Regulus ETT-P User manual

www.regulus.eu
ETT-P Heating Element
ETT-P Heating Element
EN
Installation and Operation Manual
Heating Element with Thermostatic Head,
three-phase, fixed wiring

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1 - General
1.1 - Application
This electric heating element is designed to heat either domestic hot water in a hot water storage tank
or heating water in a thermal store.
1.2 - Installation
Screw the heating element into the respective threaded sleeve (G 6/4” F) with the cable gland downwards. It is
recommended to use sealing cord, hemp, Teon tape or a semi-permanent thread sealant to avoid leaks.
1.3 - Maintenance
Clean the exterior of the heating element with a soft cloth and a suitable detergent. Never use abrasive clea-
ners or solvents.
If the element is used in extra hard water, it is recommended to remove sediments at least once a year.
Disconnect the element from the mains before cleaning. Then drain water from the tank and dismount the hea-
ting element. Scratch the hard deposits on the heating rod with a plastic or wooden spatula and ush with wa-
ter. Be careful not to damage the protective nickel layer on the heating rod. Then reinstall the body according
to this instruction manual, ll the tank with water, air-bleed and pressurize it. Check the threaded connection
for leaks. Finally, re-connect the heating element to the mains.
1.4 - Disposal
IMPORTANT INFORMATION ON PROPER DISPOSAL OF E-WASTE
AS REQUIRED BY THE EC DIRECTIVE 2002/96/EC (WEEE)
Do not dispose of this product as unsorted municipal
waste. Please dispose of this product by returning it to
the point of sale or to your local municipal collection
point for recycling.
Respecting these rules will help to preserve, protect
and improve the quality of the environment, protect
human health and utilize natural resources prudently and
rationally.
The crossed out wheeled bin with marking bar, printed
ether in the Manual or on the product itself, identies that
the product must be disposed of at a recycling collection
site. WEEE Registration Number: 02771/07-ECZ

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2 - Heating Element with Thermostatic Head,
three-phase, xed wiring
2.1 - Technical Description
The electric heating element consists of a nickel-plated heating rod with G 6/4“ outer thread, a capillary ther-
mostat adjustable between 0±5 °C and 90±3 °C (the lower limit is factory set to 15 °C as a frost protection and
the upper limit is set to 60 °C for use in hot water storage tanks) with 5±1,5 °C switching difference, a manual
reset safety capillary thermostat set to 99 °C and +0 °C, -6 °C tolerance, 7× 1.5 mm² power supply cable and
LEDs showing the state of the heating element. The power supply cable is 2 m long.
2.2 - Dimensions
type no. output [kW] el. wiring Nominal current LN-non-heating
end [mm]
L-heating rod
length [mm]
code
3×230 V
ETT-P-2.0 23/N/PE AC 230V 2.9 180 310 19041
ETT-P-3.0 33/N/PE AC 230V 4.3 180 370 19043
ETT-P-5.0 53/N/PE AC 230V 6.5 180 500 18915
ETT-P-6.0 63/N/PE AC 230V 8.7 180 555 18386
3×400 V
ETT-P-7.5 7,5 3/N/PE AC 400V 10.8 180 635 19045
ETT-P-8.2 8,2 3/N/PE AC 400V 11.9 180 700 19042
ETT-P-9.0 93/N/PE AC 400V 13.0 180 755 19044
2.3 - Connection to the Mains
The electric heating element shall be wired to a terminal box or electrical switchboard, 3/N/PE AC 400/230V,
xed wiring. The installation shall meet valid rules and standards and shall be done by an authorized person
only.
The wire marked N-HDO is intended to control the heating element by Ripple control. Should this connection
remained unused, both the centre blue wires (N and N-HDO) shall be joined together in the terminal box or
electrical switchboard.
The wire marked OVLÁDÁNÍ (L) is intended to control the heating element with a heating system controller.
This wire shall be joined with the controller-switched line. In such a case, the temperature set with the ther-
mostat knob shall be higher than that set by the controller. Should this connection remained unused, this wire
shall be joined together with the L1 line in the terminal box or electrical switchboard.

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2.4 - Wiring Diagram
2.4.1 - Wiring Diagram for the Heating Element
2.4.1.1 - Heating Elements 2 kW - 6 kW
2.4.1.2 - Heating Elements 7,5 kW - 9 kW
2.5 - Commissioning, Operation and Possible Faults
WARNING!
THE OUTGOING HOT WATER SHALL NOT BE LEAD THROUGH COMMON PLASTIC
PIPES. THE PIPING SHALL BE RESISTANT TO TEMPERATURE OF 100 °C MIN.
IF PLAIN COMMON PLASTIC PIPING IS USED, ITS SERVICE LIFE IS SIGNIFICANTLY
REDUCED UNDER TEMPERATURES OVER 60 °C. WHEN COMBINED WITH
IMPROPER PIPE FIXING THAT RESTRICTS DILATATION OR EVEN MAKES IT
IMPOSSIBLE, THE PIPE SERVICE LIFE MIGHT BE JUST SEVERAL HOURS!
Prior to commissioning, please make sure the water in direct contact with the heating element does not ex-
ceed the values given in the chart below. The manufacturer bears no responsibility for defects (e.g. limescale
deposits on the heating element) caused by adverse operating conditions.
Table of limit values for total dissolved solids in hot water
Description pH Total dissolved solids (TDS) Ca Chlorides Mg Na Fe
Max. value 6,5-9,5 600 mg/l 40 mg/l 100 mg/l 20 mg/l 200 mg/l 0,2 mg/l
red GREEN GREEN
CONTROL
Ripple control
white
red GREEN GREEN
CONTROL
Ripple control
white

