©
EUROHEAT
DISTRIBUTORS (H.B.S) LTD.April 2007
E&OE Instructions Part Number IN1190 Ed B
H11##0105A
22
Commissioning should not be undertaken if the wind is
abnormally high or blustery, nor should it be undertaken
by anyone without suitable experience, testing equipment
and working knowledge of the relevant standards and
regulations.
The customers who will operate the stove are an essential
component of any installation. Ensuring they understand the
operation of the stove, its controls and what to expect from
the installation, whether simple or complex, is probably the
most important single aspect of commissioning. Someone
who understands never queries a satisfactory stove, but will
tell you when something actually is wrong.
Check box`s
As each section of commissioning is completed
tick the confirmation box.
Pre-Commissioning Checks
The installation should be inspected to ensure the
work is complete and the workmanship satisfactory.
The commissioning engineer may be held responsi-
ble for any faults with the installation that would have
been apparent at the time of commissioning. No
stove should be signed as commissioned if any part
of the installation does not comply with the relevant
standards and regulations or requirements of these
instructions.
The oil tank should be examined to confirm there
is a supply of the correct grade of oil, that a filter and
working isolation valve are fitted. Having verified that
the oil pipe work to the stove is complete and that the
fire valve is opened, the tank isolation valve should
be opened and the pipe work inspected for leaks. The
pipe into the inlet of the metering valve should be un-
coupled, and a minimum of one litre of oil collected into
a suitable receptacle. If dirt, water or air bubbles are
present in this sample additional oil should be allowed
through the pipe work until it is free from contaminates.
The fuel pipe work should be reassembled.
(Note : air with in the oil supply system or oil control
valve will affect the ability of the oil control valve to allow
the correct flow rate. If incorrect flow rate is suspected,
examination of the oil control valve and supply line for air
is required).
The stove’s combustion pressure testing point
located. The draught stabilizer should be examined
to ensure it opens and closes freely before lighting
the stove. Following the lighting instructions relevant
to the stove being commissioned.
(Note: Do not light the burner if oil is present in the burner
base. Remove this oil before lighting).
Commissioning Concepts
Combustion for the consideration in this document is
the burning of the correct mixture of a fuel (oil) and
oxygen ( air). The fuel is metered by a Toby oil control
valve. This is an accurately Swiss manufactured
control with a precalibrated flow rate for the type of
oil fuel specified. All Harmony stoves as standard are
calibrated for Class C2 kerosene to BS2869 suitable
for vapourising pot burners. For initial consideration the
oil control valve is assumed to be correctly calibrated.
However in practice the viscosity is very rarely correct
and may result in slight alterations to the precalibrated
flow rate. (See flow rate correction)
The oil control valve is pre-mounted on a location frame
which should not require any alteration. However an
inspection should be made to confirm it is level.
Air for combustion is drawn into the oil burner by the
negative pressure created by the chimney system
(chimney draught). This air movement is the main
consideration when commissioning the appliance.
It is the one factor we cannot control as all chimney
systems are different. The amount of air entering the
burner is very important as the incorrect quantity will
result in one of the following problems.
Excessive negative pressure
(Negative Pressure) at low fire (No1)
Soot build up (for example overnight).
Damage to catalyser. Damage to igniter system.
Increased room heat on boiler model stoves
Smell of oil vapour from over heated oil supply
components.
Low negative pressure at Low fire (setting No1)
Vaporization slow at lighting resulting in sooty glass.
Excessive chimney draught at high settings
Poor flame effect. Noisy operation
Poor chimney draught at high settings
Sooty interior.
The stove is fitted with a draught stabilizer. The
stabilizer is in most cases used to prevent the flue
draught exceeding the maximum requirement for
high fire. However in cases of erratic or excessive
flue draught the stabilizer can be utilized for low fire
negative pressure control (See solving negative
pressure problems)
Burner Operation
The oil burner can be referred to as a dry burner.
During the burning operation the burner base is dry
of oil. As the oil enters through the oil supply pipe it
is vaporised by the heat reflected from the catalyser.
Under no circumstances should the appliance be
operated with oil in the burner other than a small
damp patch at time of ignition.
The ability of the burner to burn correctly is dependant
on the correct mix of fuel (oil) and oxygen ( air).
Minimum commissioning equipment required.
Negative pressure meter. We recommend the use of
MS026 Dwyer measurement gauge (available from
Euroheat)
