Zehnder Rittling ComfoAir E 350 Leitfaden

Cooling Ventilation FilteringHeating

ComfoAir E350

Manual for the user

2 - EN

Foreword

Please read this manual carefully before operating

the unit.

With the help of this manual, you can install, commission

or carry out maintenance on the ComfoAir E in a safe

and optimal manner. The ComfoAir E is hereinafter

referred to as the “unit”. As the unit is subject to

continuous development and improvement, your unit

may differ slightly from the descriptions in this manual.

The following symbols are used in this manual:

Symbol Meaning

Point of attention.

Risk of compromised performance or damage of the

ventilation system.

Risk of personal injury.

CHANGED

SAME

Questions

Contact the importer if you have any questions or wish

to order a new manual or new ﬁlters. The contact details

are given on the back of this document.

Use of the unit

■The unit may only be used once it has

been properly installed according to

the instructions and guidelines given in

the installer manual of the unit;

■Do not open the casing. The installer

makes sure that all components that

can cause personal injury are safely

located behind the casing;

■The unit may be used by: children of 8

years and older; persons with reduced

physical capabilities; persons with

reduced sensory capabilities; persons

with reduced mental capabilities

and persons with lack of experience

and knowledge, as long as they are

under supervision or have received

instruction about the safe use of the

unit and are aware of the hazards

involved;

■Children must not play with the unit;

■Children must not clean and maintain

the unit unsupervised.

The importance of good ventilation

Clean air in the home is very important for your health.

Did you know, for example, that you need 25 m3(25,000

litres) of clean, fresh air per hour? Furthermore, the CO2-

laden stale air must also be removed from the dwelling.

Good ventilation is therefore essential. Balanced

ventilation controls this for you in a comfortable way.

Breathing, cooking, showering and visiting the toilet: all

indoor activities generate moisture and result in a build-

up of stale air. Continual adequate ventilation is essential

to refresh air in the home – and thus keep it healthy

and comfortable. We would otherwise very quickly start

suffering from moulds, bacteria, dust mites, damp spots

and unwanted odours. But that is not all. What do you

think about health problems like allergies, respiratory

irritation and headaches? All issues that can affect your

health, concentration, functioning and performance.

This manual has been compiled with the utmost care. The publisher cannot be held liable for any damage caused as a

result of missing or incorrect information in this document.

EN - 3

Contents

Foreword .....................................................................................................................................................................................2

1 Introduction and safety..................................................................................................................................................................4

2 Operation.....................................................................................................................................................................................5

2.1 Overview of the unit and display ............................................................................................................................................5

2.2 Disengage child lock .......................................................................................................................................................5

2.3 Setting comfort temperature ...........................................................................................................................................6

2.4 Setting airﬂow rate ................................................................................................................................................................6

2.5 Bathroom switch...................................................................................................................................................................6

2.6 Available switches.................................................................................................................................................................6

2.7 Available sensors..................................................................................................................................................................6

3 Certiﬁcation and warranty ..............................................................................................................................................................7

4 Maintenance ................................................................................................................................................................................8

4.1 Replace ﬁlters ................................................................................................................................................................8

4.2 Cleaning valves/grilles...........................................................................................................................................................9

4.3 Cleaning controls..................................................................................................................................................................9

4.4 Topping up condensation drain ...........................................................................................................................................10

4.5 Clean the grilles ..................................................................................................................................................................10

5 Malfunctions ........................................................................................................................................................................11

I Installation/test report .................................................................................................................................................................12

II Maintenance log.........................................................................................................................................................................13

4 - EN

1 Introduction and safety

The unit is a balanced ventilation system with heat

recovery for energy-efﬁcient ventilation in homes.

Balanced ventilation means that stale air from the

kitchen, the bathroom, the toilet(s) and other wet rooms

is extracted, while the same amount of fresh air is

supplied to the living room, bedrooms and other dry

rooms. Gaps under the doors ensure a good airﬂow in

the dwelling.

Ensure that the gaps under or near

doors are never obstructed. For

example by furniture, draught excluders

or deep-pile carpet.

A balanced ventilation system consists of:

■The unit (A);

■Duct system for fresh and exhaust air (B);

■Duct system for supply and extract air (C);

■Supply valves in the living areas, bedrooms and any

other dry rooms (D);

■Return valves in the kitchen, bathroom, toilet and any

other wet rooms (E).

