84
12 - RATINGS AND CAPACITIES
12 TECHNICAL DATA
12 Ratings and Capacity
Model
Number
CH Input, MBH
(1)
(1)(2) CH
Heating
Capacity, MBH *
(1)(3)
Net AHRI
Rating Water, MBH
(2)
AFUE%
Maximum
Minimum
GMHB125
122
24.5
112
97
95.0
GMCB150
122
24.5
112
97
95.0
GMHB160
160
32.0
148
129
95.0
GMCB200
160
32.0
148
129
95.0
(1) 1000 Btu/hr (British Thermal Units Per Hour)
(2) Heating Capacity and AFUE (Annual Fuel Utilization Efficiency) are based on DOE (Department of Energy) test
procedures.
(3) Net AHRI Ratings based on piping and pickup allowance of 1.15. Contact Technical Support before selecting boiler
for installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping
systems, etc.
*Max CH Supply temp 176° F (80°C)
Item
GMCB150
GMCB200
Input Ratings (MBH)
Min
24.5
32
Max
147
200
Output Ratings (MBH)
Min
21
28
Max
133
175
Domestic Water Pressure
2.9 psi (0.2 bar) - 116 psi (8.0 bar)
Minimum Flow Rate
0.50 GPM
Maximum Flow Rate
3.5 gpm
5.0 GPM
Flow Rate 77°F (43°C) Temp. Rise
3.2 GPM
4.5 GPM
DHW Supply Connection Size
3/4"NPT
3/4"NPT
Cold Water Input Connection Size
3/4"
3/4"
12.2 Domestic Hot Water Specifications
*Max DHW temp 140° F (60° C)
12.1 Ratings and Capacities
• Constructed and hydrostatically tested for maximum allowable working pressure of 50 psig (pounds per square inch gauge)
(115 kPa) in accordance with ASME Boiler and Pressure Vessel Code, Section IV, Rules for Construction of Heating Boilers.
• In USA,
for elevations beyond 2,000-ft reduce input by 4% for each 1,000-ft above sea level in accordance with National
Installation Code ANSI Z223.1
• In Canada,
input rate is reduced by 10% for elevations 2,000-ft to 4,500-ft. Contact Provincial Authority having jurisdiction
for Installations above 4500-ft (1350m) above sea level.
PN 240012363 REV. A [08/31/2018]
