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4.6 Room thermostat location
Do not attempt to control more than 1 air heater
from a room thermostat or control panel unless a
properly wired relay is fitted. Follow instructions
supplied with such panels.
The location of the room thermostat is important. It
should not be fitted on an outside wall. Avoid
location in draughty areas or where it may be
influenced by heat
sources e.g. the sun, process plant, etc. The
thermostat or temperature sensor should be
mounted on a vibration free surface and mounted
about 1,5 meters above floor level. Follow the
thermostat manufacturers fitting instructions. The
thermostat must be suitable for switching 230 volts.
AIR DISTRIBUTION
LCSA-4 air heaters are fitted with adjustable
horizontal louvers over the range 0 - 45 degrees
from the horizontal so as to be able to direct the
airflow downwards.
DO NOT ADJUST THE LOUVRES BEYOND THEIR
STOPS
.
COMMISIONING & TESTING
The commissioning and testing may only be carried
out by appropriately qualified persons.
This section should be read and fully understood
before commencing commissioning and testing.
6.1 Electrical check
After completion of the installation and before
switching on the electrical supply to the appliance, a
preliminary check must be carried out by a qualified
electrician. The following must be checked:
*
Ensure that all cables & installer’s wiring are
fixed to the gas pipe & that they do not touch
the combustion collector box
* Check that all wiring is connected in
accordance with the appliance circuit diagram;
*
Ascertain that the correct fuse value and cable
size has been provided;
*
Check to ensure that the appliance is earthed
by conducting an earth continuity test. Connect
a test meter, one lead to the appliance earth
terminal and the other to the mains incoming
earth point at the electrical isolator. A
resistance reading of 1,0 ohm or less must be
indicated. If a higher reading is obtained, check
all cable connections to ensure adequate
security and cleanliness. If problem still exists ,
it may be necessary to consult the electricity
supply undertaking;
*
Carry out a polarity test. Connect one lead of a
suitable AC voltmeter to earth and connect the
other lead to the live supply terminal (L) at the
air heater. Switch ON the power to the air
heater and check for correct voltage.
The same result should be obtained by
connecting the test leads between live and
neutral.
Connect the voltmeter test leads to N and E. A
reading of 0V should be obtained. If these
tests do not conform to the above, there is a
fault which must be rectified before proceeding
further with the commissioning;
*
Check that a suitable thermostat or control
panel has been fitted;
*
Ensure that an electrical isolator with two pole
separation with a minimum air break between
poles of 3,0 mm has been fitted adjacent to the
air heater.
6.2 Gas connection
Only persons formally qualified to work on gas
fired apparatus may carry out commissioning
and testing.
The whole of the gas service installation including
the
meter must be inspected, tested for soundness and
purged in accordance with appropriate requirements
by a qualified person.
Never use a flame for checking gas
soundness.
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