Potterton Promax 15 HE Installation And Servicing Instructions page 31

Electrical Box
Cover
Fig. 48
Fig. 49
Control Board
Fig. 50
Ignition Board
Drip Tray
Securing Screw
Electrical Box Mounting Plate
Electrical Box
Supplied By www.heating spares.co Tel. 0161 620 6677
Securing Screw
Transformer
Securing Screw
Fig. 51
13.0 Changing Components
The control and ignition boards can be
accessed on the removal of the main
electrical box cover.
1. Remove the two screws securing the main
electrical box cover (Fig. 48).
13.4 Control Board
(Fig. 49)
1. Slide out the control board (right hand side)
and disconnect the electrical connections noting
their positions.
NOTE: Check the original board for the
presence of input jumpers - see section 8.8.
Set the new board as the original.
2. Fit the new control board and reassemble in
reverse order.
13.5 Ignition Board
(Fig. 50)
1. Remove the control board, (13.4) and slide out
the ignition board (left hand side) and disconnect
the electrical connections noting their positions.
2. Fit the new ignition board and reassemble in
reverse order.
13.6 Transformer
(Fig. 51)
1. After the removal of the control and ignition
boards the transformer can be accessed. Loosen
the two electrical box mounting plate securing
screws, remove the front drip tray securing screw
and lift the assembly to clear the keyhole slots.
2. The transformer is mounted on the rear of the
electrical box mounting plate.
3. Remove the two transformer mounting screws
and remove the transformer.
4. Fit the new transformer and reassemble in
reverse order.
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