Hydraulic Connections Light Oil - Auxiliary Pump - baltur COMIST 180 Manual De Instrucciones

HYDRAULIC CONNECTIONS (LIGHT OIL)
The pipes connecting the tank to the burner should be perfectly sealed, we advise you to use copper or steel pipes with
a suitable diameter (see table and drawing). The suction pipe must be installed so as to go up to the burner and avoid
any gas bubble accumulation. In case of several burners set up in the same boiler room, every burner must have its own
suction pipe. Return pipes are the only ones which can be piped into a single tube having a section suitable for reaching
the tank. Avoid, in any case, to connect the return pipe directly to the suction pipe.
At the rigid pipe ends you should install fuel cut-off gate valves. Filters, hoses and connection nipples are provided with
the burner. The pump is equipped with special connections (see the figure) for control instruments (pressure gauge and
vacuum gauge). For safe and noiseless running, suction pressure must not exceed 4,6 m.C.A. equal to 35 cm.Hg.
Maximum suction and return pressures : 1,5 bar.
AUXILIARY PUMP
(See BT 8666/3)
In certain cases (excessive distance or difference in height) the equipment needs to be installed with a "ring-shaped"
feeding circuit, and an auxiliary pump, thus avoiding to connect the burner pump to the tank directly.
In that case, the auxiliary pump can be started when the burner starts and stopped when it stops.
Electrical connection to the auxiliary pump is carried out by connecting the coil - (230 V) - controlled relay to terminals
"N" (terminal board of the equipment) and "R" (downstream from the burner motor relay).
Please, always follow instructions reported below:
- The auxiliary pump must be installed as close as possible to the suction fluid. - The head must be proportionate to the equipment.
We advise you to reach a flow rate at least equal to the burner pump flow rate.
- Connection-pipe sizes must be chosen according to auxiliary pump flow rate.
- Never connect the auxiliary pump directly to the burner - motor relay.
DIAGRAM OF PIPES OF FEED SYSTEM FOR LIGHT OIL BURNERS OR
HEAVY OIL BURNERS WITH MAXIMUM NOMINAL VISCOSITY 5 °E AT 50 °C
1 - Main tank
2 - Filter
3 - Circulation pump
4 - Water and plant discharge
5 - Air-gas discharge, normally closed
6 - Fuel and degasser recovery
7 - One-way valve
8 - By-pass (normally closed)
The light oil recovery tanks
(diameter ~ 150, height ~ 400) should be installed as
near as possible to the burner and should be about
0,5 m. higher with respect to the burner's pump.
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N° BT 8666/3