AirTech ACR35-SELV Assembly instructions
ACR35-SELV & ACR35CV-SELV
Installation and Wiring Instructions
All wiring to be in accordance with the current I.E.T.
Regulations, or the appropriate standards of your country and
MUST be installed by a suitably qualified person.
The Fan is suitable for installation within Zones 1 & 2.
The Fan should be provided with a local isolator switch
capable of disconnecting all poles, having a contact separation
of at least 3mm.
Ensure that the mains supply (Voltage, Frequency, and Phase)
complies with the rating label.
The Fan should only be used in conjunction with the
appropriate Airtech products.
The fan should only be used in conjunction with fixed wiring.
When the Fan is used to remove air from a room containing a
fuel-burning appliance, ensure that the air replacement is
adequate for both the fan and the fuel-burning appliance.
The Fan should not be used where it is liable to be subject to
direct water spray for prolonged periods of time.
Where ducted Fans are used to handle moisture-laden air, a
condensation trap should be fitted. Horizontal ducts should be
arranged to slope slightly downwards away from the Fan.
This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental capabilities,
or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the
appliance by a person responsible for their safety.
Young children should be supervised to ensure that they do
not play with the appliance.
IPX7
SAFETY AND GUIDANCE NOTES
Open up the internal cover to access
The spirit level bubble
The fan is a continuously running extract fan for kitchens, utility rooms, bathrooms and
toilets. The electrical supply to this fan is 12V DC SELV from the mains controller. This
means that the fan may be installed within reach of a person using a fixed bath or
shower, i.e. in a nearby wall. However, for reliable operation, the fan must not be
placed where it could be submerged in water or regularly exposed to direct water
spray, e.g. from a shower head whether permanently fixed or movable.
The product incorporates an airflow detection system that detects the installation duct
resistance and maintains the correct fan speed to achieve the preset extract flow rate
(model dependant).
The incorporated LED display allows the installer to configure the fan to suit its
installation. The display is also used to show the day logger and power run meter.
The fan can be wall, window or panel mounted.
WALL KIT stock ref. – ESG100WALL
WINDOW KIT stock ref. - AWK100
PANEL KIT stock ref. - ACKS100
150mm CONVERSION KIT stock ref. - ACR-CK46
SITING THE CONTROLLER
1. The controller must not be installed in a shower cubicle or enclosure. It must be sited
away from direct sources of water spray and out of reach (1.5m) of a person using a
fixed bath or shower.
2. Site away from direct sources of heat. Ambient temperature range 0 to 40ºC. Do not
site in an area containing excessive levels of grease.
3. Decide where to site the controller and fan and work out the required cable runs.
PANEL MOUNTING
1. Cut a 105mm diameter hole.
2. Remove the front panel by carefully pulling
away from the fan.
3. Loosen the two self-retaining screws and
remove the inner grille by carefully pulling
away from the housing.
4. Using the built in spirit level bubble as an
aid. Mark the screw centres through the
holes in the fan back plate. Drill, plug and
screw into position. Attach ducting as
required for the installation.
5. Wire the fan as described in Wiring
Section. Adjust any settings as required (see
Setup Section).
6. After installation, ensure impeller rotates freely.
7. Replace the inner grille and tighten the retaining screws. Replace the front panel.
INSTALLATION
DESCRIPTION
ACCESSORIES
WALL MOUNTING
1. For wall mounting cut a 117mm diameter hole through the wall and insert the
wall sleeve. Slope the sleeve slightly downwards away from the fan. Where
necessary cut to length and cement both ends into position flush with the wall
faces.
2. Fix exterior grille into position with the louvres positioned downwards.
3. Remove the front panel by carefully pulling away from the fan.
4. Loosen the two self-retaining screws and remove the inner grille by carefully
pulling away from the housing.
5. Using the built in spirit level bubble as an aid. Mark the screw centres through
the holes in the fan back plate. Drill, plug and screw into position.
6. Wire the fan as described in Wiring Section. Adjust any settings as required (see
Setup Section).
6. After installation, ensure impeller rotates freely.
7. Replace the inner grille and tighten the retaining screws. Replace the front panel.
WINDOW MOUNTING
1. Refer to window kit instructions supplied with the kit.
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE
ISOLATED FROM THE POWER SUPPLY DURING THE INSTALLATION / OR
MAINTENANCE.
IMPORTANT
The Controller MUST be surface mounted to allow air to freely circulate around
the unit.
When installed in a loft void it MUST NOT be enclosed or covered with insulation.
The cross-sectional area of supply cord used should be ranged from 1 -1.5mm2.
Cable entry can be made from the rear or the side of the fan using the grommet
provided.
1. Follow the wiring diagrams shown.
2. Check all connections have been made correctly and ensure all terminal
connections and supply wires are securely fastened.
