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Pre-Installation

Visually inspect the HWBT for any damage. If damage exists 
return product for replacement.

Installation

THIS PRODUCT MUST BE INSTALLED BY A 

LICENSED PROFESSIONAL.

Refer to Figure 1 for typical installation of the AMTROL 

 

HWBT Series.

Maintenance

A licensed professional should check the complete system, 

including the HWBT, yearly and more frequently as the 

 

system ages.

Operation

1.  The HWBT models are designed to add thermal mass to non-

potable, closed, hot water systems helping minimize boiler 

cycling that occurs during no/low domestic load conditions.

2.  Water temperature not to exceed 450°F.
3. System pressure is not to exceed the maximum working 

pressure of the tank.

Warranty

HWBT120-2 through HWBT300-4/4 Models

:

One (1) Year Limited Warranty

Visit www.amtrol.com for complete warranty details.

PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY

IMPORTANT GENERAL SAFETY INFORMATION - 

ADDITIONAL SPECIFIC SAFETY ALERTS APPEAR IN THE FOLLOWING INSTRUCTIONS.

Figure 1

SYSTEM

PUMP

BOILER

2 Port Installation

SYSTEM

PUMP

BOILER

PUMP

4 Port Installation

© 2019 Worthington Industries Inc. 

Part #: 9017-157 (06/19)

One or more features of this product are covered by U.S. patents, visit www.amtrol.com/patents for more information. 

1400 Division Road, West Warwick, RI  USA 02893

T: 800.426.8765  

www.amtrol.com

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