Use during calamities

If you have to close windows and doors during a

calamity, you must also switch off the unit. This can be

done in the following ways:

■Switch off the fuse to which the unit is connected in

the meter cupboard;

■Remove the plug from the socket to which the unit is

connected.

Safety Instructions

■Always comply with the safety

regulations in this document. Failure

to comply with the safety regulations,

instructions, warnings and comments

may lead to personal injury or damage

to the unit.

■Always observe the local building,

safety and installation guidelines of the

municipality, utility companies or other

authorities;

■Always connect air ducts with a

minimum length of 900 mm to the unit

before connecting the power supply to

prevent contact with the rotating fans.

■After installation, all parts that could

lead to personal injury are safely out of

reach behind the casing. The ComfoAir

cannot be opened without using tools.

■It is not permitted to modify the unit

or any of the speciﬁcations contained

in this document. This may result in

personal injury or reduced ventilation

system performance.

■Installation, commissioning and

maintenance must be carried out by

a certiﬁed person or company, unless

stated otherwise. If this work is carried

out by unauthorised persons, it may

result in personal injury or reduced

performance of the ventilation system.

■Always unplug the power cord before

starting any work on the unit. Using the

unit with the casing open may result in

personal injury. In this case, make sure

that no conductive or rotating parts can

be touched.

■Static charge can damage the

electronics. When working with

electronics, always take protective

measures to prevent electrostatic

discharge, such as wearing an antistatic

wristband.

■If the power cord is damaged, it must

be replaced by the manufacturer, the

service engineer or a qualiﬁed person to

avoid risks.

EN - 5

2 Operation

A number of important conditions must be met to ensure

the unit functions properly:

■Ensure that there is no condensation drier placed

in the same room as the unit. A condensation drier

could cause higher ambient humidity levels than the

unit is designed for.

■Ensure that the gaps under the doors are not blocked

by, for instance, furniture, rubber draught excluders

or long-pile carpets. These ensure a good airﬂow in

the dwelling.

■Ensure that there is no extractor hood connected to

the system.

2.1 Overview of the unit and display

Unit

Main screen of display

Menu screen of display

# Explanation

A Identiﬁcation plate with all important details of the unit (not

shown).

B 2 Filter caps for easy access to the ﬁlters.

C 2 Filters for air ﬁltering.

D Touchscreen display for readout and programming of the unit.

E Current airﬂow:

■No icon = No ventilation

■= LOW SETTING 1

■= MEDIUM SETTING 2

■= HIGH SETTING 3

F Current status:

■Green = The unit is operating correctly;

■Yellow = Replace ﬁlters;

■Red = Malfunction.

G Child lock is engaged.

H Icon for activating the menu screen.

I Icon for activating the comfort temperature menu.

J Icon for activating the ﬁlter replacement menu.

K Icon for activating the error readout menu.

L Icon for activating the installer/service menu.

M Arrow up:

■Increase value;

■To previous error alert.

N Arrow down:

■Decrease value;

■To next error alert.

O Selection check box for activating the text shown.

Any changes are saved.

P Arrow to return to the previous screen.

Any changes are NOT saved.

Q Icon for activating the options menu

2.2 Disengage child lock

If after 15 minutes the display on the unit has not been

operated, it will automatically return to the main screen

and engage the child lock. As long as the child lock

is engaged, the symbol will be visible on the main

screen. Disengage the child lock by pressing the display

of the unit for about 4 seconds until the symbol

disappears.

6 - EN

2.3 Setting comfort temperature

In summer, the unit uses outdoor air to ensure the indoor

temperature remains as comfortable as possible. This is

comparable to opening a window on a cool summer's

evening. The unit does this fully automatically based on

the programmed comfort temperature.

If the room temperature is higher and the outdoor

air temperature lower than the programmed comfort

temperature, the cooler outdoor air is brought into the

living areas, bypassing heat recovery.

It is best to set the comfort temperature to the

highest temperature of the room thermostat (of

the central heating system). This guarantees that

the heating and ventilation systems work together

properly. This is set to 21°C as standard.

In winter, the unit never blows outdoor air directly into

the dwelling without heat recovery. The unit determines

fully automatically whether it is summer or winter based

on the outdoor temperature.

