Zehnder Rittling ComfoAir Compact CA155WM User manual

ComfoAir Compact
CA155WM / CA155CM / CA185WM
Mechanical Ventilation with Heat Recovery
User / Homeowner Guide
CA155WM CA155CM CA185WM

Contents
2
User / Homeowner Information Page
1.0 Ventilation In Your Home.......................................................................... 3
2.0 General Overview...................................................................................... 3
3.0 Controls ..................................................................................................... 4
4.0 Servicing and Maintenance...................................................................... 7
5.0 Guarantee .................................................................................................. 16

3
1.0 Ventilation In Your Home
1.1 Your home has a Heat Recovery Ventilation System installed. This consists of a continuously running Supply
and Extract System with Heat Recovery that is linked by a network of ducts to extract air on a continual basis
from the following areas (referred to as "wet rooms") in residential dwellings:
•Kitchen
•Utility Room
•WC/Cloakroom
•Ensuite Bath/Shower Room
And supply air continually to:
•Living Room
•Dining Room
•Bedroom
•Study
2.0 General Overview
2.1 The product incorporates a Heat Exchanger that recovers the heat energy from the "extract air" that would
normally be lost with other ventilation systems. It does this using minimal power consumption as the product
uses EC low energy motors.
2.1.1 DependingonthewayyourComfoAirCompactunithasbeeninstalled,thespecicoperationmayvary.
The unit has two speeds available:
I Low Speed: Operating on a continual basis
II High Speed: Activating manually using our ZGS2 switch or via “switch-live”
ZGS2 switch markings: Low (I) & High (II) operation
Note: Other manufacturers switches may show different markings, or your unit may be connected to
a Building Management System (BMS).
2.1.2 To maintain good indoor air quality within the dwelling it is important that the ventilation system remains in
operation at all times unless powered down periodically for maintenance/repair.
2.1.3 Warning: This appliance can be used by children aged from 8 years and above and
persons with reduced physical, sensory or mental capabilities or lack of experience
and knowledge if they have been given supervision or instruction concerning use of
the appliance in a safe way and understand the hazards involved. Children shall not
play with the appliance.
2.1.4 SitingNotes:Whereanopen-uedoilorgas-fuelledapplianceisinstalledinthe
kitchen,extractventilationcancausethespillageofuegases.Caremustbetaken
to ensure ventilation is reduced appropriately, as set out in the Building Regulations.
Kitchenswithsolid-fuelappliancesshouldnothaveextractfanstted.
Figure 1

4
3.0 Controls
This section covers how to operate your ComfoAir Compact Heat Recovery unit.
3.1 Integral LCD Display
Frost
Protection
LED
Service/Fault
LED
Summer
By-Pass
LED
Control Information Panel
Control
Button
USER / SERVICE / SETUP MENU
Below are examples/explanations of what you would see on your control panel.
S
USER / SERVICE / SETUP COMMISSIONING WIZARD
TATUSLOG
[09]
Example 1: Status / Service Log Screeen
Below are examples/explanations of what you would see through the Commissioning Wizard.
Top line - function / statement.
Bottom line - information within [ ] brackets is providing
you with information and cannot be changed.
O!UTDOO RTEMP!
oC7BOWLE
Example 3: Warning / Alert Message
Warning message - always indicated by flashing text and !! exclamation
marks. Please note that this message will time out and return to
the previous screen.
SUMMER BYPASS
<MAN .>
Example 2: Function Selection Screen
Top line - function / statement
Bottom line - shows you what the function setting is.
Text within < > angular brackets indicates an editable/changeable value.
MHU IDITYBOOST
[3 /9]
Example 4: Status Message
Top line - status message
Bottom line - shows the number of status messages for review and the
number you are viewing within the sequence.
  Note:Forspecicadjustmentdetails,pleaserefertorespectivefunctionshownonPage6,8and9.

