Page 5
Commissioning
1.
The commissioning must only be carried
out by a suitably qualified person.
2.
Prior to starting the commissioning pro-
cedure, ensure that the ductwork con-
nections and airflow directions match
one of the options A or B, shown on
page 3. Check that the drain connection
is on the correct side.
3.
Before making any adjustments, ensure
that the air valves or grilles are fully open.
4.
Motor speed and timer settings are ad-
justed on the control board, which is lo-
cated behind the access panel Once
removed, there is access to potentiome
ters and jumper switches for use during
the commissioning process. (See dia
gram on Page 8)
WARNINg : With the control board panel
removed, 230 volt live connections are
accessible.
Airflow adjustment for Right-Hand Drainage
The supply and extract motors are adjusted separately for both the normal (trickle) speed and boost speed.
The set-up procedure is as follows :-
1. For right-hand drainage as shown on Page 5, ensure that the jumper switch JP4 (see diagram below)
is in
Position A
Normal (trickle) speed (r/h drainage)
2. Before making any adjustments, switch on the unit at trickle speed.
WARNINg : 230 volt, live mains are
present on the circuit board.
Move the speed adjust jumper switch JP5, to position A, as shown in the
diagram. A green light will appear on the circuit board.
3. With the boost switch OFF (bathroom light switch off), measure the airflow rate at the extract valve and
compare this to the design value. If there is a difference, adjust the potentiometer MIN-MOT2 , on the con-
trol board and re-check the airflow rate. If the value is slightly higher than that required, final adjustment
can be made at the air valve.
4. Set the position of the potentiometer MIN-MOT1 to the same as MIN-MOT2.
5. Measure the airflow at the supply valve. This should be the same or slightly lower than the extract rate
*
.
If higher, reduce the airflow by adjusting MIN-MOT1. Final minor adjustments can be made at the air valve.
*
unless a different supply value has been specified.
Boost speed (r/h drainage)
6. Switch on the boost (light switch ON).
7. Measure the airflow rate at the extract valve and compare this to the design value. If there is a difference,
adjust the potentiometer MAX-MOT2.
8. Re-check the airflow rate and make further adjustments at MAX-MOT2 until correct.
Do not re-adjust the
air valve.
9. Set the position of the potentiometer MAX-MOT1 to the same as MAX-MOT2.
10. Measure the airflow at the supply valve. This should be the same or slightly lower than the extract rate.
*
If higher, reduce the airflow by adjusting MAX-MOT1 until correct.
Do not re-adjust the air valve
.
*
unless a different supply value has been specified.
11. Return the speed adjust jumper switch JP5, to position B (green light goes out)
