For Technical Information and Automated Fax Service, call 800-527- 1953.
A.O.SmithCorporation reservesthe righttomake productchanges orimprovementswithout priornotice.
Revised August 2007R ©2007 A. O. Smith Corporation Printed in U.S.A.
RESIDENTIAL
Gas Water Heaters
500 Tennessee Waltz Parkway, Ashland City, TN 37015
www.hotwater.com
ARGSS00407
MODEL
FIRST
ENERGY
GALLON
BTU BTU RECOVERY
R
DIMENSIONS IN INCHES APPROX.
NUMBER
HOUR
F A CTOR
CAPACITY
INPUT OUTPUT 90ºF RISE
VALUE
SHIPPING
RATING PER HOUR PER HOUR GALLONS
ABCDEFGH
WEIGHT
GALLONS NATURAL NATURAL PER HOUR (LBS.)
GPD-40L 73 .59 40 40,000 † 30,000 † 41 16 57 48-1/2 21 15 8 42 17 42 224
GPDX-50L 8 0 .58 50 65,000 † 47,500 † 64 16 69-1/2 61 21 15 8 54-1/2 17 54-1/2 232
GPD-75L 123 .53 75 70,000† 53,200 † 72 16 71-1/2 61-1/2 26-1/4 15-1/2 8 5 4-1/2 17 54-1/2 352
GPDX-50L is supplied with 5’ of 3 ”ABS vent pipe and must be used for t he first 5 ’ of theexhaust outlet vent system.
GPD-75L is supplied with 5’ of 3 ”CPVC vent pipe and must be used for thefirst 5’ of the exhaust outlet vent system.
Recovery capacity based on actual performance tests.
Water Connections – 3 /4" Male o n all models.
† Propane Gas – 40-Gallon:36,000 BTU input,27,360 BTU output.
50-Gallon:60,000 BTU input, 43,800 BTU output.
75-Gallon:65,000 BTU input, 49,400 BTU output.
IMPORTANT: VENTING AND COMBUSTION AIR REQUIREMENTS
Read and follow requirements shown in the Installation Manual for ProMax
®
Power
Direct-Vent Gas water heaters dealing with type, placement and length of vent pipe
and vent termination, as well as clearances required to provide adequate
combustion and proper ventilation.
OPTIONAL CIRCULATING LOOP CONNECTION ASSEMBLIES
Sold separately. Kit Number 900152-2 includes two extended PEX lined nipples for side
port connections. Kit Number 900260-4 is same as 900152-2, plus two
di-electric unions and 2 brass isolation valves. For use with systems that have a check
valve in the air handler or recirculating lines.
IMPORTANT:
SEE INSTALLATION MANUAL FOR COMBUSTION AIR AND VENTING
SYSTEM REQUIREMENTS FOR POWER DIRECT-VENT WATER
HEATERS
OPTIONAL (DELUXE) ROUND HORIZONTAL
VENT TERMINATION KIT
Part Number 9002749
OPTIONAL (DELUXE) SQUARE HORIZONTAL
VENT TERMINATION KIT
Part Number 9003328
F
E
C
D
3"VENT
4"
11.5" MIN.
FROMTOP OF
HEATER TO
CENTER LINE
OF FLUE
1/2" GAS
CONNECTION
BA
G
H
POWER DIRECT-VENT
Maximum hydrostatic working pressure: 150 psi
70
105
130
.60
.58
.58
