control

VärmeKabelTeknik

Control – Control cabinets

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Control – Control cabinets 2

VärmeKabelTeknik Index

Typee codes ....................................................................................................................................... 2 The construction of the three‐phase group ................................................................................... 3‐4 Functional description Control cabinet Typee 01 ........................................................................... 5 "‐ Typee 01‐ROOF ................................................................. 6 "‐ Typee 02‐FROST ................................................................ 7 "‐ Typee 11‐21‐31‐41(22/33/44) .......................................... 8 "‐ Typee 11‐21‐31‐41 ROOF.................................................. 9 "‐ Typee 11‐21‐31‐41 MAX‐MIN ......................................... 10 "‐ Typee 11‐21‐31‐41 EBERLE SURFACE ............................ 11 "‐ Typee 11‐21‐31‐41 EBERLE ROOF ................................... 12 Thermostats .................................................................................................................................... 13 De‐icing regulators .....................................................................................................................14‐15 Diagram Typee 01 / Type 01 ROOF ............................................................................................... 16 " Typee 11‐21‐31‐41 ......................................................................................................... 17 "‐ Typee 11‐21‐31‐41 ROOF ............................................................................................... 18 "‐ Typee 11‐21‐31‐41 SURFACE .......................................................................................... 19 “‐ Typee 11‐21‐31‐41‐IC ROOF ........................................................................................... 20

Type codes

Dubbla givare

RoofThermostat

regulator

Is-/Snösmältnings-

–10..+95°C

4 st termonic

–10..+95°C

3 st termonic

–10..+95°C

2 st termonic

–10..+95°C

Typee of application

1 st termonic

Typee of control cabinet

Pipe heating/Frost protection Max Output 2 kW

Type 01

Max Output 6 kW

Type 11

Max Output 12 kW

Type 21

Type 22

Max Output 18 kW

Type 31

P

Type 32

P

Type 33

Type 41

P

Type 42

P

P

Max Output 24 kW

Type43

P

Type44

P

Type44

P

Floor heating/Industry Max Output 2 kW

Type 01

Max Output 6 kW

Type 11

Max Output 12 kW

Type 21

Type 22

Max Output 18 kW

Type 31

P

Type 32

P

Type 33

Type 41

P

Type 42

P

P

Max Output 24 kW

Type43

P

Surface heating/Melting-off snow Max Output 2 kW

Type 01

Max Output 6 kW

Type 11

Type 11MM*

Type 11IC

Max Output 12 kW

Type 21

Type 22MM*

Type 21IC

Max Output 18 kW

Type 31

P

Type 41

P

Max Output 24 kW

P

Type 32MM*

Type 33

Type 42MM*

P

Type43

Type44

P

P

Type 31 IC

P

Type 41 IC

P

Frostprotection of gutters and downpipes Max Output 2 kW Max Output 6 kW

* P

Type 01 Roof

Max Output 12 kW

Type 11IC

Type 11 Roof

Max Output 18 kW

Type 21IC

P

Type 21 Roof

Max Output 24 kW

Type 31 IC

P

Type 31 Roof

Type 41 IC

P

Type 41 Roof

Control cabinet with limiting thermostat(breaks at set‐point max/min temperature) Control cabinet enclosure made of sheet steel, class IP55 (key lock on request)

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Control – Control cabinets 3

The construction of the three-phase group All standard‐design Värmekabelteknik control cabinets are factory assembled with complete three‐phase groups made up of: Siemens earth‐leakage‐circuit breaker (ELCB) (one four‐ pole breaker per three‐phase group Siemens circuit‐breakers ( three circuit breakers per three‐phase group) Siemens 4x20A contactor (one contactor per three‐ phase group VKT’s LED indicator module containing current transformers

Main switch

Snow and ice melting ground installations: Here, high‐ output systems (typically 300 W/m²) are required: The Eismelder snow melting regulator with ground sensors (moisture and temperature sensors and a heated ice and snow sensor) which can be used for all types of ground surfaces, including those carrying heavy vehicles. The sensors are embedded in the surface, level with it, and monitor for the surface temperature and all types of precipitation.

