Repair manual

5 / Repair Instructions

Drawing 25

~ Fan wheel with marking

Removing the burner motor (see Figures 3 and 4)

• Take off the hood.

• Unscrew the fan wheel in an anti-clockwise direction,

counter-restraining the motor shaft with screwdriver.

• If necessary, check the burner motor with the test unit for

burner head (see below).

• Pull out “Burner motor” cable section at the control unit,

slot “B”.

• Undo 3 fastening screws from the burner motor.

• Remove burner motor.

Figure 3

~ Electric motor

Ä Fixing screws

Å Motor shaft (threaded)

Figure 4

~ Figure 4

Ä Coupling

Please note!

When mounting the fan wheel, tighten with 1 Nm +0.5 Nm.

Checking functioning and rpm of the burner motor with

the test unit for burner head (see Diagram 25)

• Remove all connectors from the control unit.

• Connect test unit for burner head.

• Mark the fan wheel.

• Hold down the “Heizung EIN” [“Heating ON”] switch for 4

seconds ---> the HYDRONIC starts, the electric motor must

run for 180 seconds (delayed shutoff) --->

- If it does, measure the rpm with a contactless speed

measuring unit.

- If not, replace the electric motor.

Electric motor rpm

HYDRONIC 16 3800 ±350 rpm

HYDRONIC 24 4200 ±350 rpm

HYDRONIC 30 4800 ±350 rpm

HYDRONIC 35 5200 ±350 rpm

Ä Ä

Beware danger of injury!

• The fan wheel has sharp edges.

- Avoid contact with the fan wheel and, if necessary, wear

protective gloves.

Please note!

Please observe the operating instructions for the test unit

for burner head. Wait for the electric motor to run for 180

seconds.