A.O. Smith ST 1500 User's Manual
Contents
1. imposed by the authorities h The anodes have been inspected and renewed when worn for 60 or more 4 4 Exclusions The warranty ensuing from sections 4 1 and 4 2 will be null and void a Ifthe tank has been damaged by external causes b In case of misuse neglect including frost damage incorrect or improper use of the tank or if attempts have been made to repair leaks c In the case of ingress of contaminants or other particles into the tank d Ifthe water conductivity is less than 150 uwS cm and or the degree of water hardness is less than 6 DH 75 ppm e Ifunfiltered recycled water flows through the tank or is stored in the tank 4 5 Scope of the warranty A O Smith s obligations ensuing from this warranty are limited to the free delivery ex Veldhoven store of the parts or the tanks respectively 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 the tank or with any other dealer or supplier of A O Smith s products The examination of the tank pursuant to sections 4 1 and 4 2 will be carried out at A O Smith discretion 4 7 No other obligations for A O Smith than those stated in this manual With respect to the tank respectively the tanks or parts or components thereof supplied as a replacement A O Smith will grant no other warranty or guarantee than the warranty detailed2. INSTALLATION INSTRUCTIONS AND USERS MANUAL HOT WATER STORAGE TANKS MODEL ST 1500 3000 FOREWORD Before attempting to install this 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 RESPONSIBILITY FOR GUARANTEE SERVICE AND OR PRODUCT LIABILITY IN THE EVENT OF UNAUTHORIZED CHANGES PRODUCT MODIFICATIONS OR REPAIRS CONTENTS 1 GENERAL 1 1 Description of the heater 1 2 Controls 1 3 Dimensions 1 4 Technical data 2 FOR THE INSTALLER 2 1 Installation 2 2 Water connections 2 3 Commissioning 2 3 1 Filling the heater 2 3 2 Heater start up 2 4 Shutting down 2 5 Maintenance 2 5 1 Anode 2 5 2 Descaling 2 6 Spare parts 3 FOR THE END USER 3 1 Filling the heater 3 2 Start up of the water heater 3 3 Shutting down 3 4 Maintenance 4 WARRANTY 4 1 Warranty in general 4 2 Warranty of the tank 4 3 Conditions for installation and use 4 4 Exclusions 4 5 Scope of the warranty 4 6 Claims 4 7 No other obligations for A O Smith than those stated in this manual OONNANNAINANANANNANADNMN nN W WwW LW OO OO O0 OC 1 GENERAL 1 1 Description of the heater Construction of the heater 1s in accordance with the European standard for water heaters or sanitary use The heaters are suitable for use with a working pressure of up to 7 bar The cylindrical tank is made from sheet
3. above A O Smith will not be liable by virtue of this warranty or otherwise for damage to any persons or property caused by parts or components respectively the steel glass lined tank supplied by them This warranty applies to the following models ST 1500 3000 ST 1500 3000 series Kit installation instructions 1 Contents 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 screws 5 Flange collar and cover Installation manuals 10 2 Mounting instructions for flange covers anodes T amp P and insulation package IMPORTANT Start with mounting two plug anodes in the lower and center anode opening on the side of the tank In the top anode opening you need to mount the outlet anode with T piece for T amp P relieve valve included and thermometer not included Make sure that anodes are mounted water tight but do make good contact with the metal of the 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 collar and cover Item Designation Quantity 1 Bracket 3 Bag A flange cover Item Designation Quantity 2 Bolds 6 3 Gasket 1 4 Steel flange cover 1 5 Nuts 6 I I In case the unit is supplied with a flexib
4. e jacket see separate attached Kit installation sheet 2 2 Water connections The water heater 1s 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 E A ant i ra 2 5 3 F E up d element i 1 C hed 2 3 1 drain on small tanks only 2 valve 3 check valve 4 pressure relive valve 5 circulation 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 for field installation up to 6 kW input Models with fixed internal heat exchanger are also available 2 3 Commissioning 2 3 1 Filling the tank 1 Check if any installed drain valve is closed Open the cold water supply valve to the heater 3 Open all hot water outlets in order to bleed all air from the system The heater 1s filled when cold water runs out of all outlets 4 Close all hot water taps 2 3 2 Start up Check 1f the heater is filled with water and that the primary system is ready Open water supply and return valves 2 4 Shutting down For longer periods 1 Close the cold water tap 1 Ifthere is an
5. emains in the tank 4 3 Conditions for installation and use The warranty ensuing from sections 4 1 and 4 2 will only be valid 1f the following conditions 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 rules and regulations imposed by the authorities The tank remains installed in the original installation location c Exclusively potable water free to circulate at all times is used for heating salty or corrosive water a separately installed heat exchanger is mandatory The tank is free of damaging scale deposits due to periodic maintenance e The water pressure and or water temperature does not exceed the maximum values stated on the water heater s type plate and or in this manual f The tank is located in a non corrosive atmosphere or area The tank is fitted with an expansion tank or inlet unit that is approved by the relevant authorities that is of sufficient capacity not exceeding the working pressure rating as indicated on the tank the tank is possibly also fitted with a temperature and pressure relief valve that 1s approved by the relevant authorities and that has been fitted in accordance with A O Smith s installation instructions for that specific water heater model and furthermore the local installation and building regulations and all relevant rules and regulations