Function: The system’s relay operates when moisture or precipitation is detected on the surface to be protected, and there is at the same time a risk of freezing. There is also a built‐in time‐delay relay to compensate for any variations in the surface. This configuration will minimize operating costs and maximize performance.

Each control cabinet contains a main switch Siemens adapted to the maximum load rating of the cabinet.

Special control cabinets

Control group construction

Control cabinets with different types of regulators are also available, from single‐channel on/off regulators to 10‐channel multiloop regulators with connections for remote control via PC via a two‐wire or telephone and modem connection.

The control group consists of a Siemens control switch, a Siemens 6A circuit‐breaker and a control unit.

To avoid overloading the electricity supply system after a mains failure, the larger control cabinets 31‐41 also have a time delay relay for delayed operation.

Control applications Floor heating, pipe tracing, vessel tracing and other applications: The Termonic DIN bus bar thermostat with a thermostat sensor registering the existing temperature of the installation, hysteresis being adjustable.

Roof application: OJ double thermostat for sensing roof and ambient temperatures, permitting operating conditions that make for a relatively low power consumption and an installation that functions well.

Function: The thermostat relay operates when the roof sensor detects above‐zero temperatures (melting) and the wall sensor detects below‐zero temperatures (risk of freezing of gutters, downpipes and drainpipes).

Roof application: The Eismelder snow melting regulator with twin sensors, one for temperature monitoring, the other for moisture detection. This is an attractive alternative for high‐output installations requiring low operating costs.

Function: This type of control is very exact, as switching on only takes place when there is moisture on the moisture sensor (mounted in gutter or moulding) and the temperature sensor at the same time detects a risk of freezing of gutters, downpipes or drainpipes.

We design, construct and build cabinets of all sizes to customer specifications. One example would be the control cabinets we have delivered for controlling ground areas, bridges, stairways and steps at the Globe in Stockholm, where the cabinets are connected to the DUC (a computer sub‐centre) for overall control functions. Another, the control cabinets containing 50‐ 75 three‐phase groups for electrically heated car test courses in the interior of Norrland. That particular high‐ power installation required several hundred kilowatts.

For VärmeKabelTeknik, no control cabinet is too small or too big to make, and no customer requirement too tough to meet.

Fuse options Circuit‐breakers have many advantages over diazed fuses, but these advantages sometimes turn into disadvantages.

The instantaneous trip of a circuit‐breaker when there is a short‐circuit makes it necessary to take into account the starting currents in self‐limiting cables and provide for a wide margin in order to prevent the circuit‐breaker from tripping spontaneously when such an installation is being started in low ambient temperatures. A G‐ characteristic fuse‐link is also applied here, which is extra slow so that for the cables connecting cabinet and heating cables large conductor areas are unnecessary. A further circuit‐breaker drawback to keep in mind is that the continuous load current should not be greater than 80 per cent of rated current (for example, 0.8 x 10A = 8A).

Control – Control cabinets 4 Lockable main switch A control cabinet that is to be mounted in a space (such as the electric‐power room or niche) where access is not restricted by a separate locked door, will be furnished with a lockable main switch if you request this when ordering the cabinet.

Enclosure classes The control cabinet enclosure is made of polystyrol and has a transparent polycarbonate cover. Enclosure class IP55.

The control cabinet enclosure is constructed of enamelled sheet steel. Glazed door and cylinder lock available on request. Enclosure Class IP55 (IP 65 possible with special accessories).

Connections The Värmekabelteknik control cabinets are designed for connection to a five‐conductor system. (Other connection types are available on request).

Each outgoing terminal‐block group consists of an earth terminal block, a neutral terminal block, and three terminal blocks for L1‐L3.

The control cabinets are supplied containing sensors with the sensor wire connected to the designated terminal blocks, except for the IC ground cabinets where the sensors are supplied unconnected.

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Control – Control cabinets 5 Type 01 roof control cabinet: Mode of operation

Type 01 control cabinet: Mode of operation This control cabinet is designed for heating cable applications, 2300W maximum, 230V single phase, on pipes, containers and tanks, and underground and in floors and the like, all with thermostat control.

Components:

one one including one sensor one one

main switch single pole 25A Termonic 26090 thermostat ELCB, two‐pole, 25/0,03A enclosure, Class IP55

The control cabinet is intended for wall mounting and has cable entries on all sides.

