background image

solar installation's circulation pump works constantly to avoid overheating of the  
solar collector!!!

S3 Frost

 – The collector's temperature sensor has registered temperature lower than 

the set critical minimum temperature and it is possible the fluid to be frozen. Only 
modes with electrical heating and boiler heating will work. Must check the system 
wholeness, before turning it on again. 

S4 E1

 – A breakdown in the boiler's temperature sensor. It is broken or disconnected. 

Only modes with electrical heating and solar heating will work.

S4 E2

 – A breakdown in the boiler's temperature sensor. It is on short circuit. Only 

modes with electrical heating and solar heating will work.

S4 Frost

 – The boiler's temperature sensor has registered temperature lower than the 

set critical minimum temperature and it is possible the fluid to be frozen. Only modes 
with electrical heating and solar heating will work. Must check the system wholeness 
before turning it on again. 

S5 E1

 – A breakdown in the water heater's middle temperature sensor. It is broken or 

disconnected.

S5 E2

 – A breakdown in the water heater's middle temperature sensor. It is on short 

circuit. 

S5 Frost

 – On turning on the power supply the temperature of the water in the water 

heater is below zero and it is possible to be frozen. Must check the wholeness of the 
tank before turning the power supply on again.

** diagrams for the consumed electricity and pumps performance

A diagram for the consumed electricity, divided by hours for  the 
current day. 50% for one hour means that the electrical heater 
has been working on its full power for 30 minutes out of 60 
possible.

A diagram for the active hours of the solar collector's circulation 
pump, divided by hours for the current day. 50% for one hour 
means that the pump has been working for 30 minutes out of 60 
possible.

 

A diagram for the active hours of the boiler's circulation pump, 
divided by hours for the current day. 50% for one hour means 
that the pump has been working for 30 minutes  out of 60 
possible.

NHC-H42-2 Reference Manual ver 1.6

стр. 11 / 18

Содержание NHC-H42-2

Страница 1: ...ller has a contrast LCD display four control buttons and a LED indication for the electrical heater NHC H42 has a built in electronic temperature regulator to control a mono phase or three phase elect...

Страница 2: ...t day Prevents the freezing of the water heater or of the solar collector Information about the condition of the anode protector Information if higher than 30mA leakage from the electrical heater to t...

Страница 3: ...an electrical heater and two differential temperature regulators adapted for a solar collector installation and a heating installation with a boiler or a fireplace The difference in the differential t...

Страница 4: ...on the main screen The display has four main screen designs They show different screen view for the main work conditions of NHC H42 Water Heater Off Water Heater On Settings and Graphics 1 Design I Wa...

Страница 5: ...the temperature measured by the temperature sensor in the bottom section is displayed in this field Since the hot water goes up to the top section of the water heater and then to the pipes it is poss...

Страница 6: ...llation When the pumps are on and the differential temperatures t1 and t2 go below the limits set from the menu Dif Temp 1 2 line Pump Off the relevant circulation pump turns off To help the outer hea...

Страница 7: ...upper one appears on the display For the boiler s installation DHW priority mode boiler s circulation pump turns on if t2 or the temperature of the boiler t4 has to be higher than the temperature in t...

Страница 8: ...electrical heater is activated from the menu System Setting its turning on and off depends on the temperature in the bottom section of the water heater measured by Sensor 1 When changing the differen...

Страница 9: ...eater s control By pressing the View Enter button all the possible data appears successively in the following order Set temperature for heating with the electrical heater Temperature measured in the b...

Страница 10: ...heater It is broken or disconnected S1 E2 A breakdown in the temperature sensor in the bottom section of the water heater It is on short circuit S1 Frost On turning on the power the temperature of th...

Страница 11: ...oleness before turning it on again S5 E1 A breakdown in the water heater s middle temperature sensor It is broken or disconnected S5 E2 A breakdown in the water heater s middle temperature sensor It i...

Страница 12: ...r Changing the set temperature Further pressing any of the same buttons changes the set temperature in the relevant direction The View Enter button saves the new settings and the screen goes back to i...

Страница 13: ...the changes made on the current parameter Setting menus appear in the following order 1 Setting the temperature for turning on and off the electrical heater if it has been activated It turns on when t...

Страница 14: ...terval when the pump can turn on to transfer the heat energy to the solar collector on Holiday mode This interval must be during the night for this mode to make sense 9 Turns on off the anti frost saf...

Страница 15: ...stem Settings If you still have no boiler or solar installations you can deactivate them Moreover if you don t want the water heater to use electricity for the electrical heater you can disable it too...

Страница 16: ...reen view is in Design I press and hold for more than 2 seconds the F button to enter Settings mode menu Clear Errors By pressing the button select line Yes and press F again to save your choice and g...

Страница 17: ...ter heater s initial settings The temperature regulators NHC H42 are designed for different types of water heaters The necessary personalization is not made in the factory and after you instal your wa...

Страница 18: ...s to the next field of the same parameter by pressing button and it will start blinking increase the value of the blinking field by pressing the button and decrease it by pressing the button pressing...

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