Part number 550-100-090/0809
121
gas
-
fired
water
boiler
—
Boiler Manual
MAINTENANCE & SPECIFICA
TIONS
Ratings — Ultra boilers
Figure 125
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
95 2
2” or 3”
Ultra-105
94,000
105,000
94,000
81,000
0 82
95 3
2” or 3”
Ultra-155
139,000
155,000
139,000
123,000
1 17
95 6
3”
Ultra-230
207,000
230,000
207,000
183,000
1 57
95 4
3” or 4”
Ultra-299
270,000
299,000
270,000
234,000
2 10
96 4
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-399
399,000
365,000
317,000
2 1
91 7
91 3
4”
Notes
1
As an Energy Star Partner, Weil-McLain has determined that Ultra boilers meet the Energy Star guidelines for energy efficiency.
NOTE: Adjusting boiler firing rate will affect AFUE rating.
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 flue 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.