Automatic Air Release; Automatic Bypass - Vaillant ECOmax VUW 236 EH Instructions For Installation And Servicing

•
Undo the 3 pump screws (3, fig.
82).
•
Pull pump forward to remove.
•
Remove back of control box by
undoing 2 screws (1, fig. 78).
•
Disconnect pump supply plug and
lift clear of board.
•
Fit new `0' rings (supplied with
pump) to connecting tubes.
•
Reassemble in reverse order.
•
Recommision boiler (see Section 5).
7.15 Replacement of automatic
air release (fig. 82)
•
Turn off boiler as in Section 7.1.1.
•
Release CH water pressure and
drain boiler as in Section 7.1.2.
•
Remove front casing as in Section
7.1.3.
•
Lower front control panel as in
Section 7.1.6.
•
Unscrew cap (4) of auto air release
and remove inner components.
•
Replace with new inner compo-
nents and reassemble in reverse
order.
•
Refill and repressurise the boiler
(see Section 5.4).
7.16 Replacement of automatic
bypass
•
Turn off boiler as in Section 7.1.1.
•
Release CH water pressure and
drain boiler as in Section 7.1.2.
•
Remove front casing as in Section
7.1.3.
•
Lower front control panel as in
Section 7.1.6.
•
Remove spring clip (2, fig. 83) by
lifting upwards.
fig. 82
fig. 83
49