PB Heat DE - Manual (Page 28)

26
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:
a. Turn gas supply off.
b. Set thermostat or controller above room
temperature to call for heat. Watch for igniter
glow at pilot burner.
c. Igniter will continue to glow for 30 seconds, de-
energize for 30 seconds, then re-energize and
glow for another 30 seconds. It will then de-
energize for 5 minutes before restarting the
sequence.
d. Turn gas supply on.
e. Reset the boiler and control by following
Operating Instructions.
f. Observe boiler operation through one complete
cycle.
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