Putting into service: ♦

Using a screwdriver, set the thermostat (Termonic) adjustment knob for the required temperature (the temperature range may have to be adjusted.

♦

Put the ELCB toggle switch in the ON position.

♦

Turn the main switch to the ON position.

When the current has been switched on, the sensor LEDs light up indicating status as explained below.

Termonic 26090 Red LED lighting up: sensor fault or temperature range incorrectly set.

Yellow LED lighting up: thermostat operating (sensor temperature below preset value).

Adjustments If melting is too slow, or partially inadequate, on the surface being heated, then the thermostat may be adjusted upwards by one degree at a time. Check the surface again after a couple of hours. Adjusting the thermostat upwards by a large amount brings with it a large increase in current consumption.

This control cabinet is intended for thermostat‐ controlled frost protection of gutters and downpipes.

Components: one main switch, single‐pole, 25A one ETF 1442 thermostat (double‐sensor thermostat for gutters) including two sensors one ELCB, two‐pole, 25/0,03A one enclosure, Class IP55 The control cabinet is intended for wall mounting and has cable entries on all sides.

Putting into service ♦ ♦ ♦

Using a screwdriver, adjust the ETF 1442 thermostat adjusting knob. Initial setting should be: Low ‐2 °C / High +2 °C. Put the ELCB toggle switch in the ON position.

Turn the main switch to the ON position.

When the current has been switched on, the sensor LEDs light up indicating status as explained below.

ETF 1442 Roof thermostat Yellow LED light on: temperature is above preset operating temperature.

Green LED light on: temperature is below preset operating temperature.

Red LED light on: thermostat operating.

The thermostat operates on the basis of the plus/minus system using two sensors: the ”Low” sensor, in conduit, is located on the roof and will detect any ”thawing temperature” on the roof, that is to say, if the temperature exceeds the preset ”Low” value.

At the same time, the ”High” sensor, located on a wall facing north, will sense any air temperature falling below the preset ”High” value and causing ice to be formed in gutters and downpipes.

Adjustments If, in certain weather conditions, icicles or surface ice should form, then the thermostat knobs may be adjusted in the following way: Check the thermostat LEDs. If the green light is on: turn the “Low” adjustment knob clockwise towards a lower temperature, until the red LED lights up.

If the yellow light is on: turn the “High” adjustment knob anti‐clockwise towards a higher temperature.

For lowest possible operating costs, the knobs should be adjusted so as to be as close as possible to zero!

Control – Control cabinets 6 Type 02 Frost control cabinet: Mode of operation This control cabinet is intended for heating‐cable installations with a maximum output of 2300W (three‐ phase), where the heating cable is installed for the frost protection of the floors of cold storage rooms, using thermostat control.

The control cabinet is equipped with an alarm thermostat whose temperature sensor is placed next to the sensor of the operation thermostat.

The alarm thermostat is fed from a separate phase with its own fuse which does not pass through an earth‐ leakage‐circuit breaker. This is to ensure that the alarm does not stop functioning if the supply voltage for the heating coil should fail for some reason.

Components: one main switch one control switch, manual‐0‐automatic two Termonic 26090 thermostat including sensors one ELCB, two‐pole, 25/0,03A two circuit‐breakers one enclosure, Class IP55 The control cabinet is intended for wall mounting and has cable entries on all sides.

Putting into service: ♦

Using a screwdriver, set the operation thermostat (Termonic) adjustment knob for the required temperature and make sure the temperature range is set to –15 ‐ +95°C.

♦

Using a screwdriver, set the alarm thermostat (Termonic) adjustment knob for the required temperature, about +2°C, and make sure the temperature range is set to –15 ‐ +95°C.

♦

Put the ELCB toggle switch in the ON position.

♦

Turn the main switch to the ON position.

When the current has been switched on, the sensor LEDs light up indicating status as explained below.

Termonic 26090 Red LED lighting up: sensor fault or temperature range incorrectly set.

Yellow LED lighting up: thermostat operating (sensor temperature below preset value).

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Adjustments Change of temperature range in order to avoid end positions. An incorrect temperature range may led to a sensor malfunction being indicated.

