Pump; Air Pressure Switch - Vaillant TURBOmax Pro 28 Instructions For Installation And Servicing

PARTS REPLACEMENT
Fig. E.11: Pump
Fig. E.12: Air pressure switch
52
picture shows a TURBOmax Plus boiler
1 2
5 4
7
6

Pump

Refer to the important information
and initial preparation on page 45.
Release central heating water
pressure.
Unclip the terminal box cover by
releasing the cover retaining clips
and lift to remove.
Unplug the pump wire (1) from the
electronic board.
Undo the three pump screws (3).
Pull pump forward to remove.
Fit new 'O' rings supplied to pump
connections.
3
Re-assemble in reverse order.

Air pressure switch

Refer to the important information
and initial preparation on page 45.
Remove clips (6) and lift out
pressure switch (7).
Disconnect electrical connections
(4).
Disconnect air tubes (5).
Re-assemble in reverse order.
Note: Air tubes should be
reconnected:
P1 (marked on air pressure
switch) to white tube.
P2 (marked on air pressure
switch) to blue tube.