A.O. Smith 650A - Manual (Page 2)

2
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.
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.
ROUGH-IN DIMENSIONS
STANDARD BAROMETRIC DRAFT CONTROL
BTP MODELS
HORIZONTAL & DIRECT VENTING
BTPV MODELS
ALL DIMENSIONS IN INCHES (MILLIMETERS)
Gas Approx.
Models A B C D E F G H I Conn. Ship. Wt.
80 3/4 73 32 1/4 9 6 26 1/2 93 29 1/2 48 1/2 1* 950
2,051 1,854 819 229 152 673 2,362 749 1,232 25.4 431 kg
80 3/4 73 32 1/4 9 8 26 1/2 93 29 1/2 48 1/2 1* 950
2,051 1,854 819 229 203 673 2,362 749 1,232 25.4 431 kg
80 3/4 73 32 1/4 9 8 26 1/2 93 29 1/2 48 1/2 1* 950
2,051 1,854 819 229 203 673 2,362 749 1,232 25.4 431 kg
*Minimum gas supply pipe is 1 1/4”, reference Table 7 for gas supply pipe size.
BTP(V)-540A
BTP(V)-650A
BTP(V)-740A
Storage Input Rating Recovery Rating Recovery Rating Current Draw
Capacity BTU/HR. GPH GPH 120V
Models U.S. Gals. (Litres) Nat. 100°F Rise 140°F Rise 60Hz 1 Phase
BTP(V)-540A 85 (261) 540,000 523.6 374
BTP(V)-650A 85 (261) 650,000 630 450
BTP(V)-740A 85 (261) 740,000 718 512
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.
6.0 Amps
MAXIMUM TOTAL 75 EQUIVALENT
FEET INTAKE AND EXHAUST
ALLOWED.