High Altitude Ratings; High Altitude Chart - ECR International Utica Boilers MAH-125 Installation, Operation And Maintenance Manual

12.3 High Altitude Ratings

For elevations between 2000 ft (600 m) and 10,000 ft (3048 m), use the following information:
Model
Altitude
Number
MAH-125
MAC-150
2,000-4,500 ft
(600m-1350m)
MAH-165
MAC-205
MAH-165
4,501-6,500 ft
(1372 m -1981 m)
MAC-205
MAH-165
6,501-10,000 ft
(1982 m -3048 m)
MAC-205
Max CH Supply temp 176° F (80° C) for MAH-125 and MAC-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
Input, MBH (KW)
Maximum Minimum
113 22
113 22
147 26.5
147 26.5
135 24.1
135 24.1
113 20.3
113 20.3
GAS
Model
0-2,000 ft.
[0-610 m]
Setting
125
RPM
Setting
150
RPM
Setting
165
RPM
Setting
205
RPM
Setting
125
RPM
Setting
150
RPM
Setting
165
RPM
Setting
205
RPM
Heating
AFUE, %
Capacity,
MBH*
101 95.0
101 95.0
137 95.0
137 95.0
126 95.0
126 95.0
105 95.0
105 95.0
Natural
2,000- 10,000 ft
[610-3,048 m]
115 60
6150 5600
220 170
7200 6700
105
6050
225
7250
40
1150
40
1150
43 60
1180 1350
40 60
1150 1350
CO Limit < 200 ppm
57
Domestic Hot Water (DHW) Circuit
Max Input, Min Input,
MBH MBH
137 22
184.5 26.5
168 24.1
141 20.3
**MAC-150 Max DHW Flow rate 3.5 gpm (13.2 l/min)
MAC-205 Max DHW flow rate 5.0 gpm (18.9 L/min)
**
LP
Altitude
0-2,000 ft.
[0-610 m]
65
5650
170
6700
120
6200
220
7200
25
1000
25
1000
45
1200
45
1200
240011941 REV G, [06/30/2019]
**
Max Output, Min Output,
MBH MBH
122 19
157 23
143 20
120 17
2,000- 10,000 ft
[610-3,048 m]
40
5400
150
6500
60
1350
60
1350