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2 STAGE FIRING RATES
CAPACITY
FIRING
RATE
NOZZLE SIZE
Riello
INPUT RATE*
(BTU/HR)
EFFECTIVE**
HEATING
CAPACITY
HIGH FIRE 106,250/170psi 90,000
HIGH CAPACITY
LOW FIRE
.70 X 45° W
85,000/130psi 74,000
HIGH FIRE 85,000/170psi 74,000
LOW CAPACITY
LOW FIRE
.50 X 45° W
70,000/130psi 60,000
Table 9: Riello 2-stage firing rates
* Based on #2 domestic heating fuel oil having heating value of 140,000 BTU per gallon.
** Based on thermal efficiency of 84%-85%.
MOUNTING THE 2-STAGE RIELLO BURNER:
It is necessary that the insulation gasket be placed between the mounting plate and the burner flange.
The insulating gasket has six holes, which, if necessary, can be modified as shown. (see figure 14-1)
Figure 14-1: Burner gasket and mounting Figure 14-2: Burner fixing and hinge assembly
Verify that the installed burner is lightly leaned towards the button. (See figure 14-1) The burner is
designed to allow entry of the flexible oil-lines on either side of the burner.