A.O. Smith AOSRG45900 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 Z21.10.1 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 igniter 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.
A. O. SMITH DYNACLEAN™ DIFFUSER DIP TUBE
Reduces lime and sediment buildup, maximizes hot water output.
Made from long-lasting PEX cross-link polymer.
COREGARD™ ANODE ROD -
Aluminum anode with stainless steel core protects tank against corrosion longer than
ordinary mild steel anodes.
An A. O. Smith Exclusive
GREEN CHOICE™ GAS BURNER
Patented “Eco-Friendly” design reduces NOx emissions by up to 33%, complies with
Southern California and Texas requirements.
DURABLE TAMPER-RESISTANT BRASS DRAIN VALVE
®
A. O. SMITH PERMAGLAS
Protects steel tank from rust.
GLASS COATING
FACTORY-INSTALLED TEMPERATURE & PRESSURE (T&P) RELIEF VALVE
CODE COMPLIANCE: UBC, SBCC, CABO, HUD, BOCA NATIONAL CODES,
ASHRAE/IES 90.1-1999 AND 2004 NAECA
DESIGN-CERTIFIED BY CSA INTERNATIONAL
According to ANS Z21.10.1 standards governing storage-type water heater.
6-YEAR LIMITED TANK AND PARTS WARRANTY
For complete information, consult written warranty or A. O. Smith Water Products Company.
Created October 2008
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AOSRG45900
POWER DIRECT-VENT
Residential Gas Water Heaters
CLOSED COMBUSTION
FIRST
MODEL
NUMBER
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.”
HOUR
RATING
GALLONS
ENERGY
FACTOR
GAL.
CAP.
GPD-50: 38,000BTU/39GPH
GPDX-50: 60,000BTU/59GPH
GPD-75: 65,000BTU/67GPH
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.
IMPORTANT:
SEE INSTALLATION MANUAL FOR COMBUSTION AIR AND VENTING
BTU
INPUT
PER HOUR
NATURAL
RECOVERY
90ºF RISE
GALLONS
†
PER HOUR
R
VALUE*
DIMENSIONS IN INCHES
A B C D E F
®
11.5" MIN.
FROM TOP OF
HEATER TO
CENTER LINE
OF FLUE
BLOWER
OUTLET
C
E
4"
SYSTEM REQUIREMENTS FOR POWER DIRECT-VENT WATER
HEATERS
APPROX.
SHIPPING
WEIGHT
(LBS)
232
3" VENT
OPTIONAL (DELUXE) ROUND HORIZONTAL
VENT TERMINATION KIT
Part Number 9002749
OPTIONAL (DELUXE) SQUARE HORIZONTAL
VENT TERMINATION KIT
Part Number 9003328
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.
Created October 2008
www.hotwater.com
F
BA
1/2" GAS
CONNECTION
D
Maximum hydrostatic working pressure: 150 psi
Page 2 of 2
AOSRG45900
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