Brochure

LAARS-STOR2
™
RESIDENTIAL ENERGY SAVER
DOUBLE-WALL INDIRECT WATER HEATER
The Laars-Stor2
™
features a patented double-wall carbon steel heat exchanger coil
coated with a glass-lining for corrosion resistance and long life. The Laars-Stor2
™
supplies
a first hour rating of 120 to 158 gallons per hour.
• Heat Exchanger—Double wall 1
1
⁄2" O.D. glass
coated steel coil. Because the double wall coil
has a positive leak path, the hydronic fluid will
stay separate from the potable water.
• Low Heat Exchanger Head Loss—Up to 10
GPM flow, with less than 5 ft. of head loss.
Greatly reduces the required pump size for heat
exchange.
• Factory Installed Sediment Reduction
System—Cold water inlet sediment reducing
device. Helps prevent sediment build-up in tank.
Increases first hour delivery of hot water while
minimizing temperature build-up at top of tank.
• Glass Lined Tank—Laars Heating Systems
water heater tanks are
protected from the corrosive
effects of hot water by an
exclusive ceramic porcelain-
like coating.
• Fully Automatic Controls—
Fast acting surface–mount
thermostat for automatic
temperature control.
• Water Connections—
3
⁄4" NPT factory installed
true dielectric fittings. Extends water heater life
and eases installation.
• 2" Non-CFC Foam Insulation—Covers the sides
and top of tank to save energy by retarding
loss of heat. Also increases jacket rigidity.
• Two Protective Aluminum Rods—Provides
added protection against corrosion for long
trouble-free service.
• Supply and Return Connections—The
3
⁄4" NPT
female connections are located on the front for
both the boiler supply and boiler return.
• Stand-by Heat Loss—Less than
1
⁄2°F per hour
(ASHRAE 90.1b current standard).
• Brass Drain Valve.
• T&P Relief Valve Included—
All models feature opening on
side of tank.
• Steel Tank—Heavy gauge steel
automatically formed, rolled
and welded to assure a
continuous seam for glass
lining.
B
D
A
F
E
C
G
POTABLE WATER FITTINGS - 3/4" NPT
ANODES
COLD WATER INLET
HOT WATER INLET
TEMPERATURE AND
PRESSURE RELIEF VALVE
FROM BOILER SUPPLY
3/4" NPT
TO BOILER RETURN
3/4" NPT
DRAIN COUPLING - 3/4" NPT
SURFACE MOUNTED
THERMOSTAT
General: All units are certified at 300 PSI test pressure (2068 kPa) and 150 PSI working pressure (1034 kPa). All potable water and heat exchanger connections are
3
⁄4" NPT (19mm) 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 water side. The potable side of this unit may NEVER be connected to any existing heating
system or component(s) previously used with a non-potable water heating appliance. The heat exchanger side of the unit may be used in space heating applications.
Notes: 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.
Meets or exceeds the insulating standards established under ASHRAE Standard 90.1b (current edition).
Notes: Based on 200°F boiler water temperature and
50°F potable water inlet temperature.
Model
Water Heater RatingsAHRI
LS-DW-2-40-L
LS-DW-2-50-L
LS-DW-2-65-L
LS-DW-2-80-L
Model
LS-DW-2-40-L
LS-DW-2-50-L
LS-DW-2-65-L
LS-DW-2-80-L
First Hour
Rating
@ 135°F
(Gal/Hr.)
123
133
148
158
Continuous
Draw Rating
@ 135°F
(Gal/Hr.)
98
98
98
98
Standby
Heat Loss
Rating
(°F/Hr.)
1.1
0.9
0.7
0.6
Minimum
Heat Req.
Rate
(BTU/Hr.)
65,000
65,000
65,000
65,000
Minimum
Heat Source
Flow Rate
(Gal/Min.)
8.0
8.0
8.0
8.0
140°F 115°F
Water Heater PerformanceDOE
Maximum First
Hour Rating
(Gal/Hr.) @
80
87
96
106
122
129
138
148
140°F 115°F
Continuous
Draw Rating
(Gal/Min.) @
Approximate Boiler
Output Needed
For Ratings
(BTU/Hr.)
0.9
0.9
0.9
0.9
1.6
1.6
1.6
1.6
55,000
55,000
55,000
55,000
Heat Exchanger Head Loss
GPM
2
trace
5
0.4
8
2.3
10
4.6
12
6.9
Ft. of Hd. Loss
144
182
242
284
38
48
64
75
LS-DW-2-40-L
LS-DW-2-50-L
LS-DW-2-65-L
LS-DW-2-80-L
41
46
1
/4
59
59
104
117
150
150
56
56
56
61
87
102
135
134
22
22
22
24
34
3
/8
40
1
/8
53
1
/8
52
7
/8
108
120
153
152
14
14
14
14
41
7
/8
47
1
/4
60
59
3
/4
170
180
196
224
76
89
89
102
11
1
/2
11
1
/2
11
1
/2
11
1
/2
5
3
/8
5
3
/8
5
3
/8
5
3
/8
70
70
70
70
29
29
29
29
27
1
/2
27
1
/2
27
1
/2
27
1
/2
Residential Laars-Stor2
™
C
Floor to
T&P Conn.
in. cm.
D
Floor to
Water Conn.
in. cm.
B
Jacket
Diameter
in. cm.
A
Floor to
Heater Top
in. cm.Liters
U.S.
Gal.
Capacity
32
40
54
63
Imp.
Gal.
Model
Number
E
Floor to
Boiler Outlet
in. cm.
F
Floor to
Boiler Inlet
in. cm.
G
Floor to
Thermostat
in. cm.
Shipping Weight
Approx.
lbs. kg.