3.1.1
Function Description
Smart Timer Smart Timer monitors the length of time that there has been an
occupancy presence detected within a “wet” room (via the Switch
Live)andprovidesaxedover-runtimeperiodtobestmatchthe
length of time that the Switch Live is active. (See 3.1.2 for adjust
function setting On/Off ).
Smart Humidity Smart Humidity monitors the ambient humidity within the “wet” room
environment and looks for short peaks of humidity made by either
showering or bathing. This smart technology ensures that your
ComfoAir unit is not on boost for prolonged periods of time.
(See 3.1.3 for adjust function setting On/Off ).
Smart Summer Bypass Smart Summer Bypass monitors the internal and external
temperatureandautomaticallyidentieswhentheltered
summer bypass needs to be activated, protecting your home from
overheating. (See 3.1.4 for adjust function setting Auto/Manual ).
Frost Protection Frost protection monitors the internal and external temperature
andautomaticallyidentieswhenthefrostprotectionneedstobe
activated, protecting your unit from freezing.
3.1.2 Smart Timer
To adjust the Smart Timer Mode:
•Press control button to activate panel
•Scroll to “User Menu” option and press button to enter
•Scroll to “TimerSmart” option and press button
•Thecurrentsettingstatuswillash
•Rotate button to desired outcome
•Presstoconrm
•Screen will time out after 30 seconds
Factory set to ON Options ON / OFF
3.1.3 Smart Humidity
To adjust the Smart Humidity Mode:
•Press control button to activate panel
•Scroll to “User Menu” option and press button to enter
•Scroll to “HumidiSmart” option and press button
•Thecurrentsettingstatuswillash
•Rotate button to desired outcome
•Presstoconrm
•Screen will time out after 30 seconds
Factory set to ON Options ON / OFF
TI M E R S M A R T
< O N >
HU M I D I S M A R T
< O F F >
5

3.1.4 Smart Summer Bypass Manual Override
To manually override the Smart Summer Bypass Mode:
•Press control button to activate panel
•Scroll to “User Menu” option and press button to enter
•Scroll to “Summer Bypass" option and press button
•Thecurrentsettingstatuswillash
•Rotate button to desired outcome
•Presstoconrm
•Screen will time out after 30 seconds
Note:
•If "manual" option selected, the option will be available to
"OPEN" or "SHUT" the summer bypass
•Rotatebuttontodesiredoutcomeandpresstoconrm
•Rotate button to select period of time required
•Presstoconrm
Factory set to AUTO Options AUTO / MAN
Note:
Unit will return to “Auto Mode” at the end of the manual time out period.
Unit will not allow the Summer ByPass to be opened at temperature below 7oC.
3.1.5 Ventilation Speed Control for ZGS2
The ZGS2 is a hard wired switch used to switch between Low and High speed
•Press the switch towards the (I) to activate the Low Speed
•Press the switch towards the (II) to activate the High Speed
SU M M E R B Y P A S S
< M A N . >
6

7
4.0 Servicing & Maintenance
4.1 Warning: The units must be isolated from the Mains Supply before
commencing any service or maintenance work.
4.1.1 Your ComfoAir unit contains self-cleaning backward curved impellors that require no servicing.
Note: The motors have sealed for life bearings, which do not require lubrication.
Periodic cleaning of the ceiling supply and extract valves should be carried out as required, taking care not to
adjust the valves set position, as this may cause an unbalanced system, resulting in either under-ventilation
or unnecessary over-ventilation occurring.
  Periodicinspectionand/orreplacementofltersshouldbecarriedout.Frequencygreatlydependson
geographiclocationandurbandensity.Thelterstrapdirtintheatmosphereandactasprotectionforboth
thesystemandthedwelling.Thesystem’sairowcanbereducediftheltersarenotreplaced,thiscanaffect
overallsystemperformance.Forthisreason,itisimportanttochecktheltersregularlyandtoreplacethem
as often as each year (See Sections 4.1.8, 4.1.9 and 4.2.0).
  Periodicinspectionand/orcleaning/replacementoftheheatexchangershouldbecarriedout.Thelters
shouldhelptoprotecttheheatexchangerbutovertime,dirtintheatmospherecanpenetratethelters
andgainaccesstotheheatexchanger.Thesystem’sairowcanbereducediftheheatexchangerisnot
cleaned/replaced and this can affect overall system performance. For this reason, it is important to check the
status of the heat exchanger regarding the time remaining indicated on the display (See Sections 4.2.1, 4.2.2
and 4.2.3).
  Pleasecontactusforreplacementltersandheatexchangers.
4.1.2 Service Indicator
  IftheltersortheheatexchangerneedsreplacingtheLEDwiththeServicesymbol will appear.
To establish what needs to be replaced, you will need to access the Service Menu and review the Service
Log.
4.1.3 Service Log
This enables you to identify what your system requires, to review the Service Log:
•Press control button to activate panel
•Scroll to “Service Menu” option and press button to enter
•First option is the “Service Log” which indicates the number of
logs for review
•Rotate button and press
•Scroll through each log and press button to return back to
main options within the Service Menu
NOTE: If "fan failure" log is showing please contact us or your installer.
SE R V I C E L O G
[ 0 3 ]

