23
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. Complete the Warranty Card and submit it to PB
Heat, LLC.
10. Hang the Installation, Operation and Maintenance
Manual, User’s Information Manual, and Vent
Manufacturer’s Information Manual in an accessible
position near the boiler.
START-UP PROCEDURES
Table 7.1a: Meter Conversion Natural Gas
(U.S. Customary Units)
Table 7.1b: Meter Conversion Natural Gas
(SI Metric System)
Burner inputs in kW for various meter timings and
heating values. (Tables based on 0.0566 cubic meters
of gas through the meter).
Burner inputs in Btu/hr for various meter timings and
heating values. (Tables based on 2 cubic feet of gas
through the meter).
Time that
meter is
read (sec)
Heat Value of Gas
(MJ/cubic meter)
37.26 38.19 39.12
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
84.36
70.30
60.25
52.72
46.86
42.18
38.34
35.15
32.44
30.13
28.12
26.36
24.81
23.43
22.20
21.09
20.08
19.17
18.34
17.57
16.87
86.46
72.05
61.76
54.04
48.03
43.23
39.30
36.03
33.25
30.88
28.82
27.02
25.43
24.02
22.75
21.62
20.59
19.65
18.80
18.01
17.29
88.57
73.81
63.26
55.35
49.20
44.28
40.26
36.90
34.06
31.63
29.52
27.68
26.05
24.60
23.31
22.14
21.09
20.13
19.25
18.45
17.71
Time that
meter is
read (sec)
Heat Value of Gas
(Btu/cubic foot)
1000 1025 1050
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
288000
240000
205714
180000
160000
144000
130909
120000
110769
102857
96000
90000
84706
80000
75789
72000
68571
65455
62609
60000
57600
295200
246000
210857
184500
164000
147600
134182
123000
113538
105429
98400
92250
86824
82000
77684
73800
70286
67091
64174
61500
59040
302400
252000
216000
189000
168000
151200
137455
126000
116308
108000
100800
94500
88941
84000
79579
75600
72000
68727
65739
63000
60480
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