0503RHC8RJLGBEN
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5.2 G
AS CONNECTION
(
gas service connection of 3/4”or 5/4”)
(for resp. 8000 & 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 L
IGHTING THE AIR HEATER
RHC 8000(M) RJL 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.
NOTE: If the first reset is not successful, wait 15
seconds before attempting reset
.
5.3.1 To turn the air heater "ON"
The following checks should be carried out before
attempting to light the air heater.
*Ensure that the gas supply to the air heater is turned ON;
*Ensure that the electrical supply to the air heater is
switched ON;
*If fitted ensure that a time switch is set to an ON period
*Set room thermostat to call for heat. e.g. to above room
ambient temperature (or follow the instructions of the air
handler). The burner will now light. The burners can be
seen through the viewing port.
*Adjust the room thermostat to the required operating
comfort temperature. The air heater will now start
automatically when the room thermostat calls for heat
NOTE: If the air heater will not start on initial start-up,
the ignition controller may be in lockout position and
require resetting. This may occur especially if the
appliance has been on stand-by for a prolonged period.
5.3.2 To turn the air heater "OFF" for short periods
Adjust the room thermostat to its lowest setting or 'OFF'.
The fan will continue to run to cool the heater and then
switch OFF automatically (or follow the instructions of the
air handler).
5.3.3 To turn the air heater "OFF" for long periods
Adjust the room thermostat to OFF or its lowest setting.
When the fan has stopped, turn OFF the gas supply and
then switch OFF the electricity supply to the air heater (or
follow the instructions of the air handler).
5.4 A
IR HEATER GAS PIPEWORK
The soundness of the air heater pipework has been
checked prior to leaving the factory. However during
installation, connections may have been loosened. Check
the soundness of the appliance pipework using a soapy
solution. If any leaks are found they must be rectified
immediately.
Caution: Never use a flame for testing for gas
soundness
5.5 A
DJUSTMENTS
Burner gas pressure adjustment
The gas pressure is set for the required heat input before
the appliance leaves the factory, normally provided the gas
supply to the air heater is in accordance with the supply
pressure described on the appliance data plate the
operating pressure will not require adjustment. To check the
pressure, the following procedure should be carried out:
*
Ascertain from section 1 of this document and the
appliance data plate the correct operating gas pressure for
the air heater;
* Turn the room thermostat control to its lowest setting (see
instructions of the air handler);
* Remove the screw from the outlet pressure test point of
the multi-functional control valve. Connect a manometer
to the test point;
* Adjust the room thermostat to call for heat e.g. above
room ambient temperature;