Connecting up The cabinet is connected to 2 separate phases: zero and earth.

The 4 x 1,5 mm² supply cable is connected to the main switch of the cabinet and to the neutral and earth terminal blocks.

The heating coils are connected to the cabinet’s earth terminal block (G‐G), to the neutral terminal block (terminal block 1), and to the outgoing phases L1 (terminal block 2).

The alarm is connected to a potential‐free terminal with optional voltage.

The sensor lead (integral, 3m) may be jointed up to a length of 50m without affecting temperature adjustment knob accuracy. The sensor is connected to terminal block using 2 x 1.5mm².

(For block numbering, see diagram.)

VärmeKabelTeknik Types 11-21-31-41(22/33/44) control cabinets: Mode of operation

Control – Control cabinets 7 Adjustments Hysteresis (number of degrees between thermostat switching on and thermostat switching off) must be adjusted in such a way that the thermostat meets the temperature‐control accuracy requirements.

Control cabinet 11 is intended for max 3 x 2300W (three‐phase) heating‐ cable installations 21 is intended for max. 6 x 2300W (three‐phase) heating‐cable installations 31 is intended for max. 9 x 2300W (three‐phase) heating‐cable installations 41 is intended for max. 12 x 2300W (three‐phase) heating‐cable installations

It should be noted that the service life of the thermostat relay will be shorter if settings are used which produce low hysteresis in cases of fast processing.

This control cabinet is designed for heating‐cable applications on pipes, containers and tanks, and underground and in floors and the like, all with thermostat control.

Change of temperature range in order to avoid end positions. An incorrect temperature range may lead to a sensor malfunction being indicated.

This cabinet may be designed to special order for loads exceeding 10A per phase.

Connecting up Connection of the cabinet is made to a 5‐conductor system.

Components: one main switch, three‐pole one control switch, manual‐0‐automatic one Termonic 26090 thermostat including one sensor (cabinets 22,33,44 have one thermostat for each three‐ phase group) one/two/three/four Ccontactor(s), 4 x 20A one/two/three/four ELCB(s), four‐pole, 25/0,03A one/two/three/four Ooperating status indicator(s) for three phases four/seven/eleven/thirteen Circuit‐breakers one Enclosure, Class IP55 The control cabinet is intended for wall mounting and has cable entries on all sides.

Putting into service ♦ ♦ ♦

Using a screwdriver, set the thermostat (Termonic) adjustment knob for the required temperature (the temperature range may have to be adjusted).

Put the ELCB toggle switch in the ON position.

Turn the main switch to the ON position.

When the current has been switched on, the sensor LEDs light up indicating status as explained below.

Termonic 26090 Red LED light on: sensor fault or temperature range incorrectly set.

Yellow LED light on: thermostat operating (sensor temperature below preset value).

If the thermostat and/or succeeding contactors should rattle on release, then hysteresis should be somewhat increased.

The 5 x 1,5 mm² supply cable (maximum 5 x 4mm²) is connected to the main switch of the cabinet and to the neutral and earth terminal blocks.

The heating coils are connected directly to the cabinet’s earth terminal block (G‐G), to the neutral terminal block (terminal block 1), and to the outgoing phases L1 (terminal block 2), L2 (terminal block 3) and L3 (terminal block 4), alternatively to 5 x 1,5mm² or to 3 3 x 1,5mm² for further connecting to a junction box and/or junction boxes.

Control – Control cabinets 8 Types 11-21-31-41 Roof control cabinets: Mode of operation Control cabinet 11 is intended for max. 3 x 2300W three‐phase heating‐ cable applications 21 is intended for max. 6 x 2300W three‐phase heating‐ cable applications 31 is intended for max. 9 x 2300W three‐phase heating‐ cable applications 41 is intended for max. 12 x 2300W three‐phase heating‐cable applications This control cabinet is intended for the thermostat‐ controlled frost protection of gutters and downpipes.

This cabinet may be designed to special order for loads exceeding 10A per phase.

