T9901085-1-3 UK
Page 29 of 38
Fixing
screws
The factory set default schedule is suitable for most applications. However, the actual
frequency of cleaning required will depend on the environment. Two alternative filter
indicator schedules are available, and can be selected by changing the ‘jumper’ position
(marked 1, 2 or 3) on the Filter Indicator PCB.
Filter Indicator Schedule
Half
Period
Default
Period
Double
Period
Jumper position
Inlet grille vacuum interval
120 hrs
240 hrs
480 hrs
Filter service interval
480 hrs
960 hrs
1920 hrs
To access the Filter Indicator PCB to change jumper position:-
Switch off the electrical power to the Air Curtain. Remove the
plastic end caps, inlet grilles and bottom access panel, see
‘To gain access inside the Air Curtain’, Page 13.
Unfasten the two screws as shown in the picture at the left
hand end of the discharge grille.
Gently lower the left-hand end of the discharge grille,
supporting it from below. The Filter Indicator PCB is now
accessible to change the jumper position.
Once the filter indicator PCB ‘jumper’ has been re-positioned,
push the discharge grille back up into place and re-fasten the
screws. Replace bottom access panel, inlet grilles and plastic
end caps in reverse order.
Final Check of the Unit
Replace the bottom access panel, air inlet grilles (with filters) and plastic end caps (see
‘To gain access inside the Air Curtain’, Page 13).
Power-up both the Outdoor Unit and the Air Curtain and re-check the operation of the
unit.
1
2 3
1
2
3
1 2
3
Jumper
