A.O. Smith STE - 400 Troubleshooting guide

0311 370 / 03-2014 Innovation has a name.

Commercial Electric Storage

Water Heater

STE - 400/500/600/750/1000

STE

Installation, User and Service

Manual

Changes Reserved

A.O. Smith Europa, De Run 5305, 5503 LW Veldhoven, The Netherlands

+31 (0)40 294 25 00

your installer

Installation, User and Service Manual

Read this manual

carefully

Trademarks

Liability

More information

Warning

Read this manual carefully before starting the electric storage water heater. Failure to read

the manual and to follow the printed instructions may lead to personal injury and damage to

the electric storage water heater.

Nothing from this publication may be copied, reproduced and/or published by means of

printing, photocopying or by whatsever means, without the prior written approval of

A.O. Smith Water Products Company.

A.O. Smith Water Products Company reserves the right to modify specifications stated in

this manual.

Any brand names mentioned in this manual are registered trademarks of their respective

owners.

A.O. Smith Water Products Company accepts no liability for claims from third parties arising

from unauthorised use, use other than that stated in this manual, and use other than in

accordance with the General Conditions registered at the Chamber of Commerce.

Refer further to the General Conditions. These are available on request, free of charge.

Although considerable care has been taken to ensure a correct and suitably comprehensive

description of all relevant components, the manual may nonetheless contain errors and

inaccuracies. Should you detect any errors or inaccuracies in the manual, we would be

grateful if you would inform us. This helps us to further improve our documentation.

If you have any comments or queries concerning specific aspects related to the water

heater, then please do not hesitate to contact:

A.O. Smith Water Products Company B.V.:

PO Box 70

5500 AB Veldhoven

The Netherlands

Telephone: 008008 - AOSMITH

008008 - 267 64 84

General: +31 40 294 25 00

Fax: +31 40 294 25 39

E-mail: [email protected]

Website: -

In the event of problems with your gas, electricity or water supply connections, please

contact the supplier/installation engineer of your installation.

Installation, User and Service Manual

Table of contents

1.1

1.2

1.3

1.4

1.5

1.6

2.1

2.2

2.3

3.1

3.2

4.1

4.2

5.1

5.2

5.3

5.4

5.5

5.6

5.7

Technical specifications ....................................................................................... 7

Floor load ............................................................................................................................. 7

Water composition ............................................................................................................... 7

Working clearance ............................................................................................................... 7

General specifications .......................................................................................................... 7

Electrical specifications ........................................................................................................ 8

Dimensions .......................................................................................................................... 8

Installation ............................................................................................................ 11

Installation diagram ............................................................................................................ 11

Water connections ............................................................................................................. 11

Electrical connections ........................................................................................................ 12

Maintenance ......................................................................................................... 15

Preparation for maintenance .............................................................................................. 15

Water-side maintenance .................................................................................................... 15

Errors .................................................................................................................... 17

Introduction ........................................................................................................................ 17

Troubleshooting table ......................................................................................................... 18

Warranty ............................................................................................................... 21

General warranty ................................................................................................................ 21

Tank warranty .................................................................................................................... 21

Conditions for installation and use ..................................................................................... 21

Exclusions .......................................................................................................................... 22

Scope of warranty .............................................................................................................. 22

Claims ................................................................................................................................ 22

Obligations of A.O. Smith ................................................................................................... 22

Installation, User and Service Manual

1 Technical specifications

1.1 Floor load

1.2 Water composition

1.3 Working clearance

Take the storage water heaters weight in account for the maximum floor load; refer to the

table (1.4 "General specifications").

The storage water is intended for heating drinking water. The drinking water must comply

with the regulations governing drinking water for human consumption. The table gives an

overview of the specifications.

Water specifications

Water composition

Hardness

(alkaline earth ions)

> 1,00 mmol/l:

German hardness > 5,6 °dH

French hardness > 10,0 °fH

English hardness > 7,0 °eH

> 100 mg/l CaCO3

> 100 ppm CaCO3

Conductivity

> 125 μS/cm

Acidity (pH value)

7,0 < pH value < 9,5

Note

If the water specifications deviate from those stated in the table, then the tank protection

cannot be guaranteed (4 "Warranty").

For access to the storage water heaters, it is recommended that the following clearances

are observed:

around the anode connection/top of the water heater: 100 cm.

around the water heater: 50 cm.

1.4 General

specifications

General Specifications - water heater

Unit

STE 400

STE 500

STE 600

STE 750

STE 1000

Contents

litres

405

499

678

763

1055

Empty weight

131

179

201

262

Maximum floor load

504

630

957

964

1317

Maximum operating pressure

kPa (bar)

1000 (10)

Maximum water temperature

ºC

Anodes

Installation, User and Service Manual

1.5 General

specifications

Electrical Specifications - flange element

Unit

2.0 kW

2.5 kW

3.3 kW

6.0 kW

7.5 KW

Supply voltage (-15%, +10% VAC)

Volt

230

400

Number of phases

Current (max. amount per phases)

8.7

10.9

14.4

6.3

Mains frequency (±1 Hz)

IP class

IP-5X

Maximum operating pressure

kPa (bar)

600 (6)

Max. Setpoint Control Thermostat

°C

Overheat Thermostat

°C

Electrical Specifications - screw-in element

Unit

2.0 kW

2.5 kW

3.0 kW

4.5 kW

6.0 kW

7.5 KW

Supply voltage (-15%, +10% VAC)

Volt

230

400

Number of phases

Current (max. amount per phases)

8.7

10.9

2.5

3.8

6.3

Mains frequency (±1 Hz)

IP class

IP-5X

Maximum operating pressure

kPa (bar)

600 (6)

Max. Setpoint Control Thermostat

°C

Overheat Thermostat

°C

1.6 Dimensions

Unit

STE 400

STE 500

STE 600

STE 750

STE 1000

Total height

1705

2040

1835

2030

2000

Diameter tank (with insulation)

720

910

1060

Diameter tank (without insulation)

606

796

946

Height cold water inlet

Height warm water outlet

1650

1990

1797

1992

1962

Diameter inspection opening

115

180

Height inspection opening

410

493

530

Height connection

270

315

360

Height temp. sensor connection

348

400

445

Height connection

425

485

530

Height recirculation connection

510

650

700

Height connection

826

995

1040

1080

1100

Height connection

1094

1348

1255

1374

1351

Height T&P connection

1362

1700

1466

1662

1592

Cold water inlet

R 2

R 2½

Warm water outlet

R 2

R 2½

Installation, User and Service Manual

Unit

STE 400

STE 500

STE 600

STE 750

STE 1000

Connection

Rp ¾

Anode connection

Rp 1¼

Connection

Rp 2

Connection

Rp 2

Connection temp. sensor

Rp ¼

T&P connection

Rp 2

IMD-0526 R0.0

Installation, User and Service Manual

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