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
