Thermo Products OH6FX072DV4 User Manual
INSTALLATION AND OPERATION MANUAL
FOR 2 – STAGE RIELLO BURNER
ADDENDUM TO ( Mo – 437 manual )
FOR USE WITH MODEL:
OH6FX072DV4
PLEASE READ THESE INSTRUCTIONS PRIOR TO INSTALLATION, INITIAL FIRING, AND
BEFORE PERFORMING ANY SERVICE OR MAINTENANCE. THESE INSTRUCTIONS
MUST BE LEFT WITH THE HOMEOWNER AND SHOULD BE RETAINED FOR FUTURE
REFERENCE BY QUALIFIED SERVICE PERSONNEL.
THERMO PRODUCTS, LLC.
BOX 217
NORTH JUDSON, IN 46366
PHONE: (574) 896-2133
MO-462
ECN 4865-MA MADE IN USA
Riello 2-stage burner specifications and applications:
MODEL
PART
MTG. PLATE
PART NO.
MTG. PLATE
GASKET
PART NO.
**NOZZLE SIZE
OD6 2-STAGE
11700
330212
.70 X 45° W
NOZZLE
PART NO.
OIL PUMP
PRESSURE
130 LOW
170 HIGH
380702
BURNER G5D
BURNER
PART NO.
Table 8: Riello burner application
380529
THE NOZZLE SIZE GIVES THE NOMINAL FLOWRATE, IN GPH, FOLLOWED BY THE SPRAY ANGLE, IN
DEGREE’S, AND THE SPRAY PATTERN, EITHER “H” FOR HOLLOW CONE OR “S” FOR SOLID CONE.
FOR EXAMPLE, A NOZZLE RATED AT 0.65 GPH @ 100 PSIG THAT PROVIDES AN 80° SPRAY ANGLE
AND A HOLLOW SPRAY PATTERN WOULD BE ABBREVIATED IN THE TABLE AS “0.65 X 80°H”.
** NOTE: The reason the Riello burner nozzle sizes are smaller than the standard Thermo Pride burner nozzles
is that pre-set pump pressures are higher, therefore achieving the same firing rate with a smaller nozzle.
For more specific burner information, specifications or service information, reference the training manual enclosed
with each Riello burner or contact:
Riello Corporation of America,
5 Pond Park Road Hingham, Massachusetts 02043
Phone: (617) 749-8292
2 STAGE FIRING RATES
CAPACITY
FIRING
RATE
NOZZLE SIZE
Riello
INPUT RATE*
(BTU/HR)
EFFECTIVE**
HEATING
CAPACITY
HIGH CAPACITY
LOW CAPACITY
HIGH FIRE 106,250/170psi 90,000
LOW FIRE
HIGH FIRE 85,000/170psi 74,000
LOW FIRE
.70 X 45° W
85,000/130psi 74,000
.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%.
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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.
COMBUSTION HEAD SETTING FOR 2-STAGE RIELLO BURNER:
This is done when fitting the nozzle, with the blast tube removed. It depends on the output of the burner and is
carried out by rotating the regulating rod, till the terminal plane of the blast tube is level with the set-point, as
indicated in the schedule.
Figure 20
In figure 20 the combustion head is set for an output of 0.75
GPH at 130 psi, while the shutter is level with set-point 2.5, as
required by the above schedule.
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