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Electronic temperature regulator for three-phase electrical water
heaters, combined with two heat exchangers
NHC-H41 is a temperature regulator with a modern and effective look, designed to control an
electrical water heater, combined with a hot water installation with a solar collector and a boiler, a
fireplace or any other similar installation. It has a graphic LCD display with the ability to show
different types of information, which allows adding many new and useful options. Due to the two
built-in differential temperature regulators in a joint controller, the advantages of the different heat
sources are appropriately combined. For example, if the sun wasn't strong enough during the day,
you can always set up the controller to turn the electrical heater on, so the water heater will be ready
for you with enough hot water. If you have an installation with a fireplace or a boiler, the water
heater can constantly monitors their temperature and use their heat to warm up the water, if
possible.
Specific advantages of the temperature regulator NHC-H41:
Uses energy from the electrical heater, if the water is not heated up enough by the solar
•
collector
Automatically uses energy from a boiler or a fireplace installation, if high enough
•
NHC-H41-2 Reference Manual ver 2.2
NHC-H41
software version 2.1
User manual
page 1 / 15
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Summary of Contents for Naturela NHC-H41
- Page 1 2.1 User manual NHC-H41 is a temperature regulator with a modern and effective look, designed to control an electrical water heater, combined with a hot water installation with a solar collector and a boiler, a fireplace or any other similar installation. It has a graphic LCD display with the ability to show different types of information, which allows adding many new and useful options.
- Page 2 Monitors the condition of the heater and shows a message if the water is not heated up for • the presumed time. Connection scheme of NHC-H41-2 with a water heater NHC-H41-2 Reference Manual ver 2.2 page 2 / 15...
- Page 3 This mode is appropriate when the water heater is intensively used, when hot water is constantly necessary, when fast heating up the water is required or there is not enough solar energy. NHC-H41-2 Reference Manual ver 2.2 page 3 / 15...
- Page 4 The combined mode allows full use of the solar energy for heating up the water during the day and use of the electrical heater for keeping the temperature during the night or for additional heating up the water when the solar energy is not enough. NHC-H41-2 Reference Manual ver 2.2 page 4 / 15...
- Page 5 This is a very useful mode, because the controller automatically finds the heat presence and uses it while possible. NHC-H41-2 Reference Manual ver 2.2 page 5 / 15...
- Page 6 35 degrees and the temperature of the collector is at least 10 degrees lower, the circulation pump turns on and the heat, accumulated in the water heater, goes to the solar collector. When the sun NHC-H41-2 Reference Manual ver 2.2 page 6 / 15...
- Page 7 Temperature difference (t3-t1) for turning off the pump Minimum temperature difference between the boiler and the upper section of the water heater (t4-t2) for turning on the pump Temperature difference (t4-t2) for turning off the pump NHC-H41-2 Reference Manual ver 2.2 page 7 / 15...
- Page 8 S3 E2 – A breakdown in the temperature sensor of the collector. It is on short circuit. ■ Only modes with electrical heating and boiler heating will work. S3 Frost – The temperature sensor of the collector has registered temperature lower ■ NHC-H41-2 Reference Manual ver 2.2 page 8 / 15...
- Page 9 This is a restriction of the temperature measuring method and it is necessary to pay attention when using only not cooled hot water. NHC-H41-2 Reference Manual ver 2.2 page 9 / 15...
- Page 10 This forwards to the next setting, if any, or gets back to the main screen. If no action has been taken for a certain time, also appears the main screen, but the changes won't be saved. NHC-H41-2 Reference Manual ver 2.2 page 10 / 15...
- Page 11 Design I, and the heater and the pump turn off, if they were on. On this mode the indication of the anode protection, the clock and the indication of the water temperature remain. NHC-H41-2 Reference Manual ver 2.2 page 11 / 15...
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Page 12: Setting The Temperature
By entering the Setting mode, the screen goes to Design III. Pressing Mode/Set button forwards to the next setting screen. The order of the settings is the following: Setting time NHC-H41-2 Reference Manual ver 2.2 page 12 / 15... - Page 13 Setting temperature for protecting the collector from freezing and a critical minimum temperature. If the collector's temperature is the same as in Pump On, the pump turns on to take heat from the water heater to the collector. NHC-H41-2 Reference Manual ver 2.2 page 13 / 15...
- Page 14 This case is indicated by blinking time and date. A new time setting is required! Water heater initial settings The temperature regulators NHC-H41 are designed for different types of boilers. The necessary personalization is not made in the factory and after you instal your water heater it is required to enter some information about the heater's power and presence of an anode protection (if the water heater is made of stainless steal it has no anode protection).
- Page 15 ▼ pressing “ ” button. Pressing the “F” button saves the changes, which have been made and forwards to • the next parameter, if any, or to “Water heater Off” mode. NHC-H41-2 Reference Manual ver 2.2 page 15 / 15...
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