Burstner I 2012 - Bleeding the Heating System; Checking the Fluid Level; Topping up Heating Fluid

218 I-Modell - 11/12 - Ausgabe 09/11 - 2096165 - BUE-0056-05EN
Maintenance
12
12.6.1 Checking the fluid level
 Switch off the hot-water heater and allow it to cool down.
 Check if the fluid level is between the marks "MIN" (Fig. 250,3) and "MAX"
(Fig. 250,2) on the compensator reservoir (Fig. 250).
12.6.2 Topping up heating fluid
 Position the vehicle horizontally. This prevents the formation of bubbles.
 Switch off the hot-water heater and allow it to cool down.
 Unscrew or pull off the panel.
 Open the rotary lid (Fig. 250,1) on the compensator reservoir.
 Remove cover.
 Check anti-freeze with an anti-freeze hydrometer. The frost protection con-
tent must be 40 % or correspond to a frost protection of -25 °C.
 Fill water frost protection mixture slowly into the compensator reservoir.
12.6.3 Bleeding the heating system
The bleeding valves are built in nearby the radiators.
For position of the bleeding valves, see also table "Position of the bleeding
valves".
Fig. 250 Compensator reservoir hot-
water heater
Z The optimum fluid level is reached when the fluid in the compensator res-
ervoir is 1 cm above the "MIN" mark when it is cooled down.
Fig. 251 Bleeding valve of hot-water
heater