State Industries 317913-000 Creating the Successful System, Sizing Without Prepared Information

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Creating the Successful System

Creating the successful commercial water heating system is a joint venture involving many persons and skills.

In order to select the right system using either tank type or copper type heaters, one should understand the role that each of the persons concerned with the installation plays.

The following chart summarizes the responsibilities for each of the roles.

Remember, your customer’s success or profit may depend upon the continued availability of hot water . . . and you will achieve that goal through proper system selection and sizing.

IDENTITY

RESPONSIBILITY

 

 

Customer

Must define his needs

 

 

System designer*

Designs a water heating system to satisfy

 

the customer’s needs. Acts as an interface

 

between all involved parties.

 

 

Water Heater Supplier

Furnishes the equipment to meet the system

and/or

specifications. May aid the designer in

Manufacturer

equipment selection or specifications with

 

his knowledge of product performance

 

and availability.

 

 

Plumbing and Electrical

Must understand system concept to provide

Installation Contractors

installation, startup and customer instruction.

 

Also provide maintenance and service for

 

continued satisfaction.

 

 

Energy Supplier

Advises characteristics of energy available

 

at job site and how to achieve best use.

 

Particularly important when electricity is

 

the fuel.

 

 

Water Supplier

Advises characteristics of water, lowest

 

temperature, maximum pressure and

 

hardness. May influence heater selection and

 

use of a pressure reducing valve.

 

 

*The system designer may be the architect, engineer, installing contractor or water heater supplier.

Sizing Without Prepared Information

The following procedures will establish heater recovery and storage tank capacities for intermittent use systems.

Continuous use systems are sized so that heater recovery equals or exceeds demand. Therefore the size of the tank (when proposing a tank type heater system) is unimportant.

The procedures for one and two temperature systems are essentially the same:

1.Establish the hourly 1 / hot water demand in gallons and the maximum temperature rise.

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Contents Technical Guide to Parameters Introduction to Commercial Water heating123456789011 What is Hot Water?Evaluating Water 123456789011Hot Water Demand II. Principles of SizingProfiles of Operation III. Equipment Performance Recovery Capacity TablesStorage Capacity and Tank Efficiency Gas and Oil-Fired Tank Type Heaters Heater Recovery Plus Storage Tank Equals DemandElectric Tank Type Heaters Auxiliary Tank Unfired123456789011 Estimating Water Heating Costs When Using Electricity To Heat WaterDesign Objective IV. System Types and ApplicationSystem Types Two-temperature with mixing valve Pre-heater/booster heater Sizing Without Prepared Information Creating the Successful SystemOne temperature example Field Assistance 123456789011123456789011