yes

Check resistance of the cable

and check connections with the

frost protection element

Malfunction

Frost protection element gets too hot

Remove the filter,

the plastic front cover and

the metal cover

Does the frost protection

element flap work properly?

(Check with P76)

Replace T1

temperature sensor

Check the following factors:

- Fan settings (too low?)

- Supply air valves (opened too wide?)

- The entire duct system (blockage?)

See A5 / A6 Malfunction section “Initiate self-test”

41Instructions for the Installer

CAUTION!

Avoid contact with the

PCB and frost protection

element due to risk of

electrocution

Replace PCB

Reset unit!

0 /A10 /A11

Malfunction

Temperature sensor

/ TCH / T

ghe

Check temperature sensor

resistance; see table

Yes No

Caution:

Resistance

OK?

temperature sensor

Replace

Temp.

[°C]

(°C)

Resistance

[KΩ

]

MIN . MED. MAX.

10 19.570 19.904 20.242

15 15.485 15.712 15.941

18 13.502 13.681 13.861

19 12.906 13.071 13.237

20 12.339 12.491 12.644

21 11.801 11.941 12.082

22 11.291 11.420 11.550

42 Instructions for the Installer

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 erusaem / kcehCesuaC

All OFF Supply voltage Check the fuse on the PCB panel.

High air delivery temperature in summer

Low air delivery temperature in winter

No or insufﬁ cient air supply, shower remains wet

Too noisy Fan bearings defective Replace

Leaking condensation Condensation drain clogged Clean

Wired 3-position switch does not function

Wireless 3-position switch does not function

Bypass remains closed Lower

Bypass remains open Increase

Filter clogged Replace

Valves clogged Clean

Heat exchanger clogged by dirt. Clean

Heat exchanger frozen Thaw

Fan dirty Clean

Ventilation ducts clogged Clean MTD-ERV 350 in frost mode

Fan settings Change

Scraping noise

• Siphon is empty

• Siphon does not seal

Whistling noise

• An air leak somewhere in the system

Air ﬂ ow noises

• Valves do not seal against duct.

• Valves not sufﬁ ciently open

Condensation from exhaust duct does not run into drain plate

Wiring is not OK Check the circuitry of the 3-position switch Switch is defective

Battery is discharged Check

• If the fuse is OK, the circuit board is defective.

.deliaf sah ylppus rewop sniam ehTegatlov ylppus oN

the comfort temperature.

the ﬁ lters.

the valves.

the heat exchanger.

the fan.

the ventilation ducts.

the fan bearings.

the ventilation control settings.

Install

the siphon again.

Seal

the air leak.

Install

the valves again.

Set

the valves again.

the condensation drain. Check whether

the connections are correct.

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].

• Voltage only on N & L3 & L1 or N & L3 & L2 & L1: [The fans run at position 3].

the battery.

• Replace the battery, if necessary.

43Instructions for the Installer

4.8 Spare Parts

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 PCB panel in top-mounted casing, Basic or Luxury version. 4 Temperature sensors T1 / T3 (in top of unit, on electronic carriage). 5 Temperature sensors T2 / T4 (in fan casing of both fans). 6 Servo motor & cable (for bypass and preheater) 7 Heat exchanger (or combined heat/enthalpy exchanger) 8 Filter clamp (2x) 9 Filter cloths (2x) 10 Filter set (with ﬁ lter clamps, ﬁ lter cloths and ﬁ lter holders). 11 Preheater (also available as an optional kit for subsequent installation). 12 Mounting frame for installation on the ﬂ oor (option). 13 Remote control transmitter (option) 14 Display (option).

44 Instructions for the Installer

4.9 Wiring Diagram: MTD-ERV 350 – LEFT-HAND Standard Version

Supply air

Green/ Yellow

Green/ YellowGreen/ Yellow

Bypass valve

Black

Red

Preheater valve

Red

White

Braun

White

Brown

Blue

White

Yellow

Black

White

Brown

White

Brown

White

Blue

Yellow

Exhaust air

Bathroom switch

Preheater

Blue

Brown

Blue

Brown

Blue

Brown

Enthalpy

45Instructions for the Installer

4.10 Wiring Diagram: MTD-ERV 350 – LEFT-HAND Luxury Version

Bypass valve

Black

White

Red

Brown

Red

Black

White

Brown

Green/ Yellow

Preheater valve

Supply air

White ( )

White

Brown

Blue (-)

Yellow (0-10V)

VENT.

