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8.3 Cleaning
DANGER! Do not use a high-pressure water jet for cleaning. Do not direct a
high-pressure air jet at the cooling fan in the heat exchanger. Take care not
to damage seals, wiring, the heat exchanger channels and the cooling fan
during cleaning.
Important! Intermittent lamp cutouts are a sign of critical overheating with a
risk of damage to the luminaire. If the lamp cuts out intermittently, turn off
power to the luminaire immediately and follow the inspection and cleaning
procedures described below.
Periodic cleaning, especially of the heat exchanger, is critical in order to maintain
adequate cooling and satisfactory performance.
The intervals at which cleaning is required will vary depending on the amount of airborne
dust and other particles around the installation. Therefore, the temperature readings in the
display panel must be monitored and luminaires must be visually inspected for signs of
dirt and dust build-up frequently over the first few months of use. Once a pattern has been
established, a cleaning schedule can be drawn up.
If the heat exchanger becomes increasingly clogged with dirt and dust, the cooling fan will
run at increasing speed and the temperature readings in the display (or visible when MUM
is connected) will rise. If temperatures rise too high, the luminaire will show a warning in
its display. Finally, if the temperature inside the luminaire exceeds a safe level, a
thermostatic safety switch shuts down power to the lamp and reapplies power when the
temperature has fallen to within safe limits.
If intermittent lamp cutouts occur, stop using the luminaire immediately, inspect it, and
clean it if dirt and dust has built up in the heat exchanger. If the heat exchanger appears to
be clean, contact Martin Architectural for assistance.
8 . 3 . 1 C l e a n i n g t h e h e a t e x c h a n g e r
The heat exchanger cooling fan, vents and channels must be kept clean to allow free
airflow through the heat exchanger. Use compressed air at low pressure to clean the heat
exchanger. Do not spray water or dirt at the fan motor.
To clean the heat exchanger:
1. Cut lamp power, allow the luminaire to cool with fans running for 20 minutes, then
isolate the luminaire from AC power and lock out power.
2. Visually check the level of dirt and dust buildup through the heat exchanger vent at the
front of the luminaire and the fan grille:
- If the fan, vents and channels are perfectly clean, consider increasing intervals
between cleaning.
- If the fan, vents and channels have heavy dirt or dust deposits or are clogged,
proceed to point 3. below and reduce intervals between cleaning.
3. Remove the heat exchanger cowling and cooling fan cowling retaining screws and
lower the cowlings from the bottom of the luminaire for access to the heat exchanger
channels.
4. Blow loose dirt out of the heat exchanger with low-pressure compressed air, used in
combination with a soft brush if necessary. You can use a long, flat, thin object to
Cleaning
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