A.O. Smith ATO-340H-P Technical Documents | Page 9

A.O. Smith Water Heater Technical Documents - ATO-340H-P.
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9    Page

Maintain all clearances around 

the water heater.

CLEARANCES

Installation

Installation Manual

INCLUDED ACCESSORIES

Model

Top

Bottom

Front

Back

Sides

240Indoor(T-H3J-DV)

340Indoor(T-H3S-DV)

540Indoor(T-H3-DV)

12 in.

(305 mm)

12 in.

(305 mm)

4 in.*

(102 mm)

0.5 in.

(13 mm)

2 in.

(51 mm)

240 Outdoor (T-H3J-OS)

340 Outdoor (T-H3S-OS)

540 Outdoor (T-H3-OS)

36 in.

(914 mm)

12 in.

(305 mm)

24 in.

(610 mm)

0.5 in.

(13 mm)

2 in.

(51 mm)

*24 inches recommended for maintenance.

OPTIONAL ITEMS

Back

Side

Front

Side

Top

Bottom

Check that these items below are included with the water heater.

 Installation manual 

  and owner’s guide

 Temperature remote controller kit*

        Outdoor models only

 Bird screen

 Indoor models only

  Communication cable

 540 (T-H3) models only

Qty:1

Qty:1

Qty:1

*Refertop.29.

Qty:2

#

Model

240

Indoor

(T-H3J-DV)

240

Outdoor

(T-H3J-OS)

340 

Indoor

(T-H3S-DV)

340

Outdoor

(T-H3S-OS)

540 

Indoor

(T-H3-DV)

540

Outdoor

(T-H3-OS)

1. Temperature remote 

controller

2. 4" Backflow preventer 

and F-F adaptor

3.

Pipe cover

4.

Neutralizer kit

5.

Sidewall vent 

terminator (Hood) 

and Wall thimble

6.

3"PVCconcentric

termination

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