IT 500 - Boiler A.O. Smith - Free user manual and instructions

Product type	Storage water heater (sanitary hot water tank)
Brand	A.O. Smith
Model	IT 500
Capacity	473 litres
Empty weight	180 kg
Max. operating pressure tank	10 bar (1000 kPa)
Max. operating pressure heat exchanger	16 bar (1600 kPa)
Max. temperature tank	95 °C
Max. temperature heat exchanger	110 °C
Heat exchanger power (coil)	100 kW
Primary flow (80/60 °C)	4300 l/h
Total height	2040 mm
Diameter	720 mm
Cold water connection	R 2"
Hot water connection	R 2"
Heat exchanger connection (inlet/outlet)	Rp 1"
Number of anodes	1
Tank material	Vitrified steel
Power supply	Indirect via heat exchanger (primary circuit)
Main functions	Production and storage of sanitary hot water
Maintenance and cleaning	Periodic descaling of the tank, inspection and replacement of anodes
Safety	Mandatory safety group, recommended thermal valve, cathodic protection
Tank warranty	3 years (1 year if softened water)
Parts warranty	1 year

Frequently Asked Questions - IT 500 A.O. Smith

How to descale the tank of the IT 500?

Drain the appliance, remove the cover of the cleaning opening, manually remove the limescale deposits. If necessary, use a suitable descaling product. Replace the gasket and cover, then tighten the bolts to a maximum torque of 50 Nm. The frequency depends on the water hardness and the set temperature (max 60 °C recommended).

How to check the protection anodes?

Disconnect the anodes one by one. Measure their diameter at several points: it must be at least 60% of the original diameter. If less, replace the anode. Sacrificial anodes protect the tank against corrosion.

What is the maximum operating pressure of the tank?

The maximum operating pressure of the tank is 10 bar (1000 kPa). That of the heat exchanger is 16 bar (1600 kPa).

How to install the safety group?

Mount an approved safety group on the cold water inlet, as close as possible to the appliance. Connect the overflow to an open drain pipe. Do not place any shut-off valve or non-return valve between the group and the appliance.

What is the warranty of the IT 500?

The general warranty is 1 year on parts. The vitrified steel tank is guaranteed for 3 years, unless filtered softened water circulates (reduced to 1 year).

What to do in case of tank leakage?

Contact your installer or after-sales service. If the leak is due to a manufacturing defect and the warranty applies, A.O. Smith may provide a new appliance under conditions (see manual §4).

What temperature to set for hot water?

To limit scaling, we advise setting the temperature to a maximum of 60 °C. The maximum tank temperature is 95 °C.

Is a water softener required for the IT 500?

Not mandatory, but water must meet certain specifications: hardness > 1.00 mmol/l, conductivity > 125 µS/cm, pH between 7.0 and 9.5. If water is softened, the tank warranty is reduced to 1 year.

How to drain the appliance?

Close the water supply, open a hot water tap, then open the drain valve located at the bottom of the appliance. Ensure the drain is free. Close after maintenance.

Can I install a shut-off valve between the safety group and the appliance?

No, it is prohibited. No shut-off valve or non-return valve may be installed between the safety group and the cold water inlet of the appliance, in accordance with safety instructions.

USER MANUAL IT 500 A.O. Smith

IT - 400/500/600/750/1000

0310 110

White cylindrical device with black buttons and two dots on top (no visible text or symbols)

Installation, User and Service

Manual

Inhoudsopgave / Table of contents / Table des matières

NL

This manual consists out of 3 languages.

1 - NL Handleiding IT 400 t/m 1000 5
2 - UK Manual IT 400 till 1000 19
3 - FR Notice IT 400 à 1000 35

FR

Copyright © 2011 A.O. Smith Water Products Company

A.O. Smith Water Products Company

Postbus 70

5500 AB Veldhoven

Nederland

Telefoon: (gratis) 008008 - AOSMITH

0800 - 267 64 84

Specifications water

IMD-0272

2 Installatie

Read this manual carefully	WarningRead this manual carefully before starting the water heater. Failure to read the manual and to follow the printed instructions may lead to personal injury and damage to the water heater.
	Copyright © 2011 A.O. Smith Water Products CompanyAll rights reserved.Nothing from this publication may be copied, reproduced and/or published by means of printing, photocopying or by whatsoever 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.
Trademarks	Any brand names mentioned in this manual are registered trademarks of their respective owners.
Liability	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.
More information	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:PO Box 705500 AB VeldhovenThe NetherlandsTelephone: (free) 0870 - AOSMITH0870 - 267 64 84General: [phone]Fax: [phone]E-mail: [e-mail]: www.aosmith.co.ukIn the event of problems with your gas, electricity or water supply connections, please contact the supplier/installation engineer of your installation.