Components: one main switch, three‐pole one control switch, manual‐0‐ automatic one ETF 1442 thermostat (double ther mostat for gutters) including two sensors one/two/three/four contactor(s), 4 x 20A one/two/three/four ELCB(s), four‐pole, 25/0,03A one/two/three/four operating status indicator(s) for three phases three/six/nine/twelve circuit‐breakers, plus control 6A one enclosure, Class IP54 This control cabinet is intended for wall mounting and cable entry is via top and bottom.

Putting into service: Adjusst the ETF 1442 thermostat adjusting knobs. Initial setting should be: Low ‐2 °C / High +2 °C. ♦ ♦

Put the ELCB toggle switch in the ON position.

Turn the main switch to the ON position.

When the current has been switched on, the sensor LEDs light up indicating status, as explained below.

ETF 1442 Roof thermostat Yellow LED light on: temperature is above preset operating temperature.

Green LED light on: temperature is below preset operating temperature.

Red LED light on: thermostat operating.

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The thermostat operates on the basis of the plus/minus system using two sensors: the “Low” sensor, in conduit, is located on the roof and will detect any “thawing temperature” on the roof, that is to say, if the temperature exceeds the preset “Low” value.

At the same time, the “High” sensor, located on a wall facing north, will sense any air temperature falling below the preset “High” value and causing ice to be formed in gutters and downpipes.

Adjustments If, in certain weather conditions, icicles or surface ice should form, then the thermostat knobs may be adjusted in the following way: Check the thermostat LEDs. If the green light is on: turn the ”Low” adjustment knob clockwise towards a lower temperature, until the red LED lights up.

If the yellow light is on: turn the ”High” adjustment knob anti‐clockwise towards a higher temperature.

For lowest possible operating costs, the knobs should be adjusted so as to be as close as possible to zero.

Connecting up Connection of the cabinet is made to a 5‐conductor system.

The 5 x 1,5 mm² supply cable (maximum 5 x 4mm²) is connected to the main switch of the cabinet and to the neutral and earth terminal blocks.

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Control – Control cabinets 9

Types 11-21-31-41Max-min control cabinets: Mode of operation

When the current has been switched on, the sensor LEDs light up indicating status, as explained below.

Control cabinet 11 is intended for max 3 x 2300W three‐phase heating‐ cable installation 21 is intended for 6 x 2300W three‐phase heating‐cable installation 31 is intended for max 9 x 2300W three‐phase heating‐ cable installation 41 is intended for max. 12 x 2300W three‐phase heating‐cable installation

Termonic 26090 Red LED lighting up: sensor fault or temperature range incorrectly set.

Yellow LED lighting up: thermostat operating (sensor temperature below preset value)

This control cabinet is designed for heating‐cable applications on pipes, containers and tanks, underground and in floors and the like, all with thermostat control.

This cabinet may be designed to special order for loads exceeding 10A per phase.

Components: one main switch, three‐pole one control switch, manual‐0‐ automatic two Termonic 26090 thermostats, including two sensors one/two/three/four contactor(s), 4 x 20A one/two/three/four ELCB(s), four‐pole, 25/0,03A one/two/three/four operating status indicator(s) for three phases four/seven/eleven/thirteen circuit‐breakers one enclosure, Class IP55 This control cabinet is intended for wall mounting and cable entry is via all sides.

Function The cabinet controls the temperature of a surface, keeping it to the value preset on T2. Heating is switched off if ambient air temperature falls below the value preset on T2.

Putting into service ♦ Using a screwdriver, set the operation thermostat T2 adjustment knob for the required operating temperature (the temperature range may have to be adjusted. ♦ Using a screwdriver, set the air thermostat T1 temperature adjustment knob for the required release temperature (the temperature range may have to be adjusted). ♦ Put the ELCB toggle switch in the ON position. ♦ Turn the main switch to the ON position.

Adjustments Hysteresis (number of degrees between thermostat switching on and thermostat switching off) must be adjusted in such a way that the thermostat meets the temperature‐control accuracy requirements.

It should be noted that the service life of the thermostat relay will be shorter if settings are used which produce low hysteresis in cases of fast processing.

If the thermostat and/or succeeding contactors should rattle on release, then hysteresis should be somewhat increased.

Change of temperature range in order to avoid end positions. An incorrect temperature range may lead to a sensor malfunction being indicated.

Connecting up Connection of the cabinet is made to a 5‐conductor system.

