LCSC-3E--EN
21/40
1
2
3.4 Air supply
Figure 2c: Combustion air and flue pipe sockets, Type B
It is important to ensure that
there is an adequate air supply
at all times for both
combustion and heating
requirements. Modern
constructions involve the
greater use of insulation,
improved vapor barriers, and
weather proofing. This practice
means that buildings are
sealed much tighter than in the
past.
1 Flue pipe outlet collar
2 combustion air inlet opening
The combustion air supply for a power vented
gas fired air heater (Type B installation) can
be affected by lack of air supply. Natural
infiltration may not be adequate. Use of extract
fans aggravates this situation. It is important
to ensure that there is an adequate air supply
at all times. Reliance on doors and windows is
not allowed. Always ensure that an adequate
inlet for fresh air for combustion is provided
sized to suit the total installation of any
combustion apparatus.
Fit an access guard to the combustion air inlet
on the back of the heater and take appropriate
action to ensure that it remains unblocked.
See figure 2c.
WARNING: This model air heater is
installed as a type B application and is
designed to take air for combustion
from the space in which it is installed.
Do not restrict the combustion air
intake.
3.5 Air distribution
Follow recommended practice for building air
distribution.
The following notes are of particular
importance:
"Where free blowing air heaters are installed it
must be taken into account that heated air is
buoyant when it leaves the appliance, therefore, air
patterns within the space being heated will modify
the air throw pattern achieved.
In
building
having low heat loss where single heaters are required to
cover a large floor area and in buildings with high ceiling
heights, air re-circulation fans e.g. Maximizors may be
fitted to ensure even heat distribution and minimize
stratification. Care should be taken to avoid impeding air
flow with storage racking, partitions, etc."
3.6 Electrical supply
Wiring external to the air heater must be
carried out in accordance with the rules if
force and by appropriately qualified persons.
A constant 230 Volt 50 Hertz single phase
fused electricity supply with neutral link is
required. All heaters and controls must be
earthed. A lockable isolator with contact
separation of at least 3.0 mm on all poles
should be installed adjacent to the appliance
and within reach of any person working on the
heater.
When a number of heaters are to be
connected as part of a single installation each
heater must be provided with a separate
isolator.
The electrical connection to the air heater is at
the back of the appliance. The final connection
must be made in the terminals provided in the
control compartment.
Follow the wiring diagram provided with the air
heater.
Electrical supply cable conductor size should
be 1.5 mm. Fit the cord grip supplied with the
heater. The length of conductors between the
cord grip and the terminals must be such that
in the event that the cable becomes taut the
line conductors do so before the earth
conductor.
3.7 Gas supply
LCSC-3E air heaters are designed to operate
on either natural gas (G20) or propane gas
(G31). Refer to the specifications in section 2
of this document and to the data plate for
details of supply pressures.
The gas meter and gas service must be
checked by the supply undertaking to ensure
that they are adequate to deal with the total
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