6. g is located at the front for inspecting and descaling the tank The clean out opening can be reached via the cover plate on the outer jacket of the tank Empty the tank before opening the clean out opening Descaling must be carried out with suitable descaling agents which can be ordered form A O Smith distributors To ensure that the clean out cover is watertight the flange gasket should be replaced after every inspection 2 6 Spare parts It is important to mention the tank type model and full serial number when ordering spare parts The spare parts can be determined on the basis of these numbers 3 FOR THE END USER Warning An accredited installer must install the tank and perform start up of the system 3 1 Filling the tank 1 Check if drain valve is closed if mounted 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 water runs out of all outlets 3 Close all taps at the hot water outlet points The tank is now under water mains pressure At this pressure the pressure relief valve must not release any water 3 2 Start up of the system 1 Check if the heater is filled with water and that the primary system 1s ready 2 Set the controls on the primary circuit t of the boiler to the required sanitary water temperature 3 Open boiler supply and return valves if installed 3 3 Shutting down For longer periods 1 Close the cold wa
7. le insulation jacket now start mounting the insulation see overleaf If the insulation is of the rigid type proceed as follows Bag D Mounting of clean out collar and cover Item Designation Quantity 6 parker screws 5 11 3 Mounting instruction for rigid jacket Center each jacket segment on one of the feet 4 Mounting of the flexible 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 might be neccessary to go through one heatng cycle A warmed up jacket is easier to close Nota Jackets and kits are supplied is separate colli 0307593R0 12
8. steel For protection against corrosion the inside of the tank is glass lined The tank is also fitted with magnesium anodes for extra protection against corrosion A thick replaceable insulation jacket minimizes heat loss 1 2 Controls ST models are supplied without controls 1 3 Dimensions ST1500 2000 ST 2500 3000 2 Hot water outlet 2 Connection sizes O O OOOO O 1 inlet 2 Outlet Ta y ee ee 4 JI ej Recirculation 3 Andi EI 17 z saa a A 1100 1400 S SE nN a Da diameter r er 1500 e jean eons 19902118 1990 2118 6 Recirculation 114 ecircilanon D Height alt inlet between 2 k connections ee 500 565 n e a f HE circulation conn NS LLH opening cm Height inlet Clean out diameter t t 1 Cold water inlet drain 2 1 4 Technical specifications ___81500 2000 ST 2500 3000 4 Storage capacity mr 1500 2000 2500 3000 Tank heat loss kWh 24h 3 Maximum working pressure ban Test pressure tank 374 1506 637 739 bar 5 Maximum allowed tank temperature C Weightempty g Weight empty 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 th
9. ter tap 2 If there is any risk of frost damage drain the tank completely 3 4 Maintenance The pressure relieve valve must be tested regularly by opening test lever for some seconds The water must run out in a full jet Close lever again making sure it sets properly and the valve is not leaking Check if the drainpipe is open It is recommended to arrange for a maintenance contract with the installer 4 WARRANTY 4 1 Warranty in general If within one year of the original installation date of the tank supplied by A O Smith any part or component other than the tank shall prove upon examination by A O Smith and in the exclusive opinion of the latter to be defective in material and or workmanship A O Smith will exchange or repair such part or component 4 2 Warranty of the tank If within 5 years of the original installation date of the tank supplied by A O Smith the tank shall prove upon examination by A O Smith and in the exclusive opinion of the latter to be leaking due to rust or corrosion from the waterside A O Smith will supply a complete new tank of equivalent size and quality on ex factory basis On the replacement tank a warranty will be granted sufficient to cover the not expired portion of the original 5 year warranty of the originally installed water heater WARNING the warranty period will be reduced to year from the original installation date if unfiltered or water softened to less than 70 ppm flows through or r
10. y risk of frost damage drain the tank completely 2 5 Maintenance The heater must be checked and cleaned regularly at least once a year by an accredited installer so that correct operation is guaranteed 2 5 1 Anodes The life of the anode is determined 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 lined tank In order to determine the frequency of replacement of the anode the waterside of the boiler must be checked three months after installation The anodes must be replaced if more than 60 has dissolved at any point on their length Procedure 1 Close the cold water inlet tap Relieve pressure from the heater completely by opening a hot water tap Remove the insulation package Unscrew and inspect the anode Replace when used for more than 60 Replace the anode Attention the anode must be in contact with the metal tank If the tank and the anode are electrically isolated the anode cannot function This could have a negative effect on the life of the tank Assemble everything in reverse order 7 Fill the heater as described in par 2 2 1 B amp B WwW NN ON 2 5 2 Descaling Calcium precipitation depends on the water properties and the hot water demand In addition calcium precipitation in the tanks increases at high water temperatures A clean out openin
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