Light Level Sensor - Xpelair XHR150PC Installation Instructions Manual

Light Level Sensor

A Light Level Sensor is included to prevent the fan from switching automatically to boost at night-time. This is a useful
feature particularly if the Heat Recovery Ventilator is installed in a bedroom or bed-sit accommodation, ensuring noise
is kept to a minimum.
The sensor is factory set in the OFF position as this is preferred for most installations. This means that the automatic
boost feature will operate if the humidity rises during the hours of darkness. To activate the Light Sensing feature, (boost
inhibited during darkness) turn the adjuster fully anti-clockwise, shown on page 2.
This should be an approximate setting for most installations depending on the location of the remote
transformer/humidity assembly in the room.
Fine tuning may be required for precise operation:-
Clockwise allows boost to operate during darkness
Anti-clockwise prevents boost operating during darkness
A simple test for the correct setting is to trigger the boost feature via the humidity sensor in a darkened room. When
switching the light on or off, the boost speed should cut in and out accordingly.
Cleaning
1. Before cleaning isolate the Sensor completely from the mains electrical supply.
2. Wipe the cover carefully with a damp cloth.
3. Dry throughly with a soft cloth
Do not immerse Sensor in water or other liquids.
GDA Applied Energy Limited Customer Service Department (UK only)
N
Never use strong solvents to clean the Sensor.
N
A part from cleaning, no other maintenance is required.
If required, a cleaning service is available from
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