4.1.4 Filter Status
IftheFilterstatuswithinthe“ServiceLog”isshowingas0daysthelterswillneedtobereplaced(See
Sections 4.1.8 CA155WM, 4.1.9 CA155CM and 4.2.0 CA185WM).
•Press control button to activate panel
•Scroll to “Service Menu” option and press button to enter
•First option is the “Service Log” which indicates the number of
logs for review
•Scroll to “Filter Change” option and press button
•Therequesttoresettimerwillash
•Presstoconrm
•Screen will time out after 30 seconds
4.1.5 Heat Exchanger Status
If the Heat Exchanger status within the “Service Log” is showing as 0 weeks the heat exchanger will need to
be replaced (See Section 4.2.1 CA155WM, 4.2.2 CA155CM and 4.2.3 CA185WM).
•Press control button to activate panel
•Scroll to “Service Menu” option and press button to enter
•First option is the “Service Log” which indicates the number of
logs for review
•Scroll to “H/Exch Change” option and press button
•Therequesttoresettimerwillash
•Presstoconrm
•Screen will time out after 30 seconds
Note:Ifyoucleanyourheatexchangerduringtheperiod,donotadjustthetimer.
4.1.6 Run Time
To review the length of time your unit has been in operation:
•Press control button to activate panel
•Scroll to “Service Menu” option and press button to enter
•Scroll to "Runtime - Days" option to review
(time shown in days)
•Screen will time out after 30 seconds
4.1.7 SoftwareIdentication
To review what software version is activated on your unit:
•Press control button to activate panel
•Scroll to “Service Menu” option and press button to enter
•Scroll to “Software” option to review
•Screen will time out after 30 seconds
CH A N G EF I L T E R
< 3 6 5 d >
CH A N G EH / E X C H
< 1 0 w >
R U N - D A Y ST I M E
[ 70 3 0 ]
S O F T W A R E
[ v .1 9 ]
8

4.1.8 To replace the ComfoAir CA155WM Filters
•Replace at approximately 1 year interval.
HR155WM FILTER step1
1
2
HR155WM FILTER step2
Step 1 Isolate ComfoAir CA155WM from the
Mains Supply. Pull down the top part (u)
of the two front panels and lift out (v) of
locating tabs at the bottom.
Step 2 Removebothltersfromtheunitbythe
handles.
HR155WM FILTER step3
HR155WM FILTER step1
2
1
Step 3 Re-insertnewltersintotheunit. Step 4 Locate the front panels in the bottom tabs
(u) and click them back into place at the
top (v). Turn the Mains Supply back on.
Reset Filter Status (See Section 4.1.4).
4.1.9 To replace the ComfoAir CA155CM Filters
•Replace at approximately 1 year intervals.
HR155CM heatexchanger step1
2
3
1
HR155CM FILTER step2
Step 1 Isolate ComfoAir CA155CM from the
Mains Supply. Rotate and unlock the tabs
(u), Slightly pull down the top part (v) of
the front panel and pull out (w) of locating
tabs and condensate connection located
at the bottom of the unit.
Step 2 Removebothltersfromtheunitbythe
handles.
Note: Take care when removing lid as a small amount of water maybe present.
9

HR155CM FILTER step3
HR155CM heatexchanger step6
21
3
Step 3 Re-insertnewltersintotheunit. Step 4 Re-connect the front panel (u) into the
condensation connection point and the
bottom locating tabs and position back
against the unit (v). Rotate the two
retaining latches to secure (w). Turn the
Mains Supply back on. Reset Filter Status
(See Section 4.1.4).
4.2.0 ToreplacetheComfoAirCA185WMFilters
•Replace at approximately 1 year intervals.
HR185WM FILTER step1
2
1
HR185WM FILTER step2
Step 1 Isolate ComfoAir CA185WM from the
Mains Supply. Pull down the top part of
the two front panels (u) and lift out (v)
of locating tabs at the top of the valance
panel.
Step 2 Removebothltersfromtheunitbythe
handles.
HR185WM FILTER step3
HR185WM FILTER step4
1
2
Step 3 Re-insertnewltersintotheunit. Step 4 Locate the front panels in the tab at the
top of the valance panel (u) click them
back into place at the top (v). Turn the
Mains Supply back on. Reset Filter Status
(See Section 4.1.4).
10

4.2.1 To Clean and Replace the ComfoAir CA155WM Heat Exchanger
•Clean approximately at two year intervals.
•Replaceapproximatelyatveyearintervals.
HR155WM FILTER step1
1
2
HR155WM heat exchanger step2
Step 1 Isolate ComfoAir CA155WM from the
Mains Supply. Pull down the top part (u)
of the two front panels and lift out (v) of
locating tabs at the bottom.
Step 2 Unscrew the six heat exchanger locating
screws and remove panel.
HR155WM heat exchanger step3
HR155WM heat exchanger step4
Step 3 Remove the heat exchanger by gently
pulling on the nylon strap, taking care
not to damage it. Clean each face of the
heat exchanger with a vacuum cleaner
and wash with warm water. Ensure heat
exchanger is dry before continuing to
Step 4.
Step 4 Re-insert the cleaned or new heat
exchanger, taking care not to cause
damage.
HR155WM heat exchanger step2
HR155WM FILTER step1
2
1
Step 5 Reposition the panel and secure with the
six locating screws.
Step6 Locate the front panels in the bottom tabs
(u) and click them back into place at
the top (v). Turn the Mains Supply back
on. Reset Heat Exchanger Status (See
Section 4.1.5).
Important Note: Do not attempt to clean the heat exchanger with detergent.
11

