Hydrastone-lined Indirect Water Heater
• Seamless Hydrastone-lined Tank
• Very Low Standby Heat Loss
• Easy Installation & Servicing
• 5 Sizes Available - 27, 35, 50, 70 & 119
• Proprietary TPI Thermostat Control Included
• Optional Lifetime Warranty Available
A great option for use with any Burnham
boiler for abundant domestic hot water.
Burnham Alliance SL™
Indirect-fired Water Heater
There can be extensive demands for domestic (potable) hot water in both residential and
commercial applications. Hydrastone-lined Alliance SL indirect-fired water heaters meet
the needs for domestic hot water with a unique design and uncompromised reliability.
How an Indirect Water Heater Works
Indirect water heaters utilize the power and large heating capacity of a boiler to provide
year-round hot water at low operating costs.
5 Sizes Available
The hydrastone-lining provides
a protective barrier between the
domestic hot water and the steel
tank. This rugged tank desing
works well in a wide range of
water conditions and operating
temperatures.
Alliance SL water heaters have a higher recovery rate than typical direct fired or
electrically operated water heaters because they utilize the large output from the boiler
as the heat source.
A Diverse Offering
To meet the needs of virtually any residential or commercial application Alliance SL
water heaters are available in five sizes: 27, 35, 50, 70 and 119. Whether it is a
three-story house or a 30-story apartment building, Burnham has the right size
Alliance SL for the job.
Benefits of Installing an Alliance SL
Easy Installation
The coil comes installed and can be easily turned to line up with the boiler and domestic
water piping on replacement installations. (The AL119SL coil is shipped separately).
Easy Service
All connections are located on the top of the tank and all of the controls are located on
the front of the tank for easy service and installation. The heat exchanger can be removed
without having to drain the tank. (The AL119SL utilizes a side mounted coil).
Unique10/2/1 Warranty
A 10-year full tank replacement, two-year labor and one year on parts, which include the
coil, come with every Alliance SL. An optional lifetime warranty is also available.
Top mount removable heat exchanger
with double o-ring design for easy
installation and service and eliminates
the need for welds between the piping
and the tank.
Hydrastone-lining protects
effectively against corrosion.
Unique cold water
diffuser to increase
output by 20 percent.
Alliance SL
27, 35, 50 & 70
™
Two to three inches of polyurethane
foam insulation combined with the
stone lining resulting in extremely
low standby heat loss.
Larger coil diameter and spacing
designed and positioned for maximum
heating output and minimizes build-up.
Proprietary TPI
control accurately
controls the output
water temperature
and helps eliminate
tank “overload.”
Heavy gauge steel
helps increase
integrity of the tanks
Note: No anode rod required
The Alliance model AL119SL
utilizes a side mounted coil
that is supplied separately.
Hydrastone-lining
The concept of stone-lined water tanks is not a new one, and has been proving successful against corrosion for ages.
Many of the stone-lined tanks are installed are 25-30 years old. In fact, the New England area has been using stone-lined
tanks for years due to their water supply being very acidic and has been devastating to glass lined tanks.
What makes the Alliance SL unique is the Hydrastone-lining. This one half inch lining protects the steel tank from
the corrosive action of water. When the water first enters the tank, it is absorbed into the Hydrastone-lining permanently.
This water loses its oxygen and becomes inert, non-corrosive water which then acts as a protective wall between the hot
water and steel tank. This unique process and design makes Alliance SL water heaters a great choice for domestic hot
water applications.
Ratings
Maximum
Model
Number
AL27SL
AL35SL
AL50SL
AL70SL
AL119SL*
1. First flow ratings are based on 58°F inlet water, 135°F hot water and 180°F boiler supply water.
2. The above ratings were obtained at the boiler outputs (in MBtu/hr.) shown in column (4) at the boiler water flow rates (in GPM) shown in
column (5). Other results will be obtained under different conditions.
* Note: The AL119SL utilizes a side mounted coil that is shipped seprately.
First Hour Rating at
135°F (gal./hr.)
192
200
225
294
339
Continuous Draw
Rating at 135°F
(gal./hr.)
162
162
171
217
235
Standby
Loss
(°F/hr.)
0.97
0.72
0.56
0.45
0.39
Minimum
Boiler Output
(MBtu/hr.)
99
99
110
120
149
Boiler Water
Flow Rate
(gal./min.)
6
6
6
6
14
Pressure Drop
through Coil
(ft. w.c.)
10.0
17.0
Specifications
Approximate
Model
Number
AL27SL
AL35SL
AL50SL
AL70SL
AL119SL
Storage
Capacity
(gal.)
27
35
50
70
119
Height
Dim. ‘A’
(in.)
39-1/4
39-1/4
40-3/4
45-3/4
67-3/4
Diameter
Dim. ‘C’
(in.)
20
22-3/4
26
28
28
Maximum Allowable
Working Pressure
150 PSI
150 PSI
150 PSI
150 PSI
150 PSI
Shipping
Weight
(lbs.)
170
198
248
300
480
9.0
9.0
9.5
Alliance 27, 35, 50 & 70
The AL119SL uses 1.0”M coil connections
for input/ouput to boiler and 3/4”M for hot
water inlet/outlet on side of tank.
Form No. PL81401081002-5/07-20Ms
© 2007 U.S. Boiler Company, Inc. - Lancaster, PA
Phone: 1-888-432-8887
www.burnham.com Printed in the U.S.A.
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