INSTALLER
25
g
N - NK
boilers from size
5
to
10
must be installed
in dedicated boiler rooms.
The boiler room must have adequately sized vents, and
must comply with applicable laws and standards.
b
When installing the boiler, allow sufficient space
around it to access all safety and control devices
and to permit easy maintenance.
b
If the specific weight of the gas supply to the bur-
ner is greater than the specific weight of air, install
all electrical parts at least 500 mm above floor level.
a
Do not install the boiler outdoors. It is not designed
to work outdoors and is not fitted with the necessa-
ry automatic anti-frost systems to do so.
g
N
boilers are designed and made for use in central heating installations, but can also be used for domestic hot
water production if connected to suitable systems. Water fittings are as specified in the following table:
When installing these boilers in old systems or systems
requiring modernisation, always perform the following
checks:
- Make sure that the stack is able to withstand the tem-
perature of the combustion gases and that it has been
designed and made in compliance with applicable
standards. The stack must also be as straight as possi-
ble, sealed, insulated and not blocked or choked.
- Make sure that the electrical system has been installed
by a qualified electrician in compliance with applicable
standards.
- Make sure that the oil feed line and any oil storage
cylinder are made and installed in compliance with
applicable standards.
- Make sure that the expansion vessels are big enough to
contain the volume generated by thermal expansion.
- Make sure that flow rate, head and direction of flow of
the pumps are suitable and correct.
- Make sure that the circuit has been flushed out to remo-
ve all sludge and lime scale, and has been vented and
seal tested.
- Make sure that a suitable water treatment system is
installed if the quality of the supply/recirculation water
so demands. (See page 28.)
g
3 ÷ 8 N
g
9 - 10 N
DESCRIPTION
MODEL
g
N
3
4
5
6
7
8
9
10
A
225
mm
B
117
65
mm
C
530
815
mm
MI (CH flow)
1"1/4 F
1"1/2 F
Ø
RI (CH return)
1"1/4 F
1"1/2 F
Ø
MI
RI
MI
RI
A
A
B
C
A
B
A
C
PLACE OF INSTALLATION
INSTALLATION IN OLDER SYSTEMS AND SYSTEMS REQUIRING MODERNISATION
WATER CONNECTIONS
Rear view
Rear view