The 5 x 1,5 mm² supply cable (maximum 5 x 4mm²) is connected to the main switch of the cabinet and to the neutral and earth terminal blocks.

The heating coils are connected directly to the cabinet’s earth terminal block (G‐G), to the neutral terminal block (terminal block 1), and to the outgoing phases L1 (terminal block 2), L2 (terminal block 3) and L3 (terminal block 4), alternatively to 5x1,5mm² or to 3 3 x 1,5mm² for further connecting to a junction box or junction boxes.

The T1 sensor should be mounted in, for example, conduit or in a junction box on a wall facing north. The T2 sensor should be mounted in conduit between cable turns.

The sensor lead (integral, 3m) may be jointed up to a length of 50m without affecting temperature adjustment knob accuracy. The sensor is connected to terminal block 117, 118 using 2 x 1,5 mm²..

Control – Control cabinets 10

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Types 11-21-31-41 EBERLE Ground control cabinets: Mode of operation Control cabinet 11 is intended for max. 3 x 2300W three‐phase heating‐ cable installation 21 is intended for max.6 x 2300W three‐phase heating‐ cable installation 31 is intended for max. 9 x 2300W three‐phase heating‐ cable installation 41 is intended for max. 12 x 2300W three‐phase heating‐cable installation This control cabinet is designed for heating‐cable ground installations under asphalt, paving and concrete.

This cabinet may be designed to special order for loads exceeding 10A per phase.

Components: one one one

main switch, three‐pole control switch, manual‐0‐ automatic Eberle snow and ice mel‐ ting regulator plus

amplifier and moisture/temperature sensors one/two/three/four contactor(s), 4 x 20A one/two/three/four ELCB(s), four‐pole, 25/0,03A one//two/three/four operating status indica tor(s) for three phases four/seven/eleven/thirteen circuit‐breakers one enclosure, Class IP55 This control cabinet is intended for wall mounting and cable entry is via all sides.

Putting into service ♦

Put the ELCB toggle switch in the ON position.

♦

Set all circuit‐breakers to ON.

♦

Turn the main switch to the ON position.

♦ Check all the settings in the Eberle with the table found in the “Operation” section of the enclosed description.

How the snow and ice melting regulator functions The snow and ice melting regulator consists of a control unit and two ground sensors: one heated moisture sensor and one unheated temperature sensor. The heating element is switched on when the predetermined moisture and temperature values are reached, thus minimizing energy consumption, provided the correct adjustments have been made.

The control unit is supplied preprogrammed using a standard program which is suspended when you adapt it to suit your own needs with the help of various menus. If there is a problem, the unit may be easily reset to the standard program by pressing a key.

Adjustments available include temperature, moisture sensivity, basic heating function, and heating after the sensor is dry.

Readings available include total operating time (resettable to zero), sensor temperatures, and fault messages if any part of the unit is not working properly.

The ground sensors, which are embedded in the ground surface and level with it, are of two types: one monitoring for ground temperature and moisture, and one which is heated and so can detect frozen precipitation.

Connecting up Connection of the cabinet is made to a 5‐conductor system.

The 5 x 1,5 mm² supply cable (maximum 5 x 4mm²) is connected to the main switch of the cabinet and to the neutral and earth terminal blocks.

The heating coils are connected directly to the cabinet’s earth terminal block (G‐G), to the neutral terminal block (terminal block 1), and to the outgoing phases L1 (terminal block 2), L2 (terminal block 3) and L3 (terminal block 4).

Each sensor lead (integral, 10m) may be jointed in a junction box using a screened 5 x 1,5mm² cable, up to a length of 50m (4‐conductor cable may be used for unheated sensor)

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Control – Control cabinets 11

Types 11-21-31-41 EBERLE roof control cabinets: Mode of operation Control cabinet 11 is intended for max 3 x 2300W three‐phase heating‐ cable installations 21 is intended for max 6 x 2300W three‐phase heating‐ cable installations 31 is intended for max 9 x 2300W three‐phase heating‐ cable installations 41 is intended for max 12 x 2300W three‐phase heating‐ cable installations This control cabinet is designed for heating‐cable installations in gutters and downpipes, at bases of roofs, and on roof surfaces and ice melting.

