Univex ProMax SL User Manual

DIRECT-VENT

Residential Gas Water Heaters

ProMax SL Direct-Vent Features

SIDE-MOUNTED RECIRCULATING TAPS

n For installation with combination space heating/potable water heating

applications (such as with air handlers) or any system requiring a recirculating hot water loop.

DIRECT-VENT DESIGN

n One-pipe, dual-channel closed-combustion system draws all make-up air

from outside the home, eliminating problems caused by insufficient indoor ventilation, and is FVIR compliant

n Horizontal air intake and venting on all models up to 80 inches from outside

wall, with no electrical power needed.

A. O. SMITH DYNACLEAN™ DIFFUSER DIP TUBE

n Helps reduce lime and sediment buildup, maximizes hot water output.

Made from long-lasting PEX cross-link polymer.

GREEN CHOICE™ GAS BURNER

n Patented “eco-friendly” design reduces NOx emissions up to 33% and

complies with Southern California and Texas requirements.

PUSH BUTTON PIEZO IGNITER

n Makes lighting pilot fast and easy with one hand push button spark ignition.

HEAT TRAP NIPPLES Factory installed.

DURABLE TAMPER-RESISTANT BRASS DRAIN VALVE

A. O. SMITH PERMAGLAS®GLASS COATING

n Protects steel tank from rust.

FACTORY-INSTALLED TEMPERATURE & PRESSURE (T&P) RELIEF VALVE

6-YEAR LIMITED TANK & PARTS WARRANTY

n For complete information, consult written warranty or A. O. Smith Water

Products Company.

CODE COMPLIANCE: UBC, CEC, SBCC, CABO, HUD, BOCA NATIONAL CODES, ASHRAE/IES 90.1-1999 AND 2004 NAECA

DESIGN-CERTIFIED BY CSA INTERNATIONAL

n According to ANS Z21.10.1 standards governing storage-type water heaters.

Revised April 2008

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AOSRG46400

Residential Gas Water Heaters

MODEL

NUMBER

HOUR

RATING

ENERGY

FACTOR

GALLONS

GDV-40L 73 .62 40 38,000 41 68 54-3/4 22-1/4 16 12-1/4 45-1/4 Co-Axial 167

GDVT-50L 88 .59 50 50,000 55 76 64-3/4 22-1/4 16-1/4 12-1/2 55-1/2 Co-Axial 187

FIRST

GAL. CAP.

BTU

INPUT

PER

HOUR

RECOVERY

90ºF RISE GALLONS

PER HOUR

A B C D E F

DIRECT-VENT

DIMENSIONS IN INCHES

16-1/2

41-3/4

53-3/4

VENT

OUTLET*

APPROX.

SHIPPING

WEIGHT

(LBS)

GDV-75L 131 .59 75 55,000 60 76 65-3/4 26-1/4 16-1/4 12-1/2 55-1/2 17-1/4 54 Co-Axial 310

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. All models are certified for sale in Canada (add SMR “T25”). 75 gallon water connections are 12” on center.

Important! Vent Installation and Termination Requirements

n Maximum horizontal vent distance is 80” to outside of exterior wall.

n Minimum horizontal vent distance is 17” to outside of exterior wall.

n Vent pipes may be trimmed (cut) for short vent installations.

n 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.

n 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).

n 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)

n 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)

40 & 50 gal.

25-1/4

75 gal.

29-1/2

TOP

MIN VENT

MAX VENT

6” DIA. on 40 & 50 Gallon Models

7” DIA. on 75 Gallon Models

6 DIA.

OUTLET

T&P

DRAIN

INLET

42°

47°

55°

69°

75 gal vent termination cap is not interchangeable with vent cap on 40 & 50 gal models

EXTERIOR

WALL

n Vent termination clearance hole through the exterior

wall should be approximately 7” diameter.

n Snow accumulation and drifting should be considered

when locating the termination.

n An optional wire grill vent cap protector is available

through the parts department, part number 9006627.

n See the installation manual for complete

SIDE

TAPS

installation and venting requirements.

FRONT

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 April 2008

www.hotwater.com

AOSRG46400

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