Table of Contents
Advertisement
Filling the system
Filling and flushing
the system
Extract from the safety datasheet:
Trade name:
Company:
Emergency information:
Chemical properties:
Particular safety information for
personnel and the environment:
After contact with eyes:
After contact with skin:
After ingestion:
Transport:
Water risk category:
The full safety data sheet is available from the "Download Centre" of the Wolf homepage.
Initial start-up
38
Filling the system / Safety datasheet /
Initial start-up
For flushing and filling the solar heating system, we recommend the use of a
fill & flush pump that runs for at least 30 to 60 minutes. This makes manual
venting superfluous. Also consult the manufacturer's instructions for the solar
pump assembly.
Do not fill the system or uncover the collectors in strong sunshine. There
is a risk of burns. Only use undiluted ANRO to fill the system. Never add
water or any other heat transfer medium. There is a risk of flocculation,
and frost and corrosion protection can no longer be guaranteed. This
may lead to a complete failure of the system.
ANRO heat transfer medium (ready-mixed, frost protection to -30 °C)
Wolf GmbH, Postfach 1380, D-84048 Mainburg; Tel: +49 (0)8751/74-0;
Fax: +49 (0)8751/741600 +49 (0)40 -209497-0 (weekdays 08:00 - 17:00 h)
1,2-Propylene glycol with corrosion inhibitors,
45.3 % by vol. mixed with 54.7 % by vol. potable water, dyed blue.
Not required
Flush with clear running water for 15 minutes whilst holding the
eyelids apart.
Wash with water and soap.
Flush mouth and drink plenty of water.
Not dangerous cargo in the sense of the transport regulations.
WGK1; little risk to water.
During commissioning the solar circuit is flushed, filled and pressurised. At this
stage the collector must not transfer any heat - it should be covered, unless
solar radiation levels are very low. Commissioning is generally carried out
using only ANRO.
Filling and flushing
If a filler pump is used for filling the system, ensure that air can escape at the
highest point/s. Metal manual air-vent valves are ideal for this purpose. In this
case, however, a second person will be required to close the air-vent valves
as soon as fluid begins to exit.
The solar filler and flushing pump from the Wolf accessories range has proven
reliable in practice. With the pump it is no longer necessary to bleed the system
at its highest point. The decisive factor is that the flow velocity in horizontal
and falling sections of the solar circuit is greater than 0.4 m/s, this will ensure
that the air bubbles are pulled along.
To prevent extensive foaming of the ANRO, we recommend that you start filling
the pipework slowly with a reduced flow rate and then gradually increase the
rate. Care should also be taken that when fluid flows back into the fill vessel,
any turbulence is kept as low as possible. The fluid level above the return or
flow connector should always be high enough so that the fluid surface in the
vessel is calm.
Take care with objects with high static head. A negative pressure may form at
high points owing to the falling water column beyond. This causes the boiling
point of the fluid to decrease strongly and even at a low temperature steam
may form, preventing the system from being filled correctly. Reducing the
drain rate at the BDF valve can help prevent this situation. Reduce the drain
flow rate until the required system operating pressure is constantly maintained
at the pressure gauge.
3062815_201508
Advertisement
Table of Contents
