High Altitude Ratings; High Altitude Chart - UTICA BOILERS MAH-100 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-100
MAC-115
MAH-125
2,000-4,500 ft
(600m-1350m)
MAC-150
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)
*
Above 2000 ft. (610m) boiler will derate by 4% for each 1,000 ft (305M) of altitude gain.

12.4 High Altitude Chart

100
115
Parameter
125
P71
High Fire
150
Fan Speed
165
205
100
115
Parameter
125
P72
Low Fire
150
Fan Speed
165
205
12 - RATINGS AND CAPACITIES
Input, MBH (KW)
Capacity,
Maximum Minimum
88.8 16.5
88.8 16.5
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 85
RPM 5,350
Setting 220
RPM 7,200
Setting 115
RPM 6150
Setting 220
RPM 7200
Setting
RPM
Setting
RPM
Setting
RPM
Setting
RPM
Setting
RPM
Setting
RPM
Setting 43
RPM 1180
Setting 40
RPM 1150
CO Limit < 200 ppm
Heating
AFUE, %
Max Input,
MBH*
MBH
81.1 95.0
81.1 95.0 109.7
101 95.0
101 95.0 137
137 95.0
137 95.0 184.5
126 95.0
126 95.0 168
105 95.0
105 95.0 141
**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)
**
Natural
Altitude
2,000- 10,000 ft
[610-3,048 m]
75
5,250
190
6,900
60
5600
170
6700
105
6050
225
7250
50
1,250
55
1,300
40
1150
40
1150
60
1350
60
1350
65
Domestic Hot Water (DHW) Circuit
Min Input, Max Output,
MBH MBH
16.6 100.2
22 122
26.5 157
24.1 143
20.3 120
LP
0-2,000 ft. 2,000- 10,000 ft
[0-610 m] [610-3,048 m]
85 75
5350 5250
220 190
7,200 6,900
65 40
5650 5400
170 150
6700 6500
120
6200
220
7200
70
1450
55
1,300
25
1000
25
1000
45 60
1200 1350
45 60
1200 1350
240013354 REV B [09/15/2021]
**
Min Output,
MBH
15.3
19
23
20
17