Dražice OKC 100 NTR Operation And Installation Manual - Page 8

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Dražice OKC 100 NTR Operation And Installation Manual
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.
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.
15.

MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES

Water is cold
Water is not warm enough
Temperature of water is not
corresponding
Water is constantly dripping of
the safety valve
Do not try to repair the failure yourselves. Seek either expert or service help. It does not take much for an expert to
remove the defect. When making a repair appointment, report the type and serial number you find on the
performance plate of your water heater.
16.

PRODUCT ACCESSORIES

The product is supplied with a safety valve, 2 – 4 fastening screws M 12x30, 2-4 washers  13
(OKCE version has them mounted in the hinges on the heater) and a thermometer. The above parts are
packed and placed in the packaging in the top part of the heater.
It is in your own interest to check the completeness of the accessories.
Technical requirements. Testing.
LED is on
LED is not on
LED is on
LED is not on
The temperature set on the thermostat is too low
Heating element failure
No supply voltage; thermostat failure;
Safety thermostat shut off probably due to failed
operation thermostat
failure of one of the coils in the element
(contains 2)
Defective thermostat
Input pressure too high; faulty safety valve
8