15
Grant Vortex Indoor/Utility, System and Boiler House Oil Boilers
4.4.6 Two pipe oil supplies
Riello RDB burner - See Fig. 7
1 The fuel pump is supplied for use with a single
pipe fuel supply system. For use on a two pipe
system, it is necessary to fit the By-pass screw (see
Fig. 7) into the tapping in the return port.
2 The By-pass screw is supplied in the boiler
accessory pack.
3 On all models except 155/200 and 200/240:
Remove the plastic burner cover (secured by two
screws).
On 155/200 and 200/240 models only:
Remove the plastic burner cover (secured by three
screws). For ease of access to the fuel pump, to fit the
by-pass screw and connect the oil lines, the burner can
be removed from the boiler. To do this, unscrew the
single nut at the top of the burner (using a 13 mm
spanner) and withdraw the burner from the boiler.
4 Remove and discard the blanking plug from the
return connection of the pump and fit the By-pass
screw using an hexagonal key.
5 Connect the return oil flexible fuel hose to the pump.
6 Connect the
3
/
8
" to
1
/
4
" BSP adaptor to the flexible
fuel hose.
7 Flexible fuel hoses and adaptors are available to
purchase from your local stockist.
Fig. 6 - Tiger loop 'de-aeration' device
4 - GENERAL BOILER INFORMATION
Fig. 7 - Riello RDB pump
1 Oil inlet connection
2 Return connection
3 By-pass screw
4 Pressure gauge connection
5 Pressure adjuster
6 Vacuum gauge connection
7 Solenoid
8 Supply to nozzle
1 A 230/240 V ~ 50 Hz mains supply is required.
The boiler must be earthed.
2 The supply must be fused at 5 Amp and there must
only be one common isolator for the boiler and
control system, providing complete electrical
isolation.
3 A fused double pole switch or a fused three pin
plug and shuttered outlet socket should be used for
the connection.
4 The power supply cable should be at least 0.75 mm²
PVC as specified in BS 6500, Table 16.
5 All the wiring and supplementary earth bonding
external to the boiler must be in accordance with
the current I.E.E. Wiring Regulations.
6 Any room thermostat or frost thermostat used must
be suitable for use on mains voltage.
7 In the event of an electrical fault after installation
of the boiler, the following electrical system checks
must be carried out:- Short circuit, Polarity, Earth
continuity and Resistance to earth.
Electricity supply
4.5
1/4" BSP female
connections
Tiger Loop
SUPPLY
TO PUMP
RETURN
FROM PUMP
SUPPLY
FROM TANK
1
2
3
4
5
6
7
8
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