Boiler Controls; Heating System Controls; Electricity Supply - Grant Vortex Eco Series User Instructions

2.5

BOILER CONTROLS

BOILER THERMOSTAT
This dial, located on the boiler control panel, allows the
temperature of the water leaving the boiler to heat the radiators
(and/or other heat emmiters if fitted) and domestic hot water to be
adjusted.
The boiler control panel is within the boiler casing, on the lower
right hand side. The front casing door must be removed in order
to access the control panel (refer to Section 1.2). See Figure 2-1
for the details of the control panel.
! NOTE !
If you have a cylinder thermostat on your hot water
cylinder, this will control the temperature of your domestic
hot water.
The boiler thermostat setting must be equal to or greater
than the cylinder thermostat setting to enable the cylinder
thermostat to control the domestic hot water system.
OVERHEAT THERMOSTAT
Your boiler is fitted with a safety overheat thermostat which
will automatically switch off the boiler in the case of a control
malfunction causing overheating.
If your boiler goes off and you try to light it but nothing happens
and the 'Lock-Out' reset button on the burner is not lit, the
overheat thermostat has probably operated. The boiler will not
light until the overheat thermostat is reset.
To reset the overheat thermostat, unscrew the small plastic cap
marked "overheat reset" (see Figure 2-1), press the button and
replace the cap.
If this condition continually repeats, contact your service enigneer.
TEST SWITCH
A test switch is fitted to the control panel (see Figure 2-1) to
allow the Service Engineer to test-fire the boiler without requiring
access to the inside of the property.
It does this by overriding the heating system controls (see Section
2.6) for a short period of time, before automatically switching off
and allowing the boiler to be controlled by the heating system
controls again.
! NOTE !
The mains power supply still needs to be switched on for
the test switch to work.
2.6

HEATING SYSTEM CONTROLS

PROGRAMMER (IF FITTED)
If a programmer is fitted, it will control the times that the boiler
heats the central heating system and hot water cylinder (if fitted).
Refer to the manufacturer's instructions supplied with your
programmer for further details.
ROOM THERMOSTAT
This thermostat allows you to control the room temperature at
which the boiler will fire to provide central heating to your property.
The room thermostat is usually located in a downstairs area such
as a hallway or living area.
If your heating system is 'zoned' you will have more than one
room thermostat, with each thermostat controlling the temperature
of a separate heating zone.
! NOTE !
For your boiler to operate to provide you with heating,
the programmer (or timer) must be in an 'ON' period for
heating AND the room thermostat must be 'calling' for heat.
Page 6
CYLINDER THERMOSTAT
This thermostat controls the temperature of the water in your hot
water cylinder (if fitted), as long as your cylinder is being heated
by the boiler.
When the water temperature in the cylinder is below the
thermostat set temperature, it will 'call' for the boiler to operate to
heat your hot water.
! NOTE !
For your boiler to operate to provide heat to your hot water
cylinder, the programmer (or timer) must be in an 'ON'
period for hot water AND the cylinder thermostat must be
'calling' for heat.
THERMOSTATIC RADIATOR VALVES
Your heating system may also include Thermostatic Radiator
Valves (or TRVs). If you have them, they will be fitted on some or
all of your heating system radiators.
A TRV is a self-regulating valve, i.e. not connected to the
other heating system controls, such as a programmer or room
thermostat, and is designed to regulate the temperature in the
room in which it is situated.
A TRV senses the air temperature around it and controls the
water flow to the radiator on which it is fitted to regulate its heat
output to the room. The head of the TRV can be rotated to set it to
give the required room temperature. Once correctly set, it should
ideally be left in that position and not used as an on/off control for
the radiator.
As the correct operation of a TRV is based on it sensing the air
temperature of the room it is fitted in, take care not to cover the
TRV head (with curtains, furniture etc).
Refer to the manufacturer's instructions supplied with any TRVs
fitted to your heating system for further details.
2.7

ELECTRICITY SUPPLY

The boiler requires a 230/240 V AC 50 Hz supply. It must be
protected by a 5 Amp fuse.
! WARNING !
The electrical connections to the boiler must be earthed.
Section 2: Using your Boiler