Crown Boiler Mega-Stor Operations Instructions download pdf (Page 5)

IMPORTANT

The following procedures are used to size indirect water heaters based on the amount of hot water which will be required

during a given hour. In doing so it is assumed that this demand will be evenly spread out over the course of the entire

hour.

THESE SIZING PROCEDURES ARE PROVIDED AS A GUIDE TO ASSIST THE PROFESSIONAL CONTRACTOR

IN SIZING MEGA-STOR TANKS. BECAUSE OF THE LARGE VARIETY OF DEMAND SITUATIONS

ENCOUNTERED IN THE FIELD, CROWN BOILER COMPANY CANNOT GUARANTEE THE SUITABILITY OF

THESE PROCEDURES TO ALL INSTALLATIONS.

Residential Applications

Table 3.1 shows the minimum sized Mega-Stor that should be considered for one and two family homes based on the numbers



order to meet space heating demand, there is usually no need to add boiler capacity just for the Mega-Stor. Note that the sizing

recommendations shown in Table 3.1 may not provide satisfactory performance when there are unusually high peak demands,



-

pool tubs, it is recommended that the Mega-Stor have a domestic water volume at least as large as the nominal volume of the tub.

Commercial Applications

-

ter of the ASHRAE Applications Handbook. Then use the data provided in Tables 2.1, 3.2, and 3.3 to select the boiler and Mega-

Stor.

Table 3.1: Mega-Stor Sizing for Typical One and Two Family Units

(a) (b) (c) (d) (e)

Number of

Bathrooms

Number

of Bed-

rooms

Mega-Stor

First Hour

Requirement

(GPH)

Min. Boiler Output

(MBH)

1 to 1 1/2

1 MS-26 43 27

2 MS-40 60 36

3 MS-40 60 36

2 to 2 1/2

2 MS-40 60 36

3 MS-40 70 36

4 MS-40 72 38

5 MS-53 90 47

3 to 3 1/2

3 MS-53 72 47

4 MS-53 82 47

5 MS-53 90 47

6 MS-53 92 47

III. SIZING

1 2 3 4 5 6 7 8 9 10 ... 27 28

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Crown Boiler Mega-Stor Operations Instructions Page 5

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