Page 18 RHC 8000 EN April 2019 D301207 Issue C
4.2.5 Electrical Isolator
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.
5. 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 Electrical 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 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.
5.2 Gas Connection
(Gas Service Connection of 3/4”or 11/4”for
8000 or 8000M units)
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
CAUTION: Never use a flame for
checking gas soundness.
5.3 Lighting The Air Heater
RHC 8000(M) air heaters are all fitted with
automatic spark ignition systems. When
adequate airflow for combustion is
proven by an air proving control and a
pre-purge period has elapsed, the integral
igniter and multi-functional gas control
operate. The ignition spark ignites the
gas creating the burner flame, which is
detected by a flame rod sensor. If a burner
flame is not detected, the ignition controller
proceeds to lockout and requires manually
resetting. Lockout is indicated by the red
warning light on the wiring panel inside the
heater.
CAUTION
Summary of Contents for Reznor RHC DJL 8000
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