Regulus ETT-U User manual

www.regulus.eu
ETT-U Heating Element
ETT-U Heating Element
EN
Installation and Operation Manual
Heating Element with Thermostatic Head

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1 - General Information
1.1 - Application
The electric heating element is intended for DHW heating in a hot water storage tank or for heating of heating
water in thermal stores of a heating system. The element is suitable for utilizing surpluses from single-phase
and three-phase photovoltaic systems.
1.2 - Installation
Screw the electric heating element into the appropriate connection (socket) equipped with a G 6/4“ F thread.
For sealing, we recommend using sealing yarn, hemp, Teflon tape or thread sealant allowing diassembly.
A cable for connection to a terminal box or electrical switchboard is included in supply.
1.3 - Maintenance
Clean the exterior of the heating element with a soft cloth and a suitable detergent. Never use abrasive cleaners
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 heating element.
Scratch the hard deposits on the heating rod with a plastic or wooden spatula and flush with water. Be careful
not to damage the protective nickel layer on the heating rod. Then reinstall the body according to this instruction
manual, fill the tank with water, air-bleed and pressurize it. Check the threaded connection for leaks. Finally,
reconnect 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, identifies 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
2.1 - Technical description
The electric heating element consists of a nickel-plated heating rod with G 6/4“ M thread, a combined 3-phase
capillary thermostat (the operating thermostat is adjustable between 25 °C and 85 °C - the upper limit is set to
60 °C for use in hot water tanks, the manual reset safety thermostat set to 99 °C fixed temperature), and a 2m
power cable for a fixed connection to a terminal box or electrical switchboard.
2.2 - Dimensions
Technical Data
Electrical wiring 1/N/PE AC 230 V
3/N/PE AC 400/230 V
IP rating by EN 60529 IP 54
Protection class by EN 61140 ed. 2 I
Body type electric, resistive, nickel-plated, with thermostatic head
Adjustable thermostat adjustable from 25 to 85 °C
Safety thermostat fixed temp. at 99 °C
Safety thermostat reset manual, after temperature drop by 10 K min.
Max. current at thermostat contacts 20 A
Cable gland Pg 13
Connection thread G 6/4"M outside
Connection to mains cable for a fixed connection to a terminal box or
electrical switchboard, 2m long.
80 L
115
90
60
Pg 13
22
Element type Nominal output Element length L
[mm]
Non-heating end
length [mm]
Power cable
(L=2m) Code
ETT-U − 2,0 2,0 kW 310 180 5x1,5 20214
ETT-U − 3,0 3,0 kW 370 180 5x2,5 20220
ETT-U − 5,0 5,0 kW 500 180 5x2,5 20216
ETT-U − 6,0 6,0 kW 555 180 7x1,5 20219

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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 table 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) Calcium Chlorides Mg Na Fe
max. value 6,5-9,5 600 mg/litr 40 mg/litr 100 mg/litr 20 mg/litr 200 mg/litr 0,2 mg/litr
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,
fixed wiring, using the cable included in supply. The installation shall meet valid rules and standards and shall
be done by an authorized person only.
2.4 - Wiring Diagram
- for 2-, 3- and 5kW heating elements
- for 6kW heating element

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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, fill the tank with water and airbleed it by
opening the hot-water tap. Set the thermostat knob to the desired temperature.
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 fluid, air-bleed it and pressurize to the working pressure. Set the thermostat
knob to the desired temperature.
If you wish to set a higher temperature than 60°C, the limiting spring under the knob needs to be removed.
Instructions:
Remove the knob from the thermostat shaft.
The limiting spring inside the knob is inserted in the
groove 31 (see fig.) which limits the set temperature
to 60 °C. Take out this spring and refit the knob onto
the thermostat shaft.
This modification will increase the thermostat
adjustmemnt range to 15-85 °C.
2.5.3 - Possible faults
When the safety temperature is reached, the safety
thermostat disconnects the heating element from the electricity supply. The safety thermostat features no automatic
reset. After the tank temperature drops by min. 10 K pry off the white plastic cap (see picture) with a screwdriver,
press the button and click the cap back. Repeated occurrence of this condition indicates a failure of the heating
element. In such a case, disconnect the heating element from mains and call a service technician.
If the heating element shows signs of another defect, disconnect it from the mains immediately and call a service
provider.

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Heating Element with Thermostatic Head
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 Certificate 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

©2023 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
v1.0-08/2023