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OPERATING AND INSTALLATION MANUAL

INDIRECT WATER HEATER

OKC 300 NTR/HP
OKC 400 NTR/HP
OKC 500 NTR/HP

Družstevní závody Dražice-strojírna s.r.o. (

Works Cooperative - Dražice – Machine Plant, Ltd.)

Dražice 69

294 71 Benátky nad Jizerou

Tel.: 326 370 911, fax: 326 370 980

www.dzd.cz

dzd@dzd.cz

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Summary of Contents for OKC 300 NTR/HP

Page 1: ...RECT WATER HEATER OKC 300 NTR HP OKC 400 NTR HP OKC 500 NTR HP Družstevní závody Dražice strojírna s r o Works Cooperative Dražice Machine Plant Ltd Dražice 69 294 71 Benátky nad Jizerou Tel 326 370 911 fax 326 370 980 www dzd cz dzd dzd cz ...

Page 2: ...ating in conjunction with a heat pump Reheat can be carried out by the electric heater TJ 6 4 2 PRODUCT DESCRIPTION The heater vessel is welded from a steel plate and as a whole is protected by enamel resistant to hot water Magnesium anode is added in the vessel as an additional protection against corrosion which regulates the electric potential of the inside of the vessel and thus reduces the eff...

Page 3: ...and then the safety thermostat b Open the hot water valve on the combination faucet c Open the cold water inlet valve to the heater d When the water starts to flow through the hot water valve the filling of the heater is finished and the valve needs to be closed e Should a leak of the flange lid occur we recommend tightening the screws of the flange lid f When heating the water with thermal energy...

Page 4: ...4 Fig 1 OKC 300 NTR HP ...

Page 5: ...5 Fig 2 OKC 400 500 NTR HP Chart 2 All dimensions 5 mm ...

Page 6: ...6 ...

Page 7: ...turer are used for the assembly Starting pressure of a safety valve must be identical to the maximum allowed heater pressure and at least 20 higher than the maximum pressure in the water main If the water main pressure exceeds such value a reduction valve must be added to the system No stop valves can be put between the heater and the safety valve During the assembly follow the guide provided by t...

Page 8: ...n and exchange the anode When discharging water from the heater the combination faucet hot water valve must be open in order to avoid creating underpressure that would prevent water discharge 10 INSTALLATION REGULATIONS Regulations and instructions that must be obeyed during heater assembly a to the heating system ČSN 06 0310 Thermal systems in buildings Designing and Installation ČSN 06 0830 Ther...

Page 9: ...All wiring connections must be properly insulated from heat If the system works with priority heating of HSW using a three way valve always follow the installation instructions of the three way valve s manufacturer An example of a group heater connection for steady hot water consumption from all tanks using Tichelmann s method Fig 3 OV Heating water TUV Hot service water SV Cold water 1 back press...

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