- DL manuals
- A.O. Smith
- Water Heater
- dre-120
- Installation And User Instructions Manual
A.O. Smith dre-120 Installation And User Instructions Manual
Summary of dre-120
Page 1
Hot water storage devices united kingdom / ireland models dre 52 dre 80 dre 120 installation and user instructions.
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2 read this manual carefully warning read this manual carefully before using the device. Not reading this manual and not following the instructions in this manual may lead to personal injuries and damage to the device. Copyright © 2009 a.O. Smith water products company all rights reserved. Nothing f...
Page 3: Table of Contents
3 table of contents 1. General ...........................................................................................4 1.1 device description ............................................................................................ 4 1.2 regulation and safety ...................................
Page 4: 1. General
4 1. General 1.1 device description the structure and equipment for this electrical heating device are in accordance with the european standard for electrical household devices (en 60335-1:2002 + a11:2004 + a1:2004 + a12:2006 + a2:2006 en en 60335-2-21:2003 + a1:2005) the device thus meets the europ...
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5 fig. 1 - regulation and safety 1.2 regulation and safety for clarification see the diagram below: (the image is an extract from the electrical diagram further on).
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6 3 relays (3) and a control current transformer (5) are fed from the main connection block (1). The main circuit is protected by 30 amp t fuses. The transformer (400v to 24v) is primarily secured with t0,2 a (4). A boil dry protection mechanism (in the form of a float switch) (7) is included in the...
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7 1.2.1 boil dry protection fig. 2 - float switch the boil dry protection mechanism consists of a float switch which monitors the water level approximately halfway up the tank above the elements. If there is insufficient water present in the tank, then the float (1) hangs down. If the tank is filled...
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8 1.2.2 checking the float switch switch off the feed voltage and remove the fuses from the elements. In this way the control circuit can be tested without the elements being put into operation. Drain the device until the water is definitely below the float switch. If desired the float switch can no...
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9 1.3 technical description fig. 3 - measurements measurement description 52 80 120 a height hot water connection 1460 1580 1600 b height of upper side of device 1420 1540 1570 d diameter of boiler 560 640 750 e depth 690 790 910 m height of drain valve 125 125 125 r height cold water supply 125 125...
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10 1.4 technical data type dre 52-9 dre 52-18 dre 52-36 tank capacity litres 200 200 200 number of elements - 3 3 6 power 380v-3f kw 7.6 15.2 30.3 power 400v-3f kw 8.4 16.8 33.6 power 414v-3f kw 9.0 18.0 36.0 heating time up to 60c* (400/414v) min 83/78 42/39 21/19 heating time up to 40c* (400/414v)...
Page 11
11 type dre 120-9 dre 120-18 dre 120-36 dre 120-54 tank capacity litres 450 450 450 450 number of elements - 3 3 6 9 power 380v-3f kw 7.6 15.2 30.3 45.5 power 400v-3f kw 8.4 16.8 33.6 50.4 power 414v-3f kw 9.0 18.0 36.0 54.0 heating time up to 60c* (400/414v) min 187/174 93/87 47/44 31/29 heating ti...
Page 12: 2. For The Installer
12 2. For the installer 2.1 installation procedures the device may only be placed in a space if this meets the valid national and local regulations. This space must be frost free or protected against frost. The device may not be installed in damp or wet areas. The insulation classification of the de...
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13 2.1.4 electrical diagrams the electrical circuit diagrams of the various versions are given on the next pages. The regulating and safety sections are the same for all versions. In principle the only difference is the number of elements. An overview is given in the table below. Diagram a diagram b...
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14 diagram a: electrical diagram – 3 elements electrical diagram – 3 phases – 3 elements a = network connection b = fuses c = relay d = fuse e = transformer f = safety relay g = float switch h = maximum thermostat k = regulation thermostat l = electrical heating element x1 = terminal block 1 = black...
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15 electrical diagram – 3 phases – 6 elements a = network connection b = fuses c = relay d = fuse e = transformer f = safety relay g = float switch h = maximum thermostat k = regulation thermostat l = electrical heating element x1 = terminal block 1 = black / zwart / schartz / noir 2 = red / rood / ...
Page 16
16 diagram c: electrical diagram – 9 elements electrical diagram – 3 phases – 9 elements a = network connection b = fuses c = relay d = fuse e = transformer f = safety relay g = float switch h = maximum thermostat k = regulation thermostat l = electrical heating element x1 = terminal block 1 = black...
Page 17
17 2.2 putting into operation 2.2.1 filling the device 1. Fit the drain valve and check whether it is closed. 2. Open cold water valve to the boiler and open all valves at hot water drainage points for bleeding. The device is filled as soon as cold water flows at all drainage points. 3. Reclose all ...
Page 18
18 2.2.4 temperature regulation the device is continuously under water pipe pressure (maximum 8 bar (=800 kpa)). Cold water may be fed if hot water is being consumed. The regulating thermostat switches the feed automatically. That means that if the thermostat measures a temperature lower than the se...
Page 19
19 in normal operation the safety relays are in a taut condition. When the feed voltage is switched off these drop. This is clearly audible. If the switching on and off of the relay is not audible, then check whether feed voltage is present and the fuses of the feed are in order. If this is in order...
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20 2.5 spare parts prior to ordering spare parts it is important to note the device type and the full serial number of the device. This information is given on the plate which is affixed to the outside of the door. Data for spare parts can be established by using this information. 2.4.3 fault table ...
Page 21: 3. For The User
21 3. For the user 3.1 instructions for use warnings the installation and commissioning shall be done by a recognised installer. Always make the device free of voltage before opening the door. Have maintenance and fault rectification carried out by authorised personnel. Never work on the device whil...
Page 22
22 3.1.4 putting out of operation method of working: 1. For short periods: take the connector out of the stop contact or where there is a fixed connection switch off the mains switch. 2. In addition to the operations in point 1, for longer periods it is recommended to shut off the water feed pipe in...
Page 23: 4. Warranty
23 4. Warranty 4.1 general warranty if, within one year from the original installation date, after investigation and exclusive evaluation by a.O. Smith, a boiler delivered by a.O. Smith turns out to have a part, with the exception of the tank, that is not properly functioning as a result of manufact...
Page 24
24 4.4 exclusions the warranty referred to in articles 1 and 2 does not apply: a) if the boiler has been damaged by an external cause; b) in case of abuse, neglect (including freezing), modification, incorrect and/ or deviating use of the boiler and if attempts have been made to repair leaks; c) if ...
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0310 145_r2.