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104362-08 - 1/23

Alliance SL

Installation, Operating & Service Instructions

U.S. Boiler Company, Inc. (hereinafter called the “Company”) offers the following 

Limited Tank Replacement Warranty, Limited Tank Replacement Labor Allowance, 

and Limited Parts Warranty to the original purchaser/owner of this Alliance SL 

or Alliance LT indirect-fired water heater.  These warranties are not transferable 

beyond the original purchaser/owner, and are not valid if the tank is removed from 

initial installation site. The Company reserves the right to require proof of purchase 

and inspection and/or testing of tank as a condition of these warranties.

TEN (10) YEAR LIMITED TANK REPLACEMENT WARRANTY DURATION:

1.

STANDARD DURATION:

 Ten (10) years from the date of manufacture as

indicated by the serial number.

2.

OPTIONAL LIFETIME DURATION: 

Available to residential, single family homes

only (excludes AL119SL, AL70CSL, AL80CLT, and AL119CLT) for as long as

the original purchaser owns the home in which the Alliance SL or Alliance LT

was originally installed. Optional Lifetime replacement Warranty is not effective

unless U.S. Boiler Company, Inc. receives completed registration card and

payment within 30 days of purchase (please see back cover of product manual

for details).

IF NO CARD IS RETURNED OR PAYMENT RECEIVED, THE REPLACEMENT

WARRANTY WILL BE THE STANDARD 10-YEAR WARRANTY AND WILL BEGIN

FROM THE MANUFACTURED DATE INDICATED BY THE SERIAL NUMBER ON

THE ALLIANCE SL WATER HEATER.

COVERAGE:

 Replacement warranty covers only the storage tank for leaks caused 

by the corrosive effects of water under normal and proper use. Subject to prior 

Company approval.

COMPANY OBLIGATION:

 Repair of the original tank or replacement of the 

entire heater with a new comparable model is at the option of the Company 

and constitutes the fulfillment of ALL obligations of the Company hereunder. In 

replacing or repairing the Alliance SL or Alliance LT water heater, the Company 

reserves the right to make such changes in details of design, construction or 

material as shall in their judgment constitute an improvement of former practices.

REPLACEMENT:

 When a replacement is made under the terms of this warranty, the 

replacement unit will have a warranty of replacement and labor allowance only for 

the remaining time under the original warranty.  The Company reserves the right to 

require the return of the defective unit at the expense of the purchaser.

LIMITATION:

 The duration of the tank replacement warranty on the tank assembly 

shall be reduced to a period of five years if (1) the purchaser is a business, 

partnership or corporation, or if (2) the Alliance SL or Alliance LT water heater is 

used for a commercial, institutional, industrial, non-residential or multi-application, 

or (3) if the covered tank model is an AL119SL, AL70CSL, AL80CLT, or AL119CLT 

water heater, as these models are configured as commercial tanks and will always 

follow commercial warranty terms. All repairs or replacements will be made F.O.B. 

the Company. The purchaser must pay for transportation service, labor, installation, 

administrative fees or other costs involving the repair or replacement of such part.

YOUR ACTION: 

When you discover a defect, immediately notify the dealer from 

whom the heater was purchased. If you cannot locate the dealer, contact the 

Company.

TWO (2) YEAR LIMITED TANK REPLACEMENT LABOR ALLOWANCE:

The Company shall pay up to a maximum of $200, for the labor to exchange a 

tank that is leaking due to the corrosive effects of water within two years from date 

of installation. This labor allowance is for tank replacement only, and not for any 

service work on the heater such as cleaning of the heat exchanger (due to the build-

up of calcium or other minerals or metals), leakage from plumbing connections, 

relief valves, heat exchanger gaskets, thermostats, or any other component of 

the heater. This labor must be performed by a qualified installer. Proof of labor 

costs may be required as a condition of payment of the Tank Replacement Labor 

Allowance.

LIMITATION

: All other repairs or replacements will be made F.O.B the Company.  

The purchaser must pay for all transportation, service, labor, installation, 

administrative fees or other cost involving the repair of replacement of such 

component parts.

YOUR ACTION: 

When you discover a defect, immediately notify the dealer from 

whom the heater was purchased. If you cannot locate the dealer, contact the 

Company.

ONE (1) YEAR LIMITED PARTS WARRANTY:

DURATION:

  The warranty is effective for one (1) year beginning with the date 

of original purchase. This warranty shall begin from the date of manufacture as 

indicated by the serial number.

COVERAGE: 

The warranty covers any component part of the Alliance SL or Alliance 

LT water heater proven to be defective in workmanship or material (subject to prior 

Company approval).

COMPANY OBLIGATION:

 The warranty covers any component of the Alliance SL or 

Alliance LT water heater proven to be defective in workmanship or material.