3. Ensure the impeller rotates and is free from obstructions.
Accessing the commissioning menu
To configure the fan first remove the grille. With the grille removed the control buttons
are visible (Fig.4). Do NOT isolate the fan from the power supply as configuration
requires power to the fan.
IMPORTANT
Do NOT attempt to remove the circuit board cover (Fig.4). This covers the
high voltage power supply, preventing the risk of an electric shock.
WIRING
SETUP
Display modes
When first powered on, the display will run through an initialisation sequence and then
activate prism mode (cover on).
When a button is pressed, the display will go into the menu system and display as
viewed without the prism.
The display will return to prism mode after 30 seconds of inactivity (i.e. no button
presses).
When activating the menu, the initial button push will not change any settings.
Prism mode may also be re-activated by holding the pull-cord for 5 seconds (if
applicable).
Prism Mode
When the controller is in ‘prism mode’ the display will be mirrored such that the
characters are shown correctly when viewed through the prism fitted in the fan cover.
When activated, prism mode will run for 15 minutes, first showing the day logger then
cycling between displaying:
Airflow rate (CV model only, other models display speed setting)
Estimated duct pressure (CV model onlyifCV/F‐2modeenabled)
Current RH% (HT models only)
Calibration process will run after the first 15 minutes (if CV / F-2 mode enabled); see
Advanced settings for further details.
Menu
If the buttons are pressed the display goes from prism mode to direct view mode and
menu activated. If the buttons are not pressed for 30 seconds the display reverts to
prism mode.
The (Up) button is used to increase the value of a
setting, the (Down) button is used to reduce the value
of a setting and the (Mode/Set) button is used to
advance to the next menu item.
The fan has the following ‘menu’ modes:
Standard (press any button from normal runtime - )
Advanced/Engineer (hold + for 5 seconds from the standard menu)
Data-logger readout (hold for 5 seconds from standard menu)
Standard settings:
Display
text
Configuration
Option
Selections Default
r‐n Rotatedisplay r‐Y=displayrotated r‐n=displaynormal r‐n
trI Tricklespeed
adjustment
100mm:0*,5to30l/s(MaxlimitedbyBoostSelection) 9l/s
bSt Boostspeed
adjustment
100mm:6to35l/s(MinlimitedbyTrickleSelection) 15l/s
b15 BoostOverrun
time
b0tob30–0to30minutes(0disablesoverrun) 15
h70 Humiditylevel
trigger
h40toh90‐40%to90%relativehumidity 70%
RH
F‐0 FanControlMode F‐0=CVdisabled,wall/
windowinstallation
F‐1=CVdisabled,
ductedinstallation
F‐2=CVConstant
Volumeenabled
F‐0
c‐n Comfortmode c‐n=normalLSoverrun c‐Y=comfortmode c‐n
unl
Enable/disable
lockcode
loc‐lockcodeenabled unl‐lockcodedisabled
(unlocked)
unl
‐‐‐
Menulockcode
Up/downselectscurrentdigit,Xmovestonextdigit.
10c
cod Tochangethelockcodewhen“cod”isdisplayedselecttheup/down
buttonstoselectadigitthenselectXtomoveontothenextdigit.
*If “0” is selected, the fan switches to Intermittent mode.
Advanced settings:
Displaytext Configuration
Option
Selections Default
A‐Y RHAmbient
Response
A‐YAmbientResponse
enabled
A‐nAmbientResponsedisabled Enabled
P‐Y RHRapid
Response
enable
p‐Y=RapidResponseenabled p‐n=RapidResponsedisabled Y
Settings
Speed selection
Set trickle and boost speeds in l/s by using the and buttons.
To convert m3/h to l/s, divide the m3/h by 3.6 (e.g. 54m3/h / 3.6 = 15 l/s).
The Trickle Speed cannot be higher than the Boost selection. Therefore it might be
necessary to modify the Boost selection before increasing the Trickle setting.
If “0” is selected for the trickle speed, the fan will be off until a boost signal is activated
(for example via LS/ pullcord/humidity).
Boost time
The boost setting allows the boost timer to be adjusted from 1-30 minutes, the default
is 15 minutes. This option may also be disabled, thus removing the option from the
menu and setting the overrun to 0.
Inbuilt Ambient Response Humidistat with Rapid Rise Detection
The humidity threshold setting defines at what relative humidity the fan will trigger,
adjustable from 40% to 90% rH. The fan increases in speed slowly between the trickle
and boost speeds between the trigger %rH and +10%. The trigger point will
automatically adjust if the temperature drops below 18C to prevent nuisance triggering.
The fan also incorporates a rapid rise function to detect rapid rises in humidity when the
ambient %rH is under the threshold setting. If a rapid rise is detected the fan will
increase in speed proportionally between the trickle and boost settings until the
humidity lowers again.
