Rough-In-Dimensions; Foreword - A.O. Smith 650A, 740A Installation & Operation Manual

ROUGH-IN DIMENSIONS
STANDARD BAROMETRIC DRAFT CONTROL
BTP MODELS
ALL DIMENSIONS IN INCHES (MILLIMETERS)
Models A
80 3/4
BTP(V)-540A
2,051
80 3/4
BTP(V)-650A
2,051
80 3/4
BTP(V)-740A
2,051
*Minimum gas supply pipe is 1 1/4", reference Table 7 for gas supply pipe size.
Models U.S. Gals. (Litres)
BTP(V)-540A
BTP(V)-650A
BTP(V)-740A
Based on 80% thermal efficiency obtained in A. O. Smith engineering laboratories.
NOTE: To compensate for the effects of high altitude areas above 2000 feet, recovery ratings should be reduced approximately
4% for every 1000 feet above sea level.

FOREWORD

The design of the BTP 540A through 740A models complies
with ANSI Z21.10.3/CSA 4.3 as an automatic circulating tank
and an automatic instantaneous type heater. The BTPV 540A
through 740A models are designed for sidewall venting and
direct venting applications and are certified under UL 795.
Detailed installation diagrams are found in this manual. These
diagrams will serve to provide the installer with a reference for
the materials and methods of piping necessary. It is highly
essential that all water, gas piping and wiring be installed as
shown on the diagrams.
B C D
73 32 1/4 9
1,854 819 229 152
73 32 1/4 9
1,854 819 229 203
73 32 1/4 9
1,854 819 229 203
Storage Input Rating
Capacity BTU/HR.
Nat.
85 (261) 540,000
85 (261) 650,000
85 (261) 740,000
HORIZONTAL & DIRECT VENTING
E F G
6 26 1/2 93 29 1/2
673 2,362 749
8 26 1/2 93 29 1/2
673 2,362 749
8 26 1/2 93 29 1/2
673 2,362 749
Recovery Rating
GPH
100°F Rise
523.6
630
718
Particular attention should be given to the installation of
thermometers at the locations indicated on the diagrams, as
these are necessary for checking the proper functioning of the
heater.
THE HEATER IS DESIGNED TO OPERATE ONLY ON NATURAL
GAS.
THESE HEATERS MUST NOT BE INSTALLED ON
COMBUSTIBLE FLOORS.
2
BTPV MODELS
MAXIMUM TOTAL 75 EQUIVALENT
FEET INTAKE AND EXHAUST
ALLOWED.
Gas
H I Conn.
48 1/2 1*
1,232 25.4
48 1/2 1*
1,232 25.4
48 1/2 1*
1,232 25.4
Recovery Rating Current Draw
GPH
140°F Rise 60Hz 1 Phase
374
450
512
Approx.
Ship. Wt.
950
431 kg
950
431 kg
950
431 kg
120V
6.0 Amps