Zehnder Rittling ComfoAir 70 Operating And Installation Instructions Download Page 45

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Model Identification

ComfoAir 70

ComfoAir 70 sensor

technology

ComfoAir 70

ComfoAir 70 sensor

technology

Unit configuration

1 Remote room

connection

1 Remote room

connection

2 Remote room

connections

2 Remote room

connections

Type of ventilator

Bi-directional

Type of drive motor

ECM, multi-speed

ECM, variable speed

ECM, multi-speed

ECM, variable speed

Type of heat recovery system

Recuperation

Thermal efficiency of heat recovery
[%]

Maximum air volume flow [cfm]

Electrical input power at maximum
airflow [W]

Sound power level [dBA]

Reference air volume flow [cfm]

Reference pressure difference
[in H

0.20

Specific power input at reference
airflow [W/cfm]

0.36

Control factor

1 manual

0.65 Automatic

1 manual

0.65 Automatic

Maximum internal and external
leakage rates [%]

Internal 0.1

External 0.9

Location of the filter warning

Warning located on system display

Internet address for instructions

www.zehnderamerica.com

Pressure fluctuation of the airflow
[%]

Air tightness of unit [cfm]

Summary of Contents for ComfoAir 70

Page 1: ...ComfoAir 70 Operating and installation instructions for users and installation technicians ...

Page 2: ......

Page 3: ...documents is the property of Zehnder Group Deutschland GmbH Publication as a whole or in parts requires the written approval of Zehnder Group Deutschland GmbH In house duplication designated for the evaluation of the product or for proper use is permitted and not subject to approval Trademarks All trademarks are recognized even if they are not separately labeled Our trademarks are acknowledged eve...

Page 4: ...r 9 3 1 Product description 9 3 1 1 Type label 10 3 1 2 Frost protection 10 3 1 3 Operation in residents with fireplaces 10 3 2 Functionality of the internal and external control panel 10 3 3 Operating functions and signaling from the control panel 11 3 3 1 Automatic operating mode 14 3 3 1 1 Functional principle of HUMIDITY sensor system module 14 3 3 1 2 Functional principle of CO2 VOC sensor sy...

Page 5: ...and repair by the skilled technician 32 4 3 1 Inspection and cleaning of enthalpy exchanger 32 4 3 2 Replacing the fans 34 4 3 3 Exchanging the control board 34 4 4 Visualization of fault notifications 35 4 4 1 Fault codes in the fault status 35 4 5 Technical descriptions 35 4 5 1 Pressure loss volume flow characteristic curves for design of adjoining room connection 36 4 5 2 Dimensions 37 4 5 3 M...

Page 6: ...Skilled workers must have the following qualifications Training in dealing with hazards and risks when installing and operating electrical devices Training for the installation and commissioning of electrical devices Knowledge of and compliance with the locally applicable building safety and installation regulations of the relevant local authorities or municipalities the regulation of the water ut...

Page 7: ...e must be carried out by an authorized person or company unless otherwise stated in this document Always disconnect the unit from the power supply before performing repair or maintenance on the ventilation system Following installation all parts that could lead to personal injury are safely shielded by the housing The unit cannot be opened without the use of a tool Do not disconnect the unit from ...

Page 8: ...lation of living areas and functional rooms Every other use is deemed as improper use and can lead to damage of the ComfoAir 70 or to personal injury for which the manufacturer cannot be held liable The manufacturer shall not be liable for any kind of damage that can be attributed to the following causes Failure to observe the instructions listed in this manual pertaining to safety operation and m...

Page 9: ...owder coated steel plate as well as covers made of aluminum in the RAL9016 color scheme The unit body made from a high quality expanded polypropylene EPP is used for accommodating the unit components and also makes sure there is the necessary insulation and unit soundproofing The ComfoAir 70 has two maintenance free 24 VDC radial fans with electronic commutation These fans and the control board re...

Page 10: ...mode is automatically activated 3 1 3 Operation in residents with fireplaces Joint operation in residents with fireplaces is only recommended when back draft prevention devices are installed and in compliance with applicable laws regulations and standards 3 2 Functionality of the internal and external control panel The control panels have touch sensitive buttons which means the respective operatin...

Page 11: ...The selection for the current fan speed 4 fan speeds with preset speeds for each fan is made by using the buttons Touching the button increases the fan speed to the next setting and touching the button decreases the fan speed to the next setting Fan speed 2 LS2 Fan speed 3 LS3 Fan speed 4 LS4 LED1 LIT LED1 2 LIT LED1 3 LIT LED1 4 LIT ...