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2.5.1 - DHW Heating in a Hot Water Storage Tank
In order to heat water in the hot water storage tank, open the cold water inlet, ll the tank with water and
airbleed it by opening the hot-water tap. Set the thermostat knob to the desired temperature. Both the green
LEDs will be lit on the heating element. As soon as the desired water temperature is reached, the green lamp
marked will go out. The lit green LEDs show that the heating element is energized and switched on. If the
green LED marked is out, the heating element is switched off by the adjustable thermostat.
It is recommended to set the thermostat knob to 60 °C. This temperature guarantees the best operation of the
heating element and at the same time, it offers:
- protection against Legionella
- cost reduction
- slower deposit formation
2.5.2 - Heating Water for Space Heating in a Thermal Store
Fill the heating system with heat transfer uid, air-bleed it and pressurize to the working pressure. Set the
thermostat knob to the desired temperature.
Should a temperature above 60 °C be set, the limiting spring under the knob shall be removed.
Steps:
- Pull the knob off the shaft,
- There are 2 limit springs inside the knob. Remove the upper one. It is tted in the groove 17 and limits
the adjustable temperature to 60 °C. (Just one spring will remain in the knob, tted in the groove 37. It limits
the min. adjustable temperature to 15 °C).
- Re-t the knob on the thermostat shaft.
This modication will increase the adjustment range to 15 - 90 °C.
Colour Marking Description
Green The heating element is OK, energized and ready for operation
Green The heating element is heating
Two green LEDs will be lit on the heating element. As soon as the desired water temperature is reached, the
green lamp marked will go out. The lit green LEDs show that the heating element is energized and
switched on.
If the green LED marked is out, the heating element is switched off by the adjustable thermostat.
2.5.3 - Heating Element State during Operation
Heating element state during operation is shown by the LEDs with the following meaning.

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3 - Wiring Examples for Heating Elements
When the safety temperature is reached, the safety thermostat will cut off the heating element from power
supply. In this state, no LED is lit. The safety thermostat requires manual reset. After the tank cools down, un-
screw the lid on the heating element housing and press the button beneath to reset the thermostat. The green
LED marked is lit and the heating element is ready for use again. Repeated occurrence of this condition
indicates a fault in the heating element. In such a case, disconnect the heating element from the mains and
call a service provider.
2.5.4 - Possible faults
If the heating element is controlled by a heating controller and while the green LED marked is lit, the
second green LED marked doesn’t light up, then probably the desired temperature set with the knob of the
adjustable thermostat is lower than that set on the controller. Set the thermostat knob to a higher desired tem-
perature. If this does not help and the second green LED marked doesn’t light up, call a service provider.
If the tank gets overheated without using any other heat source (the adjustable thermostat probably does not
turn off the heating element when the set temperature is reached - the green LED marked is on until both
the LEDs go out), call a service provider.
If the heating element shows signs of another defect, disconnect it from the mains immediately and call
a service provider.
Control from an external controller with Ripple control
3-PHASE CIRCUIT
BREAKER
TERMINAL BOARD
IN ELECTRICAL
SWITCHBOARD OR
ENCLOSURE
MARKING OF CONDUCTORS
AT THE CABLE END
CABLE – PART OF THE HEATING ELEMENT
HEATING ELEMENT
SINGLE-PHASE
CIRCUIT BREAKER
CONTROLLER WITH
230V OUTLET AND
RIPPLE CONTROL

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Control from an external controller without Ripple control
Control by the integrated thermostat without Ripple control
Control by the integrated thermostat with Ripple control
3-PHASE CIRCUIT
BREAKER
TERMINAL BOARD
IN ELECTRICAL
SWITCHBOARD OR
ENCLOSURE
MARKING OF CONDUCTORS
AT THE CABLE END
CABLE – PART OF THE HEATING ELEMENT
HEATING ELEMENT
SINGLE-PHASE
CIRCUIT BREAKER
CONTROLLER WITH
230V OUTLET
3-PHASE CIRCUIT
BREAKER
TERMINAL BOARD
IN ELECTRICAL
SWITCHBOARD OR
ENCLOSURE
MARKING OF CONDUCTORS
AT THE CABLE END
CABLE – PART OF THE HEATING ELEMENT
HEATING ELEMENT
3-PHASE CIRCUIT
BREAKER
TERMINAL BOARD
IN ELECTRICAL
SWITCHBOARD OR
ENCLOSURE
MARKING OF CONDUCTORS
AT THE CABLE END
CABLE – PART OF THE HEATING ELEMENT
HEATING ELEMENT

Heating Element with Thermostatic Head,
three-phase, xed wiring
WARRANTY CERTIFICATE
Type: .......................................................................................
Serial number: .......................................................................
Shop: .......................................................... Purchase date: ...............................
1. The warranty period is 24 months from the date of purchase.
2. The product will be installed and commissioned by a competent company or a person
trained by the manufacturer.
3. When claiming warranty, this Warranty Certicate must be submitted together with the
purchase receipt.
4. The warranty is valid only when the technical conditions set by the Manufacturer,
installation manual and instructions in the documentation and on the product itself are
maintained.
5. The warranty does not cover defects caused by external conditions or improper opera-
tion conditions, defects caused by usual wear and tear, further when the product is not
used in compliance with its purpose and when the defect was caused by mechanical
damage, improper handling, tampering by a third person, improper installation, improper
stocking, natural disaster etc.
COMMISSIONING
Company: …………………....................……………..
Date: ……………….................................……..
Rubber stamp print and signature of the installer:
WARRANTY CONDITIONS
©2021 We reserve the right to errors, changes and improvements without prior notice.
REGULUS spol. s r.o.
E-mail: [email protected]
Web: www.regulus.eu
v1.0-10/2021