Rangemaster Professional 90 Gas FSD User Manual page 28

After completing the gas connection, check the cooker
is gas sound with a pressure test.
Pressure testing
The gas pressure can be measured at one of the
hotplate burner jets (NOT a Wok burner). Make sure
that the cooker is not connected to the electricity supply.
Lift off a burner head. Fit the pressure gauge to the
jet. Turn on one of the other burners and light it with
a match. Turn on the control for the hotplate burner to
which the pressure gauge is fitted. Press in the knob to
allow the gas through and register the pressure on the
gauge.
For Natural Gas cookers the pressure should be
20mbar.
For LP Gas cookers the pressure should be 29mbar
for Butane
37mbar for Propane.
Reassemble burner top, making sure it is reassembled
in the correct way on the burner body.
Electrical Connection
WARNING: THIS COOKER MUST BE EARTHED.
All external wiring must comply with the IEE Regulations
for the Electrical Equipment of Buildings. Connection
to the electrical supply can be made with either a plug
and socket or be permanently wired via a double pole
switch. The cooker is supplied with a 3 core cable 2m
long. If a replacement cable is fitted it must be 250v
high temperature PVC (85°C), 1mm
not fit the socket in your home, it should be removed
and replaced with a suitable plug. Note: If a plug is fitted
which is not suitable, it must be cut off and disposed of
properly. To avoid the risk of electrocution, the plug must
not be left where children might find it and plug it into a
supply socket.
Three pin plugs to BS1363 with a capacity of not less
than 13A must be used and fitted with a 13 amp fuse
'ASTA' approved to BS 1362.
After replacing the fuse the cover must be refitted.
If the cover is lost, the plug must not be used until
a replacement cover has been obtained from your
supplier. The colour of the correct fuse carrier is that
of the coloured insert in the base of the fuse recess, or
stated elsewhere on the plug. Always state this colour
when ordering a replacement fuse carrier.
IMPORTANT The wires in the mains lead are coloured
in accordance with the following code:-
GREEN AND YELLOW: EARTH
BLUE: NEUTRAL
BROWN: LIVE
The wires should be connected into the terminal of
your plug as shown:
Electrical checks
. Should the plug
2
Hotplate check
28
EARTH CONTINUITY CHECK
The cooker must be disconnected from the power
supply. Set your meter to
adjust to zero if necessary.
Test the leads from any of the cooker's earth points
(e.g. inside electric box cover) - to the earth pin on
the cooker's plug - resistance should be less than
1 (ohm). If it is not, check all the earth wires for
continuity. Check that all contacts are clean and tight.
Re-check. If the resistance is still greater than 1
there may be a problem, consult a qualified electrical
engineer.
POLARITY CHECK
The cooker must be connected to the power supply.
Your meter should be set on 300V ac scale.
Test at the cooker terminal block:
1. Test leads from L to N. Your meter should read
approx. 220-240V ac.
2. Test leads from L to E. Your meter should read
approx. 220-240V ac.
3. Test leads from N to E. Your meter should read
approx. 0-15V ac.
If the readings are different from these values there is
an electrical fault. Rectify any fault and repeat the test.
If necessary repeat the test at the supply system socket/
spur - if the fault also occurs at this stage then there is
a house system fault which requires attention by the
Electrical Authority.
The customer should be warned NOT to use the
appliance until this examination has been carried out.
Check each burner in turn. Each burner has a flame
safety device (FSD) that stops the flow of gas to the
burner if the flame goes out.
For each burner, press ignition switch on facia panel
and push in and turn the knob to the solid flame symbol
( ).
Keep holding the knob pressed in to let the gas through
to the burner for few seconds. If, when you let go of the
control knob, the burner goes out, the safety device
has not held in. Turn the control to the off position and
wait one minute, then try again this time holding in the
control knob for slightly longer.
(ohm) on the X1 scale and
(ohm)