HTP FP-40SC - Manual (Page 29)

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A. CLEANING
Regular rain should keep the collectors clean. However, if the collectors are particularly dirty, wash with a
soft cloth and warm, soapy water or glass cleaning solution, ONLY if the collector is located in a position
which DOES NOT require climbing onto the roof or use of a step ladder. If the collectors are not easily
and safely accessible, high pressure water spray is also effective.
If cleaning is required and the above outlined methods are not suitable, the company that supplied and
installed the solar collector should be contacted.
B. INSULATION
The plumbing pipes running to and from the collector should be heavily insulated. This insulation foam
should be checked periodically (at least once every 3 years) for damage. For any insulation exposed to
sunlight, ensure protective cover/wrap/foil is in good condition. Replace as required.
Draining the collector must be done with caution, as released water may be scalding hot. Take care when
opening the drain valve. Failure to do so could result in property damage or serious injury.
C. OTHER COMPONENTS
Other parts of the system, such as the pump and storage tank, should be serviced/inspected according to
the manufacturer’s maintenance guidelines.
D. STAGNATION
Drain back systems: These systems may be stagnated.
Pressure glycol systems: If left unattended for a significant length of time (greater than 14 days) such
as during a vacation, the system will need a heat dump, a cover for the collector array, or even drained to
prevent stagnation damage. Many solar controllers have a vacation mode that allows for dumping the
daily collected heat each night. See controller instructions.
PART 9 – TROUBLESHOOTING
Inspection items with an (H) in front may be completed by the homeowner, but only if investigation is
clearly SAFE and EASY. Any information obtained during an investigation can then be relayed to the
APPROXIMATE TIME / TEMPERATURE
RELATIONSHIPS IN SCALDS
120
o
F More than 5 minutes
125
o
F 1 ½ to 2 minutes
130
o
F About 30 seconds
135
o
F About 10 seconds
140
o
F Less than 5 seconds
145
o
F Less than 3 seconds
150
o
F About 1 ½ seconds
155
o
F About 1 second