Harry Taylor HT2000, Installation & Servicing Manual

Page: 27 / 56

27
Replacement and tensioning is carried out
as follows.
Note
The maximum displacement at the mid point
of the top edge of the belt must not be
greater than 16mm per metre of span, when
a force of 3kg is applied in a plane
perpendicular to the belt.
(a) Loosen fan motor securing bolts on
chassis.
(b) Loosen fan motor slide adjustment bolt.
(c) Slide fan motor towards fan to slacken
belts.
(d) Replace belts, pull fan motor away from
fan until belts are tight.
(e) Tighten adjustment bolt to hold motor.
(f) Tighten fan securing bolts ensuring that
the fan is square and the pulleys aligned.
(g) Check belt tension, making final
adjustments as necessary.
(h) Tighten and clamp fasteners to hold fan
motor in position.
Heat Exchanger
The heat exchanger requires a visual
inspection at least once per year, this should
be accompanied by cleaning.
It is recommended that a flue brush and
vacuum cleaner be used to facilitate this.
Access to the heat exchanger is gained
through the removal of the rear upper panel
and heat shield.
Servicing and cleaning should be performed
as follows:
(a) Remove brass nuts and cover from heat
exchanger end assembly to expose heat
exchanger tubes.
(b) Remove any accumulated deposits from
the tubes.
(c) Particular attention should be paid to the
upper internal surfaces of the tubes, where
through convection heavier deposition is
likely to occur.
(d) Any deposits which may have
accumulated within the combustion chamber
can be removed with a vacuum cleaner
once the burner is removed.
Note
It is most important that a build up of
deposits is not allowed to occur as this can
have an adverse effect upon the efficiency
of the heater and reduce the life of the heat
exchanger.
(e) The heat exchanger and combustion
chamber should be visually inspected for
signs of splits, cracks, and distortion.
(f) All gaskets should be checked to ensure
that they continue to provide a gas tight
seal, if there is an element of doubt then
they should be replaced.
If the condition of the heat exchanger
gives cause for concern the Service
Department at Benson Heating should be
advised pending a more detailed
examination
Electrical Supply
All connections must be checked to ensure
that they are secure, and free from
corrosion.
Terminals and connections should also be
checked to ensure that no stray strands are
bridging terminals.
Electrical continuity should also be checked.
Oil Supply
The oil supply pipe work, tank, and fittings
should all be inspected to ensure that they
are free from corrosion, and to ensure that
where brackets have been fitted these
remain secure and offer adequate support.
The oil filter should be replaced with a new
one, and the system should be checked for
leaks. If the oil level is such to allow removal
of any sludge or other contaminants form
the tank this too should be undertaken,
particularly if there have been problems of
poor firing associated with contaminants
reaching the burner.