A.O. Smith Ac-U-Temp User Manual

Hot Water Supply Systems

The "TOTAL SYSTEM" Concept- We have taken our highly

efficient equipment and created a convenient package; a
complete domestic hot water system.

Simplifies Installation- The installer simply connects the flue,
gas, electric supply, cold water make-up, and hot water supply
(Building return loops connect to cold water make-up.)

Eliminates Costly Field Errors- These complete hot water
systems are factory-engineered and assembled to assure
proper pipe, pump and wiring sizing. Systems are pre-piped and
wired to guarantee maximum system efficiency.

Factory Tested- Each Ac-U-Temp system is hydrostatic and
fire tested before shipping from the factory.

Ac-U-Temp Storage Tanks- Each Ac-U-Temp storage tank is
especially designed with tank opening locations, that provide
maximum tank draw efficiency and eliminate any unnecessary
piping and connections. Standard Ac-U-Temp tanks are factory
jacketed and insulated (Bare tanks to be insulated by others are
also available.) The Ac-U-Tanks are factory standard with the
same superior glass lining that has set new standards for the
tank industry. Standard tank capacities range from 80 gallons to
1,000 gallons (Custom tanks to 10,000 gallons are available).

CONSERVATIONIST

COMMERCIAL BOILERS

®

Other Features

ASME Temperatures and Pressure Relief Valve 125# - Tank
Temperature Sensor- Tank Thermometer- Isolation Valves
(Reliable Ball Valves) - Superior I-Beam Skid - 125 psi Tank
Construction - CI Bronze Fitted Pump.

Options- All Bronze Circulating Pump - Sequencing Control
Panel (For Multi-Boiler systems) - 150 and 160 psi Tank
Construction - 11" x 15" Manholes- Cement and Epoxy Tanks
Linings.

Custom Ac-U-Temp Systems- All Ac-U-Temp Systems are
built to order, and can be precisely designed to specifically meet
your specifications. Many combinations of boilers and tanks are
available. Consult your local A.O. Smith Representative for
factory assistance.

Multi-Boiler SystemS- High recovery systems that can meet
any hot water demand. Systems can be designed to provide 50
to 100% back-up. Boilers can be on & off fired, or sequenced to
meet changing system demands. Sequenced multi-boiler
systems that employ relatively small storage tanks are ideal for
applications with constant, yet fluctuating hot water demands.

Multi-Tank Systems- For applications with low ceiling heights
or unique installation challenges.

Optional Dual Energy Source Capability - Ac-U-Temp storage
tanks can be specified with heat exchangers; allows winter/
summer heating boiler operation. Both, water to water, or steam
to water exchangers are available in both single wall and double
wall. Complete control packages can be factory installed for hook­up and run capability.

Electric Back-up - Heavy - duty electric water heater elements
and controls can be specified for up to 3,000 KW; 100% electric
back-up. Provides hot water even during natural gas curtailments.

LIMITED WARRANTY OUTLINE

If the heat exchanger modules should fail within 5
years, under the terms of the warranty, A.O. Smith
will furnish a replacement part; installation, labor,
handling and local delivery extra. If the tank should
leak any time during the first 5 years, under terms of
the warranty, A.O. Smith will repair or replace the
tank; installation, labor , handling and local delivery
extra. THIS OUTLINE IS NOT THE WARRANTY.
For complete information, consult the boiler and
tank warranties or information, consult the boiler
and tank warranties or A.O Smith Water Products
Company.

Revised June 1999 (Reviewed July 2003) A 011.4

CONFIGURATION V

A 011.5

CONFIGURATION H

CONFIGURATION S

CONFIGURATION P

A 011.6

Model to Specify: HWT - 670 - TJH - 500 A - S

Indicates System Configuration
A = ASME Code
Tank Capacity (Gallons Storage)
Tank Type (TJV = Vertical, TJH = Horizontal)
Boiler BTU Size
T = System
Boiler Type

BOILER DATA

HW-300 HW-399 HW-420 HW-520 HW-520

LENGTH (C2) 25 1/4 27 27 27 27
WIDTH (C1) 30 1/4 32 32 34 34
HEIGHT (D) 67 59 59 71 67
INLET SIZE 1 1/4 1 1/2 1 1/2 2 2
GAS INLET 3/4 1 1 1 1

VERTICAL VESSEL DATA

TJ80A TJV120 TJV140 TJV200 TJV250 TJV350 TJV400 TJVT500 TJV500 TJV750 TJV1000

HEIGHT (A) 66.25 66 88 84 96 99 92 101 86 118 150
WIDTH (B1) 28 28 30 36 36 42 42 48 54 54 54
INLET HEIGHT (B2) 15 15 19 1/2 21 21 22 1/2 22 1/2 24 25 1/2 25 1/2 25 1/2
INLET SIZE 2 2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 3 3 3 3
OUTLET SIZE 2 2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 3 3 3 3

HORIZONTAL VESSEL DATA

TJH 200 TJH 350 TJH 400 TJHT 500 TJH 500 TJH750 TJH 1000

LENGTH (A1) 77 93 99 94 79 111 143
OUTLET DIM (A2) 59 72 1/2 72 1/2 73 56 1/2 88 1/2 120 1/2
WIDTH (B1) 36 42 42 48 54 54 54
HEIGHT (B2) 41 47 47 53 59 59 59
INLET HEIGHT (B3) 21 24 24 27 30 30 30
INLET SIZE 2 1/2 2 1/2 2 1/2 3 3 3 3
OUTLET SIZE 2 1/2 2 1/2 2 1/2 3 3 3 3

SUGGESTED SPECIFICATION

Hot Water Supply System - shall consist of A.O. SMITH Ac-U-Temp® factory assembled unit Model No. _________. System shall

be completely factory assembled and shall include the A.O. SMITH copper heat exchanger type hot water supply boiler(s), with
input of _______ BTU/H for _______ gas and recovery capacity of _______ gph, and the A.O. SMITH glass-lined (cement/epoxy)
hot water storage tank with ______ gallons capacity for ________ mounting (vertical-horizontal). System shall include properly
sized circulator, inlet and outlet thermometers, tank temperature thermometer, relief valve, and tank temperature control. Entire
system shall be rigidly mounted on welded steel skid base and shipped assembled to job site (Ac-U-Temp systems employing
tanks too large for shipping as an assembled unit, will be shipped with the tank mounted on a split bolt-together skid).

See HW Boiler specifications A & E Page # A 011.1
Hot water supply boiler(s) and storage tank(s) shall have a 5 year limited warranty against corrosion as outlined in the written

warranty.
NOTE: Custom arrangement also available. Consult factory.

A.O. Smith Water Products Co., Inc. On Line

www.aosmithwaterheaters.com

For Technical Information and

Automated Fax Service,

Phone: [phone]

A Division of A.O. Smith Corporation

A.O. Smith Corporation reserves the right to make product changes or
improvements at any time without notice.

A.O.Smith

Water Products Company

Ashland City, TN

A 011.7 © A. O. SMITH CORP. 1999 Printed in the U.S.A.