EXCLUSIONS AND LIMITATIONS:

Limited Warranty and Tank Replacement Warranty are valid only if you comply with 

the following conditions and limitations:

1. The Alliance SL or Alliance LT water heater is correctly installed according to the

installation manual provided with the unit and all applicable local and national 

codes.

2. The unit is operated within the factory calibrated temperature limits and water

pressure not exceeding 150 psi.

3. Any failure or malfunction that does not result from improper or negligent

operation, accident, abuse (including freezing), misuse, unauthorized alteration

or improper maintenance.

4. Any failure or malfunction that does not result from failure to keep the tank full

of potable water, free to circulate at all times; and free of damaging water sedi-

ment or scale deposits. In areas where adverse water conditions are suspected

(i.e. calcium and other minerals), it is essential that the water be tested and

appropriate action be taken to prevent damage to the Alliance SL or Alliance LT

tank. It may be necessary to remove the heat exchanger for cleaning to maintain

maximum performance in poor water areas. Diminished performance due to the

build-up of calcium or other minerals, metals, or deposits on the heat exchanger

is specifically not included in the coverage of these warranties.

5. THE FOREGOING EXPRESS LIMITED WARRANTIES ARE THE ONLY WARRAN-

TIES OF ANY KIND, EITHER EXPRESS OR IMPLIED. THERE ARE NO EXPRESS

OR IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICU-

LAR PURPOSE, PERFORMANCE OR NON-INFRINGEMENT, OR OTHER EXPRESS 

OR IMPLIED WARRANTIES.  EXCEPT FOR THE LIMITED WARRANTIES SET

FORTH HEREIN, THE COMPANY DISCLAIMS ALL OTHER WARRANTIES OR

CONDITIONS, EXPRESS OR IMPLIED, REGARDING THE PRODUCT OR ITS OR

THEIR FITNESS FOR A PARTICULAR PURPOSE OR ITS OR THEIR MERCHANT-

ABILITY. PURCHASER SHALL HAVE SOLE RESPONSIBILITY FOR SELECTING

APPROPRIATE WATER HEATER FOR THE PURCHASER’S NEEDS AND USE

AND THE COMPANY DOES NOT WARRANT THE FITNESS FOR THE WATER

HEATER’S INTENDED USE WITHIN ANY SPECIFIC SYSTEM. THE COMPANY

DOES NOT AUTHORIZE COMPANY REPRESENTATIVES OR OTHER PERSONS

TO VARY THE TERMS OF THE WARRANTIES HEREIN OR TO ASSUME FOR THE

COMPANY ANY OTHER OBLIGATIONS OR LIABILITIES WITH RESPECT TO THIS

PRODUCT.

6. The remedies set forth above shall be the sole and exclusive remedies for breach

of any warranty.

IN NO EVENT SHALL THE COMPANY BE LIABLE FOR ANY INCIDENTAL OR 

CONSEQUENTIAL DAMAGES WHATSOEVER.

Consumer Notifications: The foregoing warranty limitations shall be effective to 

the maximum extent permitted by applicable law, and, to the extent that any such 

limitations would have an unconscionable result or would otherwise be inconsistent 

with applicable law, such provision shall be reformed to the extent necessary to 

avoid such unconscionable result or inconsistency. With respect to the limitations 

on implied warranties set forth above, the Company hereby notifies each person to 

whom such warranty is made as follows: Some states do not allow exclusions of 

such warranties, limitations on how long an implied warranty lasts or the exclusion 

or limitation of incidental or consequential damages, so the above limitations, or 

exclusions, may not apply to you. The limited warranty gives you specific legal 

rights, and you may also have other rights which vary from state to state.

10-2-1

Limited Warranty

For Alliance SL™ and Alliance LT™ Indirect-Fired Water Heaters  

Ten Year Limited Tank Replacement Warranty

Two Year Limited Tank Replacement Labor Allowance

One Year Limited Parts Warranty

U.S. Boiler Company, LLC

P.O. Box 3020, Lancaster PA 17604
Revised 12/22

Summary of Contents for ALLIANCE SL AL27SL

Page 1: ...ructions for future reference Models AL27SL AL35SL AL50SL AL70SL AL70CSL Residential Commercial Manual Contents Page 1 General Information 2 2 Specifications Ratings 3 3 Installation Guidelines 5 4 In...

Page 2: ...e of any hot water system The Company cannot supervise the installation and therefore makes it a specific condition of the warranty that the customer will supervise the installation and use of this pr...

Page 3: ...14 14 0 45 Additional Performance Specifications Based on 50 F inlet water temperature 200 F boiler supply to coil Outputs may vary depending on boiler size boiler water supply temperature flow rate t...

