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L
NVx Range Users, Installation & Servicing Instructions Doc Ref M104 issue 1.0 Sep 2018.
building requirements. An existing service pipe must not
be used without prior consultation with the local gas
undertaking.
An existing meter should be checked, preferably by the
gas undertaking, to ensure that the meter is adequate
to deal with the total rate of gas supply required by all
connected equipment.
Installation pipes should be fitted in accordance with IGE/
UP/2. Pipe work from the meter to the air heater must be
of adequate size.
Do not use pipes of a smaller size than the inlet gas
connection of the heater.
The complete installation must be tested for soundness
as described in the above Code.
Only flue systems supplied through Powrmatic Ltd may
be used with LNVx units. Several configurations of flue
and combustion air ducts are available.
The flue must terminate in a freely exposed position and
be sited to prevent the products of combustion entering
any opening in a building in such concentration as to be
prejudicial to health or a nuisance.
Type B22 Installation.
Type C12 or C32 Installation
.
Type B flued installations
.
Where LNVx heaters are
installed within the heated
space (ie not in a plant room or an enclosure)
and having
a building design air change rate of greater than 0.5/h,
additional provision for ventilation is
not required.
If the building design air change rate is
less than
0.5/h,
additional provision for natural or mechanical ventilation
is required
.
These being:
• Natural Ventilation:
Grilles having a free area of at least 2cm² per kW of rated
heat input shall be provided at low level i.e. below the level
of the heater flue connection.
• Mechanical Ventilation:
Must ensure that the space air change rate is at least
0.5/h, must be of the ‘input’ type and interlocked to
ensure the heaters cannot work if the input system is not
working.
Type B flued installations
.
Where LNVx heaters are
installed in a plant room or
an enclosure (i.e. not within the heated space)
having
combustion air drawn directly from the room and
connected to a flue that evacuates the products of
combustion directly from the room additional provision
for natural or mechanical ventilation
is required.
Option 2:
Combustion Air Entry
(fitted with inlet grille)
Option 1:
Combustion Air Entry
(fitted with inlet grille)
Combustion
Air Socket