Boiler Ratings & Capacities - Dunkirk Q90-200 Installation, Operation & Maintenance Manual

Figure 1 -Boiler Jackets
Input
Model
(MBH)
125 125
150 150
175 175
200 200
(1) 1 MBH = 1,000 Btuh (British Th ermal Units Per Hour)
(2) AFUE (Annual Fuel Utilization Effi ciency) and Heating Capacity is based on Department of Energy test procedure.
Ratings shown are for sea level applications. The boiler automatically de-rates input as
altitude increases. No alterations to boiler are required for altitudes above sea level.
Nominal Input
Altitude
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
BOILER RATINGS & CAPACITIES
TABLE #1 - SEA LEVEL RATINGS (NATURAL AND PROPANE GASES)
Heating Capacity
(1) (1)(2)
(MBH)
113
134
158
180
200,000
Vent Lengths
Min Max
200,000 200,000
197,000 196,500
194,000 193,000
191,000 189,500
188,000 186,000
185,000 182,500
182,000 179,000
179,000 175,500
176,000 172,000
173,000 168,500
170,000 165,000
Net I=B=R Rating
(1)
(MBH)
98
117
137
157
TABLE #2 - NATURAL GAS
175,000
Vent Lengths
Min. Max
175,000 175,000
172,400 172,200
169,800 169,400
167,200 166,600
164,600 163,800
162,000 161,000
159,400 158,200
156,800 155,400
154,200 152,600
151,600 149,800
149,000 147,000
4
Shipping AFUE
(2)
Weight (lbs.)
284 90.0
284 90.0
284 90.0
284 90.0
150,000
Vent Lengths
Min. Max
150,000 150,000
147,800 147,400
145,600 144,800
143,400 142,200
141,200 139,600
139,000 137,000
136,800 134,400
134,600 131,800
132,400 129,200
130,200 126,600
128,000 124,000
Flue Diameter
2" CPVC & 3" PVC
2" CPVC & 3" PVC
2" CPVC & 3" PVC
2" CPVC & 3" PVC
125,000
Vent Lengths
Min. Max
125,000 125,000
123,500 123,000
122,000 121,000
120,500 119,000
119,000 117,000
117,500 115,000
116,000 113,000
114,500 111,000
113,000 109,000
111,500 107,000
110,000 105,000