Page 12: ...oost is active the operating modes Exhaust air mode and or Supply air mode that may be present are retained A boost duration with 5 120 minutes in 1 minute increments can be set with a programming module by Customer Service Factory setting 15 minutes LED 1 LIT during the active time phase Absent operating mode The Absent function is activated for a pre set time when LS1 fan speed is selected The a...

Page 13: ...ecently active fan speed when supply air fan is switched off display of LED1 3 as example Frost protection operating mode A temperature threshold which activates the Frost protection operating mode if not reached is stored for each fan speed Here the fan speed for the supply air fan is linearly regulated between the maximum and minimum set point depending on the outdoor temperature The fan speed c...

Page 14: ...d thus increases comfort and quality of life in the living areas Consequently an optimized ventilation response and prevention of mold formation is achieved which ultimately also leads to an increase in energy savings The ComfoAir 70 ventilation unit with an automatic sensor system module is classified in energy efficiency class A 3 3 1 1 Functional principle of HUMIDITY sensor system module The H...

Page 15: ...ve the unit will be controlled by the sensor that measures the highest levels The required hardware settings on the control system are only allowed to be made by competent qualified personnel 3 4 Maintenance by user If the maintenance work is not carried out regularly this will affect the functionality of the decentralized ventilation unit Replace the filters at least every six months This ensures...

Page 16: ...in the ComfoAir 70 must be checked in accordance with the relevant notification on the control panel and if needed must be replaced In doing so proceed as follows 1 Set the unit into the Standby operating mode 2 Remove the upper canopy by pulling it out of the guides in an upward direction as shown below 3 Insert your finger into the recess between the filter cover and the housing and pull the fil...

Page 17: ...Air 70 for more on this see the type label underneath the canopy of the unit The main power must always be connected providing the ComfoAir 70 does not have to be shut down due to a serious malfunction maintenance work or due to another urgent cause As soon as a main power is disconnected the living space will no longer be mechanically ventilated This makes it possible for problems involving moist...

Page 18: ...ccessories section in the Zehnder product program when installing the air ducts 4 2 Installation 4 2 1 General installation instructions The ComfoAir 70 is designed for installation in a conditioned space and on a outer wall The wall must be plumb and the unit must be installed vertically with the display on the bottom To mount the ventilation unit a wall mounting pipe available separately must be...

Page 19: ...he necessary accessories adapters bends sealing tape should be done prior to installing the drywall if possible The following points must be observed when installing the air ducts for a second room connection ComfoFlex ducts may be used to provide exhaust and or ventilation to a second room The use of the rear duct wall adapter an accessory available from Zehnder North America is required to provi...

Page 20: ... Once the drywall has been installed locate the rear duct wall adapter opening and cut the drywall opening to the inside diameter of the adapter Repeat if a second adapter was installed 7 Slip the outer male threaded ring over one of your hands with the threads oriented toward your fingers Insert that hand into the hole just created in the drywall for the duct adapter and hold the adapter securely...

Page 21: ...out of the guides in an upward direction and set aside 2 Remove the two screws at the bottom of the unit that secure the lower canopy to the wall bracket as shown below It is vital that an ESD armband be worn during work on the electrical system in order to protect the control board from electrostatic effects 3 Lift the lower canopy slightly and carefully disconnect the ribbon cable on the inner s...

Page 22: ...8 Slide the EPP body of the unit back into the metal wall bracket 9 Fasten the lower canopy with the left hand screw The lower canopy can now be pivoted While wearing a ESD band plug the ribbon cable into the control panel in the position shown in step 3 above 10 Attach the lower canopy in place on the wall bracket with the remaining right hand screw 11 Place the upper canopy onto the unit from ab...

Page 23: ...ion for the ribbon cable on the internal control panel A sensor system module optional accessory must be fitted in the unit before the unit is installed Proceed as follows for the installation of the ventilation unit 1 Pull the upper canopy upwards and out of the bracket and remove the right screw and loosen the left screw 2 Pivot the lower canopy to gain access to the back of the control panel an...

Page 24: ...he outside wall surface The cut must be perpendicular to the axis of the EPP pipe extension 9 Install the optional sensor system module per section 3 2 5 4 if applicable 10 As shown below push the ventilation unit with a clearance up to approximately 6 15 cm to the wall bracket into the wall mounting pipe so that the control board still remains freely available In order to make it easier to insert...

Page 25: ...ehind it if necessary the wall bracket must be adjusted using spacers 14 Pivot the lower canopy against the EPP housing In the process press the lower canopy slightly away from the wall bracket in order to pivot it in front of and past the edge of the wall bracket without interference Take care to ensure that the ribbon cable is located in the designated recess of the EPP housing when installing t...