Page 4: ...in Diameter in Shipping Weight lbs Cold Water Inlet Hot Water Outlet To Boiler From Boiler T P Valve AL27SL 39 1 4 20 172 3 4 M 3 4 F 3 4 M 3 4 M 3 4 F AL35SL 39 1 4 22 3 4 185 3 4 M 3 4 F 3 4 M 3 4 M...

Page 5: ...ROTECTION FROM WATER DAMAGE CAUTION All water heaters have a risk of leakage at some unpredictable time IT IS THE CUSTOMER S RESPONSIBILITY TO PROVIDE A CATCH PAN OR OTHER ADEQUATE MEANS SO THAT THE R...

Page 6: ...er location All water supply fittings on this heater are brass do not over tighten or strip threads It is recommended to use a union as per Figures 1 2 and 3 Do not apply heat directly to the cold wat...

Page 7: ...than what is normally expected even if the heater had been flushed prior to this period of inactivity To avoid adverse reactions to this elevated pH the heater MUST be properly flushed and a sample o...

Page 8: ...AND PREPARING THE WATER HEATER Remove the cardboard box which comes packaged with the heater It should contain the following TPI thermostat T P valve and a Tee foamed lid and screws B LOCATION Solid...

Page 9: ...tter water can cause scalding injuries Appropriate caution must be taken when using hot water Special supervision must be given to those who cannot act quickly such as children disabled or elderly per...

Page 10: ...rating temperature 4 Adjust left side lever to the desired differential See Figure at right and TPI Diagram 1 The TPI thermostat will call for heat when the tank temperature has fallen to the set diff...

Page 11: ...104362 08 1 23 Alliance SL Installation Operating Service Instructions Indicating Light Temperature Adjust Differential Adjust Screw A TPI CONTROL DIAGRAM 2 TPI CONTROL DIAGRAM 1 6TPI Control Diagram...

Page 12: ...structions Outgoing 24V wires to relay or zone valve Incoming 24V power connection Outgoing 110V wires to circulator Chase Nipple Conduit Incoming 24V power connections NOTE Use proper conduit and cha...

Page 13: ...Installation Operating Service Instructions Installation Diagram Using Zone Valves Installation Diagram Using Separate Circulator Figure 2 Installation Using Circulator Figure 1 General Configuration...

Page 14: ...14 104362 08 1 23 Alliance SL Installation Operating Service Instructions Figure 3 Commercial 7 Installation Piping Figures continued...

Page 15: ...sing Tank Flange L Nut Small outside O ring Large inside O ring Proper Tightening Sequence for Top Mount Coil CAUTION Does not require excessive force to seal properly 3 2 1 6 4 7 2 5 3 8 1 Incorrect...

Page 16: ...1 23 Alliance SL Installation Operating Service Instructions Standard Wiring for Circulator with Boiler Maintaining a Temperature of 180 Wiring for Burner Control L8148E 9 Circulator Burner Control Wi...

Page 17: ...17 104362 08 1 23 Alliance SL Installation Operating Service Instructions Wiring for 4 Zone Valve Wiring for 3 Wire Zone Valve 10 Zone Valve Wiring Diagrams...

Page 18: ...18 104362 08 1 23 Alliance SL Installation Operating Service Instructions Switching Relay R8845U or SR 501 Switching Relay SR 502 or SR 503 11 Switching Relay Wiring Diagrams...

Page 19: ...19 104362 08 1 23 Alliance SL Installation Operating Service Instructions Switching Relay SR 504 with Priority Option 11 Switching Relay Wiring Diagrams continued...

Page 20: ...Immersion Well 105616 01 4 Drain Valve 102802 01 5 O Ring 1 3 16 in 111964 01 6 Outer O Ring 6 3 4 in 101539 01 Inner O Ring 6 1 4 in 7 Gasket Kit 107180 01 8 Hardware Kit 101538 01 TPI Control 10137...

Page 21: ...action has solved your problem contact U S Boiler Company LLC as follows to obtain the number of a qualified service person in your area SALES SUPPORT U B BOILER COMPANY LLC P O BOX 3020 LANCASTER PA...

Page 22: ...g the repair of replacement of such component parts YOUR ACTION When you discover a defect immediately notify the dealer from whom the heater was purchased If you cannot locate the dealer contact the...

Page 23: ...23 104362 08 1 23 Alliance SL Installation Operating Service Instructions SERVICE RECORD SERVICE PERFORMED DATE...

Page 24: ...24 104362 08 1 23 Alliance SL Installation Operating Service Instructions U S Boiler Company LLC P O Box 3020 Lancaster PA 17604 1 888 432 8887 www usboiler net...

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