Potterton Prorile Prima 30e Installation And Servicing Instructions page 7

TECHNICAL DATA - Page 7
BOILER INJECTOR
SIZE SIZE
Min
2.9mm
30
Max
Min
40 3.1mm
Max
Min
50 3.5mm
Max
Min
60 3.6mm
Max
Min
80 4.4mm
Max
Min
100 4.7mm
Max
CIRCULATION PUMP SELECTION
The resistance through the heat exchanger when operating
with a water flow rate producing an 11
maximum boiler output are shown in TABLE 2. If other
controls, such as three-position valves are used in the system,
the resistance through them, quoted in their manufacturer's
literature must be taken into account. The pump may be fitted
on either the flow or return and MUST be wired directly to the
boiler terminal block, see FIG. 23. It must be fitted with two
isolating valves which are positioned as close to the pump as
possible. Closing of any valve must always leave the open
vent unobstructed.
FIG. 5 PRESSURE LOSS ACROSS BOILER
GAS RATE INPUT
3 3
m /h (ft /h ) kW(Btu/h)
0.71 (25.23) 7.65 (26116)
0.87 (30.61) 9.29 (31686)
1.03 (36.23) 10.99 (37500)
1.06 (37.40) 11.35 (38710)
1.21 (42.86) 13.00 (44360)
1.37 (48.31) 14.65 (50000)
1.39 (49.11) 14.90 (50826)
1.54 (54.35), 16.49 (56250)
1.71 (60.39) 18.32 (62500)
1.73 (61.07) 18.53 (63211)
1.89 (66.84) 20.28 (69182)
2.05 (72.46) 21.98 (75000)
2.13 (75.19) 22.81 (77821)
2.43 (85.94) 26.07 (88945)
2.74 (96.62) 29.31 (100000)
2.78 (98.09) 29.75 (101523)
3.10 (109.38) 33.18 (113208)
3.42 (120.77) 36.64 (125000)
0
C temperature rise at
OUTPUT
kW(Btu/h)
3.9
5.9
8.6
6.9
9.1
11.6
8.0
10.0
11.6
11.0
13.0
15.0
7.2
9.3
11.8
8.6
10.7
13.1
TABLE 2
Boiler size Water Flow Rate
Litres/sec
30e .19
40e .25
50e .32
60e .38
80e .51
l00e .64
BURNER PRESSURE
mbar in wg
1.6
2.4
3.5
2.8
3.7
4.7
3.2
4.0
4.7
4.4
5.2
6.0
2.9
3.7
4.7
3.5
4.3
5.3
BOILER
RESISTANCE
2
gal. mm kN/m in wg
2.5 1.5 6.0
3.34 3.0 12.0
4.17 4.25 17.0
5.0 6.25 25.0
6.67 7.0 28.0
8.4 11.0 44.0