A.O. Smith ACT-199I-N, ACT-199I-P, ACT-199O-N, ACT-199O-P User Manual

Commercial Gas

Tankless Water Heater

TANKLESS CONDENSING HIGH EFFICIENCY
COMMERCIAL GAS

Ultra-Low NOx gas tankless water heaters with condensing technology featuring up to

0.95 Uniform Energy Factor (UEF) which lowers operating costs and is environmentally
friendly.

FEATURES:

ULTRA-LOW NOX CONDENSING
TECHNOLOGY PROVIDES UP TO 0.95
UNIFORM ENERGY FACTOR

DURABLE HEAT EXCHANGER

• Primary Heat Exchanger is constructed of
Commercial-Grade Copper that is more
resilient to erosion and is 25x better at heat
transfer than stainless steel thus stabilizing
outgoing water temperatures quicker

• Secondary Heat Exchanger is made of Type
316L Stainless Steel to protect against
corrosion

CONTINUOUS MAXIMUM FLOW
RATES UP TO 10.0 GPM

ENERGY STAR® QUALIFIED

AVAILABLE IN NATURAL GAS OR
PROPANE (LP)

INDOOR MODEL - INCLUDES
INTEGRATED TEMPERATURE
CONTROLLER AND ADVANCED
DIAGNOSTICS TO SIMPLIFY
TROUBLESHOOTING

OUTDOOR MODEL - INCLUDES
A WALL MOUNT TEMPERATURE
REMOTE CONTROLLER AND
ADVANCED DIAGNOSTICS TO
SIMPLIFY TROUBLESHOOTING

FACTORY-INSTALLED POWER CORD
INCLUDED FOR INDOOR MODELS

EASY-LINK UP TO 4 UNITS
(CT-199 MODELS ONLY)

• With no additional parts or accessories
needed

MULTI-LINK UP TO 20 UNITS

COMMON VENT UP TO 8 UNITS

COMPLIES WITH LEAD FREE
STANDARDS

• Safety Features:

• Air-Fuel Ratio (AFR) Sensor

• Exhaust & Water Temperature Safety
Control

• Overheat Cut-Off Fuse

INTERNAL FREEZE PROTECTION
SYSTEM

POWER DIRECT VENT DESIGN

• Exhaust, 3” PVC Venting up to 70 feet or
4” PVC Venting up to 100 feet

• Provides flexible venting with PVC, CPVC,
or ABS Pipe for Intake and Exhaust (solid
core only). Canadian Installations Require
ULCS636 Listed PVC or CPVC Pipe for
Venting.

• Category III or IV venting can be used

ACCESSORIES

• Pipe Cover

• Neutralizer Kit

• Isolation Valve Kits

• Concentric Termination

WARRANTY

• 6-year limited warranty on heat exchanger
in commercial applications

• 5-year limited warranty on all parts

INDOOR MODEL

CT-199

OUTDOOR MODEL

CT-199

©June 2018 A. O. Smith Corporation. All Rights Reserved

www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015

ANSI Z21.10.3 CSA 4.3

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AOSCG14006

Commercial Gas
Tankless Water Heater

Gas Consumption Input Inlet Gas Pressure

Model Number Type

Indoor Models

ACT-199I-N Natural 15,000 199,000 4.0 10.5 0.93 10 3/4" NPT 3/4" NPT 23-5/8 17-3/4 11-1/4 71

ACT-199I-P Propane 13,000 199,000 8.0 14.0 0.93 10 3/4" NPT 3/4" NPT 23-5/8 17-3/4 11-1/4 71

Outdoor Models

ACT-199O-N Natural 15,000 199,000 4.0 10.5 0.95 10 3/4" NPT 3/4" NPT 23-5/8 17-3/4 11-1/4 69

ACT-199O-P Propane 13,000 199,000 8.0 14.0 0.95 10 3/4" NPT 3/4" NPT 23-5/8 17-3/4 11-1/4 69

All dimensions are in inches.
15-150 psi Water Pressure. 40 psi or above is recommended for maximum flow.
*Current numbers based on factory testing; 0.4 GPM required for continuous fire after initial ignition.
Indoor models are certified from sea level to 10,100 ft. elevations.
Outdoor models are certified from sea level to 6,000 ft. elevation.
The manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligation.

Minimum

BTU/H

Maximum

BTU/H

Minimum

in. W.C.

Maximum

in. W.C.

UEF

Maximum

GPM*

Hot/Cold

Connections

Gas

Connection

Dimensions in Inches Approx

Shipping

Height Width Depth

Weight

(lbs)

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AOSCG14006