OKHE SMART

OKHE SMARTSmart water heater with electronic thermostat and the option of connection to HDO. It includes autodidactic algorithm and heats water if required. It is possible to switch to several modes (MANUAL, MANUAL HDO, OPTIMUM, PROG, SMART, ANTI FREEZE). The heater is controlled by means of the operating system Android/iOS.

More

Stationary 1 MPa

Character

Design

  • Indirect water heaters with enamelled vessel with the maximum operating pressure of 1 MPa and volumes from 300 up to 1000 litres. The water heaters are equipped with one (NTR) or two (NTRR) high performance spiral heat exchangers, receivers for regulating sensors and a flanged manhole. Hot utility water may be heated using heating water with the temperature of max. 110 °C and pressure of 1 MPa. Auxilliary electric heating from the accessories section of the R or SE series may be fitted into the manhole. The 6/4" neck above the lower heat exchanger is designed for additional electric heating of hot utility water using the heating unit of the TJ series from the accessories section. This additional heating is used mainly in case of connection of the water heater to the solar system. Water heaters with the volume below 500 litres are insulated by 50 mm of hard polyurethane foam. Water heaters with volumes of 750 l, 1000 l are insulated by 100 mm of soft polyurethane foam supplied separately with the vessel.

Most common use

  • Heating of hot utility water using heating water or in combination with electric heating for medium and large premisses, emergency water supply for heat exchange stations, bigger alternative power sources, etc.

Cut of NTR

Cut of OKC NTR

Cut of NTRR

Cut of OKC NTRR


Summary

Stationary 1 MPa – one exchangerStationary 1 MPa – two exchangers
OKC 300 NTR/BP, OKC 400 NTR/BP, OKC 500 NTR/BP, OKC 750 NTR/BP, OKC 1000 NTR/BP
OKC 300 NTRR/BP, OKC 400 NTRR/BP, OKC 500 NTRR/BP, OKC 750 NTR/BP, OKC 1000 NTRR/BP

Technical data of NTR

TypeOKC 300  NTR/BPOKC 400  NTR/BPOKC 500  NTR/BPOKC  750 NTR/BPOKC 1000  NTR/BP
Volume [l] 296 373 447 725 945
Max. weight of the heater without water [kg] 108 130 137 216 284
Max. operating overpressure in the tank [MPa] 1    
Max. operating overpressure in the exchanger [MPa] 1    
Max. temperature of HSW [°C]  90     90 90 95 95
Max. operating temperature in the exchanger [°C] 110    
Heater height [mm] 1 595 1 919 1 892 1 998 2 025
Heater diameter [mm] 670 650 700 910 1 010
Exchanger heat transfer surface [m2] 1,5 2 2 3,7 4,5
Output of exchanger at heating water temperature of 80 °C and flow 720 l/h [kW] 35 58 59 99 110
Time of heating by exchanger from 10 °C to 60 °C [min] 30 22 26 24 26
Static loss [W] 83 109 121 143 170

HSW – heat service water.

 

Technical data of NTRR

TypeOKC 300  NTRR/BPOKC 400  NTRR/BPOKC 500  NTRR/BPOKC 750  NTRR/BPOKC 1000  NTRR/BP
Volume [l] 285 363 433 710 930
Max. weight of the heater without water [kg] 126 145 158 213 271
Max. operating overpressure in the tank [MPa] 1
Max. operating overpressure in the exchanger [MPa] 1
Max. temperature of HSW [°C] 90 90 90 95 95
Max. operating temperature in the exchanger [°C] 110
Heater height [mm] 1 595 1 919 1 892 1 998 2 025
Heater diameter [mm] 670 650 700 910 1 010
Exchanger heat transfer surface (upper/lower) [m2] 1/1.5 1/2 1.4/2 1.17/1.93 1.12/2.45
Output of upper/lower exchanger at heating water temperature of 80 °C and flow 720 l/h [kW] 24/35 26/58 37/59 33/60 32/76
Time of heating by exchanger from 10 °C to 60 °C (upper/lower) [min] 16/24 22/23 26/27 28/37 37/43
Static loss [W] 83 114 121 140 167

HSW – heat service water

Photogallery

OKC 250 NTR/HP
OKC300NTR-HP