Product Overview

Model Specific Information
Meet or exceed ASHRAE 90.1b (current standard)
Model
Number
Approx.
Shipping
Weight
lbs.
A
Floor to
Heater
Top
in.
C
Floor to
T&P
Conn.
in.
B
Jacket
Dia.
in.
Capacity
LS-SW-2-30-L
LS-SW-2-40R-L
LS-SW-2-50R-L
LS-SW-2-65-L
LS-SW-2-80-L
LS-SW-2-120-L
U.S.
Gal.
30
38
48
60
75
116
Imp.
Gal.
25
32
40
50
62
97
33
5
/ 8
41
1
/ 8
46
1
/ 4
59
1
/ 4
59
62
1
/ 2
28
1
/ 4
34
3
/ 8
40
1
/ 8
53
1
/ 8
52
7
/ 8
55
3
/ 4
140
172
180
196
224
355
22
22
22
22
24
28
1
/ 4
E
Floor to
Exchanger
Outlet
in.
5
3
/ 8
5
3
/ 8
5
3
/ 8
5
3
/ 8
5
3
/ 8
6
3
/ 8
27
1
/ 2
27
1
/ 2
27
1
/ 2
27
1
/ 2
27
1
/ 2
28
1
/ 2
34
3
/ 8
41
7
/ 8
47
60
59
3
/ 4
63
1
/ 4
D
Floor to
Water
Conn.
in.
Model
Number
Approx.
Shipping
Weight
kg.
A
Floor to
Heater
Top
cm.
C
Floor to
T&P
Conn.
cm.
B
Jacket
Dia.
cm.
Capacity
LS-SW-2-30-L
LS-SW-2-40R-L
LS-SW-2-50R-L
LS-SW-2-65-L
LS-SW-2-80-L
LS-SW-2-120-L
Liters
114
143
182
227
284
439
85
104
112
151
150
159
72
87
102
135
134
142
64
77
82
89
102
161
56
56
56
56
61
72
E
Floor to
Exchanger
Outlet
cm.
14
14
14
14
14
16
F
Floor to
Exchanger
Inlet
in.
F
Floor to
Exchanger
Inlet
cm.
70
70
70
70
70
72
11
1
/ 2
11
1
/ 2
11
1
/ 2
11
1
/ 2
11
1
/ 2
11
1
/ 2
G
Floor to
Aquastat
in.
G
Floor to
Aquastat
cm.
30
30
30
30
30
30
87
106
119
152
152
161
D
Floor to
Water
Conn.
cm.
Residential LAARS-STOR
TM
Indirect Water Heater
General
All units are certified at 300 PSI (2068 kPa) test pressure
and 150 PSI (1034 kPa) working pressure. All potable water connections are 3/4" (19mm) NPT on 8" (203mm) centers.
Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.
Suitable for Water (Potable) Heating and Space Heating.
Toxic chemicals, such as those used for boiler treatment, shall NEVER be introduced into the potable side of this system. The potable side may NEVER be
connected to any existing heating system or component(s) previously used with a non-potable water heating appliance.
Based on 200°F boiler water temperature and 50°F
potable water inlet.
Model
Number
140°F 115°F
DOE Water Heater Performance
LS-SW-2-30-L
LS-SW-2-40R-L
LS-SW-2-50R-L
LS-SW-2-65-L
LS-SW-2-80-L
LS-SW-2-120-L
Maximum First
Hour Rating
(Gal.) @
279
288
297
306
321
357
429
438
447
456
470
507
140°F 115°F
4.2
4.2
4.2
4.2
4.2
4.2
6.7
6.7
6.7
6.7
6.7
6.7
Continuous
Draw Rating
(Gal./Min.) @
Approximate
Boiler Output
Needed for
Ratings (BTU/H
220,000
220,000
220,000
220,000
220,000
220,000
Model
Number
I=B=R Water Heater Ratings
LS-SW-2-30-L
LS-SW-2-40R-L
LS-SW-2-50R-L
LS-SW-2-65-L
LS-SW-2-80-L
LS-SW-2-120-L
First Hour
Delivery
@ 135°F
(Gal.)
255
260
265
275
295
325
Continuous
Draw Rating
@ 135°F
(Gal./Hr.)
235
235
235
235
235
235
Standby
Heat Loss
Rating
(°F/Hr.)
1.2
1.1
0.9
0.8
0.6
0.4
Minimum
Heat Source
Flow Rate
(Gal./Min.)
13.7
13.7
13.7
13.7
13.7
13.7
Minimum
Output Rate
of Heat Source
(BTU/Hr.)
157,000
157,000
157,000
157,000
157,000
157,000
D
A
F
E
G
C
B
D
A
F
E
G
C
B
POTABLE
CONNECTIONS
ANODE RODS
(TYPICAL)
(TYPICAL)
These certified ratings were obtained with a heat source output
rate and flow rate as specified and a 180°F boiler water supply
temperature. Other results will be obtained under different
conditions.
800.900.9276 • Fax [phone] (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax [phone] (Applications Engineering)
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax [phone]
www.Laars.com
Litho in U.S.A. © Laars Heating Systems 0908 Document 11005B
22669_laars_11005b.qxp 8/14/09 10:51 AM Page 2