Ratings And Capacities; Ratings And Capacity; Domestic Hot Water Specifications; High Altitude Ratings And Capacity - UTICA BOILERS MAHF-125 Installation, Operation & Maintenance Manual

12 TECHNICAL DATA

12.1 Ratings and Capacity

Model
Number
MAHF-125
MACF-150
(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)

12.2 Domestic Hot Water Specifications

12.3 High Altitude Ratings and Capacity

For elevations between 2000 ft (600 m) and 10,000 ft (3048 m), use the following information:
Altitude
MAHF-125
2,000-4,500 ft
(600m-1350m)
MACF-150
Max CH Supply temp 176° F (80° C) for MAHF-125 and MACF-150
*
Max DHW temp 140° F (60° C)
*

12.4 High Altitude Chart

Parameter
P71
High Fire
Fan Speed
Parameter
P72
Low Fire
Fan Speed

12 - RATINGS AND CAPACITIES

CH Input, MBH
Maximum
125
125
Item
Input Ratings (MBH)
Output Ratings (MBH)
Domestic Water Pressure
Minimum Flow Rate
Maximum Flow Rate
Flow Rate 77°F (43°C) Temp. Rise
DHW Supply Connection Size
Cold Water Input Connection Size
*Max DHW temp 140° F (60° C)
Input, MBH (KW)
Model
Number
Maximum Minimum
113
113
GAS
Model
0-2,000 ft.
[0-610 m]
Setting 115
125
RPM 6150
Setting 220
150
RPM 7200
Setting
125
RPM
Setting
150
RPM
(1)
Heating
(1)(2) CH
Capacity, MBH *
Minimum
22 113
22 113
Min
Max
Min
Max
2.9 psi (0.2 bar) - 116 psi (8.0 bar)
Heating
AFUE, %
Capacity,
MBH*
22 101 95.0
22 101 95.0
Natural
2,000- 10,000 ft
[610-3,048 m]
60
5600
170
6700
40
1150
40
1150
CO Limit < 200 ppm
51
Net AHRI
(1)(3)
Rating Water, MBH
98
98
MACF-150
22
153
19
136
0.50 GPM
3.50 gpm
3.25 gpm
1/2" Sweat
1/2"Sweat
Domestic Hot Water (DHW) Circuit
Max Input, Min Input,
MBH MBH
137 22
**MACF-150 Max DHW Flow rate 3.5 gpm (13.2 l/min)
LP
Altitude
0-2,000 ft.
[0-610 m]
65
5650
170
6700
25
1000
25
1000
240012565 REV A, [05/15/2019]
AFUE%
(2)
95.0
95.0
**
Max Output, Min Output,
MBH MBH
122 19
2,000- 10,000 ft
[610-3,048 m]
40
5400
150
6500