Section 1: Introduction Page 5
1.4 BOILER COMPONENTS
All burners are pre-set for use with kerosene and are supplied
ready to connect to a single pipe fuel supply system with a loose
exible fuel line and 3/8ʺ to 1/4ʺ BSP male adaptor supplied with
the boiler.
If required, an additional exible fuel line (900 mm in length,
product code: RBS36 or 600mm in length, product code:
RBS36XS) and 3/8” to 1/4” BSP male adaptor (product code:
Z3003602) are available to purchase from Grant UK, for two-pipe
oil supply systems.
The temperature of the water leaving the boiler to heat the
radiators and hot water cylinder is user adjustable.
The boiler is tted with an overheat thermostat (which allows
it to be used on a sealed central heating system) which will
automatically switch o the boiler if the heat exchanger exceeds a
pre-set temperature of 110°C ± 3°C.
The control panel is tted with an ON/OFF switch, service switch,
boiler thermostat control knob and the manual reset button for the
overheat thermostat.
Figure 1-1 shows the position and details of the control panel for
the Vortex Pro External boiler.
1.4.1 BOILER CONTROLS
To access the control panel, remove the front casing door from
the boiler. The controls on the panel are as follows:
Boiler On/O switch
This switches the boiler on and o. The boiler ON/OFF switch
incorporates a ‘mains on’ neon which lights when the boiler is
switched on. Please note that the ‘mains on’ neon does not
necessarily indicate that the burner is ring.
! NOTE !
If the ON/OFF switch is set to o the boiler will NOT supply
central heating or heat domestic hot water (if a hot water
cylinder is connected to the boiler). The built-in frost
thermostat will also not operate.
Service/Test Switch (External Modules only)
A service switch is tted to the control panel to allow the Service
Engineer to test-re the boiler.
Heating Thermostat
This control allows the temperature of the water leaving the boiler
to heat the radiators (and domestic hot water) to be adjusted. This
will be set by the installer to the optimum temperature for ecient
operation of the boiler. It should be left set in this position.
Overheat Thermostat (Overheat Reset)
The boiler is tted with a safety overheat thermostat which
will automatically switch o the boiler in the case of a control
malfunction causing overheating.
Figure 1-1: Vortex Pro External boiler control panel and reset button