Rinnai Sizing Reference Guide for Tankless Rack Systems Utilizing Storage Manual de usuario descargar pdf (Pagina 2)

How to Select a TRS System Using TRS Performance

Chart (Recovery GPH / First Hour Delivered Required):

Find value closest to speciﬁed recovery GPH or ﬁrst hour delivered at temperature rise. Select corresponding TRS system, storage

tank and recovery pump size to the left of the table.

For example: If speciﬁed First hour delivered is 900 gallons @60° F rise, select TRS system corresponding to

896 gallons:

TRS System: TRS02 or TRW02

Storage tank size: 200 gallons

Recovery pump size: 12 GPM @30 ft head

How to Select a TRS System Using TRS Cross Reference Chart:

Find existing or speciﬁed system BTUH and thermal Eff (TE) to the left of chart, match closely to TRS system BTUH and select TRS

System with recovery pump accordingly.

For example: If existing or speciﬁed system BTUH is 400,000 and thermal Eff ≥ 93%

TRS System: TRS02 or TRW02

Storage tank size: as speciﬁed or existing

Recovery pump size: 12 GPM @ 30 ft head

Product Sizing Disclaimers

This Sizing Reference Guide and all information contained herein is based on the proper installation and use of (1) a series of

Rinnai Tankless Water Heaters which are piped to a storage tank and (2) an adequate and properly-sized Recovery Pump that

will recover the storage tank (i.e., that will circulate water from the Rinnai Tankless Water Heaters into the storage tank) thereby

allowing the Rinnai Tankless Water Heaters to properly heat the water for the storage tank.

This Sizing Reference Guide is intended to be used as a guide only and not as a replacement for a professionally-engineered

project. The guide should only be referenced after your design criteria has been selected and approved by your design engineer

and/or contractor. The guide is intended to assist the user in determining the model type and number of products that can be

utilized for a particular application. The information set forth herein is for general assistance and information only and should not

be the sole factor in making any decision about a speciﬁc system or product.

For additional information, please refer to the Rinnai Hot Water System Design Manual or contact the Application Engineering

Department at Rinnai America Corporation.

The information set forth herein regarding performance of a TRS/Storage tank system does not, and is not intended to imply,

warrant, or represent that a speciﬁc system is adequate or appropriate for your given application.

The sizing information set forth herein does not describe a complete system. Anyone using this Sizing Reference Guide is

ultimately responsible for determining the actual hot water demand for the speciﬁc application and for selecting appropriate

Rinnai products for the given application.

Your design engineer and/or contractor must determine the necessary components for and conﬁguration of the particular system

being installed. All such design conditions must be met. The information contained herein does not imply compliance with local

building codes. It is the responsibility of your design engineer and/or contractor to ensure that installation of any system is

performed in accordance with all applicable building codes. You should always confer with local building ofﬁcials before installation.

An adequate and properly-sized Recovery Pump is critical to the proper performance and operation of the systems described

herein. Indeed, the systems described herein will only work with an adequate and properly-sized Recovery Pump.

Ensure that all water supply pipes are sized per local plumbing codes.

Multiple TRS should be installed in parallel using a secondary manifold from the building’s cold and hot water supply. You should

reference the particular section of the TRS installation manual for piping multiple racks.

The building’s circulation pump must be controlled by an aquastat, timer, or both.

The Recovery Pump must be controlled by a submersible aquastat placed inside the tank. A minimum 20°F differential

temperature setting is required for the aquastat. For example, if the Rinnai set point is 140°F, then the aquastat activation set

point should be 120°F.

Always refer to the storage tank and aquastat manufacturer installation instructions for additional information.

Only use pumps of brass, bronze, or stainless steel construction. Do not use pumps of iron construction.

If the intended installation of a system is located in a hard water area, a softener or similar water treatment system must be used.

8.5”7.25”5.5”

FOR TRADE PROFESSIONALS

Rinnai America Corporation • 103 International Drive, Peachtree City, GA 30269

Toll-Free: 1-800-621-9419 • Phone: 678-829-1700 • www.rinnai.us

to change without prior notice. Local, state, provincial, federal and national fuel gas codes must be adhered to prior to and upon installation.

A tradition of

TRUE RELIABILITY.

For nearly 100 years, we at Rinnai have been ercely committed to

delivering nothing less than our absolute best at every touch point.

To us, that means more than manufacturing products—it’s about

inspiring condence in our customers. Condence in the comfort

our solutions give. And in the support we provide.

Learn more about our high-performance Tankless Water Heaters,

Boilers and Direct Vent Wall Furnaces at www.rinnai.us

R-PRWH-E-25 08/2013

Sizing Reference Guide

FOR TANKLESS RACK SYSTEMS UTILIZING STORAGE

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