Model GL indirect-fired water heaters — Product Manual
Ratings with 200°F boiler supply water
For water heater to achieve the rated performance below: Boiler water must be supplied to the water heater at 200°F,
and the boiler water flow rate must be no less than given in the tables below. (For GWC boiler applications, with
supply water at 190°F, see the ratings in the boiler manual.)
Boiler
Heating
Capacity
MBH
First Hour Rating Capacity (GPH) — Boiler Water Supply at 200°F
DHW
temps
GL–
32
Boiler
Water
Min GPM &
Head Loss
GL–
42
Boiler
Water
Min GPM &
Head Loss
GL–
53
Boiler
Water
Min GPM &
Head Loss
GL–
80
Boiler
Water
Min GPM &
Head Loss
GL–
105
Boiler
Water
Min GPM &
Head Loss
DHW 50°F to 140°F
96
8 GPM
minimum
@
1.6 ft wc
98
8 GPM
minimum
@
1.6 ft wc
113
8 GPM
minimum
@
2.9 ft wc
136
14 GPM
minimum
@
4.2 ft wc
147
14 GPM
minimum
@
6.6 ft wc
123 125 140 163 174
150 152 167 190 201
161 179 194 217 228
161 196 221 244 255
161 196 225 267 282
161 196 225 267 308
161 196 225 267 335
161 196 225 267 362
161 196 225 267 372
161 196 225 267 372
161 196 225 267 372
161 196 225 267 372
161 196 225 267 372
161 196 225 267 372
DHW 50°F to 115°F
122
8 GPM
minimum
@
1.6 ft wc
124
8 GPM
minimum
@
1.6 ft wc
139
8 GPM
minimum
@
2.9 ft wc
162
14 GPM
minimum
@
4.2 ft wc
173
14 GPM
minimum
@
6.6 ft wc
160 161 177 200 210
197 198 214 237 247
234 236 251 274 285
239 273 288 311 322
239 292 326 349 359
239 292 329 384 396
239 292 329 384 434
239 292 329 384 471
239 292 329 384 543
239 292 329 384 543
239 292 329 384 543
239 292 329 384 543
239 292 329 384 543
239 292 329 384 543
Part number GL-E224-ADOC 0413
41
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