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Table 7.1b: Meter Conversion – Natural Gas
(SI Metric Units)
Burner inputs in kW for for various meter timings and
heat values. (Table based on 0.0566 cubic meter of gas
through meter).
Time that
meter is
read (sec)
37.26
25
84.36
30
70.30
35
60.25
40
52.72
45
46.86
50
42.18
55
38.34
60
35.15
65
32.44
70
30.13
75
28.12
80
26.36
85
24.81
90
23.43
95
22.20
100
21.09
105
20.08
110
19.17
115
18.34
120
17.57
125
16.87
E. CHECK-OUT PROCEDURE
1. After starting the boiler, be certain all controls are
working properly. Check to be sure that the limit will
shut off the boiler in the event of excessive water
temperature. This can be done by lowering the limit
setting until the main burners shut down. When
proper limit function is confirmed, return the dial to
its previous setting.
2. To check operation of the ignition system safety
shut-off features:
• Refer to Figure 7.3 Operating Instructions and
Figure 6.4 Intermittent Ignition System Operating
Sequence.
24
INSTALLATION AND OPERATING INSTRUCTIONS
Heat Value of Gas
(MJ/cubic meter)
38.19
39.12
86.46
88.57
72.05
73.81
61.76
63.26
54.04
55.35
48.03
49.20
43.23
44.28
39.30
40.26
36.03
36.90
33.25
34.06
30.88
31.63
28.82
29.52
27.02
27.68
25.43
26.05
24.02
24.60
22.75
23.31
21.62
22.14
20.59
21.09
19.65
20.13
18.80
19.25
18.01
18.45
17.29
17.71
3. Low Water Cut-Off (if used) – Consult the
manufacturer's instructions for the low water cut-off
operational check procedure.
4. Check the system to make sure there are no leaks or
overfilling problems which might cause excessive
make-up water to be added. Make-up water causes
liming in the boiler and brings in oxygen. Oxygen
can cause severe damage to the boiler though
oxygen corrosion pitting.
5. Check the expansion tank and automatic fill valve (if
used) to confirm that they are operating correctly. If
either of these components causes high pressure in
the system, the boiler relief valve will weep or open,
allowing fresh water to enter the system.
6. Do not allow the system controls to subject the boiler
to excessively low water temperatures, which would
cause condensation of flue gases and corrosion of
the boiler. Operate the boiler at a temperature above
130°F (54°C). Adjust the boiler limit as required to
maintain boiler temperature above this level.
7. Check the general condition of the system including
piping support, joints, etc. Check cleanliness of the
radiators, baseboard units and/or convectors. Clean
them to the extent possible. If radiators do not heat
evenly, vent any remaining air from them.
8. Review operation and User's Information Manual
with end-user.
9. Hang the Installation, Operation and Maintenance
Manual and User's Information Manual in an
accessible position near the boiler.
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