Thermona THERM EL 23 Bedienungsanleitung

Thermona Durchlauferhitzer und Boiler THERM EL 23

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Operation and
Maintenance
Manual for
Electric Boilers
(user manual)
version: February, 2008
THERM EL 8
THERM EL 15
THERM EL 23
THERM EL 30
THERM EL 38
THERM EL 45
2
1. CONTENTS
1.
CONTENTS ................................................................................................................................................ 2
2.
GENERAL USE ......................................................................................................................................... 3
3.
GENERAL CHARACTERISTICS OF THERM – EL ELECTRIC BOILERS .................................. 3
4.
TECHNICAL DATA ................................................................................................................................. 7
5.
BASIC INSTRUCTIONS FOR BOILER INSTALLATION................................................................. 8
6.
BOILER OPERATION ........................................................................................................................... 13
7.
BOILER CONTROL AND DISPLAY OF BASIC OPERATIONAL INFORMATION .................. 16
8.
USER MENU ............................................................................................................................................ 19
9.
PUTTING THE BOILER INTO OPERATION.................................................................................... 21
10.
DIAGRAM FOR SERVICEABLE CONNECTING CHARGE PRESSURES OF HEATING WATER
....... 23
11.
THERM EL BOILERS CONNECTION TO THE POWER SUPPLY............................................... 24
12.
WARRANTY AND RESPONSIBILITY FOR DEFECTS................................................................... 31
13.
DOMESTIC HOT WATER STORAGE TANK HEATING MODE .................................................. 31
14.
THERM EL 8, 15, 23 BOILER ASSEMBLY (KW) ............................................................................. 33
15.
THERM EL 30, 38, 45 BOILER ASSEMBLY (KW) ........................................................................... 34
16.
WALL-MOUNTING OF THE BOILER ............................................................................................... 35
17.
BOILER DIMENSIONS AND CONNECTION.................................................................................... 35
18.
RECORD OF REPAIRS AND ANNUAL INSPECTIONS.................................................................. 36
3
2. General use
The construction of THERM-EL electric boilers is designed for hot-water heating systems with induced
water circulation. They can be installed in central or individual-storey heating with induced circulation sealed or
open systems and they are characterized by an environmentally friendly operation without requirements for
venting of the combustion product. Service-free operation enables the installation of an external regulator, other
external regulating or controlling components (not included in the boiler delivery package!), simple equitherm
regulator or room thermostat integrated directly in the automatic controlling system which maintains the pre-set
room temperature. The electric boiler can be used as a universal source of heat for heating flats, small family
houses, resort houses and also as an alternative source to another main heat source of heating and hot water
preparation (also for transitional periods) – for heat pumps, accumulation systems or in previously installed
central or single-storey heating systems etc. To attain higher output levels, boilers can be connected into a
cascade format.
3. General characteristics of THERM – EL electric boilers
Therm-EL electric boilers are wall-mounted appliances designed for water heating in a heating system and
potentially for domestic hot water heating (hereinafter referred to as “DHW”) in an indirect heating storage
tank.
THERM-EL electric boilers are manufactured in three performance versions in the lower output category:
8, 15 and 23 kW. The higher output series offers the following three types: 30, 38 and 45 kW. Structural
design as well as controlling system of these boilers are almost identical to the lower output series.
The electric boiler is formed by a steel vessel with inbuilt heating bars, heating temperature probe and safety
thermostat (these components are all located under one cover in the upper part of the vessel). The vessel is made
from a varnished steel sheet and it is fitted with thermal insulation. Heating water inlet, on which a circular
pump is mounted, is welded at the bottom part of the boiler. A lug located in the upper part of the vessel is
adjusted to the cup for the boiler temperature sensor and emergency thermostat. Heating water outlet and
threaded sleeve pieces are also located in the upper part of the vessel. Heating bars (up to 6) are screwed in the
sleeve pieces. Total output of each heating bar is 7.5 kW (there are three separate heating bodies with the output
of 2.5 kW in each heat bar). An automatic vent valve is placed at the highest point of the water heating circuit.
The boiler control box enables connection of an external room thermostat, addition of interface for the boiler
cascade connection type, programmable (time) switch and MRC (mass remote control) tariff switch.
Switching and electric line protection of the boiler and output inlets for the heating bars are not
located in the boiler but they always form part of the electric distributor of the flat or house. Terminals of the
main wiring are concentrated in the right part of the boiler. A sufficiently rated output line contactor or switch
(correctly marked!) which are used for disconnecting the electric boiler from the power network must be
connected right next to the boiler during its installation.
♦ Boiler operation characteristics:
Operational stage of the boiler is launched when heating system temperature drops below the temperature
set on the boiler control panel or on the room thermostat. Control circuit of the heating bars becomes activated
and heating water inside the boiler body becomes heated gradually. After the required temperature has been
reached in the room (if a room thermostat is applied), the control microprocessor unit starts switching off the
heating bodies one by one and the heating of the water stops. At this moment the function of an adjustable
limited pump deceleration (in terms of time or temperature) becomes activated.
As standard, Therm-EL boilers are also fitted with emergency thermostat which delivers maximum safety.
It is connected to the control circuit of the integrated output contactor. The disconnection of the emergency

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Marke: Thermona
Kategorie: Durchlauferhitzer und Boiler
Modell: THERM EL 23

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