This cabinet may be designed to special order for loads exceeding 10A per phase.

Components:

one main switch, three‐pole one control switch, manual‐0‐

automatic one Eberle regulator consisting of control unit including gutter and temperature sensors one/two/three/four contactor(s), 4 x 20A one/two/three/four ELCB(s), four‐pole, 25/0,03A one/two/three/four operating status indicator(s) for three phases four/seven/eleven/thirteen circuit‐breakers one enclosure, Class IP55 This control cabinet is intended for wall mounting and cable entry is via all sides.

Putting into service ♦

Put the ELCB toggle switch in the ON position.

♦

Set all circuit‐breakers to ON.

♦

Turn the main switch to the ON position.

Check all the settings in the Eberle with the table found in the “Operation” section of the enclosed description.

How the snow and ice melting regulator functions The snow and ice melting regulator consists of a control unit and two sensors: one heated gutter moisture sensor and one unheated temperature sensor. The heating element is switched on when the predetermined moisture and temperature values are reached, thus minimizing energy consumption, provided the correct adjustments have been made.

The control unit is supplied preprogrammed using a standard program which is suspended when you adapt it to suit your own needs with help of various menus. If there is a problem, the unit may be easily reset to the standard program by pressing a key.

Adjustments available include temperature, moisture sensitivity, basic heating function, and heating after the sensor is dry.

Readings available include total operating time (resettable to zero), sensor temperatures, and fault messages if any part of the unit is not working properly.

The heated snow and ice sensor is mounted in the gutter, between or next to the heating‐cable runs but not in direct contact with them. The temperature sensor is mounted against the outside of the gutter or in some other shaded location near to where the heating‐cable installation is.

Connecting up Connection of the cabinet is made to a 5‐conductor system.

The 5 x 1,5 mm² supply cable (maximum 5 x 4mm²) is connected to the main switch of the cabinet and to the neutral and earth terminal blocks.

The heating coils are connected directly to the cabinet’s earth terminal block (G‐G), to the neutral terminal block (terminal block 1), and to the outgoing phases L1 (terminal block 2), L2 (terminal block 3) and L3 (terminal block 4).

Each sensor lead (integral, 10m) may be jointed in a junction box using a screened 5 x 1,5mm² cable, up to a length of 50 meter (4‐conductor cable may be used for unheated sensors).

Control – Control cabinets 12

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Siemens circuit‐breakers

2

Normally, single‐pole C‐Characteristic circuit‐breakers are mounted in our cabinets.

For roof applicatios involving self‐limiting heating cable, D‐Characteristic circuit‐ breakers are also used.

Siemens ELCB

1

1

3

5

N

2

4

6

N

All our control cabinets are equipped with two‐pole or four‐pole 25A ELCBs having a tripping current of 30mA.

Supply voltage Power consump.

Ambient temp.

Max load Contacts Hysteresis Type of sensor Length of sensor Temp.area26090 26150 Enclosure class

230V 1,5VA ‐10‐+55°C 10A 1 vx pot.fri 1‐10°K PTC 3m(max 50m) ‐15 ‐ +95°C ‐15 ‐ +150°C IP 40

The Termonic 26090/26150 are all‐round thermostats used in our control cabinets for floor heating, frost protection, cistern tracing and the like.

Supply voltage Power consump.

Ambient temp.

Max load Contacts Hysteresis Temp.area high low LED indication

230V 3VA ‐20‐+50°C 10A 1 closing 0,4°C 0 ‐ +10°C 0 ‐ ‐10°C Red, yellow, green

This thermostat (ETR‐1442) was designed especially to keep operating costs down while preserving its good performance. It works on the principle of two sensors sensing when snow and ice on the roof are melting and ambient temperatures are dropping below zero, a situation which may lead to freezing of downpipes.

T

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Control – Control cabinets 13

The New Generation of Snow and Ice melting regulators

EBERLE 524 87

Eberle Ground

Eberle Roof

This regulator is intended for snow and ice melting on ground surfaces and will, if correctly adjusted, save 60 per cent of operating costs compared with a normal thermostat. This is an argument in favour of installing it where power requirement is greater than 3 kW, for it provides the most economical way of keeping a surface snow and ice free. The regulator senses all forms of precipitation as well as any moisture forming when snow or ice is melting, and so does not switch off the heating element until the surface is dry.