IT 400 / 500 / 600 / 750 / 1000

Table of contents

1 Technical specifications 23

1.1 Floor load 23
1.2 Water composition 23
1.3 Working clearance 23
1.4 General specifications 23
1.5 Dimensions 24

2 Installation 25

2.1 Installation diagram 25
2.2 Unvented water connections 26
2.3 Vented water connections 26

3 Maintenance 29

3.1 Preparation for maintenance 29
3.2 Water-side maintenance 29

4 Warranty 31

4.1 General warranty 31
4.2 Tank warranty 31
4.3 Conditions for installation and use 31
4.4 Exclusions 31
4.5 Scope of warranty 32
4.6 Claims 32
4.7 Obligations of A.O. Smith 32

IT 400 / 500 / 600 / 750 / 1000

1 Technical specifications

1.1 Floor load

Allow for the water heater's weight and the maximum floor load; refer to the table (1.4 "General specifications").

1.2 Water composition

The water heater 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 °dHFranch hardness >10,0 °fHEnglish hardness >7,0 °eH
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").

1.3 Working clearance

For access to the water heater, it is recommended that the following clearances are observed:

• around the anode connection: 100 cm.
• around the water heater: 50 cm.
• top of the water heater: 50 cm

1.4 General specifications

Unit IT 400 IT 500 IT 600 IT 750 IT 1000
Contents liters	385	473	643	725	1007
Empty weight	kg	139	180	241	254	336
Max. operating pressure tank	kPa (bar)	1000 (10)	1000 (10)	1000 (10)	1000 (10)	1000 (10)
Max. operating pressure heat excahnger	kPa (bar)	1600 (16)	1600 (16)	1600 (16)	1600 (16)	1600 (16)
Max. water temperature tank	°C	95	95	95	95	95
Max. water temperature heat excahnger	°C	110	110	110	110	110
Anodes	-	1	1	1	1	1
Capacity heat exchanger	kW	78	100	104	112	145
Primary flow 80/60°C	l/h	3354	4300	4472	4816	6235
Pressure loss	mbar	244	489	104	128	259
Heat exchange surface	m^2	2,45	3,11	3,45	3,72	4,82

1.5 Dimensions

Unit	IT 400	IT 500	IT 600	IT 750	IT 1000
A	Total height					mm	1705	2040	1835	2030	2000
D	Diameter mm					720	720	910	910	1060
G	Height heat exchanger					outlet		mm	255	255	305
H	Height heat exchanger inlet					mm	1010	1205	1145	1205	1305
M	Height cold water inlet					mm	70	70	85	85	95
N	Height warm water outlet					mm	mm	mm	1650	1990	1795
O	Diameter inspection					opening	mm	115	115	180	180
P	Height inspection					opening	mm	330	330	415	415
R	Height top temp. sensor					sensor	connection	mm	500	500	650
S	Height recirculationconnection					mm	1095	1290	1235	1295	1395
T	Height bottom temp. sensor/T&P					mm	1360	1700	1475	1670	1600
1	Cold water inlet					-	R 2	R 2	R 212	R 212	R 212
2	Warm water outlet					-	R 2	R 2	R 212	R 212	R 212
3	Heat exchanger outlet					-	Rp 1	Rp 1	Rp 1	Rp 114	Rp 114
4	Heat exchanger inlet					-	Rp 1	Rp 1	Rp 1	Rp 114	Rp 114
7a	Bottom temp. sensor connection					-	Rp 34	Rp 34	Rp 34	Rp 34	Rp 34
7b	Recirculation connection					-	Rp 34	Rp 34	Rp 34	Rp 34	Rp 34
7c	Top temp. sensor/T&P connection					-	Rp 34	Rp 34	Rp 34	Rp 34	Rp 34
8	Anode connection					-	Rp 114	Rp 114	Rp 114	Rp 114	Rp 114

IMD-0272

2 Installation

2.1 Installation diagram This figuur shows the installation diagram. This diagram is referred to in the sections describing the actual connection procedure.

VENTED

UNVENTED

IMD-0450 IMD-0449

Legend

1. pressure relief valve
   (mandatory if mains pressure is too high)
2. T&P-valve (mandatory)
3. stop valve (recommended)
4. non-return valve (mandatory)
5. circulation pump (optioneel)

6. drain valve

7. service stop valve

water12. temperature gauge (optional)

1. draw-off points
2. expansion valve (mandatory)
3. espansion vessel (mandatory)
4. 3-way aeration valve (recommended)
5. cold water head tank
6. float switch

A. cold water supply
B. hot water supply
C. circulation pipe
E. overflow pipe
F. inlet heat exchanger
G. outlet heat exchanger
H. overflow protection

2.2 Unvented water connections

Warning

The installation should be carried out by a competent person, in compliance with general and locally applicable regulations.

2.2.1 Cold water side

See (A) in the installation diagram (2.1 "Installation diagram").

