BENSON MH300, User Instructions

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from the heater and the ducting, to allow for
free movement during expansion and
contraction.
Where ducting passes through walls or
partitions sufficient clearance must be left,
irrespective of any fire stop requirement, to
allow for expansion and contraction.
Failure to adhere to these latter two points can
result in the generation and transmission of
excess noise.
Where ducting is installed in concrete flooring
a permanent membrane must be used to
isolate the ducting from the corrosive effect of
the alkaline salts within the concrete.
Care should be taken to ensure that soft
insulation material does not become
compressed and thereby lose its effectiveness.
3.2 Heater Control Installation
Warning
Isolate heater from mains before undertaking
any electrical work.
(a) Ventilation/Heat switch (summer/winter
switch)
(b) Burner High/Low switch
(c) Remote Thermostat Connection
(d) Phase selection Switch
(e) Bulkhead Light Switch
4.0 Commissioning
Note
It is a requirement that only suitably qualified
and competent personnel are allowed to
undertake the
commissioning of the heater.
It is also strongly recommended that prior to
commissioning the engineer familiarises
himself with; the information contained within
the information pack that accompanies the
heater, the heater itself, and with the specific
requirements of the installation/application.
The following checks should be carried out
after the familiarisation process.
Warning
All Heaters undergo a rigorous test programme
prior to being dispatched, whilst such a
programme does involve pre-commissioning
and setting up the heater to operate efficiently
and well within its designed operational limits,
this does not mean that on site commissioning
is less important than might otherwise be the
case. The idiosyncrasies of each installation
can only ever be allowed for, through the use
of thorough on site commissioning carried out
by trained and experienced personnel
equipped with the correct tools and apparatus.
Note
It is strongly recommended that equipment
used for the sampling and analysis of flue
gases is accurate to /- 0.1% and
maintained so that it is regularly calibrated.
4.1 Commissioning - Pretest
Check to ensure electrical safety, and inspect
and check the oil installation, testing for leaks.
(a) Ensure that the electrical supply is turned
off.
(b) Ensure that the oil supply is turned off.
(c) Check that all panels and fasteners are
secure and in place.
(d) Check that the heater is installed so that it
is square and that the support is adequate.
(e) Ensure that warm air delivery outlets are
open and that ducting is adequately supported.
(f) Ensure that if filter assemblies are fitted that
they are secure and correctly located.
(g) Check that air inlets are clear and that
return air paths are adequate.
(h) Ensure that the flue is secure, adequately
supported, and that the various joints are
properly sealed.
(i) Check that there is provision for flue gas
sampling and that this sample point can be
plugged and sealed after commissioning.
(j) Check that fan and limit stat settings have
not been disturbed and are as follows