11
GENERAL
7 .2 Manual bleed valve (available as
an accessory)
The manual bleed valve is designed to bleed air quickly
from the system, and must be installed together with the
brazed unions on the collector outlet pipe at the highest
point in the circuit.
b
Make sure that you close the manual bleed valve after
all air has been bled from the circuit.
Refer to the instructions provided with the bleed valve for
details on how to install it.
b
The manual bleed valve is not necessary if an
automatic filling pump is available.
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 protection 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 transfer liquid.
7 .3
IDRA FI LE
solar storage cylinder
B
IDRA FI LE
solar storage cylinders are double coil
units designed for installation in domestic hot water
production systems heated by solar collectors. They are
available in 200 and 300 models.
The most important technical features of these solar
storage cylinders are:
- The cylinder and coils are specially designed
and shaped for optimum performance in terms of
stratification, heat exchange and replenishment times
- the double vitrified cylinder lining is bacteriologically
inert for maximum hygiene, reduced lime scale
deposits and easy cleaning
- CFC-free polyurethane insulation and an elegant
external casing reduce heat loss
- temperature sensor and power cables are all
internally routed
- a flange is provided for easy cleaning and
maintenance of the anti-corrosion magnesium anode.
