A. O. Smith GCN-100 User Manual

Residential Gas Water Heaters

PROMAX® ULTRA-LOW NOX
HIGH RECOVERY

FEATURES

The GCN-100 is an Ultra-Low NOx atmospheric vent residential gas water heater
which meets the thermal efficiency and standby loss requirements of the U. S.
Department of Energy and Current Edition ASHRAE/IESNA 90.1.

FULLY AUTOMATIC CONTROLS WITH SAFETY SHUTOFF — Accurate,
dependable control system requires no electric connections. Fixed automatic
gas shutoff device for added safety.

HEAVY GAUGE STEEL JACKET — Finished with baked enamel over
bonderized undercoat.

GLASSLINED TANK — Maximizes tank life.

FOAM INSULATION — Saves fuel, helps reduce standby heat loss.

ULTRA-LOW NOx Emissions — Complies with SCAQMD Rule 1146.2 and other

Air Quality Management Districts with similar requirements of 14 ng/j or 20 ppm.

EASY-TO-INSTALL — Completely factory-assembled. Only gas, water and vent
connections need to be made. All connections are located in front and top of
heaters for ease-of-installation and service.

GCN-100

DRAFT DIVERTER — Low profile diverter furnished as standard equipment.

MAXIMUM WORKING PRESSURE — 150 psi.

MAXIMUM GAS INLET PRESSURE — 14” W.C.

ANODIC PROTECTION — Coregard™ Anode Rod.

CSA CERTIFIED AND ASME RATED T&P RELIEF VALVE

SIX YEAR LIMITED TANK AND PARTS WARRANTY — For complete warranty

information, consult written warranty or contact A. O. Smith.

Revised June 2013

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DRAIN
VALV E

K

HOT WATER

OUTLET

J

A

Residential Gas Water Heaters

HOT

TOP VIEW

H

L

COLD

C

F

D

K

COLD WATER

INLET

TEMPERATURE
AND PRESSURE
RELIEF VALVE

G

B

DRAIN VALVE

E

M

GAS INLET

FRONT VIEW

BTU

MODEL

GCN-100 100 75,100 60,080 81 70-1/2 66-1/2 30-15/16 27-3/4 15-3/16 4 15-3/4 16 1-1/4 1-1/4 1/2 11-15/16 350

Water heater(s) shall be Model ________________ as manufactured by A. O. Smith or an approved equal. Water heater(s) shall be of glasslined design, equipped to burn
__________ gas and design certified by UL and shall be approved by the National Sanitation Foundation (with optional leg kit). Heaters must meet all applicable energy codes
and comply with ultra-low NOx emissions of 14 ng/j or 20 ppm. Heaters shall have an input rating of _____ BTU/H and a recovery capacity of _____ GPH at a temperature rise
of 90°F with a storage capacity of _____ gallons. Heater shall have a working pressure of 150 psi. Heater(s) shall be provided with an automatic gas shutoff device and safety
shutoff in event pilot flame is extinguished; a gas pressure regulator set for the type of gas supplied; an approved draft diverter, and extruded anode rod rigidly supported
for cathodic protection. A CSA Certified and ASME Rated T&P Relief Valve shall be furnished and installed by the manufacturer. The tank shall be foam insulated. The outer
jacket shall have a baked enamel finish over a bonderized undercoating. Fully illustrated instruction manual. All internal surfaces of the heater(s) exposed to water shall
be glasslined with an alkaline borosilicate composition that has been fused-to-steel by firing at a temperature range of 1400° to 1600°F. Heater tank shall have a six year
limited tank and parts warranty against corrosion and tank failure due to sediment build-up as outlined in the written warranty. Heater(s) shall be design certified by UL for
operation of the heater in a closed system where thermal expansion has not been compensated for with a properly sized expansion tank will void the warranty.

GALLON

CAPACITY

INPUT

PER

HOUR

BTU

OUTPUT

PER

HOUR

RECOVERY

90°F RISE
GALLONS

PER HOUR

DIMENSIONS IN INCHES

SUGGESTED SPECIFICATION

APPROX.

SHIPPING

WEIGHT

(LBS.)ABC DEFGHJKLM

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.

www.hotwater.com

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