Comfort mode
With comfort mode disabled, the fan will go into boost as soon as an LS (Light
Switch) input is detected and over-run for the set period after LS is disconnected.
With comfort mode enabled, the fan will remain off / in trickle up to a maximum of
20 minutes. Once LS is deactivated, fan will run at boost mode for the length of
time LS was present up to a maximum of 20 minutes plus the set over-run time.
If the LS was activated for < 3 minutes, no boost will occur to prevent nuisance
activations.
Fan Control Mode
There are 3 modes for fan speed control. Wall, ducted and constant airflow/ volume
(CV) mode (CV - Pro models only). In wall or ducted mode, the fan speeds are pre-
determined at the factory and does not use the airflow sensor.
In CV mode (Constant Airflow/Volume), the fan will automatically adjust the fan speed
to maintain the desired airflow. After the first 15 minutes of operation the fan enters
calibration mode to determine the most efficient mode of operation.
Calibration Reset
In some circumstances it may be necessary to reset the calibration settings (if the fan
was covered to prevent dust/damage/or poor weather outside).
Reset the calibration by configuring the fan for wall or duct mode (F-0 or F-1), turn the
product off and on and re-configure back to CV mode (F-2).
The fan will calibrate after 15 minutes or by holding the pullcord for 5 seconds.
Pullcord
Switches the fan from trickle to boost (for boost overrun time)
o If the overrun time has been set to 0 (disabled), a default overrun duration
of 5 minutes will take place.
This will override LS comfort mode, boosting the fan immediately
An activation when a Pullcord/LS (Light Switch) boost is already active shall cancel
overrun timer (RH boost sources remain unaffected)
Data Logger Menu
* When the display is rotated the decimal point will no longer display; eg. 055 represents
5.5KWh
Cutting the power to the fan will not erase the stored data. To reset the data, hold
pullcord for 14 seconds while in the data logger menu.
Data Examples
Text scrolling from right to left
In this example the display is showing a total run time of 1 year and 237 days.
Text scrolling from right to left
In this example the display is showing 34Wh of energy consumption in the previous
24h.
Returning to commissioning mode
A further 5 second press of the Mode button will return the fan to the commissioning
menu.
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST
BE ISOLATED FROM THE POWER SUPPLY DURING MAINTENANCE.
1. At intervals appropriate to the installation, the fan should be inspected and cleaned
to ensure there is no build-up of dirt or other deposits.
2. Carefully pull the front panel off the inner grille. (fig. 4)
3. Wipe the inlets and front face with a damp cloth until clean. Be careful not to push
dirt into the airflow sensor. (CV model only)
The fan has sealed for life bearings, which do not require lubrication.
Display text Description
tot run 00y 00d Total run time in years and days
Tri run 00y 00d Trickle speed run time in years and days
Boo
r
un 00d Boosted run time in days
rhu run 00d Humidity boosted run time in days
tot EnErgy 00.0 Total Energy used displayed in KWh*
24h EnErgy 00 Energy used in last 24 hours displayed in Wh
SERVICING AND MAINTENANCE
Siting
the
fan.
~
N
L
1 Phase Supply
(220-240V 50Hz). FUSE
Switched
Fused Spur
(3A)
LS12V 0V
Controller
Fan
12V D.C
SELV Supply
NL
LS
LS
N
L
2
1
3
Fig.2 Continuous boost with no trickle facility SELV models
Fig.3 Continuous trickle with boost facility via LS or internal pullcord, SELV
models
Fig.1 Continuous trickle with pullcord boost SELV models
~
N
L
1 Phase Supply
(220-240V 50Hz). FUSE
Switched
Fused Spur
(3A)
LS
12V 0V
Controller
Fan
12V D.C
SELV Supply
NL
LS
LS
N
L
LINK 2
1
3
~N
LS12V 0V
Controller
Fan
12V D.C
SELV Supply
NL
LS
LS
N
L
2
1
3
3A
3A
Fig.4 Removing the grille for wiring and setting the controls
Pull front panel as shown. Loosen screws – DO NOT REMOVE FROM GRILLE
(the screws are self-retaining)
Pull inner grille away from housing as shown.
DOWN
Mode/Set
UP
Open up the internal cover
to access the spirit level
bubble and terminals.
This product should not be disposed of with household waste. Please recycle where facilities exist.
Check with your local authority for recycling advice.
AIRTECH ENVIRONMENTAL SYSTEMS
STATHE ROAD, BURROWBRIDGE, SOMERSET, TA7 0RY
Tel : 0800 378 017
EU Authorised Representative: Airtech solutions Sigarenmaker 5 - 5521DJ Eersel Nederland.
authorisedrep@airtechsolutions.nl
495389 D 0323
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