A.O. Smith ACI-CRS-24IL-N, ACI-CRS-24IL-P, ACI-CRS-26IL-N, ACI-CRS-26IL-P, ACI-CRS-36IL-N User Manual

TANKLESS FREE STANDING IN-LINE

LIGHTWEIGHT

• Constructed of sturdy metal frame

• Utilizes the industry’s lightest 199,000 BTU
high efficiency condensing tankless heater

EXPANDABLE

• Multiple design and installation
configurations

• Up to 597,000 BTU on a single rack system

• Able to link up to 20 heaters together with
multi-link system

Commercial Tankless
Rack System

REDUNDANCY

• Multiple combustion systems provide peace
of mind

• Easily isolate a unit for maintenance which
extends the life of the heaters

EASY FIELD INSTALLATION

• Reduce installation costs with three simple
connections (cold water, hot water, and gas)

EASILY INTEGRATE STORAGE

• As the world’s largest water heater
manufacturer, we can easily integrate
storage into the design

WARRANTY

• 6 year heat exchanger

• 5 year parts

• 1-year limited warranty on rack parts

© July 2017 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

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AOSCG14003

Commercial Tankless
Rack System

Model Number

Indoor Models
ACI-CRS-24IL-N 2 Natural 15,000 398,000 15.2 12.6 10.8 9.4 8.4 7.6
ACI-CRS-24IL-P 2 Propane 13,000 398,000 15.2 12.6 10.8 9.4 8.4 7.6
ACI-CRS-26IL-N 2 Natural 15,000 398,000 15.2 12.6 10.8 9.4 8.4 7.6
ACI-CRS-26IL-P 2 Propane 13,000 398,000 15.2 12.6 10.8 9.4 8.4 7.6
ACI-CRS-36IL-N 3 Natural 15,000 597,000 22.8 18.9 16.2 14.1 12.6 11.4
ACI-CRS-36IL-P 3 Propane 13,000 597,000 22.8 18.9 16.2 14.1 12.6 11.4
Outdoor Models
ACO-CRS-24IL-N 2 Natural 15,000 398,000 15.2 12.6 10.8 9.4 8.4 7.6
ACO-CRS-24IL-P 2 Propane 13,000 398,000 15.2 12.6 10.8 9.4 8.4 7.6
ACO-CRS-26IL-N 2 Natural 15,000 398,000 15.2 12.6 10.8 9.4 8.4 7.6
ACO-CRS-26IL-P 2 Propane 13,000 398,000 15.2 12.6 10.8 9.4 8.4 7.6
ACO-CRS-36IL-N 3 Natural 15,000 597,000 22.8 18.9 16.2 14.1 12.6 11.4
ACO-CRS-36IL-P 3 Propane 13,000 597,000 22.8 18.9 16.2 14.1 12.6 11.4

Model Number Gas Manifold Connection Hot/Cold Manifold Connection Power

Indoor Models

ACI-CRS-24IL-N 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 4.5 A

ACI-CRS-24IL-P 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 4.5 A

ACI-CRS-26IL-N 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 6.75 A

ACI-CRS-26IL-P 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 6.75 A

ACI-CRS-36IL-N 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 6.75 A

ACI-CRS-36IL-P 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 6.75 A

Outdoor Models

ACO-CRS-24IL-N 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 4.5 A

ACO-CRS-24IL-P 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 4.5 A

ACO-CRS-26IL-N 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 6.75 A

ACO-CRS-26IL-P 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 6.75 A

ACO-CRS-36IL-N 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 6.75 A

ACO-CRS-36IL-P 1-1/2” Schedule 40 pipe 2” Copper tube 120 V, 60 Hz, 6.75 A

Number

of

Heaters

Configurations

Fuel
Type

Gas Consumption Input Max Flow (GPM)

Minimum

BTU/h

Maximum

BTU/h

50 F Rise 60 F Rise 70 F Rise 80 F Rise 90 F Rise 100 F Rise

Model Number

ACI-CRS-24IL-N 46 20 53.09 49.5 39 69.5 330

ACI-CRS-24IL-P 46 20 53.09 49.5 39 69.5 330

ACI-CRS-26IL-N 66 20 53.09 69.5 39 69.5 396

ACI-CRS-26IL-P 66 20 53.09 69.5 39 69.5 396

ACI-CRS-36IL-N 66 20 53.09 69.5 39 69.5 448

ACI-CRS-36IL-P 66 20 53.09 69.5 39 69.5 448

Outdoor Models

ACO-CRS-24IL-N 46 20 53.09 49.5 39 69.5 330

ACO-CRS-24IL-P 46 20 53.09 49.5 39 69.5 330

ACO-CRS-26IL-N 66 20 53.09 69.5 39 69.5 396

ACO-CRS-26IL-P 66 20 53.09 69.5 39 69.5 396

ACO-CRS-36IL-N 66 20 53.09 69.5 39 69.5 448

ACO-CRS-36IL-P 66 20 53.09 69.5 39 69.5 448

* Line drawings on pages 3 and 4.
Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.
Model numbers- First number 2/3/4/5/6 = number of tankless units mounted.
Model numbers - Second number 2/3/4/5/6 = rack size (max units that could fit on that rack).

Dimensions in Inches Shipping Dimensions in Inches

A

Length

B

Width

C

Height

Length Width Height

Approx. Shipping

Weight (lbs)

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AOSCG14003