24
m
CAUTION
– The boiler should be located observing the
required clearances, and provide safe, adequate
service access.
6.9
Plumbing connections
The plumbing connections have the following characteristics
and dimensions.
175
95
65 65 65 65
=
=
48
400
M
Sc
Sc
U
G
E
R
Fig. 16
Description
Murelle Advanced HE ErP
30
40
M - System flow
Ø 22 mm
R - System return
Ø 22 mm
U - Domestic hot water output
Ø 15 mm
E - Domestic hot water inlet
Ø 15 mm
G - Gas cock connection
Ø 15 mm
Sc - Condensate outlet
Ø 21.5 mm
m
CAUTION
A sealed system must only be filled by a competent
person (see section Method of filling a sealed
system page 29).
6.9.1 Plumbing accessories (optional)
To facilitate plumbing and gas connections to the systems, the
accessories as shown in the table below are available and are
to be ordered separately from the boiler.
DESCRIPTION
CODE
Stand off frame (25 mm)
8082212
Valve cover
8094530
NB:
kit instructions are supplied with the accessory itself or
are to be found on the packaging.
6.10 Condensate outlet/collection
To ensure safe disposal of the condensate produced by the
flue gases, reference should be made to BS6798:2009.
The boiler incorporates a condensate trap which has a seal of
75 mm, therefore no additional trap is required.
The condensate trap can be filled prior to the installation of
the flue by carefully pouring 1 litre of water into the exhaust
connection.
NOTE: All pipework must have a continuous fall from the
boiler and must be resistant to corrosion by condensate,
copper or steel is NOT suitable. It should be noted that the
connection of a condensate pipe to a drain may be subject to
local building control requirements (Dealing with Condensate
- see Appendix 1).
6.11 Gas supply
Murelle Advanced HE ErP
boilers leave the factory prearranged
for gas G20 (methane) and can also work with G31 (propane)
without the need for any type of mechanical conversion.Simply
select parameter “03” (see “Parameter setting and display"
page 32) and set the type of gas to be used.
If changing the type of gas to be used, carry out the entire
appliance “COMMISSIONING” phase (page 31).
The gas connection must be made using seamless steel or
copper tube.
Where the piping has to pass through walls, a suitable
insulating sleeve must be provided.
When sizing gas piping, from the meter to the boiler, take into
account both the volume flow rates (consumption) in m3/h
and the relative density of the gas in question.
The sections of the piping making up the system must be
such as to guarantee a supply of gas sufficient to cover the
maximum output available from the boiler, limiting pressure
loss between the gas meter and any apparatus being used to
not greater than 1.0 mbar for family II gases (natural gas).
An adhesive data badge is sited inside the front panel; it
contains all the technical data identifying the boiler and the
type of gas for which the boiler is arranged.
