Alde Compact 3020 PS Gebrauchsanweisung Seite 42

8.3 Glycol fluid
WARNING Poisoning
Be sure to thoroughly clean up any puddles of leaked glycol or glycol mixture. Rinse the area with
water and wipe up the excess to prevent accidental ingestion by children or pets.
CAUTION
The heating system is delivered with glycol mixture. If the fluid level is too low the system must be
filled up to the right level before the heating system is used. The warranty may be voided and the
heating system may be damaged when starting up with too little or no glycol mixture.
NOTICE
Do not mix different types of glycol, this can lead to coagulation of the glycol mixture.
The heating system must be filled with a fluid mixture consisting of distilled water and glycol. Use
preferably ready mixed glycol of high quality (with inhibitors) intended for use in aluminium heating
systems. When using concentrated glycol the mixture shall consist of 60% distilled water, or water free
from salts, and 40% glycol. Using of tap water may cause corrosion and affects the warranty.
If the heating system is exposed to lower temperatures than -25 °C the glycol content has to be
increased, however not exceeding 50%. The glycol mixture should be changed every two years, since
properties such as corrosion protection deteriorate. If Alde Premium Antifreeze is used, the changing
interval can be extended to max. 5 years under normal operating conditions.
NOTICE
If the glycol mixture is not change in the correct interval this can result in frost damage, corrosion,
bacterial growth and/or overheating.
Filling the heating system with glycol fluid
The glycol content should be checked at the expansion vessel using a glycol tester before topping up
with new liquid, to ensure that the concentration of glycol is not to high. If the fluid level has dropped
for reasons other than evaporation, check all joints, rubber
hoses, drain cocks and bleeder screws for leakage.
The glycol system is filled manually via the expansion
vessel. When filling manually, pour the glycol mixture slowly
into the expansion vessel. The level should be approx. 1
cm over the min-line (fig. 15) in a cold heating system.
Bleed both zones in the system after filling, top up further if
the glycol level has dropped during bleeding. At newly filled
heating system, bleed at regular intervals.
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figure 15. Expansion vessel
Fluid level in
cold system