1. Press the display of the unit for about 4 seconds until

the symbol disappears.

- The child lock is disengaged.

2. On the unit's display, press “MENU”.

- The menu is shown on the display.

3. Press “Temp”.

- The programmed comfort temperature is shown on

the display.

4. Press the up arrow to increase the comfort

temperature.

Press the down arrow to decrease the comfort

temperature.

5. Press the tick box to save changes and return to the

menu screen.

Press the return arrow to NOT save changes and

return to the menu screen.

2.4 Setting airﬂow rate

The unit is operated by a switch or a sensor. One or

more switches and/or sensors can be ﬁtted in the home

(e.g. in the kitchen).

If multiple switches and/or sensors are available

in the dwelling, then the unit applies the highest

ventilation setting.

Depending on the type of switch used, the unit is

operated automatically or manually. More information

regarding the use of any switches and sensors present

is given in the section on switches and sensors.

2.5 Bathroom switch

The unit is equipped with a timer control to remove

moisture from the bathroom as fast as possible. This is

done by ventilating at setting 3. The timer control cannot

be interrupted and lasts for 15 minutes. The timer of the

timer control begins to count down once the bathroom

switch is turned off.

2.6 Available switches

Appearance Name

SA 0-3 V

SAI Flash

(has a built-in malfunction or dirty

ﬁlter alert)

SA 1-3 V

RFZ

The unit's display only shows the ventilation setting.

A switch is needed to manually change the current

ventilation setting.

2.7 Available sensors

Appearance Name

CO2sensor 0-10 V

Humidity sensor 0-10 V

6 - EN EN - 7

3 Certiﬁcation and warranty

Warranty conditions

The manufacturer provides a warranty on the unit for

a period of 24 months after ﬁtting up to a maximum

of 30 months after the date of manufacture. Warranty

claims may only be submitted for material faults and/

or construction faults arising during the warranty

period. In the case of a warranty claim, the unit must

not be dismantled without written permission from

the manufacturer. Spare parts are only covered by the

warranty if these parts are supplied by the manufacturer

and have been installed by an approved installer.

The warranty is rendered invalid if:

■the warranty period has expired;

■the unit is used without ﬁlters;

■parts are used which were not supplied by the

manufacturer;

■unauthorised changes or modiﬁcations are made to

the installation;

■installation has not been carried out according to the

applicable regulations;

■defects are caused by incorrect connection,

incompetent use or contamination of the system.

The costs of disassembly and assembly are not covered

by the warranty provisions. This also applies to normal

wear and tear. Zehnder retains the right to change the

construction and/or conﬁguration of its products at any

time without being obliged to alter previously delivered

products.

Liability

The unit has been designed and manufactured for use

in balanced ventilation systems incorporating Zehnder

heat recovery systems. Any other application is seen as

inappropriate use and can result in damage to the unit

or personal injury, for which the manufacturer cannot

be held liable. The manufacturer is not liable for any

damage originating from:

■Non-compliance with the safety, operating and

maintenance instructions in this document;

■the use of components not supplied or recommended

by the manufacturer.

The responsibility for the use of such components lies

entirely with the ﬁtter;

■normal wear and tear.

Disposal

Make sure the unit is disposed of in an

environmentally friendly manner. Do not

dispose of the unit with your domestic

waste.

1. Contact the supplier regarding the options for

returning the unit.

2. If you cannot return the unit, consult the local

guidelines for recycling the parts.

3. Do not dispose of the batteries of wireless (RF)

controls in normal household waste. Hand them in at

the designated locations.

EEC declaration of conformity

The unit is CE approved and manufactured in:

Zehnder Group Nederland B.V.

Lingenstraat 2 • NL-8028 PM Zwolle

T +31 (0)38 429 6911 • F + 31 (0)38 422 5694

Company Register of Zwolle 05022293

8 - EN

4 Maintenance

Zehnder recommends concluding a maintenance

contract with a specialist company. Some companies

offer a maintenance contract in which user maintenance

can also be integrated.

To check whether the unit still works properly, a system

test may be carried out on the unit every six months. A

system test can be started in the SYSTEM TEST menu

(MENU> Login> SYSTEM TEST). If this menu is not

available, a system test is initiated automatically when

the unit is switched on. The system test takes about

5-10 minutes.

