Installation Guide
Part number 550-100-066/0608
105
g a s -f i r e d w at e r b o i l e r — Boiler Manual
Ratings — Ultra boilers
Ratings and engineering data
DOE
Boiler
Model
Number
DOE
Heating
Capacity
CSA
Input
CSA
Output
Net
I=B=R
Ratings
Boiler
Water
Content
DOE
Seasonal
Efficiency
Vent/Air
Pipe
Size
Btuh (Note 2) Btuh (Note 7) Btuh (Note 7) Btuh (Note 3) Gallons AFUE, % (Note 1)
(Note 4)
Ultra-80
71,000 80,000 71,000 62,000 0.69 93.0 2” or 3”
Ultra-105
94,000 105,000 94,000 81,000 0.82 92.0 2” or 3”
Ultra-155
139,0000 155,000 139,000 123,000 1.17 93.0 3” or 4”
Ultra-230
207,000 230,000 207,000 183,000 1.57 92.8 3” or 4”
Boiler
Model
Number
CSA
Input
CSA
Gross
Output
Net
I=B=R
Ratings
Boiler
Water
Content
Combustion
Efficiency
Thermal
Efficiency
Vent/Air
Pipe
Size
Btuh (Note 7) Btuh (Note 7) Btuh (Note 3) Gallons % (Note 5) % (Note 6)
(Note 4)
Ultra-310
310,000 289,000 252,000 2.1 93.3 92.9
4”
Notes
1
As an Energy Star Partner, Weil-McLain has determined that Ultra boilers meet the Energy Star guidelines for energy efficiency.
2
Based on standard test procedures prescribed by the United States Department of Energy.
3
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 pickup. Ratings are based on a piping and pickup allowance of 1.15. An additional allowance should be
made for unusual piping and pickup loads.
4
Ultra boilers must be direct-vented.
Ultra boilers require special venting, consistent with Category IV boiler.
Use only the vent materials and methods specified in this manual.
Ultra-80 and -105 vent/air pipes can be either 2” or 3” pipe. Vent/air pipe length limits for 2” piping are not as long as for 3” piping.
Ultra-230 vent/air pipes can be either 3” or 4” pipe. Vent/air pipe length limits for 3” piping are not as long as for 4” piping.
5
Combustion efficiency is based on I=B=R testing procedure BTS-2000, and equal to 100% minus ue loss.
6
Thermal efficiency is based on I=B=R testing procedure BTS-2000.
7
Ratings shown are for sea level applications only. For altitudes from sea level to 5,500 feet above sea level, the Ultra boiler requires no
modifications and automatically derates itself by approximately 4% per 1000 feet above sea level. For elevations above 5,500 feet, contact
your local Weil-McLain sales office for details.