3
TABLE 4
Model Main burner nozzles Burner gas pressure Gas supply pressure Gas consumption (*)
Quantity Nat. gas L.P.G. Nat. gas L.P.G. Nat. gas L.P.G. Nat. gas L.P.G. L.P.G.
G30/G31 G30/G31 G30 G31
No. Ø mm Ø mm mbar mbar mbar mbar m
3
s/h kg/h kg/h
RX 19 2 3.15 1.80 9.8 28/35 20 30/37 2.64 1.97 1.94
RX 26 2 3.65 2.10 9.6 28/35 20 30/37 3.68 2.74 2.69
RX 37 3 3.40 1.95 9.6 28/35 20 30/37 4.73 3.53 3.47
RX 48 3 3.90 2.20 9.1 28/35 20 30/37 5.82 4.34 4.27
RX 55 3 4.05 2.45 11.5 28/35 20 30/37 7.32 5.45 5.37
(*) The gas consumptions refer to the calorific value at standard conditions at 15°C-1013 mbar
TABLE 5
Model Pilot nozzles Expansion vessel
Nat. gas L.P.G. Capacity Preloading Smokes Smokes Weight Weight
Ø Ø Pressure temperature flow RX RX PVA
mm mm litres bar °C gr/s kg kg
RX 19 0.29 0.24 8 1 119 24,7 101 113
RX 26 0.29 0.24 10 1 118 34,7 126 138
RX 37 0.29 0.24 −− 110 52,2 150 −
RX 48 0.29 0.24 −− 130 53,1 176 −
RX 55 0.29 0.24 −− 141 59,2 202 −
NOTE: The burner header gas pressure and inputs shown in the table refer to the boiler max. capacity
1.4 CIRCULATING PUMP PERFORMANCE
CURVES
The “RX PVA” boilers can be equipped with either
EURAMO MYL 30-25 or GRUNDFOS UPS 25-50 circula-
ting pumps. Both have a built-in speed selector for adju-
sting head and capacity.
Head and capacity performance curves of the standard
circulating pump, at different speeds, are given in figs. 3
and 4.
NOTE: Before starting the boiler check that the circu-
lating pump is not locked. To unlock the circulating
pump simply remove the front plug and wheel the
pump pin by using a notch screwdriver.
Fig. 4
EURAMO MYL 30-25
GRUNDFOS UPS 25-50
Fig. 3
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