A.O. Smith ProMax Direct-Vent GDV-40 Owner's manual

Features
DIRECT VENT DESIGN
One-pipe, dual-channel closed system draws all make-up air from outside
the home, eliminating problems caused by insufficient indoor
ventilation and is FVIR compliant.
Horizontal air intake and venting on all models up to 80 inches from
outside wall with no electrical power needed.
DYNACLEAN™ DIFFUSER DIP TUBE
Helps reduce lime and sediment buildup, maximizes hot water output.
Made from long-lasting PEX cross-linked polymer.
INTELLIGENT CONTROL LOGIC
The internal microprocessor provides enhanced operating parameters and
tighter differentials for precise sensing and faster heating response to optimize
performance
GREEN CHOICE® GAS BURNER
Patented “Eco-Friendly” design reduces NOx emissions up to 33% and
complies with requirements for less than 40ng/j for low NOx.
SELF-POWERED ELECTRONIC GAS VALVE
Uses a thermopile to generate the power needed to operate the electronic
gas control without requiring an external power source.
DIAGNOSTICS
The electonic gas control incorporates and LED status indicator that monitors
system operation and service diagnostics.
PUSH BUTTON PIEZO IGNITOR
Makes lighting pilot fast and easy with one hand push button spark
ignition.
HEAT TRAP NIPPLES
Factory-installed.
DURABLE TAMPER-RESISTANT BRASS DRAIN VALVE
PERMAGLAS®GLASS COATING
Protects steel tank from buildup.
CSA CERTIFIED AND ASME RATED T&P
RELIEF VALVE
6-YEAR LIMITED TANK & PARTS WARRANTY
For complete information, consult written warranty
CODE COMPLIANCE
UBC, CEC, SBCC, HUD and BOCA National Codes. Meets the thermal efficiency
and standby loss requirements of the U.S. Department of Energy and current
edition of ASHRAE/IESNA 90.1. and meets the Federal Energy Efficiency Standards
effective January 20, 2004, according to the National Appliance Energy Conservation
Act (NAECA) of 1992.
DESIGN-CERTIFIED BY CSA INTERNATIONAL
According to ANSI Z21.10.1– CSA 4.1 Standards governing storage-type water
heaters.
AOSRG45701
Residential Gas Water Heaters
Page 1 of 2
DIRECT VENT
Revised July 2012
®
237962_AOSRG45700.indd 1 7/6/11 3:42 PM
Low Lead Content
Series 200/201
®

www.hotwater.com
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.
SERIES
FIRST
HOUR
RATING
GALLONS
ENERGY
FACTOR GAL. CAP.
BTU
INPUT
PER HOUR
RECOVERY
90ºF RISE
GALLONS
PER HOUR A B C** D E F
VENT
OUTLET*
APPROX.
SHIPPING
WEIGHT
(LBS)
200 73 0.60 37 38,000 37 68 54-3/4 22-1/4 16 12-1/4 45-1/4 Co-Axial 167
200 87 0.59 50 42,000 45 76 63-3/4 22-1/4 16 12-1/4 54 Co-Axial 185
200 88 0.58 50 50,000 55 76 64-3/4 22-1/4 16-1/4 12-1/2 55-1/2 Co-Axial 187
200 131 0.57 75 55,000 60 76 65-3/4 26-1/4 16-1/4 12-1/2 55-1/2 Co-Axial 310
MODEL
NUMBER
GDV-40
GDV-50
GDVT-50
GDV-75
Recovery capacities based on actual performance tests.
* Dual-channel system has 3˝ vent pipe inside 6˝ air intake pipe, for the 40 & 50–gallon models.
The 75 gallon model uses a 4” x 7” co-axial pipe.
All Models Have 2” Foam Cavity.
Water connection 3/4” male all models.
75 gallon water connections are 12” on center.
** Allow 25 1/4¨ for 40 and 50–gallon models and 29 1/2¨ for 75–gallon models for
front–to–back dimensions for air intake at the rear of the heater.
Propane units are Series 201
All models are certified from sea level to 7,700 ft. elevations.
DIMENSIONS IN INCHES
E
F
B
A
D
FRONT
MAX VENT
80
C
EXTERIOR
WALL
6 DIA.
MIN VENT
17
42°
47°
25-1/4
TOP
DRAIN
T&P
Important! Vent Installation and Termination Requirements
Maximum horizontal vent distance is 80” to outside of exterior wall.
Minimum horizontal vent distance is 17” to outside of exterior wall.
Vent pipes may be trimmed (cut) for short vent installations.
For vent installation less than 30” the vent restrictor is required.
Place restrictor over the flue outlet on heater before installing the outlet vent
pipe to the heater.
Recommended installation height for the heater vent pipe should be
68” for 40 gallon models and 76” for the 50-gallon and 75-gallon
models (vent height).
Offset Vent Arrangement
1. When replacing an existing direct vent model,
the new vent pipe may drop from the minimum
vent height as much as 7 1/4” to exit through the
existing vent opening in the exterior wall.
2. Vent may have one horizontal 90 degree turn before
exiting through exterior wall (Do not combine both
offset vent arrangements in one installation) (See
examples in the installation manual)
High Rise Vent Arrangement
3. When vent termination is more than 80” above the
base of the heater. The horizontal vent run must be
a minimum of 22” from the center of the heater to
the outside exterior wall surface. (See example in the
installation manual)
Vent termination clearance hole through the exterior
wall should be approximately 7” diameter.
Snow accumulation and drifting should be considered
when locating the termination.
An optional wire grill vent cap protector is available
through the parts department. Part number 9006627005.
See the installation manual for complete installation
and venting requirements.
Residential Gas Water Heaters
DIRECT VENT
AOSRG45701
Page 2 of 2
Revised July 2012
40 & 50 gal.
25-1/4
75 gal.
29-1/2
6” DIA. on 40 & 50 Gal. Models
7” DIA. on 75 Gal. Models
75 gal. vent
termination
cap is not
interchangeable
with vent cap
on 40 & 50 gal.
models
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