Table of Contents
Advertisement
BOILER
MODEL
NUMBER
(1)
WPSB-3
WPSB-4
WPSB-5
WPSB-6
WPSB-7
WPSB-8
WPSB-9
For altitudes above 2,000 ft. rating should be reduced at the rate of 4% for each 1,000 ft. above sea level.
†
Heating Capacity is based on D.O.E. (Department of Energy) test procedure.
Add model number suffix 'P' for Propane.
(1)
Net AHRI Water rating shown based on piping and pickup allowance of 1.15. Consult manufacturer before
(2)
selecting boiler for installations having unusual piping and pickup requirements, such as intermittent
system operation, extensive piping systems, etc.
MBH = 1,000 Btuh = British Thermal Unit Per Hour
(3)
-
Ratings marked "Net AHRI Ratings" indicate amount of remaining heat input used to heat radiation or terminal units.
Net AHRI Ratings shown are based on allowance of 1.15 in accordance with factors shown on AHRI Standard as
published by The Hydronics Institute.
-
Selection of boiler size should be based upon "Net AHRI Rating" being equal to or greater than calculated heat loss of
the building.
-
Consult manufacturer before selecting boiler for installations having unusual piping and pickup requirements.
BOILERS FOR USE AT HIGH ALTITUDE
Boiler is factory equipped for use at altitudes of 0-2,000 feet above sea level.
For use at altitudes above 2,000 feet above sea level, input ratings are reduced by change in main burner orifice size.
For altitudes above 2,000 feet above sea level, input ratings should be reduced at rate of 4% for each 1,000 feet above
sea level. Consult National Fuel Gas Code (NFPA54/ANSI Z223.1-latest edition), or manufacturer for correct orifice sizing
information.
17 - BOILER RATINGS AND CAPACITIES
Table 1 - Ratings and Capacities
† NATURAL GAS
(2)
NET AHRI
(3)
Heating
Input
RATING
Capacity
Mbh
Water,
(3)
Mbh
(3)
Mbh
75
63
55
112
94
82
150
126
110
187
157
137
225
188
163
262
221
192
299
252
219
† PROPANE GAS
(2) NET
HEATING
INPUT
CAPACITY
(3)
Mbh
RATING
(3)
MBH
70
59
105
88
140
118
175
147
210
176
245
208
280
237
28
AFUE
AHRI
INTERMITTENT
(3)
IGNITION WITH
VENT DAMPER
Mbh
51
84.0
77
84.0
103
84.1
128
84.1
153
84.0
181
84.0
206
84.0
PN 240013090 REV. C [10/01/2021]
Advertisement
Table of Contents
