20044359
20
Installation
4.11
Gas pressure
The Tab. G is used to calculate manifold pressure taking into ac-
count combustion chamber pressure.
Tab. G
Calculate the approximate maximum output of the burner as fol-
lows:
subtract the combustion chamber pressure from the gas pres-
sure measured at test point 1)(Fig. 17);
find the nearest pressure value to your result in column A or B
(Tab. G) for the burner in question;
read off the corresponding output on the left.
Example with natural gas
–
Maximum output operation
–
Gas ring 2)(Fig. 13) adjusted as indicated in diagram (Fig. 14)
–
Gas pressure at test point 1)(Fig. 17)
= 3“ WC
–
Pressure in combustion chamber
= 0.8“ WC
3 - 0.8
= 2.2“ WC
A maximum output of 990 MBtu/hr shown in Tab. G corresponds to
2.2” WC pressure, column A.
This value serves as a rough guide, the effective delivery must be
measured at the gas meter.
Model
MBtu/hr
kW
p (“ WC)
A
B
RS 28/E
624
699
795
891
986
1078
1174
1232
183
205
233
261
289
316
344
361
0.98
1.22
1.57
1.85
2.17
2.48
2.76
2.95
0.98
1.3
1.69
2.05
2.28
2.68
3.07
3.58
RS 38/E
870
979
1099
1211
1327
1440
1552
1665
255
287
322
355
389
422
455
488
1.02
1.22
1.46
1.69
1.89
2.13
2.36
2.6
1.02
1.38
1.77
2.28
2.72
3.11
3.54
4.21
Fig. 17
D2786
Содержание RS 28/E
Страница 2: ...Original instructions...
Страница 31: ...Appendix Spare parts 29 20044359 A Appendix Spare parts...