Crown Boiler Mega-Stor Operations Instructions download pdf (Page 3)

I. PRODUCT DESCRIPTION

The Crown Mega-Stor series indirect water heater is designed to generate domestic hot water in conjunction with a hot water

boiler using forced boiler water circulation. This indirect water heater consists of a stainless steel tank in which a smooth stainless

steel coil is located. Boiler water is pumped through the coil and heats the water in the tank. This tank is not intended for use in



systems.

IMPORTANT NOTE

Some localities require indirect water heaters having a relief valve capacity in excess of 200,000 BTU/hr to be con-

structed and stamped in accordance with ASME requirements. Check with the local authority having jurisdiction before

installing an MS-79 or MS-119 with a boiler or boilers having a total gross output in excess of 200,000 BTU/hr.

II. SPECIFICATIONS

TABLE 2.1: AHRI PERFORMANCE SPECIFICATIONS

Notes:

AHRI ratings based on 77F DHW temperature rise (135F outlet temp) and 180F boiler supply temperature. The ratings in



be obtained under different conditions.

Pressure Ratings:

Maximum Allowable Tank Working Pressure - 150 psi

Design Hydrostatically Tested to 300 psi

Model

First Hour

Rating

Continuous

Draw Rating

Standby

Loss

(°F/hr)

Minimum

Boiler

Output

(MBH)

Boiler Water Through Coil

(Gal/hr) (Gal/hr)

Min Flow

(Gal/min)

Head Loss

(ft w.c.)

MS-26 144 121 1.7 77 8.0 2.5

MS-40 195 157 1.4 102 8.0 3.0

MS-53 226 179 0.9 114 8.0 3.5

MS-79 287 218 1.0 145 8.0 4.8

MS-119 472 384 1.4 225 12.7 7.9

MSH-40 151 116 1.4 75 8.0 2.5

MSH-53 203 158 1.3 101 8.0 3.5

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

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Crown Boiler Mega-Stor Operations Instructions Page 3

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