Thermo Pride OH5-85DXE, Installation And Operation Manual

All installations and services must be performed by qualified service personnel. 

7 

 
 
G. BURNER SPECIFICATIONS AND APPLICATIONS 

RIELLO BURNER APPLICATION CHART 

                   MODEL 
PART 

OH5 2 STAGE 

MTG. PLATE 
PART NO. 

35750 

MTG. PLATE 
GASKET 
PART NO. 

330088 

**NOZZLE 
    SIZE 

.70 X 45

°

 W 

NOZZLE 
PART NO. 

380702 

OIL PUMP 
PRESSURE 

130 LOW 
                  170 
HIGH 

BURNER G-51 

BURNER  
PART NO. 

380695 

* INSULATOR   S = SLEEVE    OR    N = NONE

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 
                                                                                    (617) 749-8292

 
  
* Based on #2 domestic heating fuel oil having heating value of 140,000 BTU per gallon. 
** Based on thermal efficiency of 84%-85%. 

2 STAGE FIRING RATES

OH5-85DXE***

NOZZLE SIZE

Riello

INPUT RATE* 

(BTU/HR)

EFFECTIVE** 

HEATING 

CAPACITY 

HIGH FIRE 

106,250/170psi

85,000 

LOW FIRE 

   .70 X 45

°

 W 

85,000/130psi 

74,000