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1.4 Technical specifications

 

 
 
 

  

  

  

ST 1500/2000  ST 2500/3000

1 Storage 

capacity 

ltr 

1500/2000 2500/3000 

Tank heat loss 

kWh/24h

8.5 10.1 

3 Maximum 

working 

pressure 

bar 

7 7 

Test pressure tank 

bar 

12 12 

Maximum allowed tank temperature 

°C 

95 95 

6 Weight 

empty 

kg 

374/506 637/739 

 
 
 
 
 
 

2.  FOR THE INSTALLER 

 
2.1 Installation 

A qualified, competent installer must install the hot water storage tanks in accordance 
with local valid regulations and codes. 
 Location needs to be chosen to prevent damage in case of tank leakage (e.g. place tank in 
a drain pan or near a floor drain of sufficient capacity). For mounting of the jacket see 
separate attached Kit installation sheet. 
 

2.2 Water connections 

The water heater is suitable for connection to vented, un-vented and pumped pressurized 
systems. In each case appropriate valves and fittings should be used to ensure the system 
complies with the governing codes and appropriate building requirements. The maximum 
working pressure is 7 bars. A typical installation diagram for an un-vented installation is 
as follows: 
 

 

4

Summary of Contents for ST 1500

Page 1: ...s water heater please read the installation instructions An authorized installer must install the heater and commission it according to the local valid requirements A O SMITH CANNOT ACCEPT ANY RESPONS...

Page 2: ...hutting down 7 2 5 Maintenance 7 2 5 1 Anode 7 2 5 2 Descaling 7 2 6 Spare parts 8 3 FOR THE END USER 3 1 Filling the heater 8 3 2 Start up of the water heater 8 3 3 Shutting down 8 3 4 Maintenance 8...

Page 3: ...laceable insulation jacket minimizes heat loss 1 2 Controls ST models are supplied without controls 1 3 Dimensions ST 1500 2000 ST 2500 3000 Connection sizes 1 Inlet 2 2 2 Outlet 2 2 3 4 5 Anode 3 4 3...

Page 4: ...lations and codes Location needs to be chosen to prevent damage in case of tank leakage e g place tank in a drain pan or near a floor drain of sufficient capacity For mounting of the jacket see separa...

Page 5: ...tion pump sanitary water 6 temperature sensor for boiler three way valve A circulation line B warm water C cold water E boiler water hot F boiler water return Optional backup elements are available fo...

Page 6: ...ined by the quality and quantity of the water flowing through the heater Therefore we recommend the anodes to be checked regularly preferably simultaneously with an internal inspection of the glass li...

Page 7: ...Filling the tank 1 Check if drain valve is closed if mounted 2 Open the cold water tap to the heater and all hot water outlets in order to bleed all air from the system The heater is filled when cold...

Page 8: ...have been met a The tank is installed in accordance with A O Smith s installation instructions for that specific model as well as the local installation and building regulations and all relevant rule...

Page 9: ...ectively A O Smith is not liable for carriage labor installation and other costs relating to the replacement 4 6 Claims Any claim under this warranty must be filed with the dealer who originally sold...

Page 10: ...tents of flange kit Bag A Flange plate Designation Quantity Bolts 6 Gasket 1 Flange plate 1 Bag D 1 Bag D Flange collar and cover fixation screws and brackets Designation Quantite Brackets 3 Parker sc...

Page 11: ...e tank Mounting of the flange covers and jacket MUST be done in the indicated sequence For further information please refer to the installation manual 0307138RO Bag D fixing bracket for clean out coll...

Page 12: ...ible jacket Install the flexible jacket before mounting the clean out collar and cover The collar serves as mould to cut the required opening in the jacket In case the zipper is difficult to close it...

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