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 Some brands of evacuated tube collectors use polished metal reflectors under the
tubes. Clean these out, but be careful not to scratch the aluminum reflectors.
After cleaning, the glazing may still appear cloudy. This can be either condensation
or outgassing. Condensation is typically spread unevenly on the underside of the
glazing. It usually indicates a leak in the glazing gasket system or the collector
frame (Figure 6-l).
FIGURE 6-l
Condensation (top)
and Outgassing
(bottom)
MAINTENANCE
202
6.1 MAINTENANCE PROCEDURES
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