10
H
H
Pressure at boiler
up to 15 m
3 bar
15 - 20 m
3,5 bar
20 - 25 m
4 bar
25 - 30 m
4,5 bar
General rule: p [bar] = 1.5 + H [m] / 10
Checks
On completion of the installation, perform the checks listed in the table below.
CHECKS
Collector circuit
Cold circuit pressure:____bar (see table
above)
Collector circuit seal test
Safety valve check
Anti-freeze checked to - ___ °C
pH of heat transfer fluid = ____
Collector circuit bled
Flow rate of 30 l/h per m
2
checked
Non-return valve functioning
Solar collectors
Visual check of collectors
Collectors cleaned if necessary
Visual check of collector fixing points
Visual check of roof impermeability
Visual check of insulation/lagging
Maintenance
Service the system and perform the checks listed in the tables below at least once every two years.
MAINTENANCE
Collector circuit
Cold circuit pressure:____bar (see table
above)
Collector circuit seal test
Safety valve check
Anti-freeze checked to - ___ °C
pH of heat transfer fluid = ____
Collector circuit bled
Flow rate of 30 l/h per m
2
checked
Non-return valve functioning
Solar collectors
Visual check of collectors
Collectors cleaned if necessary
Visual check of collector fixing points
Visual check of roof impermeability
Visual check of insulation/lagging
Checking the heat transfer liquid
Check the anti-freeze effect and the pH level of the heat transfer liquid every 2 years.
- Use an instrument like a refractometer or densimeter to check the anti-freeze effect (which must have a nominal pro-
tection value of approx. -30°C). If the protection threshold is higher than -26°C, replace the mix, or add anti-freeze as
required.
- Use litmus paper to check the pH (nominal value approx. 7.5). If the measured value is below 7, change the heat trans-
fer liquid.
Summary of Contents for CFO-25S
Page 1: ...SOLAR COLLECTOR CFO 25S INSTALLATION MANUAL ...
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