Ratings, Installation • start-up • maintenance • parts – Weil-McLain 78 User Manual
Page 31
• Installation • Start-Up • Maintenance • Parts
Ratings
17a
Part No. 550-141-705
31
◆
I=B=R Burner
✝ ✝
Boiler Water
Capacity
Net I=B=R Ratings
❏
Content Gals.
Packaged
✝ ■
* *
Positive
Boiler
* *
Gross
Net
Stack
Presure
I=B=R
Weight
Light
❍ ■
I=B=R
■
■
Firebox
Gas
In
Vent
Steam
Less
Oil
Gas
Output
Steam
Steam
Water
Boiler
Volume
Volume
Firebox
Dia.
to
Water
Boiler Model
GPH
MBH
MBH
Sg. Ft.
MBH
MBH
H.P.
Cu. Ft.
CFM
In. W.C.
Inches
Water
Waterline
Lbs.
▲ -378- *F ●
2.40
346
278
871
209
242
8.3
2.61
139
0.22
8
37.5
27.5
1355
▲ -478- *F ●
3.40
494
400
1250
300
348
11.9
3.97
198
0.22
8
49.0
36.0
1615
▲ -578- *F ●
4.45
641
521
1629
391
453
15.6
5.33
259
0.21
8
60.5
44.5
1875
▲ -678- *F ●
5.50
789
643
2008
482
559
19.2
6.69
320
0.21
8
72.0
53.0
2130
▲ -778- *F ●
6.50
937
7642388
573
66422.8
8.05
378
0.21
10
83.5
61.5
2390
▲ -878- *F ●
7.50
1084
886
2771
665
770
26.4
9.41
436
0.20
10
95.0
70.0
2650
▲ -978- *F ●
8.50
1232
1007
3154755
876
30.1
10.77
4
940.20
10
106.5
78.5
2910
▲ -1078- *F ●
9.60
1379
1129
3533
847
982
33.7
12.13
558
0.20
10
118.0
87.0
3165
▲ -1178- *F ●
10.60
1527
1250
3917
938
1087
37.3
13.49
616
0.19
10
129.5
95.5
3425
▲ -1278- *F ●
11.60
1674
1372
4321
1039
1193
41.0
14.85
675
0.19
12
141.0
104.0
3680
▲ Use prefix “BL” for light oil, “BG” for gas, “BGL” for gas-light oil, or “H” for boiler only for use with approved burners. Add prefix “A” to designator
for factory-assembled 78 (ABL-478). Substitute “P” for “B” for fire-tested package unit (PL-478).
*
Substitute “S” for steam, “W” for water.
●
For T-intermediate section(s) and tankless heater(s) add suffix “(number required) TIH”; for T-intermediate section(s) with cover plate(s) only add suffix “(number
required) TIP”.
◆
Burner input based on maximum of 2,000 feet altitude - for higher altitudes consult a Weil-McLain representative.
** No. 2 fuel oil - Commercial Standard Spec. CS75-56. Heat value of oil - 140,000 Btu/Gal.
❍
Consult Weil-McLain BURNER SPEC AND DATA SHEET for gas pressures required.
■
MBH refers to thousands of BTU per hour.
✝
Gross I=B=R ratings have been determined under the I=B=R provision governing forced draft boiler-burner units.
✝✝ Net I=B=R ratings are based on net installed radiation of sufficient quantity for the requirements of the building and nothing need be added for normal piping and
pick-up. Water ratings are based on a piping and pick-up allowance of 1.15. Steam ratings are based on the following allowances: 378 through 1178 - 1.333; 1278
- 1.321. An additional allowance should be made for gravity hot water systems or for unusual piping and pick-up loads. Consult a Weil-McLain representative.
*** Stack gas volume at outlet temperature.
❏
With 0.10" W.C. positive at flue collar.
Note: Sections tested for 80 PSIG working pressure.