Where ISO ePM2.5 (F7) filters are fitted, please ensure the flow rate of the fan is as expected. F7 filters cause
extra system resistance so it may be necessary to increase the fan speed to compensate.
COMMISSIONING MENU STRUCTURE
Display text
rot-rot
d-n / d-y
p-n / p-y
b01 - b02
t19 – t25
c05 – c20
F.G4 – F.F7
r-n / r-y
t26 – t35
Summertime cutoff 26-35°C
bst
c-n / c-y
unl / loc
cod
* This setting rotates the display only; the buttons retain their original function. For example; the mode button is on
the right when in normal rotation and on the left when the screen is rotated and looking at the fan so the display is
correctly orientated. ** Display: unl
Description: menu lock on or off. When locked a code is required to access the menu Options:
unl – unlocked Loc – Locked.
*** Display: cod
Description: Set the menu lock code. This is a 3 digit hexadecimal code, set between 0 - F.
Options: press up or down to start choosing the first digit then press mode to set and move to the next digit. Repeat
to set the other two digits. Default override code is 999.
For most installs the standard features allow for ample adjustability, however in some install situations the advanced
features will improve the unit's performance or acceptability.
Radon mode keeps the fan running even at high temperatures to prevent the build-up of dangerous radon gas in the
property. If this is not required it is recommended not to use this setting.
SPEED SETTINGS
The unit will run constantly at the set speed, with the following exceptions.
If the ambient inlet temperature exceeds the Summertime Cut-off temperature 27°C (default), the Unit automatically
switches to standby (no airflow). If Radon Mode in enabled, the Unit will continue to run beyond the normal threshold
temperatures.
Purge/Boost-Mode: Boost-mode is initiated when an LS signal is detected. The fan speed will then be set to
maximum until the LS signal is removed.
The speed settings on the Unit are fully adjustable between 19 L/s and 25 L/s via the manual speed setting
option. Alternatively there are 2 Pre-set speeds, the speed settings relate to the number of bedrooms with, for
example, setting b02 being for a two bedroom dwelling. For the approximate flow rates at each setting see table
below. The Unit must be set to provide adequate ventilation according to Part F of the building regulations.
Installation Option
Display rotation*
Ducted Yes/No
Preset Speed No/Yes
Number of Bedrooms 1-2
Flowrate 19-25 L/s
Heater setpoint 5-20°C
Filter fitted G4/F7
Radon mode No/Yes
Boost Overrun Time
Comfort Mode Yes/No
Lock feature On/Off**
Lock code***
Selections
rot-rot = Default
d-n = Default
p-n = No
b01/02 = Range
t19 – t25 L/s
c05-c20°C
G4 = Default
r-n = Default
t26 – t35 = Range
0, 1, 2, 4, 8 hr
c-n = No
unl = unlocked
Set between 0 - F
17
o
r-y
rot = Rotated 180
d-y = Yes
p-y = Yes
b01 = Default
c05 = Default
F7 = Optional
r-y = Yes
t27 = Default
0 = Default
c-y = Yes
Ioc = Locked