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OPERATING AND
INSTALLATION MANUAL
FLAT WATER TANK-TYPE WATER HEATER FOR
VERTICAL MOUNTING
Electric water heaters
OKHE ONE20
Družstevní závody Dražice-strojírna s.r.o.
(Works Cooperative - Dražice - Machine Plant, Ltd.)
Dražice 69, 294 71 Benátky nad Jizerou
tel.: +420 / 326 370 911
fax: +420 / 326 370 980
e-mail:
export@dzd.cz
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Summary of Contents for Drazice OKHE ONE20
- Page 1 INSTALLATION MANUAL FLAT WATER TANK-TYPE WATER HEATER FOR VERTICAL MOUNTING Electric water heaters OKHE ONE20 Družstevní závody Dražice-strojírna s.r.o. (Works Cooperative - Dražice - Machine Plant, Ltd.) Dražice 69, 294 71 Benátky nad Jizerou tel.: +420 / 326 370 911...
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Page 2: Table Of Contents
CONTENTS PRODUCT TECHNICAL SPECIFICATION ....................... 4 FUNCTION DESCRIPTION ........................4 ADVICE FOR CUSTOMERS ........................4 1.2.1 HOT WATER CONSUMPTION ..................... 4 1.2.2 ENERGY SAVING ......................... 4 1.2.3 EMERGENCY POWER CONSUMPTION ..................4 DESIGN AND GENERAL HEATER DIMENSIONS ................... 6 PERATION AND FITTING INSTRUCTIONS ....................7 OPERATING CONDITIONS ........................ - Page 3 CAREFULLY READ THIS MANUAL BEFORE INSTALLING THE WATER HEATER! Dear Customer, The Works Cooperative of Dražice - Machine Plant, Ltd., would like to thank you for your decision to use a product of our brand. With this guide, we will introduce you to the use, construction, maintenance and other information on electrical water heaters.
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Page 4: Product Technical Specification
1 PRODUCT TECHNICAL SPECIFICATION 1.1 FUNCTION DESCRIPTION Tank type water heater (the heater hereinafter) is designed for the accumulation heating of service water by electric energy. Water is heated by an electric element in an enamelled thermally insulated tank. The element is at the time of heating controlled by a thermostat the temperature of which can be adjusted continuously (within the range between 5°C and 74°C). - Page 5 TYPE OKHE ONE 20 VOLUME MAX OPERATING OVERPRESSURE IN THE TANK ELECTRICAL CONNECTION 1/N/PE ~ 230V/50Hz RECOMMENDED BREAKER 10 A INPUT 2200 EL. PROTECTION IP 44 MAX OPERATING TEMPERATURE OF HOT °C WATER (HW) RECOMMENDED HOT WATER (HW) °C TEMPERATURE HEIGHT OF THE HEATER SIZE OF THE HEATER 523x301...
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Page 6: Design And General Heater Dimensions
1.3 DESIGN AND GENERAL HEATER DIMENSIONS The receptacles of the heater tank are made of steel plate and tested by 1.5 MPa multiple of operation pressure value. The inside of the receptacle is enamelled. In the bottom part of the tank there are wells for placing the heating, regulation and safety element of the water heater (heating element with right thread G 5/4“, thermostat sensor and thermal fuses). -
Page 7: Peration And Fitting Instructions
¨ 2 PERATION AND FITTING INSTRUCTIONS 2.1 OPERATING CONDITIONS The heater may only be used in accordance with the conditions specified on the nameplate and the instructions contained in this manual. Besides the legally acknowledged national regulations and standards, also conditions for the connection defined in local electric and water works have to be adhered to, as well as the installation and operation manual. -
Page 8: Plumbing Fixtures
180mm Figure 2 2.3 PLUMBING FIXTURES The heater connects to water distribution tubes with G1/2“ thread in the bottom part of the heater. Blue - cold water supply, red - hot water outlet. For potential disconnection of the heater, the service water inlets and outlets must be provided with screw coupling Js 1/2“. The safety valve is mounted on the cold water inlet identified with a blue ring. - Page 9 ALLOWABLE MAXIMUM SAFETY VALVE OPERATING PRESSURE IN COLD START-UP OVERPRESSURE WATER PIPES PRESSURE [MPa] OF WATER HEATER [MPa] [MPa] up to 0.48 up to 0.56 up to 0.8 Table 3 Figure 3 Figure 4 - 9 -...
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Page 10: Electrical Installation
2.4 ELECTRICAL INSTALLATION 2.4.1 GENERAL INFORMATION FOR ELECTRICAL INSTALLATION Execute the connection as indicated in the wiring diagram. Factory connection must not be changed! The degree of protection of electric parts of the heater is IP 44. Power input of electric element is 2200 W. Figure 5 It is necessary to observe the below requirements during the electric wiring. -
Page 11: First Commissioning
2.6 FIRST COMMISSIONING Before connecting to the electricity, the heater must be filled with water. The process of first heating must be executed by licensed professional who has to check it. Both the hot water outlet pipe and safety armature parts may be hot. During the heating up process the water that increases its volume during the heating must visibly drip off the safety valve. -
Page 12: Inspection, Maintenance & Care For The Appliance
Drainage of service water shall be performed after closing the shut-off valve in the cold water supply piping (through the discharge valve for a combination of safety valves) and with simultaneous opening of all hot water valves of connected fittings (water can be also drained through the safety valve. -
Page 13: Most Frequent Function Failures And Their Causes
We recommend checking and cleaning the tank from lime scale and eventual replacement of the anode rod after two years of operation. The anode life is theoretically calculated for two years of operation; however, it changes with water hardness and chemical composition in the place of use. -
Page 14: Operation Of Thermostat
3 OPERATION OF THERMOSTAT 3.1 TEMPERATURE SETTING Water temperature can be set by turning the knob of the thermostat between 0 °C to 74 °C by the symbol of the thermostat knob. Figure 6 4 IMPORTANT NOTICES 4.1 INSTALLATION REGULATIONS Without a confirmation of performed electrical installation issued by an authorised company, the warranty certificate shall be void. -
Page 15: Transport & Storage Instructions
The recommended operating pressure in the hot water circuit is 0.48 MPa. At the hot water discharge we recommend that a reverse flap and an expansion tank are installed (at least 4% of hot water volume in the manifold) to eliminate reverse pressure shocks. Both the electric and water installation must follow and meet the requirements and regulations relevant in the country of use! 4.2 TRANSPORT &...
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