FILT2/T4T1/T3BYP/PIE TRI

VENT. BS

T2/T4T1/T3BYP/PIE

White

Brown

White ( )

Blau (-)

Gelb (0-10V)

Bathroom switch

RJ11 RS232

Preheater

SA 1-3V

123

+ -

SAI 1-3V

LED

Brown

Blue

VENT.

(N) Blue

(L3) Brown

(L2) Black

(L1) Grey

VENT.

Brown

Blue

(N) Blue

(L3) Brown

(N) Blue

(L3) Brown

Malfunction

OFF

ERR

GND

0-10V OUT

Post-heater

External filter

Switch off Heat

Exchanger

FIE

GND

Bathroom

switch

Exhaust air

Tnav

T extractor

hood

Tah

GND

Tch

GND

010

Tge

GND

Extractor hood

switch

T.GHE

(IN 0-10V)

Analogue 2

010

GND

010

GND

Spare

(IN 0-10V)

Analogue 1

Analogue 3

Spare

12V

12Vhbha

GND

Spare

(IN 0-10V)

Analogue 4

Comm. Basis

Enthalpy

sensor

GND

Spare

12V

RS232 - PC

Comfo-

12VAbCCb

control

GND

CCa

RS232 - KFB

12V

GND

Artic

CC EASE

E/C

GND

Ext. Comm.

Extractor hood

L1 PE

LN PE

L2 PE PE

PE PE

46 Instructions for the Installer

4.11 Wiring Diagram: MTD-ERV 350 – RIGHT-HAND Standard Version

Exhaust air

Green/ Yellow

Green/ YellowGreen/ Yellow

Preheater valve

Black

Red

Bypass valve

Red

White

Braun

White

Brown

Blue

Black

White

Brown

White

Brown

White

Supply air

White

Yellow

Blue

Yellow

Bathroom switch

Preheater

Blue

Brown

Blue

Brown

Blue

Brown

Enthalpy

47Instructions for the Installer

4.12 Wiring Diagram: MTD-ERV 350 – RIGHT-HAND Luxury Version

Exhaust air

Preheater valve

Black

White

Green/ Yellow

Bypass valve

Red

Black

White

Brown

White

Brown

Blue (-)

VENT.

VENT. BS

T2/T4T1/T3BYP/PIE

White

Brown

White ( )

Yellow (0-10V)

White ( )

FILT2/T4T1/T3BYP/PIE TRI

RJ11 RS232

Blue (-)

Bathroom switch

Preheater

SA 1-3V

Brown

Blue

VENT.

(N) Blue

(L3) Brown

(L2) Black

(L1) Grey

VENT.

Brown

Blue

(N) Blue

(L3) Brown

(N) Blue

(L3) Brown

123

+ -

SAI 1-3V

LED

Malfunction

ERR

OFF

ERR

GND

Switch off Heat

Exchanger

GND

External filter

T extractor

FIE

Tch

GND

Tge

GND

Supply air

Tnav

hood

Tah

GND

010

GND

(IN 0-10V)

Analogue 2

GND

010

Spare

12V

12VEbEa

12Vhbha

GND

Spare

Comm. Basis

Enthalpy

sensor

GND

Spare

Comfo-

12V

12VAbCCbAaCCa

RS232 - PC

control

RS232 - KFB

GND

12V

GND

CC EASE

GND

Ext. Comm.

L1 PE

LN PE

L2 PE PE

PE PE

E/C

Extractor hood

0-10V OUT

Post-heater

Bathroom

switch

Extractor hood

switch

48 Instructions for the Installer

T.GHE

(IN 0-10V)

Analogue 3

Analogue 1

(IN 0-10V)

Analogue 4

Artic

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: : Heat Recovery Unit: MTD-ERV 350

Conforms to the directives : Machine Safety Directive (98/37/EC)

Zwolle, 16 June 2007 J.E. Stork Ventilatoren B.V.

)CE/73/89( )CEE/32/37( evitceriD egatloV woL

)CEE/86/39 ,CEE/13/29 ,CEE/633/98( evitceriD CME

E v Heuveln, General Managing Director

49Instructions for the Installer

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MTD SOLUTIONS LTD

Unit 1, Burgage Business Park, Blessington, Co. Wicklow, Ireland.

Tel: +353 (0)45 900 590 Fax: +353 (0)45 900 623

Email: info@mtd-solutions.com

www.mtd-solutions.com

MTD ERV 350, ERV 365 User Manual

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Frequently Asked Questions

User Manual