A. O. Smith GPD-40L User Manual

®

Residential Gas Water Heaters

POWER DIRECT-VENT

POWER DIRECT VENT DESIGN

n

ProMax SL Power Direct Vent residential gas models are equipped with FVIR technology to
meet Phase III of the ANSI Z21.10.1 standards for the resistance to flamable vapor ignition and
resistance to lint, dust and oil accumulation tests.

n

The Closed-combustion two-pipe system draws combustion air from outside and vents outside
the home. The system vents up to 45 feet (using one 90° elbow) with 3” PVC, CPVC, or ABS
pipe. Canadian installations require ULC S636 listed PVC or CPVC pipe for venting.

SIDE-MOUNTED RECIRCULATING TAPS

n

For installation with combination space heating/potable water heating applications (such as
the ProMax XL Heat Exchanger) or any system requiring are circulating hot water loop.

INTELLI-VENT™* GAS CONTROL

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Equipped with silicon nitride hot surface igniter and advanced electronics for precise control of
water temperature and simplified system diagnostics.

®

HEAT TRAP NIPPLES

n

Standard on all models.

QUIET MODULAR BLOWER

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With 110 /120 Volt electrical system (rating 3 amps or less), with 6-foot cord, standard 3-prong male

connector.

DYNACLEAN™ DIFFUSER DIP TUBE

n

Reduces lime and sediment buildup, maximizes hot water output. Made from long-lasting PEX cross-

linked polymer.

GREEN CHOICE® GAS BURNER

n

Patented“Eco-Friendly”design reduces NOx emissions by up to 33% and complies with requirements

of less than 40 ng/j for low NOx.

MAGNESIUM ANODE RODS

n

Provides long-lasting protection against tank corrosion.

DURABLE TAMPER-RESISTANT BRASS DRAIN VALVE

PERMAGLAS

®

GLASS COATING

CSA CERTIFIED AND ASME RATED T&P RELIEF

CODE COMPLIANCE

n

UBC, SBCC, CABO, HUD, BOCA National codes, Current edition of ASHRAE/IESNA 90.1 and 2004 NAECA

DESIGN-CERTIFIED BY CSA INTERNATIONAL

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According to ANSI Z21.10.1 - CSA 4.1 Standards governing storage-type water heater.

6-YEAR LIMITED TANK AND PARTS WARRANTY

n

For complete information, consult written warranty.

* Intelli-Vent™ is a registered trademark of the Emerson Electric Company

Revised May 2012

Low Lead Content

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®

MODEL

FIRST

ENERGY

GALLON

BTU BTU RECOVERY

R

DIMENSIONS IN INCHES APPROX.

NUMBER

HOUR

FACTOR

CAPACITY

INPUT OUTPUT 90ºF RISE

VALUE

SHIPPING

RATING PER HOUR PER HOUR GALLONS

A B C D E F G H

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 80 .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 54-1/2 17 54-1/2 352

GPDX-50L is supplied with 5’ of 3” ABS vent pipe and must be used for the first 5’ of the exhaust outlet vent system.
GPD-75L is supplied with 5’ of 3” CPVC vent pipe and must be used for the first 5’ of the exhaust outlet vent system.
Recovery capacity based on actual performance tests.
Water Connections – 3/4" Male on 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 9001522 includes two extended PEX lined nipples for side
port connections. Kit Number 9002604 is same as 9001522, 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

F

E

C

D

3" VENT

4"

11.5" MIN.

FROMTOP OF

HEATER TO

CENTER LINE

OF FLUE

1/2" GAS

CONNECTION

B A

G

H

Maximum hydrostatic working pressure: 150 psi

70

105

130

.60

.58

.58

DIMENSIONS IN INCHES APPROX.

SHIPPING

WEIGHT

F

E

C

D

3" VENT

4"

11.5" MIN.

FROMTOP OF

HEATER TO

CENTER LINE

OF FLUE

1/2" GAS

CONNECTION

B A

G

H

Maximum hydrostatic working pressure: 150 psi

Residential Gas Water Heaters

POWER DIRECT-VENT

OPTIONAL 3” PVC HORIZONTAL VENT KIT

(Kit Number 9006475005)

3” DIAMETER
VENT/EXHAUST

INSTALL IN ACCORDANCE WITH LOCAL CODES.

For Technical Information and Automated Fax Service, call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.

Revised May 2012

1 1/2”

www.hotwater.com

1 3/16”

3” DIAMETER PVC
INTAKE/COMBUSTION AIR

OPTIONAL CONCENTRIC VENT KIT

4 1/2” DIAMETER

21 1/8”

39”

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