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Part number 550-142-085/0712
WM97+
gas
-
fired
water
boiler
—
Boiler Manual
– 130 –
Figure 133
Ratings and engineering data — multiple WM97+ boilers
DOE
Boilers in
system
Model WM97+
Total
CSA input
CSA
Output /
DOE
Heating
capacity
Boiler
H.P.
Net water
ratings
Manifolded
combustion
air duct
size
Input,
MBH
Output,
MBH
-
MBH
Square
inches
70 110 155
-
Note 1
-
Note 2
Figure 60, page 54
2
140
130
3.9
114
70
2
220
202
6.0
176
110
2
310
286
8.5
248
155
3
210
195
5.8
171
105
3
330
303
9.1
264
165
3
465
429
12.8
372
233
4
280
260
7.8
228
140
4
440
404
12.1
352
220
4
620
572
17.1
496
310
5
350
325
9.7
285
175
5
550
505
15.1
440
275
5
775
715
21.4
620
388
6
420
390
11.7
342
210
6
660
606
18.1
528
330
6
930
858
25.6
744
465
7
490
455
13.6
399
245
7
770
707
21.1
616
385
7
1085
1001
29.9
868
543
8
560
520
15.5
456
280
8
880
808
24.1
704
440
8
1240
1144
34.2
992
620
Boiler
Model
WM97+
Shipping
weight
Operating
weight
Water
content
Water flow rate
per boiler
Vent/air pipe
size:
(Provide a
separate
vent for each
boiler)
Electrical
service
required
Pounds
per boiler
Pounds
per boiler
Gallons
per boiler
GPM
@ 20°F
rise
GPM
@ 40°F
rise
Amps
per boiler
Note 4
Note 5
Note 3
70
136
140
2.8
6.5
3.3
2” or 3”
15.0
110
136
140
2.8
10.0
5.0
2” or 3”
15.0
155
162
150
3.4
14.3
7.2
3”
15.0
Ratings — Multiple WM97+ boilers
Notes
1
Based on standard test procedures outlined by
DOE for individual boilers.
2
Net I=B=R ratings are based on piping and
pickup allowance of 1.15.
Consult Weil-McLain Technical Services for
other allowances.
3
Total amp requirement includes up to three
circulators, not exceeding 2.2 amps per
circulator.
4
Operating weight is the total weight of the
boiler, including water.
5
WM97+70 or 110 vent/air pipes can be either
2” or 3” pipe.
WM97+155 vent/air pipes must be 3”.
All of the boilers will automatically de-rate
as vent/air pipe length increases, due to
the pressure loss through the piping. See
Figure 132, page 129 for details.
All WM97+ installations require a separate
vent pipe and termination for each boiler.
Vent piping cannot be manifolded
. Install
and terminate vents as described in vent/air
installation instructions in this manual.
Combustion air piping can be individually
piped or manifolded. See Figure 60, page 54,
for manifolded air piping.
Содержание WM97+110
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