Drazice OKC 300 NTRR/1MPa Petunjuk Pengoperasian dan Pemasangan - Halaman 5
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8. SPARE PARTS
- Magnesium anode
- contact thermometer
When ordering spare parts, give part name, type, and type number from the heater label.
9. HEATER CLEANING AND ANODE ROD EXCHANGE
Repetitive water heating causes limestone sediment on both the enamelled tank walls and chiefly the flange lid.
The sedimentation depends on the hardness of water heated, its temperature, and amount of hot water consumed.
We recommend checking and cleaning the vessel from scale and eventual replacement anode rod after
two years of operation. Anode life is theoretically calculated for two years of operation; however, it changes with
water hardness and chemical composition in the place of use. Based on such an inspection, the next term of anode
rod exchange may be determined. Have the company in charge of service affairs clean and exchange the anode.
When draining water from the heater, the mixing battery valve for hot water must be open, preventing occurrence of
under-pressure in the heater tank, which would stop the water from draining.
10. INSTALLATION REGULATIONS
Regulations and instructions that must be obeyed connect the heater
For the heating system
ČSN 06 0310 – Thermal systems in buildings – Designing and Installation
ČSN 06 0830 – Thermal systems in buildings – Protecting devices
to the electrical network
ČSN 33 2180 - Connecting of electric devices and appliances
ČSN 33 2000-4-41 - Low voltage electric installations Protective measure to ensure safety
- Protection from injury caused by electricity
ČSN 33 2000-7-701 - Low voltage electric installations: Single-purpose devices and devices in special premises -
Premises with tub or shower
to the hot water heating system
ČSN 06 0320 - Thermal systems in buildings - Hot water preparation – Design and Project Engineering
ČSN 06 0830 – Thermal systems in buildings – Protecting devices
ČSN 73 6660 – Internal water conduits
ČSN 07 7401 - Water and steam for thermal energy equipments with working steam pressure up to 8 MPa
ČSN 06 1010 - Tank water heaters with water and steam heating; and combined with electric heating.
Technical requirements. Testing.
ČSN 75 5455 – Calculation of water installations inside buildings
ČSN EN 12897 – Water supply – Indirectly heated closed tank-type water heaters
Both electric and water installation must follow and meet requirements and regulations relevant in the
country of use.
NOTICE
To prevent the occurrence of bacteria (e.g. Legionella pneumophila) within stack heating it is recommended, if
absolutely necessary, to increase the temperature of hot service water periodically for a transitional period of time to
at least 74 °C. It is also possible to make use of another way of disinfecting the hot water system.
11. CONNECTING A HEATER TO A HEATING SYSTEM
The heater is placed on the ground, next to the heating source, or in its vicinity. The heating circuit is connected to
marked inputs and outputs of the heater exchanger; deaerating valve is mounted in the highest place. It is necessary
to install a filter into the circuit in order to protect the pumps, the three-way valve, and backflow flaps, and the
exchanger from sedimentation. It is recommended to flush the heating circuit before the assembly. All wiring
connections must be properly insulated from heat. Should the system work with priority heating of hot service water
using a three-way valve, always follow the installation instructions of the three-way valve's manufacturer.
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