25
INSTALLATION
isar + programmer -
Installation and Servicing
nm84
5
6
Piping
frame
Blue fibre washer
Compression
gas coc
k
(
shown in the
open position
)
GAS IN
D.H.W. Inlet
D.H.W. Outlet
nm84
55
1
5
mm copper pipe
1
5
mm copper pipe
Regulator / Filter
'O' Ring
Piping frame
Isolating valve
(
shown in the
open position
)
Compression
gas coc
k
Outlet
connector
Retaining
screw
Cross bar
IMPORTANT.
The gas service cock is sealed
with a non-metallic blue fibre washer so must
not be overheated when making capillary
connections.
Refer to Frame 2 for details of the position of
the gas connection.
N.B.
The principle of the 1:1 gas valve
ensures that the
isar HE
range is able to
deliver it’s full output at inlet pressures
down to 14mb. However if dynamic
pressures below 20mb are experienced
ensure this is adequate for
ALL
other gas
appliances in the property.
A boiler gas supply pipe length of 20m and
not less than 15mm O.D. can be connected
to the boiler via the gas service cock union.
Ensure that the gas supply pipe does not
foul the boiler casing.
Refer to Frame 38 or 'Servicing' for details of
the pressure test point position.
29 GAS CONNECTION
28 WATER CONNECTIONS - DHW
Note.
The DHW inlet
isolating valve incorporates
a flow regulator / filter. It should
be inspected to ensure no blockage
is evident.
1.
To remove, turn off the valve, undo the
retaining screw and pull out the filter
by grasping the crossbar with pliers.
2.
Reassemble in reverse order,
inserting in the direction of the arrow.
INST
ALLA
TION
202851-1new.pmd
17/11/2006, 07:40
25