A. O. Smith GPD-40 User Manual

Residential Gas Water Heaters

CLOSED COMBUSTION

POWER DIRECT VENT

POWER DIRECT VENT DESIGN

ProMax Power Direct Vent residential gas models are equipped with FVIR technology to meet Phase III of the ANSI Z210.1 - 4.1 CSA standards for the resistance to flammable vapor ignition and resistance to lint, dust and oil accumulation tests.

The two-pipe closed-combustion system draws all make-up air from outside the home, eliminating problems caused by insufficient indoor ventilation.

The system permits combined horizontal and vertical venting and air intake runs up to 45 feet (including one 90º elbow) using 3” Schedule 40 PVC, CPVC or ABS pipe for installation versatility.

INTELLI-VENT™* GAS CONTROL

Models are equipped with silicon nitride hot surface ignitor and advanced electronics for precise control of water temperature and simpliﬁed system diagnostics.

FACTORY INSTALLED HEAT TRAP NIPPLES

Standard on all models.

QUIET, MODULAR BLOWER

Equipped with 110/120 volt electrical system (rating 3 amps or less), 6-foot cord, standard 3-prong male connector.

DYNACLEAN™ DIFFUSER DIP TUBE

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

COREGARD™ ANODE ROD

Aluminum anode with stainless steel core protects tank against corrosion longer than ordinary mild steel anodes.

GREEN CHOICE® GAS BURNER

Patents “Eco-Friendly” design reduces NOx emissions by up to 33%, complies with NOx requirements of less than 40 ng/j

DURABLE TAMPER-RESISTANT BRASS DRAIN VALVE

A. O. SMITH BLUE DIAMOND

Provides superior corrosion resistance compared to industry-standard glass lining.

GLASS COATING

CSA CERTIFIED AND ASME RATED T&P RELIEF VALVE

CODE COMPLIANCE: UBC, SBCC, CABO, HUD, BOCA NATIONAL CODES, ASHRAE/IESNA 90.1 CURRENT EDITION AND 2004 NAECA STANDARDS

DESIGN-CERTIFIED BY CSA INTERNATIONAL

According to ANSI Z21.10.1 - CSA 4.1 standards governing storage-type waterheater.

6-YEAR LIMITED TANK AND PARTS WARRANTY

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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AOSRG45900

POWER DIRECT VENT

Residential Gas Water Heaters

CLOSED COMBUSTION

MODEL

NUMBER

FIRST HOUR

RATING

GALLONS

ENERGY FACTOR

GAL. CAP.

BTU

INPUT

PER HOUR

NATURAL

RECOVERY

90ºF RISE

GALLONS

†

PER HOUR

VALUE*

DIMENSIONS IN INCHES

A B C D E F

BLOWER

OUTLET

GPD-40 70 .60 40 40,000 41 16 57 48-1/2 21 15 8 42 3 224

GPD-50 87 .59 50 40,000 41 16 66 57-1/2 21 15 8 51 3

GPDX-50 105 .58 50 65,000 64 16 69-1/2 61 21 15 8 54-1/2 3 232

GPD-75 130 .58 75 70,000 72 16 71-1/2 61-1/2 26-1/4 15-1/2 8 54-3/4 3 300

GPDX-50 is supplied with 5’ of 3” ABS vent pipe and must be used for the ﬁrst 5’ of the exhaust outlet vent system. GPD-75 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" on all models.

†

Propane inputs/recoveries: GPD-40: 36,000BTU/37GPH

*R Value shown is “performance rated.”

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.

GPD-50: 38,000BTU/39GPH GPDX-50: 60,000BTU/59GPH GPD-75: 65,000BTU/67GPH

11.5" MIN.

FROM TOP OF

HEATER TO

CENTER LINE

OF FLUE

APPROX.

SHIPPING

WEIGHT

(LBS)

232

3" VENT

IMPORTANT: SEE INSTALLATION MANUAL FOR COMBUSTION AIR AND VENTING SYSTEM REQUIREMENTS FOR POWER DIRECT VENT WATE HEATERS

OPTIONAL 3” PVC HORIZONTAL VENT KIT (Kit Number 9006475005)

INSTALL IN ACCORDANCE WITH LOCAL CODES.

3” DIAMETER VENT/EXHAUST

1 3/16”

1 1/2”

3” DIAMETER PVC INTAKE/COMBUSTION AIR

OPTIONAL CONCENTRIC VENT KIT

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

Revised May 2012

www.hotwater.com

4 1/2” DIAMETER

21 1/8”

39”

1/2" GAS

CONNECTION

Maximum hydrostatic working pressure: 150 psi

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AOSRG45900