IT 2500 - Boiler A.O. Smith - Free user manual and instructions

Product type	Storage water heater for domestic hot water
Brand	A.O. Smith
Model	IT 2500
Capacity	2550 litres
Empty weight	576 kg
Maximum floor load	3126 kg
Total height	1989 mm
Diameter	1500 mm
Maximum operating pressure of the tank	800 kPa (8 bar)
Maximum operating pressure of the heat exchanger	600 kPa (6 bar)
Maximum temperature of the tank	85 °C
Maximum temperature of the heat exchanger	90 °C
Number of anodes	3
Coil capacity	156 kW
Primary flow rate (80/60 °C)	6871 l/h
Pressure loss	695 mbar
Coil surface area	6.0 m²
Cold water supply connection	R 2
Hot water outlet connection	R 2
Heat exchanger inlet connection	Rp 1 1/4
Heat exchanger outlet connection	Rp 1 1/4
Recirculation connection	Rp 1 1/4
T&P valve connection	Rp 1
Anode connection	Rp 3/4
Supply	Potable water, hydraulic connection and heat exchanger
Maintenance and cleaning	Periodic descaling, anode inspection, replacement of seals after opening
Safety	Mandatory safety group, recommended thermal valve, cathodic protection by anodes
Spare parts and repairability	Spare parts available from the manufacturer, need to specify type and serial number
General information	Installation by approved installer, maintenance by professional, 3-year warranty on the tank under conditions

Frequently Asked Questions - IT 2500 A.O. Smith

What is the capacity of the A.O. Smith IT 2500?

The capacity is 2550 litres. This corresponds to a large tank suitable for high hot water demands.

What connections are necessary for installation?

The main connections are: cold water supply (R 2), hot water outlet (R 2), heat exchanger inlet and outlet (Rp 1 1/4), recirculation (Rp 1 1/4), T&P valve (Rp 1) and anodes (Rp 3/4). A safety group is mandatory on the cold water side.

What is the maximum operating pressure of the tank and heat exchanger?

The maximum pressure of the tank is 800 kPa (8 bar) and that of the heat exchanger is 600 kPa (6 bar). These values must not be exceeded.

How to maintain the A.O. Smith IT 2500?

Maintenance must be carried out by an approved professional. It includes periodic descaling of the tank, inspection and replacement of anodes if their diameter is less than 60% of the original, and checking of seals. The set temperature must not exceed 60°C to limit scale.

What is the warranty on this water heater?

The general warranty is one year on parts, and the warranty on the vitrified steel tank is three years from the date of installation, subject to installation and usage conditions. In case of softened water, the tank warranty is reduced to one year.

How to descale the tank?

Descaling is done through the cleaning opening. After removing the bolts, cover and gasket, manually remove the scale. If necessary, use a suitable descaling agent. Close with a maximum tightening torque of 50 Nm and replace gaskets and bolts.

What are the anodes for and when should they be replaced?

The anodes ensure cathodic protection of the tank by sacrificing themselves. They must be checked regularly and replaced as soon as their diameter is less than 60% of the original diameter. A worn anode can lead to corrosion of the tank.

What are the required water conditions for proper operation?

Water must be potable, with a hardness greater than 1.00 mmol/l (i.e. 10 °fH), a conductivity greater than 125 μS/cm and a pH between 7.0 and 9.5. Water that is too soft or too acidic may void the tank warranty.

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

No, it is strictly forbidden to install a shut-off valve or check valve between the inlet combination (safety group) and the appliance. This would compromise safety.

How to optimize energy consumption with this model?

Set the water temperature to 60°C maximum to limit scale and heat loss. Insulate long hot water pipes. Use a circulation pump for immediate comfort without water waste.

USER MANUAL IT 2500 A.O. Smith

White cylindrical device with black buttons and a circular button, no visible text or symbols

Installation, User and Service

Manual

Inhoudsopgave / Table of contents / Table des matières

NL

This manual consists of 3 languages.

