Wolf COB - Filling the Heating System

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The displacement device may have slipped during
transport.
To ensure perfect combustion, check the
displacement device is correctly positioned before
commissioning the appliance.
- Unplug the central connector.
- Loosen the three 6 mm Allen screws on the burner ange
(do not unscrew them completely).
- Rotate the burner unit approx. 1 cm to the right
(clockwise).
- Lift the burner unit upwards out of the combustion
chamber lid and hang in place in the maintenance
position, as shown in the gure.
- Undo the wing screws on the combustion chamber lid.
- Lift off the combustion chamber lid and place to one side.
- Measure the distance between the upper edge of the top
displacement device and the upper end of the ridged prole,
then compare with the table below.
Displacement
device distance to
ridged prole (mm)
COB-15 COB-20 COB-29 COB-40
98-103 98-103 123-128 123-125
- Assembly is carried out in reverse order.
Fill the system and vent it properly to ensure
perfect boiler function.
Beforeconnectingtheboiler,ushtheheating
systemtoremoveresiduessuchaswelding
pearls,hemp,putty,etc.fromthepipework.
- Open the cap on the vent in the boiler by one revolution.
- Open all radiator valves.
- Fill the system via the return line at 2 bar (1.5 to 2.5 bar).
- With the entire heating system and boiler in a cold
condition, ll slowly via the inspection/ll & drain valve at
the return until 2 bar pressure is indicated.
- Check the entire system for water leaks.
- Start the boiler, set the heating water temperature to
position "2" (pump running, illuminated signal ring as
status indicator constantly green).
- Vent the pump; for this, briey open and then retighten the
air vent screw.
- Vent the heating circuit completely, switching the boiler
ON for 5 seconds and OFF for 5 seconds at the ON/OFF
switch, ve times in succession.
- When the system pressure drops below 1.5 bar, top up the
water.
NB
Air vent valve
Fillingtheheatingsystem
15.Fillingtheheatingsystem
Diagram: Venting the COB
Checkingthepositionofthedisplacementdevice
Diagram: View of COB displacement device
Displacement device
distance
Unplug the
central connector
Burner in the
maintenance position