Installing The Flue System; Mounting The Boiler - Vaillant TURBOmax VUW 242 E Instructions For Installation And Servicing

4.4 Installing the flue system

At this stage install the flue system
(refer to separate installation
instructions supplied).

4.5 Mounting the boiler

4.5.1 Preparation
Remove the boiler from the carton.
Lay the boiler on the floor and
remove the white boiler bottom cover
by removing two screws (l, fig. 51)
and slackening two screws (2, fig.
51). Do not remove boiler side
panels. Remove the two plastic sea-
ling caps from the domestic water
connections.
Fit the pre-assembled cold water inlet
and hot water outlet pipes with
straddle bracket (1,2,3, fig. 15) to
water connections on boiler (4, fig.
15) using washers provided.
4.5.2 Fitting the boiler (fig. 13)
Lift the boiler up to the wall so that it is
slightly above the hanging bracket.
Note: Lift the boiler from under the
front edge of the side panels.
Do not lift the boiler by the control
box. Do not attempt to lift the boiler
without the side panels or side
casing fitted.
Lower the boiler slowly onto the
hanging bracket so that the cross
member at the top rear of the boiler
fully engages into the hanging
bracket.
4.5.3 Pipework connections (fig. 14)
Figure 14 shows the central heating,
domestic hot water, mains cold water,
gas and pressure relief valve
connections.
4.5.3.1 Central heating flow and
return
Before connecting the heating circuit
to the appliance, all pipework and
radiators must be thoroughly flushed
to remove any installation debris.
Connect the flow and return pipes to
the central heating service valves (8)
and (9) on the appliance using the
22mm compression connections.
4.5.3.1.1 Top pipework connection
If it is desired to run heating and
water pipework to above the boiler,
the purpose provided voids in the left
and right sides of the boiler casing
may be used (see fig. 16).
16
Supplied By www.heating spares.co Tel. 0161 620 6677
Note: To allow fitting of the bottom
boiler cover, the left hand tab (2, fig.
16) should be folded upwards where
pipes are fitted in the left hand void.
Where pipes are installed in these
voids, a method of disconnection e.g.
a compression connector (1, fig. 16)
must be provided to allow easy
removal of the boiler from the wall, if
required.
4.5.3.2 Cold mains water inlet and
hot water outlet (fig. 14)
Flush out all foreign matter from the
mains supply pipe before connecting
to the boiler.
Connect the mains water supply (3)
and hot water outlet pipes (4) to the
15 mm compression connections.
Note: The boiler has a maximum
domestic water working pressure of
10 Bar. If the cold mains supply
pressure exceeds 10 Bar, a pressure
reducing valve must be fitted to the
cold water inlet.
4.5.3.3 Pressure relief valve discharge
The appliance contains the pressure
relief valve required for a sealed
system (5). Connect a discharge pipe
not less than 15 mm diameter to the
outlet of this valve.
This discharge pipework should be as
short as possible and installed with a
continuous fall away from the boiler.
The pipe should terminate in a position
which ensures that any discharge of
water or steam from the valve cannot
create a hazard to persons in or
about the premises, or cause damage
to any electrical components or
external wiring, and the point of
discharge should be clearly visible.
The discharge must not terminate
above a window, an entrance or any
type of public access. The installer
must consider that the pipe could
discharge boiling water.
fig. 13
fig. 14
fig. 15
fig. 16