1 - NL Handleiding IT 1500 t/m 3000 5
2 - UK Manual IT 1500 trough 3000 19
3 - FR Notice IT 1500 à 3000 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

2 12 10 3 11 A 10 U V N 7 H 8 10 O 4 S T P G 1 M D

IMD-0638

2 Installatie

Belangrijk

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 1500 / 2000 / 2500 / 3000

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 1500 / 2000 / 2500 / 3000

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 °dHFrench hardness >10,0 °fHEnglish hardness >7,0 °eH>100 mg/l CaCO_3
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 1500 IT 2000 IT 2500 IT 3000
Contents	litres	1550 1800	2550 2800
Empty weight	kg	398	426	576	600
Max. floor load	kg	1948 2226	3126 3400
Max. operating pres. tank	kPa (bar)	800 (8)	800 (8)	800 (8)	800 (8)
Max. operating pres. heat exchanger	kPa (bar)	600 (6)	600 (6)	600 (6)	600 (6)
Max. water temp. tank	°C	85	85	85	85
Max. water temp. heat exchanger	°C	90	90	90	90
Anodes	-	3	3	3	3
Capacity heat exchanger	kW	147	147	156	156
Primary flow 80/60°C	l/h	6485 6485	6871 6871
Pressure loss	mbar	830	830	695	695
Heat exchange surface	m^2	5,2	5,2	6,0	6,0

1.5 Dimensions

Unit	IT 1500 IT 2000 IT 2500 IT 3000
A Total height (incl. isolation) mm 1930 2118 1989 2118
D Diameter (incl. isolation) mm 1200 1200 1500 1500
G Height heat exchanger outlet mm 350 350 430 430
H Height heat exchanger inlet mm 1305 1305 1283 1283
M	Height cold water inlet	mm 135 135 183 183
N Height warm water outlet	mm 1930 2118	1989 2118
O	Diameter inspection opening	mm	110	110	110	110
P Height inspection opening	mm 425 425 510 510
S Height connection bottom temp. sensor	mm 605 605 685 685
T Height recirculation connection	mm 710 710 790 790
U Height T&P connection	mm 1515 1703	1530 1624
V Height top temp. sensor connection	mm 1550 1738	1530 1659
1	Cold water inlet	-	R 2	R 2	R 2	R 2
2	Warm water outlet	-	R 2	R 2	R 2	R 2
3	Heat exchanger inlet	-	Rp 114	Rp 114	Rp 114	Rp 114
4	Heat exchanger outlet	-	Rp 114	Rp 114	Rp 114	Rp 114
7	Recirculation connection	-	Rp 114	Rp 114	Rp 114	Rp 114
8	Bottom temp. sensor connection	-	Rp 34	Rp 34	Rp 34	Rp 34
10	Anode connections	-	Rp 34	Rp 34	Rp 34	Rp 34
11	T&P connection	-	Rp 1	Rp 1	Rp 1	Rp 1
12	Top temp. sensor connection	-	Rp 34	Rp 34	Rp 34	Rp 34

2 12 10 11 3 10 U V N 7 8 10 O 4 S T P 2 G 1 M D

IMD-0638

2 Installation

Important

Three anodes are delivered with the storage tank. Mount the anodes with a liquid sealant in the right connections (10) before installation. When anodes are not mounted during operation, all warranty conditions are void.

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

VENTED UNVENTED

17 H A 4 19 E 18 12 11 B 14+ 14+ 14+ 3 F C 4 5 6 4 G 9 H 4

IMD-0640

12 11 B 3 F 4 5 6 4 C G 16 15 9 H 5 1 4 A

IMD-0641

Legend

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

6. drain valve

7. service stop valve

8. temperature gauge (optional)
9. draw-off points
10. expansion valve (mandatory)
11. expansion vessel (mandatory)
12. 3-way aeration valve (recommended)
13. cold water head tank
14. 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	WarningThe installation should be carried out by a competent person, in compliance with general and locally applicable regulations.
2.2.1	Cold water sideSee (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 sideSee (B) in the installation diagram (2.1 "Installation diagram").
	NoteInsulating 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 pipeSee (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	WarningThe installation should be carried out by a competent person, in compliance with general and locally applicable regulations.
2.3.1	Cold water sideSee (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 1500 / 2000 / 2500 / 3000

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 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.

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 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.

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 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.

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 the 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.

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]

2.2 Raccordement hydraulique

Avertissement

4.7 Obligations de A.O. Smith