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4.0 INSTALLATION
4.1 U
NPACKING AND PREPARATION
Prior to dispatch, the air heater was operated and tested at
the factory.
Check the shipping label and data plate to ensure the
specification of gas and electrical supplies are compatible.
Read this document and become familiar with the
installation requirements and the appliance before
commencing installation.
4.2 E
LECTRICAL CONNECTIONS
The electrical installation may only be carried out by
appropriately qualified persons observing the rules in force.
All electrical connections should be made in the heater
control compartment. Screw type terminals are provided.
Connections should be in accordance with the terminal
markings and the wiring diagram affixed to the air heater or
included with this document.
DANGER: THIS APPLIANCE MUST BE EARTHED
The minimum external controls required for the air heater
are a room thermostat.
It is essential the main input line
and neutral to terminals L and N remains live at all
times even when the appliance is
switched off this is to
ensure correct operation of the unit
An indicator light and burner-reset button are fitted inside
the appliance. To add a remote reset button, make
connections to the terminals in the electric box as indicated
on the wiring diagram.
IMPORTANT: If the reset button requires activating for
any reason the cause should be identified before
resetting. After resetting stay with the appliance for
long enough to ensure that lockout does not reoccur
(suggest 5 minutes).
4.3 R
OOM THERMOSTAT SITING
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 siting 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.
5.0 COMMISSIONING & TESTING
Appropriately qualified persons may only carry out the
commissioning and testing.
This section should be read and fully understood before
commencing commissioning and testing.
5.1 E
LECTRICAL CHECK
After completion of the installation and before switching on
the electrical supply to the appliance, a qualified electrician
must carry out a preliminary check. The following must be
checked:
* Check to ensure that electrical cables/wiring do not touch
the hot combustion collector box and fix them on the gas
pipe
* 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
with 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.