4.2.2 To Clean and Replace the ComfoAir CA155CM Heat Exchanger
•Clean approximately at two year intervals.
•Replaceapproximatelyatveyearintervals.
HR155CM heatexchanger step1
2
3
1
HR155CM heatexchanger step2
Step 1 Isolate ComfoAir CA155CM from the
Mains Supply. Rotate and unlock the tabs
(u), Slightly pull down the top part (v) of
the front panel and pull out (w) of locating
tabs and condensate connection located
at the bottom of the unit.
Step 2 Unscrew the six heat exchanger locating
screws and remove panel.
Note: Ensure you support the Heat
Exchanger cover when removing the
nalscrew.
Note: Take care when removing lid as a small amount of water maybe present.
HR155CM heatexchanger step3
HR155CM heatexchanger step4
Step 3 Supporting with your hand, gently
remove the heat exchanger, taking care
not to tilt it to an angle as water will be
present. Clean each face of the heat
exchanger with a vacuum cleaner and
wash with warm water, take care not to
cause damage to the unit. Ensure heat
exchanger is dry before continuing to
Step 4.
Step 4 Re-insert the cleaned or new heat
exchanger, taking care not to cause
damage. Support in place with hand until
completing Step 5.
HR155CM heatexchanger step5
HR155CM heatexchanger step6
21
3
Step 5 Reposition the panel against the unit and
secure with the six locating screws.
Step6 Re-connect the front panel (u) into the
condensation connection point and the
bottom locating tabs and position back
against the unit (v). Rotate the two
retaining latches to secure (w). Turn
the Mains Supply back on. Reset Heat
Exchanger Status (See Section 4.1.5).
12

4.2.3 ToCleanandReplacetheComfoAirCA185WMHeatExchanger
•Clean approximately at two year intervals.
•Replaceapproximatelyatveyearintervals.
HR185WM FILTER step1
2
1
HR185WM heatexchanger step3
2
1
3
Step 1 Isolate ComfoAir CA185WM from the
Mains Supply. Pull down the top part of
the two front panels (u) and lift out (v)
of locating tabs at the top of the valance
panel.
Step 2 Unscrew the two valance screws (u) and
lift out (v) of locating tabs at the bottom
and remove valance (w).
HR185WM heatexchanger step4
Step 3 Unscrew the six heat exchanger locating
screws and remove panel.
Step 4 Remove the heat exchanger by gently
pulling on the nylon strap, taking care
not to damage it. Clean each face of the
heat exchanger with a vacuum cleaner
and wash with warm water. Ensure heat
exchanger is dry before continuing to
Step 5.
HR185WM heatexchanger step7
Step 5 Re-insert the cleaned or new heat
exchanger, taking care not to cause
damage.
Step6 Reposition the panel and secure with the
six locating screws.
13
HR185WM heatexchanger step5
HR185WM heatexchanger step6

HR185WM heatexchanger step8
2
1
3
Step 7 Locate the valance panel (u) in the
bottom tabs (v) and secure in place with
two screws (w).
Step8 Locate the front panels in the bottom tabs
(u) and click them back into place at
the top (v). Turn the Mains Supply back
on. Reset Heat Exchanger Status (See
Section 4.1.5).
14
HR185WM FILTER step4
1
2

4.2.4 Access for Maintenance
4.2.5 Footprint of ComfoAir CA155WM
500mm
HR155WM
Top View
4.2.6 Footprint of ComfoAir CA155CM
500mm
HR155CM
Side View
4.2.7 FootprintofComfoAirCA185WM
600mm
HR185WM
Top View
15

Zehnder Group International Sales • Almweg 34 • 77933 Lahr • Germany
T [phone] • F [phone]
[email protected] • www.zehnder-systems.com
05.10.1021 Issue 1 Sept 2013
5.0 The Guarantee Period
5.1 This Zehnder product (ComfoAir CA155WM / CA155CM / CA185WM) has a 2 Year Guarantee.
5.1.1 This does not affect your statutory rights.
5.1.2 Full details available on request.
All information is believed correct at time of going to press. E&OE.
All goods are sold according to Zehnder’s Standard Conditions of Sale which are available on request.
All dimensions referred to are in millimetres unless otherwise stated.
ZehnderGroupInternationalSalesreservestherighttochangespecicationsandpriceswithoutpriornotice.
© Copyright Zehnder Group 2013