AO Smith IT 300 Storage Indirect Water Heater User Guide

AO Smith IT 300 Storage Indirect Water Heater

Product Information

Specifications

• Model: IT 300
• Manufacturer: AO Smith
• Language: Multilingual (NL, EN, FR)
• Version: R1.0 1019

Frequently Asked Questions

• Q: How do I adjust the temperature on the IT 300?
  • A: You can adjust the temperature by using the control panel on the unit. Refer to the user manual for detailed instructions.
• Q: What should I do if I encounter an error code?
  • A: If you see an error code on the display, refer to the troubleshooting section of the manual for guidance on resolving the issue. If the problem persists, contact AO Smith Water Products Company for assistance.
• Q: How often should I perform maintenance on the IT 300?
  • A: Regular maintenance is essential for optimal performance. Refer to the maintenance schedule provided in the manual for guidance on when to perform maintenance tasks.

Information

Read this manual carefully

Warning

Read 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 © 2017 A.O. Smith Water Products Company

All 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 7
• 5500 AB Veldhoven The Netherlands
• Telephone: (free) 0870 – AOSMITH
  • 0870 – 267 64 84
• General: +31 40 294 25 00
• Fax: +31 40 294 25 39
• E-mail: [email protected]
• Website: www.aosmith.co.uk

In the event of problems with your gas, electricity or water supply connections, please contact the supplier/installation engineer of your installation.

Technical specifications

Floor load

• Allow for the water heater’s weight and the maximum floor load; refer to the table (1.6 “General specifications”).

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 °dH

· French hardness > 10,0 °fH

· English hardness > 7,0 °eH

· > 100 mg/l 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”).

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

Packaging

The packaging prevents damage to the appliance during transport.
The packaging material chosen is environmentally friendly, recyclable and relatively easy to dispose of in an environmentally aware way.

Disposal

Old end-of-life appliances contain materials that need to be recycled. When disposing of old devices that have reached the end of their service life, you should take account of local legislation relating to waste disposal.
You must therefore never dispose of your old appliance together with regular waste, but should and it into a municipal waste collection depot for electrical and electronic equipment. Ask your dealer/installation engineer for advice if necessary. The old appliance must be stored out of reach of children.

General specifications

Dimensions

Front sectional view of the appliance

Installation

Installation diagram

This figure shows the installation diagram. This diagram is referred to in the sections describing the actual connection procedure.

Legend

1. 1. pressure relief valve
   • (mandatory if mains water pressure is too high)
2. 3. T&P-valve
3. 4. stop valve (recommended)
4. 5. non-return valve (mandatory)
5. 6. circulation pump (optional)
6. 9. drain valve
7. 11. service stop valve
8. 12. temperature gauge (optional)
9. 14. draw-off points
10. 15. expansion valve (mandatory)
11. 16. expansion vessel (mandatory)
12. A. cold water supply
13. B. hot water supply
14. C. circulation pipe
15. F. inlet heat exchanger
16. G. outlet heat exchanger

Water connections

Warning

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

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 10 bar. Because the pressure in the water pipe at times can exceed 10 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 wastewater pipe.

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.

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”).

Filling And Draining

Legend

• 1. pressure relief valve
  • (mandatory if mains water pressure is too high)
• 3. T&P-valve
• 4. stop valve (recommended)
• 5. non-return valve (mandatory)
• 6. circulation pump (optional)
• 9. drain valve
• 11. service stop valve
• 12. temperature gauge (optional)
• 14. draw-off points
• 15. expansion valve (mandatory)
• 16. expansion vessel (mandatory)
• A. cold water supply
• B. hot water supply
• C. circulation pipe
• F. inlet heat exchanger
• G. outlet heat exchanger

Filling

To fill the water heater, proceed as follows:

1. Open the stop valve (11) in the hot water pipe and, if present, the stop valves (4) for the circulation pump (6).
2. Close the drain valve (9).
3. Open the nearest hot water draw-off point (14).
4. Open the stop valve (4) on the cold water side (A) so that cold water flows into the water heater.
5. Completely fill the water heater. When a full water jet flows from the nearest draw-off point, the water heater is full.
6. Bleed the entire installation of air, for example by opening all draw-off points.
7. The water heater is now under water supply pressure. There should now be no water coming out of the inlet combination expansion valve or (if used) out of the T&P valve (3). If there is, the cause might be:
   • The water supply pressure is greater than the specified value (1.6 “General specifications”). Rectify this by fitting a pressure-reducing valve (1).
   • The expansion valve in the protected cold supply set-up is defective or incorrectly fitted.

Draining

1. Close the stop valve (4) between the cold water head tank and the cold water inlet (A).
2. Open the drain valve (9).
3. Bleed the water heater (or installation) so that it drains completely.

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 spare 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 receiving the correct spare parts.

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 discharge 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.

Water-side maintenance

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

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 loose scale deposits and contamination.
4. If the scale cannot be removed by hand, descale the water heater with a descaling agent. Contact the supplier/manufacturer for advice on what descaling agent to use.
5. Close the cleaning opening. To avoid damage to the tank, tighten the bolts that fasten the lid, with a torque no greater than 50 Nm. Use suitable tools for this.

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.

Warranty

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.

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 glasslined steel tank proves to be leaking due to rust or corrosion occurring on the waterside, 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.

Conditions for installation and use

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

• 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.
• The water heater remains installed at the original site of installation.
• 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).
• The tank is safeguarded against harmful scaling and lime build-up by means of periodic maintenance.
• The water temperatures in the heater do not exceed the maximum setting.
• The water pressure and/or heat load do not exceed the maximum values stated on the water heater rating plate.
• The water heater is installed in a non-corrosive atmosphere or environment.
• 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.
• 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.

Exclusions

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

• damage to the water heater caused by an external factor;
• misuse, neglect (including frost damage), modification, incorrect and/or unauthorised use of the water heater and any attempt to repair leaks;
• contaminants or other substances having been allowed to enter the tank;
• the conductivity of the water being less than 125 μS/cm and/or the hardness (alkaline-earth ions) of the water being less than 1.00 mmol/lit
• unfiltered, recirculated water flowing through or being stored in the water heater;
• any attempts at repair to a defective water heater other than by an approved service engineer.

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.

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.

Obligations of A.O. Smith

A.O. Smith grants no other warranty or guarantee over its water heaters, not 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.

Contacts

A.O. Smith Hoofdkantoor Europa

• De Run 5305
• Postbus 70 5500 AB Veldhoven Nederland
• T : +31 (0)40 294 2500
• T : 0800 267 6484 (gratis)
• [email protected]
• www.aosmith.nl

A.O. Smith Water Heaters

• Unit B7-B8 Armstong Mall
• Southwood Business Park Farnborough Hampshire GU14 ONR UK
• T : 0870 267 6484
• [email protected]
• www.aosmith.co.uk

A.O. Smith Europe

• De Run 5305
• PO Box 70 5500 AB Veldhoven The Netherlands

A.O. Smith siège social Europe

• De Run 5305
• Boîte postale 70
• 5500 AB Veldhoven Pays-Bas

Scan

Data is subject to change.

References

• Adveco | Commercial Hot Water Systems and Renewables
• Innovation has a name - A.O. Smith
• Innovation has a name - A.O. Smith

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