Williamson-Thermoflo GWC-070 Manual page 100

GWC -
gas fired water boiler
Dimensions and ratings
Multiple GWC boilers — ratings and engineering data — maintain the clearances shown on pages 6 and 7 —
Figure 106
see Figure 28, page 23 and Figure 29, page 23 for layout options
Boilers in system
Model GWC
070 105 140
2
2
2
3
3
3
4
4
4
5
5
5
6
6
6
7
7
7
8
8
8
Note 1
Based on standard test procedures outlined by DOE for individual boilers.
Net I=B=R ratings are based on piping and pickup allowance of 1.15.
Note 2
Consult Williamson-Thermoflo for other allowances.
All GWC installations require a separate vent pipe and termination for each boiler.
terminate vents as described in vent/air installation instructions in this manual.
Note 3
Combustion air piping can be individually piped or manifolded. See Figure 37, page 31, for manifolded air piping.
100
— Boiler Manual
Total
CSA
input
Input,
MBH
175
-
140
210
280
2 350
210
315
420
3 525
280
420
560
4 700
350
525
700
5 875
420
630
840
6 1050
490
735
980
7 1225
560
840
1120
8 1400
(continued)
DOE Heating Boiler
capacity H.P.
Output,
-
MBH
Note 1 -
130 3.9
194 5.8
260 7.8
322 9.6
195 5.8
291 8.7
390 11.7
483 14.4
260 7.8
388 11.6
520 15.5
644 19.2
325 9.7
485 14.5
650 19.4
805 24
390 11.7
582 17.4
780 23.3
966 28.9
455 13.6
679 20.3
910 27.2
1127 33.7
520 15.5
776 23.2
1040 31.1
1288 38.5
Vent piping cannot be manifolded
Manifolded
Net water
combustion air
ratings
duct size
Square
MBH
inches
Note 3
Note 2
Figure 37, page 31
112 70
168 105
226 140
280 175
168 105
252 158
339 210
420 263
224 140
336 210
452 280
560 350
280 175
420 263
565 350
700 438
336 210
504 315
678 420
840 525
392 245
588 368
791 490
980 613
448 280
672 420
904 560
1120 700
. Install and
Part number 550-142-056/0411