White Knight BG 43A, Installation And Service Instructions Manual

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6. OPERATIONAL CHECK
6.1 Remove the pressure test point screw from the gas
tee connection at the back of the dryer and connect
a gas pressure gauge.
6.2 Check that the dryer timer is in the 'off' position, and
that the heat switch is set to 'high'.
Remove anything from inside the drum, check that
the lint filter is fitted, shut the dryer door.
6.3 Turn on the gas, push the electric plug into the socket
and switch on the electricity supply.
6.4 Turn the timer clockwise past the dotted line marking
the cool-down period to a setting of at least 30 mins.
Check for ignition. If the gas fails to remain lit then
repeatedly turn the timer on and off (or open and
close the door) for periods of at least 30 seconds
until the air is removed from the system and burning
is continuous. Note that gas is not lit when the drum
is turning anti-clockwise.
6.5 With the gas burning ensure that the pressure is as
detailed in the Technical Data. Turn off and replace
the pressure test point screw. Check for soundness.
6.6 Switch on again and re-start so that the gas is
burning.Disconnect the flexible gas hose and check
that the solenoids can be heard to close. After 30
seconds turn on the gas and check that there is no
re-ignition. Switch the machine off and on again and
check for reignition.
6.7 Check that the operation of the machine does not
cause spillage of products of combustion from any
open flued gas appliance in the same room, or from
appliances in adjoining rooms, e.g. a gas fire or
central heating boiler.
6.8 In the event of an electrical fault after installation of
the appliance, preliminary electrical system checks
must be carried out (i.e. earth continuity, polarity and
resistance to earth).
6.9 IMPORTANT INFORMATION RE-FUNCTIONING
OF THE FULL SEQUENCE FLAME CONTROL
BOX.
THE FULL SEQUENCE FLAME CONTROL BOX
ON THIS APPLIANCE REQUIRES A 6 SECOND
RE-SET PERIOD FOLLOWING EACH
INTERRUPTION OF INPUT VOLTAGE.
6 SECONDS DELAY IS REQUIRED BETWEEN
EACH ATTEMPT TO RESTART THE APPLIANCE
FOLLOWING SWITCHING IT OFF, OR AFTER
OPENING THE DOOR.
7 AIRFLOW
It is most important that airflow to the plinth is not
restricted.
8 MAINTENANCE
It is recommended that the appliance is serviced
annually by a person competent to service gas fired
tumble dryers.
9 STACKING
Instructions for stacking, if required, are supplied
with the stacking kit.
PROGRAMME
Clockwise rotation of the control knob closes switch
contacts within the timer to: a) energise the drive motor,
and b) energise the full sequence flame controller.
The timer switch controlling the drive motor and the timer
motor, remains closed until the timer motor mechanism
returns the control knob to the '0' position. The timer
switch controlling the full sequence flame controller
opens 12 minutes earlier to provide a cool-down period.
The full sequence flame controller opens the tandem
solenoid gas valves after a delay time of about 8 seconds
and operates the pulsing spark ignition. If the flame is not
detected by the flame failure electrode within 10 seconds
then the valves are closed. The system must then be re-
set by switching the machine off and re-starting.
The heat selector switch provides options for either 60°C,
or 50°C, exhaust thermostat control. This results in the
burner cycling on and off giving Ionger than anticipated
drying times. Drying times vary depending on the weight
and size of the articles, type of fabric, dampness etc.
These thermostats turn off the heating towards the end of
the chosen cycle and so avoid waste of energy. The
lower temperature thermostat prevents delicate fabrics
from getting too hot with possible risk of damage.
An inlet thermostat is fitted in the ducting at the back of
the dryer. It may also operate under certain other
conditions of restriction of the air-flow, for example, an
overloaded drum or blocked lint filter. This thermostat
switches off the flame controller. This will result in the
burner cycling on and off giving longer than anticipated
drying times. Drying times vary depending on the weight
and size of the articles, type of fabric, dampness etc.
Should the thermostat fail there is an inlet cut-out
connected in circuit with the gas valves. After operation,
the cut-out must be re-set to restore heating but a service
call may be required to correct the initial fault.
The conditions of failure of the air flow, blow-back, or of
gas interruption are detected by the flame failure
electrode and the system is shut-down.
Both drum rotation and heater control are switched off
when the door is opened and switched on when the door
is reclosed.
For programme times see chart on dryer control panel.
Note: Do not allow fluff to accumulate around the dryer.