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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.
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CONTENTS 1. GENERAL 1.1 Description of the heater 3 1.2 Controls 3 1.3 Dimensions 3 1.4 Technical data 5 2. FOR THE INSTALLER 2.1 Installation 5 2.2 Water connections 6 2.3 Commissioning 7 2.3.1 Filling the heater 7 2.3.2 Heater start-up 7 2.4 Shutting 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
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1. GENERAL 1.1 Description of the heater Construction of the heater is 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 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.
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1.4 Technical specifications ST 1500/2000 ST 2500/3000 1 Storage capacity ltr 1500/2000 2500/3000 2 Tank heat loss kWh/24h 8.5 10.1 3 Maximum working pressure bar 7 7 4 Test pressure tank bar 12 12 5 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 b
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6 Back-up element 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. 5
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2.3 Commissioning 2.3.1 Filling the tank 1. Check if any installed drain valve is closed. 2. 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 is filled when cold water runs out of all outlets. 4. Close all hot water taps 2.3.2 Start up Check if 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. C
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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 opening 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 for
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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
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4.4 Exclusions The warranty ensuing from sections 4.1 and 4.2 will be null and void: a. If the 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. If the water conductivity is less than 150 µS/cm and/or the degree of water hardness is less than 6 °DH/75 ppm. e. If unfiltered,
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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
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2 – Mounting instructions for flange covers, anodes, T&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&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 i
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3 – Mounting instruction for rigid jacket Nota: top panels, once placed, fixate the 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 throug