Page 26: ...e into the connection box In accordance with protection class II protective insulation the wires for the main power supply line and the wires for the primary side power cable of the unit must be installed into the connection box with double insulation through the cable bushings 2 Slip a WAGO luminaire terminal from the installation kit onto one wire of the main power supply line 120V Black hot 240...

Page 27: ...side cable of the power supply to the 24 V X6 terminal on the main control board The low voltage secondary side of the power supply is polarity dependant Color coded power supply low voltage cable Termination point for 24 V X6 terminal red Positive black Negative RED BLACK Wires for secondary side cable unit power supply ...

Page 28: ...ng the lower canopy 4 2 5 3 Installing and connecting a sensor system module The installation and connection of a sensor system module should be completed prior to installing the ventilation unit In the event of a delayed installation the ventilation unit has to be withdrawn far enough out of the wall mounting pipe until the EPP housing is located in front of the side edge of the wall bracket Foll...

Page 29: ...oint SENSOR X8 on the control board Ensure that the sensor wires are connected correctly to the sensor X8 terminals per the table below Color coding for sensor cable Terminal point for SENSOR X8 Signal brown 1 Positive white 2 Negative green 3 CL yellow 4 DA 5 The four pin DIP switch MODE SW1 is used for the configuration of the Automatic function for the sensor system module If necessary correct ...

Page 30: ...with a programming module Factory setting is 15 minutes 4 2 6 3 Configuration of the Absent operating mode The temporary activation of fan speed 1 operates as the Absent function The active operating time of fan speed 1 of 15 30 45 or 60 min h can be set with a programming module Factory setting is 60 min h 4 2 7 Installing the exterior wall hood For the installation of the exterior wall hood one ...

Page 31: ...utside wall surface 5 Stick the self adhesive swelling sealing tape supplied with the installation kit onto the contour of the airflow features on the back as shown below 6 Install the back cover of the exterior wall hood onto the outside wall surface When attaching the back cover the cover must not bend If necessary loosen the screws so that the back cover is still installed tightly to the outsid...

Page 32: ... unit the exterior wall hood and the intake passage for the outdoor air must be regularly checked for debris and blockage Any possible debris occurring must be removed immediately The removal and installation of the exterior wall hood is described in 4 2 7 4 3 1 Inspection and cleaning of enthalpy exchanger In doing so proceed as follows 1 Disconnect the ComfoAir 70 from the power supply voltage 2...

Page 33: ...nger several times in warm water maximum 104 F 40 C Then rise off the enthalpy exchanger thoroughly with warm tap water only maximum 104 F 40 C Do not use aggressive or dissolving cleaning agents In order to dry it position the enthalpy exchanger such that residual water can run out of the apertures Instructions on correct disinfection methods can also be found on the manufacturer s website http p...

Page 34: ...lugs The structurally identical fans can be removed sideways out of the EPP pipe after the cables have been disconnected from the terminals on the control board while feeding the connected cables in at the same time 6 Following the inspection install all parts in the reverse order 7 Restore the power supply to the unit 4 3 3 Exchanging the control board The control board is located in the bottom l...

Page 35: ... a responsible installation technician 4 5 Technical description General specifications Description Value Heat exchanger type Enthalpy exchanger with polymer membrane Housing Interior lining Aluminum power coated free of thermal bridges interior lining is made of expanded polypropylene EPP to provide heat and sound insulation Duct connection diameter 4 100 mm Weight 59 lbs 22 kg Electrical connect...

Page 36: ...status of covers Weighted sound reduction index Rw p C Ctr dB Weighted normalized level difference Dn e w dB Supply and exhaust valves open 17 1 3 40 Supply and exhaust valves closed 25 1 4 48 4 5 1 Pressure loss volume flow characteristic curves for design of adjoining room connection 0 00 0 10 0 20 0 30 0 40 0 50 0 60 0 70 0 80 0 90 0 5 10 15 20 25 30 35 40 External Static Pressure in H2O Airflo...

Page 37: ...2mm 2 3 8 60mm 2 3 8 60mm 5 11 16 145mm 4 1 4 107mm 3 15 16 100mm 10 13 16 275mm 10 13 16 23 5 8 275mm 600mm 26 660mm 14 13 16 376mm 7 7 16 189mm Outdoor air Exhaust air Supply air Extract air 2 50mm 5 11 16 145 Top view Front view Back view Side view ...

