29
INSTALLATION
isar - Installation and Servicing
nm8456
Piping
frame
Blue fibre washer
Compression
gas cock
(shown in the
open position)
GAS IN
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 43 or 'Servicing' for details of the pressure test point position.
34
GAS CONNECTION
The safety valve is located at the bottom RHS of the boiler.
The discharge pipe should be positioned so that the discharge of water or steam cannot create a hazard to the occupants
of the premises or damage the electrical components and wiring.
35
SAFETY VALVE DRAIN
INSTALLATION
203319-3.pmd 27/03/2008, 08:1529
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