BENSON MH300, Инструкция пользователя

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The location must also allow for adequate
clearance for the air supply, return air circulation, oil
supply, electrical supply, whilst also providing good
and safe working
access.
Any combustible material adjacent to the heater or
flue system must be so placed or shielded so that
its surface temperature does not exceed 65
o
C.
Warning
TRANSPORTATION
The heater should be kept in a
HORIZONTAL
position at all times when being transported by
fork lift truck or other mechanical devices
2.1 Fuel supply - general
The Benson MH 300 of oil fired heater are all
manufactured and pre-set for use with 35 second
gas oil delivered to the burner via a suitable piped
system from the oil storage tank.
The constraints of the application will, to a large
extent, determine whether it is preferable to use a
single pipe gravity feed system, or whether the two
pipe pumped system is more appropriate.
All pipe work must be constructed and installed so
that it does not permit the ingress of air.
The construction, size, and position of the oil
storage tank must take account of the current
regulations, as well as suiting the requirements of
the installation.
Caution
On pumped systems always check that the pump is
correctly set up prior to running, and always ensure
that valves are open allowing a free flow of oil
through the system.
2.2 Fuel
In order to promote trouble free operating it is
necessary that the oil within the storage tank and
oil line does not fall below the cold filter plugging
point (cfpp), in this country and with class D fuel
(also referred to as gas oil). The critical
temperature is -4oC for this summer grade.
The cfpp critical temperature for the winter grade is
-12oC.
If summer grade fuel is stored for winter use in
areas prone to severe frosts and low temperatures
it will be necessary to insulate or even heat the
supply tank and pipe work.
Warning
The pump pressure must not exceed a maximum of
0.4 bar, this is because beyond this point gas is
liberated from the oil.
2.3 Storage tank
It is advisable to leave the tank unpainted on the
inside, but to paint the outside with a proprietary
grade of anti-corrosive paint.
A galvanised or open topped tank is strictly not
allowed.
If a medium density polyethylene oil tank is to be
used then it must be OFTEC certified to OFS T-
100.
Local, National, European and Fire regulations
must also be complied with.
2.4 Single pipe system (gravity feed)
For installations where the oil tank is 300mm or
more above the level of the fuel pump the principle
of gravity feed may be used.
The draw off point for the supply to the burner must
not be positioned any lower than 100mm above the
bottom of the tank.
Where a return valve is fitted this must be tamper
proof to prevent inadvertent operation.
Caution
If the valve is closed when the pump is running the
oil pressure can be increased sufficiently so as to
cause damage to the seals within the pump.
The return oil should preferably be discharged
through an elbow onto a tank plate situated within
the tank, this should be positioned so as not to
introduce air or air bubbles into the draw off pipe.