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13 

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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.

 

Based on such an inspection, the next term of anode rod exchange may be 

determined. If the anode is only blocked with sediments clean its surface and, if used up, mount 
a new one. Have a company in charge of service affairs deal with the cleaning and exchanging 
of the anode. 

 

 

2.9

 

MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES 

FAILURE SYMPTOM

 

INDICATOR

 

SOLUTION

 

Water is cold

 

 

Light on

 

 

The temperature set on the thermostat

 

is too low

 

 

H

eating element failure

 

Water is cold

 

 

Light off

 

 

No supply voltage!

 

 

Thermostat failure

 

 

Safety thermostat shut off probably due

 

to failed operation thermostat

 

Water is not warm enough

 

 

Light on

 

 

heating element failure

 

Temperature of water is not 

corresponding with the 

temperature set on the 

control

 

 

 

Defective thermostat

 

Water is constantly dripping 

off the safety valve

 

 

Light off

 

 

high input pressure

 

 

defective safety valve

 

 

Table 4 

 

Do not attempt 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.

 

 

 

 

Содержание OKHE ONE20

Страница 1: ...WATER HEATER FOR VERTICAL MOUNTING Electric water heaters OKHE ONE20 Dru stevn z vody Dra ice stroj rna s r o Works Cooperative Dra ice Machine Plant Ltd Dra ice 69 294 71 Ben tky nad Jizerou tel 420...

Страница 2: ...FIXTURES 8 2 4 ELECTRICAL INSTALLATION 10 2 4 1 GENERAL INFORMATION FOR ELECTRICAL INSTALLATION 10 2 5 OPERATION 10 2 6 FIRST COMMISSIONING 11 2 7 PUTTING OUT OF SERVICE EMPTYING 11 2 8 INSPECTION MAI...

Страница 3: ...onsible person or unless properly instructed by such responsible person The manufacturer reserves the right for engineering modification of the product The product is designed for permanent contact wi...

Страница 4: ...umption of hot water in households depends on the number of people amount of sanitary equipment length diameter and insulation of piping in the flat or on individual habits of users The cheapest optio...

Страница 5: ...44 MAX OPERATING TEMPERATURE OF HOT WATER HW C 80 RECOMMENDED HOT WATER HW TEMPERATURE C 60 HEIGHT OF THE HEATER mm 591 SIZE OF THE HEATER width x depth mm 523x301 MAX WEIGHT OF THE HEATER WITHOUT WA...

Страница 6: ...with a quality polyurethane insulation that ensures minimum heat losses Wiring is installed in the bottom part of the heater Water temperature may be set by a thermostat in the range from 5 C to 74 C...

Страница 7: ...k the bearing capacity of the wall and the material it is made of considering the weight of the heater filled with water Depending on the wall material choose adequate fixtures Should you have any dou...

Страница 8: ...h a check valve is supplied with the heater It is necessary to check the safety valve each time before putting it into operation It is checked by manual moving of the membrane from the seat turning th...

Страница 9: ...ble 3 Figure 3 Figure 4 SAFETY VALVE START UP PRESSURE MPa ALLOWABLE OPERATING OVERPRESSURE OF WATER HEATER MPa MAXIMUM PRESSURE IN COLD WATER PIPES MPa 0 6 0 6 up to 0 48 0 7 0 7 up to 0 56 1 1 up to...

Страница 10: ...en colour of minimum cross section of 4 mm2 Access to the power section of the heater is only possible once the heater is disconnected from the power supply and the cover of the heater unscrewed Adher...

Страница 11: ...eck the water main and wiring Check proper placement of the operating and safety thermostat thermal fuse sensors The sensors must be inserted all the way in first the operating and then the safety the...

Страница 12: ...d after each heater shutdown for more than 5 days Attention The inlet cold water pipe and the connection fitting of the heater may heat up If the hot water heater does not work or if hot water is not...

Страница 13: ...CAUSES FAILURE SYMPTOM INDICATOR SOLUTION Water is cold Light on The temperature set on the thermostat is too low Heating element failure Water is cold Light off No supply voltage Thermostat failure...

Страница 14: ...ll hot water outputs must have a combination faucet Before filling the heater with water for the first time it is recommended to fasten the flange connection nuts of the tank It is not allowed to hand...

Страница 15: ...4 3 DISPOSAL OF PACKAGING MATERIAL AND NON FUNCTIONING PRODUCT The packaging that the product was delivered in has been paid for in form of a service fee for the provision of the return and recovery...

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