Alde 1900 811 Mode D'emploi page 3

Fig.1
Switch 1
Switch 2
Suction hose max. 20 feet long
Water/glycol mixture
Heat transfer fluid (HTF)
HEAT TRANSFER FLUID (HTF)
If replacing the fluid, contact Alde Corp about product and purchasing information.
If using concentrated antifreeze it should be mixed 50:50 with clean water. The clean water should never exceed
200 mg/L hardness. Alde recommend using deionised water.
NB: The vessels which is used when refilling or changing the heat transfer fluid (HTF) must be absolutely
clean and the pipes in the heating system must be free from contamination, to prevent bacterial growth
and corrosion in the system.
Valve
Heating system
Valve in filling position
Valve in cycling position
Expansion tank
Fig.C/Abb.C
Valve in syphon position
3