1. Fit an approved stop valve (4) on the cold water side as required by the applicable regulations.
2. The maximum working pressure of the water heater is 8 bar. Because the pressure in the water pipe at times can exceed 8 bar, you must fit an approved pressure-reducing valve (1).
3. Fit a non-return valve (5) and an expansion vessel (16).
4. Fit an expansion valve (15) and connect the overflow side to an open waste water pipe.

2.2.2 Hot Water side

See (B) in the installation diagram (2.1 "Installation diagram").

Note

Insulating long hot water pipes prevents unnecessary energy loss.

1. Optional: fit a temperature gauge (12) so you can check the temperature of the tap water.
2. Fit the T&P valve (3).
3. Fit a stop valve (11) in the hot water outlet pipe for servicing.

2.2.3 Circulation pipe

See (C) in the installation diagram (2.1 "Installation diagram").

If an immediate flow of hot water is required at draw-off points, a circulation pump can be installed. This improves comfort, and reduces water wastage.

1. Fit a circulation pump (6) of the correct capacity for the length and resistance of the circulation system.
2. Fit a non-return valve (5) after the circulation pump to guarantee the direction of circulation.
3. Fit two stop valves for servicing (4).
4. Connect the circulation pipe according to the installation diagram (2.1 "Installation diagram").

2.3 Vented water connections

Warning

The installation should be carried out by a competent person, in compliance with general and locally applicable regulations.

2.3.1 Cold water side

See (A) in the installation diagram (2.1 "Installation diagram").

1. Fit an approved stop valve (4) on the cold water side between the cold water head tank and the water heater, as required by the applicable regulations.

2.3.2 Hot Water side

See (B) in the installation diagram (2.1 "Installation diagram").

Note

Insulating long hot water pipes prevents unnecessary energy loss.

1. Optional: fit a temperature gauge (12) so you can check the temperature of the tap water.
2. Fit the T&P valve (3).
3. Fit a stop valve (4) in the hot water outlet pipe for servicing.
4. If a circulation pipe is required, continue by installing the circulation pipe (2.3.3. "Circulation pipe").

2.3.2 Circulation pipe

See (C) in the installation diagram (2.1 "Installation diagram").

If an immediate flow of hot water is required at draw-off points, a circulation pump can be installed. This improves comfort, and reduces water wastage.

1. Fit a circulation pump (6) of the correct capacity for the length and resistance of the circulation system.
2. Fit a non-return valve (5) after the circulation pump to guarantee the direction of circulation.
3. Fit two stop valves for servicing (4).
4. Connect the circulation pipe according to the installation diagram (2.1 "Installation diagram").

IT 400 / 500 / 600 / 750 / 1000

3 Maintenance

Warning

Maintenance may only be carried out by a competent person.

At each service, the water heater undergoes maintenance on water side. The maintenance must be carried out in the following order.

1. Preparation for maintenance
2. Water-side maintenance
3. Finalizing maintenance

Note

Before ordering spaer parts, it is important to write down the installation type, water heater model and the full serial number of the water heater. These details can be found on the rating plate. Only by ordering with this information can you be sure receive the correct spare parts.

3.1 Preparation for maintenance

The preparation for maintenance consists out of testing and checking if all components are still working properly, complete the following steps:

1. Test the operation of the overflow valve of the protected cold supply setup. The water should purt out.
2. Check the drainage pipes from the discharge points of all valves and remove any scale deposits that may be present.
3. Drain the water heater.

3.2 Water-side maintenance

Water-side maintenance consists of descaling and cleaning the tank and checking the anodes.

3.2.1 Descaling and cleaning the tank

Scale and lime build-up prevent effective conduction of the heat to the water. Periodic cleaning and descaling prevents build-up of these deposits. This increases the service life of the water heater, and also improves the heating process.

Take the rate of scale formation into account when deciding on the service interval. Scale formation depends on the local water composition, the water consumption and the water temperature setting. A water temperature setting of maximum 60°C is recommended for the prevention of excessive scale build-up.

To guarantee a good, watertight seal around the cleaning opening, replace the gasket, washers, bolts and, if necessary, the lid with new parts before reassembly. Spare parts are obtainable from the supplier/manufacturer.

To simplify descaling and cleaning of the tank, the water heater is equipped with a cleaning opening.

Work order:

1. Undo bolts from the cover.
2. Remove cover and the gasket.
3. Inspect the tank and remove the losse scale deposits and contamination.
4. If the scale cannot be removed by hand, descale the water heater with a desclaing agent. Contact the supplier/manufacturer for advice on what descaling agent to use.
5. Close the cleaning opening. To avoid damage to the tank, tignten the bolts, that fasten te lid, with a torque no greater than 50 Nm. Use suitable tools for this.

