baltur BT 17 SPN, Руководство по эксплуатации

Страница: 31 / 66

to flow through the piping.
In-tank preheating can be done with a steam-filled or hot water coil.
The coil must be placed near the suction pipe and in a position
that always keeps it immerged even when the tank is down to its
minimum level.
The extent of preheating is set by consulting the viscosity-tempe-
rature diagram. That is, the oil must be heated until its viscosity
rating is beneath the pumping limit threshold. Slight in-tank heating
is always advantageous even with fluid oils (5° E). In particular, if
this preheating is effected via installation of a steam or hot water
coil it will give considerable savings on electricity consumption. In
fact, the electrical elements in the burner must, in this case, raise oil
temperature only by that amount which corresponds to the difference
between temperature on arrival at the preheater and that at which
it is atomized. It is, however, good practice with fluid oils (5° E at
50° C), to keep in-tank preheating below 30 °C so as to prevent the
formation of gas which might disturb pump performance.
VISCOSITY - TEMPERATURE CHART
VISCOSITY
CURVES 1 - GAS OIL
" 2 - EXTRA FLUID
" 3 - FLUID 3/5
" 4 - FLUID 5/7
" 5 - HEAVY 8
" 6 - HEAVY 15-20
" 7 - HEAVY VISCO. 24 ENGLER AT 50°C
" 8 - HEAVY VISCO. 35 ENGLER AT 50°C
" 9 - HEAVY VISCO. 50 ENGLER AT 50°C
" 10 - HEAVY VISCO. 85 ENGLER AT 50°C
Pumping limit
Viscosity range for atomization
E
N
G
L
I
S
H
7 / 18
0006080304_201107
VARIANTS FOR ECODEN OR ECOFUEL BURNERS
Burners designed to operate with ECODEN or ECOFUEL have
the following differences from regular fuel oil burners:
a) stainless steel hoses
b) heating elements on the valve of the second flame
c) pump with heating element
d) air gate valve control servomotor
e) line filter with VITON seals
It is essential to construct the fuel oil supply system as shown in
drawings BT 8513/7 or BT 8896/3, shown below.