Xpelair Xcell 150 QV Installation And Operating Instructions Manual - page 17
17
8.3
QCO
2
CO
2
Sensor
The CO
2
sensor will only function in conjunction with the automatic 3-speed switch, refer to sections 7.3 and 7.4
for the relevant wiring diagrams and associated controllers that are compatible with the CO
2
sensor. With
jumper 10 selected on the PCB, the CO
2
sensor is active.
Minimum size of 3-core cable to be used:
Power supply – 1.5mm…
Switch – 0.5mm…
Note – use a spanner to tighten all cable glands
The MVHR only reacts to the CO
2
sensor when fan speed 2 is activated on the 3-speed switch. Fan speed 2 is
always displayed on the 3-speed switch, regardless of whether the CO
2
values are displayed as
(speed 1) or >1100 ppm (speed 3) on the CO
2
sensor. With this setting, the CO
2
sensor is always prioritised. As
soon as the Moisture Protection speed, speed 1 or speed 3 is manually activated on the 3-speed switch, the
CO
2
sensor is deactivated.
Switchpoints of the CO
2
sensor:
> 1.5 V MVHR switches from speed 2 to speed 1;
> 5.0 V MVHR switches from speed 1 to speed 2;
> 1000 ppm
> 7.5 V MVHR switches from speed 2 to speed 3;
> 1100 ppm
8.4
QHS humidistat sensor
Refer to sections 7.4 & 7.5 for the relevant wiring diagram.
Minimum size of 3-core cable to be used:
Power supply – 1.5mm…
Switch – 0.5mm…
Note – use a spanner to tighten all cable glands
This product is designed to measure humidity and temperature in indoor applications.
It uses a capacitive sensor element for the humidity measurement. The humidistat housing can be fixed directly
on the wall or flush mounted.
Note:
When using humidistats in conjunction with the 3-speed switch a maximum of 4 humidistats can be connected.
When using humidistats in conjunction with the 3-speed switch and a CO
2
sensor a maximum of 3 humidistats
can be connected.