
lp-83 Rev. 006 Rel. 005 Date 12.18.17
7
PRODUCT LINE CONSISTS OF VARIOUS MODELS AVAILABLE IN
DIFFERENT SIZES
CALL THE FACTORY FOR PRODUCT AND WARRANTY INFORMATION
“DW” (Double Wall Commercial Heat Exchanger) Models are available
in 45, 60, 80, and 119 US Gallon Sizes.
“C” (Commercial) Models with Two Heat Exchangers for dual systems
and commercial applications. Use one coil for a wood boiler, the
other for a solar system, etc. Models available in 45, 60, 80, and 119
US Gallon Sizes.
DETERMINE THE AMOUNT OF DOMESTIC HOT WATER NEEDED. THEN
USE THE TABLE BELOW TO OPTIMIZE WATER HEATER AND BOILER
SIZING.
NOTE:
FIRST DRAW AT 140
o
F AT 90
o
F Δ T. (FOR PERFORMANCE AT
115
o
F, MULTIPLY BY 1.56 FOR MINUTES OF WATER DRAW.)
LINE A GALLONS:
LOW MASS BOILERS THAT TAKE LESS THAN 90
SECONDS TO HEAT TO TEMPERATURE.
LINE B GALLONS:
HIGH MASS BOILERS THAT TAKE GREATER THAN 90
SECONDS TO HEAT TO TEMPERATURE.
MODEL
GROSS OUTPUT (x 1,000 BTU/HR)
40
60
84
100
120
140
160
180
200
220
240
260
280
300
320
SSU-20
A
73
112
152
-
B
53
81
110
-
SSU-30
A
83
125
160
193
-
B
60
90
115
140
-
SSU-30LB
A
84
128
166
213
-
B
60
92
120
154
-
SSU-45
A
94
138
180
210
242
-
B
68
100
130
152
175
-
SSU-60
A
-
221
244
251
258
266
287
305
-
B
-
160
176
181
186
192
207
220
-
SSU-80
A
-
297
305
314
367
424
489
503
-
B
-
216
223
230
269
311
359
370
-
SSU-119
A
-
333
384
444
457
470
543
627
645
B
-
216
251
290
335
345
399
460
474
C. Reduced Boiler Input Sizing Guide
NOTE:
IT IS NOT RECOMMENDED TO REDUCE BOILER INPUT WHEN USING DOUBLE WALL TANKS.
Table 4 - Describes Cold Start First Hour Ratings (A and B) and Boiler Size
MODEL
2 GPM
2.5 GPM
3 GPM
3.5 GPM
4 GPM
4.5 GPM
5 GPM
SSU-20
A
9.5
8
7
5.5
4.5
4
3.5
B
8.5
7.5
6.5
5
4
3.5
3
SSU-30
A
16
13
10
7.5
6
5.5
5
B
14
12
9
7
5.5
5
4.5
SSU-30LB
A
18
14
12
9
6.5
6
5.5
B
17
12
10
8
6
5.5
5
SSU-45
A
23
18
14
11
8.5
7.5
7
B
18
15
13
10
7.5
7.5
6.5
SSU-45C
A
∞
∞
∞
29
20
17
14
B
45
24
26
18
16
13
10
SSU-60
A
∞
∞
∞
∞
36
30
22
B
29
19
12
SSU-60C
A
∞
∞
∞
∞
∞
46
29
B
30
21
SSU-80
A
B
∞
∞
∞
∞
∞
∞
∞
SSU-80C
A
B
∞
∞
∞
∞
∞
∞
∞
SSU-119
A
B
∞
∞
∞
∞
∞
∞
∞
SSU-119C
A
B
∞
∞
∞
∞
∞
∞
∞
Table 5 - NOTE: THIS INFORMATION IS BASED ON BOILER SIZE CONFORMING TO THE MINIMUM BTU/H REQUIRED TO ACHIEVE FIRST HOUR RATINGS,
OBTAINABLE FROM FIRST HOUR RATING TABLE. ∞ - Indicates continuous duty.