3.1.2 Checking anodes

Anodes ensure the protection of the tank by sacrificing themselves. Insufficient anode material may lead to poor protection and, hence, leakage of the tank.

1. Loosen the anodes one by one.
2. Check the diameter of each anode in different places. The diameter must be at least 60% of the original diameter.
3. If the diameter is less than the minimum, the anode must be replaced. Please contact the supplier/manufacturer for ordering new anodes.
4. Mount the (new) anodes.

4 Warranty

4.1 General warranty

If within one year of the original installation date of a water heater supplied by A.O. Smith, following verification, and at the sole discretion of A.O. Smith, an assembly or part (with exclusion of the tank) proves to be defective or fails to function correctly due to manufacturing and/or material defects, then A.O. Smith shall repair or replace this assembly or part.

4.2 Tank warranty

If within 3 years of the original installation date of a water heater supplied by A.O. Smith, following verification, and at the sole discretion of A.O. Smith, the glass-lined steel tank proves to be leaking due to rust or corrosion occurring on the water side, then A.O. Smith shall offer to replace the defective water heater with an entirely new water heater of equivalent size and quality The warranty period given on the replacement water heater shall be equal to the remaining warranty period of the original water heater that was supplied. Notwithstanding that stated earlier in this article, in the event that unfiltered or softened water is used, or allowed to stand in the water heater, the warranty shall be reduced to one year from the original installation date.

4.3 Conditions for installation and use

The warranty set out in articles 1 and 2 will apply solely under the following conditions:

a. The water heater is installed under strict adherence to A.O. Smith installation instructions for the specific model, and the relevant government and local authority installation and building codes, rules and regulations in force at the time of installation.

b. The water heater remains installed at the original site of installation.

c. The water heater is used exclusively with drinking water, which at all times can freely circulate (a separately installed heat exchanger is mandatory for heating saline water or corrosive water).

d. The tank is safeguarded against harmful scaling and lime build-up by means of periodic maintenance.

e. The water temperatures in the heater do not exceed the maximum setting.

f. The water pressure and/or heat load do not exceed the maximum values stated on the water heater rating plate.

g. The water heater is installed in a non-corrosive atmosphere or environment.

h. The water heater is connected to a protected cold supply arrangement, which is: approved by the relevant authority; with sufficient capacity for this purpose; supplying a pressure no greater than the working pressure stated on the water heater; and where applicable by a likewise approved temperature and pressure relief valve, fitted in accordance with installation instructions of A.O. Smith applying to the specific model of water heater, and further in compliance with the government and local authority installation and building codes, rules and regulations.

i. The water heater is at all times fitted with cathodic protection. If sacrificial anodes are used for this, these must be replaced and renewed when, and as soon as, they are 60% or more consumed. When power anodes are used, it is important to ensure that they continue to work properly.

4.4 Exclusions

The warranty set out in articles 1 and 2 will not apply in the event of:

a. damage to the water heater caused by an external factor;

b. misuse, neglect (including frost damage), modification, incorrect and/or unauthorised use of the water heater and any attempt to repair leaks;

c. contaminants or other substances having been allowed to enter the tank;

d. the conductivity of the water being less than 125 S/cm and/or the hardness (alkaline-earth ions) of the water being less than 1.00 mmol/lit

e. unfiltered, recirculated water flowing through or being stored in water heater;

f. any attempts at repair to a defective water heater other than by an approved service engineer.

4.5 Scope of the warranty	The obligations of A.O. Smith pursuant to the specified warranty are limited to free delivery from the warehouse of the replacement assemblies, parts or water heater, respectively. Shipping, labour, installation and any other costs associated with the replacement will not be accepted by A.O. Smith.
4.6 Claims	A claim on grounds of the specified warranty must be submitted to the dealer from whom the water heater was purchased, or to another authorised dealer for A.O. Smith Water Products Company products. Inspection of the water heater as referred to in articles 1 and 2 shall take place in one of the laboratories of A.O. Smith.
4.7 Obligations of A.O. Smith	A.O. Smith grants no other warranty or guarantee over its water heaters nor the (assemblies or parts of) water heaters supplied for replacement, other than the warranty expressly set out in this Certificate.
	Under the terms of the supplied warranty, A.O. Smith is not liable for damage to persons or property caused by (assemblies or parts, or the glass-lined steel tank of) a (replacement) water heater that it has supplied.

IT 400 / 500 / 600 / 750 / 1000

IT 400 / 500 / 600 / 750 / 1000

A.O. Smith Water Products Company

Case postale 70

5500 AB Veldhoven

Pays-Bas

Téléphone (gratis) 008008 - AOSMITH

08008 - 267 64 84

Général: [phone]

Fax: [phone]

E-mail: [e-mail]

IMD-0272

2 Installation

2.2 Raccordement hydraulique

Avertissement

4.7 Obligations de A.O. Smith