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7. MAINTENANCE
SCHEDULE
SOLAR
- A
COMFORT
1.
Check the system pressure when cold against commissioned tolerances.
2.
Check the expansion vessel pressure against commissioned tolerances.
3.
Check the pH level of the heat transfer liquid. Tyfocor LS must be in the range 9 -10.5
4.
Check the refraction index. Tyfocor LS must be in the range 1.380 – 1.384
5.
Check using refractometer that heat transfer fluid is of sufficient concentration for -28°C
6.
Check Collector glazing is undamaged.
7.
Check Collector glazing is reasonably clean.
8.
Check, where visible, absorber paintwork or coating is sound.
9.
Check the roof fixings are firm and the roof covering satisfactory by visual inspection.
10.
Check electrical controls and temperature sensors are operating sensibly.
11.
Check the circulating pump is operating without due noise.
12.
Check pipework insulation is firmly in place.
13.
Check there are no condensation or damp spots, particularly around the pipework and fixings in
the roof space.
14.
Check all safety and information labels are in place.
15.
The antifreeze should be tested at least every five years (depending on the type chosen).
16.
Regular de-scaling may be required for the heat exchanger surfaces.
17.
If there is a significant drop in primary pressure or fluid level, suspect one or more of the following:-
1.
Overheating - fluid displacement via safety discharge
2.
Leak on system or poor design.
3.
Expansion vessel requires priming
N.B. For detailed fault finding see AST 100 Solar Controller Manual
32
M
NNUAL
AINTENANCE
S
CHEDULE
✓
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