5
3) LED Display with prism (Fig. 6) (dMEV,TP & HTP models)
For the first 15 minutes EVERY time the fan is powered off and on (via the isolator),
the display will cycle between displaying the actual airflow rate (l/s) being achieved*
and system pressure (Pa). They will cycle every 10-20 seconds, where the pressure
will flash, and the airflow rate will be on constantly. The day logger feature will only be
displayed once, after the first cycle of displaying the flow rate and system pressure.
*Airflow detection system must be enabled to display the calibrated flow rate.
4) Adjustable timer (TP model only)
The TP model incorporates an adjustable overrun timer. This adjusts the time the fan
will continue to run on boost after the LS connection has been deactivated. The timer
function is factory set at approx 15 minutes but can be adjusted between 1 & 30
minutes. This is also the run time period for the integral pullcord.
To REDUCE the operating time, use a small screwdriver to turn the adjuster Fig.5.
CLOCKWISE. To a minimum setting of 1 minutes.
To INCREASE the operating time, use a small screwdriver to turn the adjuster Fig.5.
ANTI-CLOCKWISE. To a maximum setting of 30 minutes.
5) Fixed timer (HTP model only)
The HTP model incorporates an optional fixed timer – set at 15 minutes. This is
the time the fan will continue to run on boost after the LS connection has been
deactivated. The integral pullcord timer is fixed at 15 minutes and cannot be
disabled.
To ENABLE the fixed overrun timer, link JP2 as shown in fig. 5.
To DISABLE the fixed overrun timer, remove the link in fig. 5.
6) Adjustable ambient response humidistat (HTP model only)
The HTP model incorporates an adjustable ambient response humidistat. The fan
will increase the extract rate if the humidity rises above the set point – adjustable
via the pot shown in fig. 5.
To LOWER the set-point use a small screwdriver to turn the adjuster Fig.5.
CLOCKWISE. This makes the controller MORE sensitive.
To RAISE the set-point use a small screwdriver to turn the adjuster Fig.5.
ANTICLOCKWISE. This makes the controller LESS sensitive.
Note: The ambient response feature will automatically boost the fan to 13l/s if
the humidity rises quickly irrespective of the set point and run on for the pre-
determined timeout period.
7) Pullcord (TP and HTP models only)
The integral pullcord activates the timer (see 4 and 5 above) and the fan will run at
13l/s for the set time period. If the integral pullcord is pulled for a second time
(once activated), the timer will be cancelled and the fan will revert back to the
trickle extract rate.
To remove the pullcord, cut the cord and leave the switch in place. There is no
need to switch the fan on/off beforehand.