Page 38: ... 137 5 39 137 19 8 503 4 41 112 7 75 197 4 69 119 7 75 197 5 24 133 25 9 658 17 87 454 2 76 70 2 0 51 1 57 40 0 59 15 Bore hole for wall bracket Cable feed through 9 84 250mm outer diameter of liner Outer contour for angular structural shell set CA70 contour Bore hole for wall bracket INSTRUCTIONS FOR SKILLED INSTALLERS ...

Page 39: ...ct air Sensor PHI VOC PHI CO2 DIP switch SW1 Switch No Function Factory setting 1 VOC CO2 sensor active ON 2 Humidity sensor active ON 3 Boost ventilation function OFF 4 Bathroom function OFF Internal control device Sensor PHI VOC PHI CO2 External control device Cable on site 110 or 220 V Power supply 24V DC 18W Isolating flap 1 Ventilator fan 2 Ventilator fan 1 Isolating flap 2 ...

Page 40: ...ycle at least every 6 months I II III IV 20 20 20 20 20 20 20 20 20 20 2 Exhaust air supplementary filter clean the filter in exhaust air valves filter change cycle approx 2 months I II III IV 20 20 20 20 20 20 20 20 20 20 3 Change other filters in the air pipe system I II III IV 20 20 20 20 20 20 20 20 20 20 Year Year Year Quarter Quarter Quarter APPENDICES ...

Page 41: ...Electrical controls Cable connections and clamping assemblies secure Yes No N A Are the regulating and control units operational Yes No N A 3 Air duct insulation Has cleaning if necessary been carried out Check OK For cleaning when needed see VDI 6022 Yes No N A Insulation and moisture barrier OK Yes No N A Are flexible connections between unit and air duct operational Yes No N A 4 Fan ventilation...

Page 42: ...ir duct if accessible Cleaning instructions provided Yes No N A 6 Extractor fan Cleaning instructions provided Yes No N A 7 Control system Operational Yes No N A 8 Filter optional Replacement or Cleaning instructions provided Yes No N A 9 Heat exchanger for waste heat recovery Cleaning instructions provided Yes No N A 10 Documentation material Available Yes No N A Function 1 Operational with rated...

Page 43: ... Supply air Fan stage No Room name Project design data Measurement data CFM CFM Exhaust air Fan stage No Room name Project data Measurement data CFM CFM P el W The listed measurement data must be determined in accordance with the components actually available Reference has been made to the hygienic requirements for operating the ventilation system Reference has been made to the influence of room a...

Page 44: ...at maximum airflow W 17 17 Sound power level dBA 47 47 Reference air volume flow cfm 25 25 Reference pressure difference in H2 O 0 0 Specific power input at reference airflow W cfm 0 36 0 36 Control factor 1 manual 0 65 Automatic Maximum internal and external leakage rates Internal 0 1 Internal 0 1 External 0 9 External 0 9 Location of the filter warning Warning located on system display Internet ...

Page 45: ...overy 76 76 76 76 Maximum air volume flow cfm 30 30 30 30 Electrical input power at maximum airflow W 17 17 17 17 Sound power level dBA 42 42 34 34 Reference air volume flow cfm 20 20 20 20 Reference pressure difference in H2 O 0 20 0 20 0 20 0 20 Specific power input at reference airflow W cfm 0 36 0 36 0 36 0 36 Control factor 1 manual 0 65 Automatic 1 manual 0 65 Automatic Maximum internal and ...

Page 46: ...on of the unit The product label applicable for the ventilation system is based on the installation of the system and the model identifier from the product data sheet The product label shows the following details from the product data sheet Energy efficiency class for average climate zone Sound power level L WA in internal spaces Maximum airflow volume Standard 35 cfm 35 cfm Sensor system APPENDIC...

Page 47: ...47 1 Room installation 30 cfm 30 cfm 2 Room installation ...

Page 48: ...bility EMC Part 6 1 Generic standards Immunity standard for residential commercial and light industrial environments EN 61000 6 3 2007 A1 2011 AC2012 A1 2011 Electromagnetic compatibility EMC Part 6 3 Generic standards Emission standard for residential commercial and light industrial environments EN 55011 2009 A1 2010 Industrial scientific and medical equipment Radio frequency disturbance characte...

Page 49: ...at the product series named in the following by virtue of its conception and design as well as in terms of the configuration placed on the market by us meets the relevant and essential health and safety requirements in the EAC certificate of the Eurasian Economic Union listed below Product name Decentralized waste heat recovery unit ComfoAir 70 Series Signed for an in the name of ...

Page 50: ...h America 6 Merrill Industrial Dr Suite 7 Hampton NH 03842 USA T 603 601 8544 info zehnderamerica com www zehnderamerica com Zehnder North America Version 1 8 September 2017 English subject to change without notice ...

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