Do not disconnect the power to the

unit, unless instructed otherwise in the

manual. This can lead to a build-up of

moisture and results in problems with

mould.

Carry out the maintenance tasks every time

within the period indicated. If you fail to do this,

the performance of the ventilation system will be

affected.

Part of this system Limit Person responsible Procedure

Filter 6 months User Replace ﬁlters

Valves 6 months User Clean valves/grilles

Controls 6 months User Clean controls

Condensation drain 6 months User Top up condensation drain

Inspecting and cleaning system 2 years Fitter or service engineer -

4.1 Replace ﬁlters

When indicated you must replace the ﬁlters

. The following indication methods

are available:

■ The display on the unit shows the warning message:

REPLACE FILTERS

■ The control can show a message.

The manual of the control contains more information

about the indication on ﬁlter replacement.

Replace the ﬁlters at least every six

months. This will ensure a comfortable

and healthy air quality and will protect

the unit from pollution.

The warranty is rendered invalid if:

■Parts are used that have not been supplied by the

manufacturer;

■ The unit is used without ﬁlters.

When to replace the ﬁlters:

1. Order new ﬁlters: Contact your installation company

to order the right ﬁlters for you, or order the ﬁlters

online at www.international.zehnder-systems.com

2. Once you have received the new ﬁlters:

Press the display of the unit for about 4 seconds until

the symbol disappears.

- The child lock is disengaged.

3. Press “MENU”.

- The menu is shown on the display.

4. Press “Filter”.

- The unit enters standby mode.

5. Remove the two ﬁlter covers from the unit.

6. Remove the two dirty ﬁlters from the unit.

7. Place the two new ﬁlters in the unit with the arrows

pointing upwards.

8. Reﬁt the two ﬁlter covers to the unit.

Place the click connection of the ﬁlter covers on top

of the unit to guarantee an airtight lock.

9. Press the tick box to conﬁrm that the ﬁlters have

been replaced.

10. Press the tick box to reset the dirty ﬁlter timer.

- The unit resets to normal mode and returns to the

main screen.

11. Fill in the maintenance logbook (if present).

www.international.zehnder-systems.com

8 - EN EN - 9

9 10

4.2 Cleaning valves/grilles

Clean all valves at least once every six

months.

1. Hold the valve on its outer edge and pull it with a

rotating movement entirely from the wall or ceiling. If

a rubber ring is ﬁtted: Make sure when removing the

valve that the rubber ring remains in place.

2. Note the location and setting of the valve.

■Do not change the valve's settings. This could

affect the performance of the system;

■Do not swap the valves around. This could affect

the performance of the system;

3. Remove the ﬁlter behind the valve (if present).

4. Clean the valve with a soft brush, vacuum cleaner or

with soapy water.

5. Rinse the valve well and dry.

6. Replace the ﬁlter behind the valve (if present).

7. Place the valve back in the wall or ceiling.

Supply valve ComfoValve Luna S125

Example of valve

The ComfoValve Luna S125 supply valve is ﬁtted with

a removable design cap. This valve does not therefore

need to be removed from the wall or ceiling in its entirety

to clean it.

min. 350 mm

max. min.

Accessory / Zubehör

Discover the easy installation

of our supply air valve.

Zehnder ComfoValve Luna S125

www.ComfoValveLuna.com

Air Blocker

Rotate the design cap anticlockwise one quarter turn

and then remove the valve.

4.3 Cleaning controls

Clean all controls at least once every six months. Use

a dry cloth or a vacuum cleaner to remove dust. Do not

use water or any other ﬂuid. Prior to

cleaning the display on the unit, activate the child

lock to prevent any changes to the settings caused by

accidentally pressing the buttons.

10 - EN

4.4 Topping up condensation drain

To prevent sewer smells from entering your home, the

water seal of the domestic waste-water system must

always contain water. You can achieve this by pouring a

cup of water into the water seal.

4.5 Clean the grilles

Clean any grille present in and outside

your home at least every six months.

1. Remove the top cover of the external wall grille.

2. Clean the grille with a soft brush or vacuum cleaner.

3. Clean the grille with a soft brush or vacuum cleaner.

4. Place the grille back in the wall or ceiling.

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