A snow and ice melting regulator will save 40 per cent on operating costs over a thermostat controlled system, as the regulator also has a sensor which detects moisture and all forms of precipitation. The cost of installing a snow and ice melting regulator is fully justified for systems requiring an output of more than 4 to 6 kW. The regulator makes possible complete melting, as it detects the existence of any moisture in the gutter and so does not switch off the heating element until the gutter is dry and the temperature dependent period of time, during which the after‐ heating is on, has passed. This period is between 20 and 120 minutes long

Wiring diagram Ground EBERLE EM 524 87 Y/D- Kopplare EMSD 52488 A3

A4

A5

A6

A7

A8

A9

A10

A11

A12

A13

A14

A15

A16

B2

B3

B4

B5

B6

B7

B8

B9

B10

B11

B12

B13

B14

B15

B16

Gul

Grön

Grå

Vit

Brun

Grå

Gul

Vit

Brun

L

Tempgivare

Fukt / Tempgivare TFF 524 002

Is / snögivare ESF 524 001

029

A2

B1

028

A1

Larmkontakt Utgång värme

N

230V AC

TFD 524004

Wiring diagram Roof EBERLE EM 524 87 Y/D- Kopplare EMSD 52488 A1

A2

A3

A4

A5

A6

A7

A8

A9

A10

A11

A12

A13

A14

A15

A16

B1

B2

B3

B4

B5

B6

B7

B8

B9

B10

B11

B12

B13

B14

B15

B16

Is / Snögivare ESD 524 003

029

Brun

Gul

Grön

Grå

Vit

028

82 Kohm

Tempgivare TFD 524004

L

N

230V AC

Larmkontakt Utgång värme

Control – Control cabinets 14

VärmeKabelTeknik

Eberle Snow and ice melting regulators

TECHNICAL SPECIFICATION

For larger heating‐cable installations involving gutters and downpipes, garage driveways, footpaths, car parks and the like, where ice formation must be prevented for reasons of safety and convenience, it is always a good idea to install a snow and ice alert together with the heating cable.

A large installation must meet the basic requirement of allowing its operating costs to be kept in check. An ice alert device which combines temperature and snow and/or moisture (which could result in slippery surfaces and ice formation) makes for radically lower operating costs compared with thermostat control.

Rated voltage ..................................................... 230 VAC Power consumption ............................................. <15 VA Ambient temperature .................................. ‐20 ‐ +70°C Protection class .................. IP 20 according to EN60 730 Adjustment range ................................................ 0 – 6°C Basic temperature ............................ ‐15 ‐ ‐1°C and OFF Moisture ... 1 (high sensitivity) to 8 (low sensitivity) and OFF After‐heating ....................... 10 min to 120 min and OFF Output terminal, relay .......................... A closing contact Max breaking capacity 10 A cos° =1; 4 A cos° =0,6 at 250 VAC Alarm output terminal, relay ............... A closing contact LCD display ...................................... 2‐line 16 characters Buttons ............................ 3, (Menue / Value / Confirm ) Mounting .................. DIN‐rail according to EN50022‐35 Size ............................................................. 140 x 90 x 59 Weight ............................................................... 0,75 kgs

Sensors

ESD524003

TFD524004

ESF524001

TFF524002

Part.no

E89 991 68

E89 991 67

E89 991 66

E89 991 65

Rated voltage

8 VDC

‐

8 VDC

‐

Power consumption

3W

‐

7W

‐

Connection cable

4 m PVC

4 m PVC

15 m PVC

15 m PVC

5*0,25

2*0,5

5*0,5

4*0,5

VärmeKabelTeknik

Control – Control cabinets 15 Diagram Type 01 Q1 T1 005

Ink.Matning

1

3 6 007

5 006

N

004

L1

107

108

JR1

002

003

8

Denomination Cabinet Main switch ELCB Thermostat Terminal blocks

Manufacturer Legrand Siemens Siemens Termonic Siemens

Type 12mod 2x16A 2‐pol 10A 4mm²

108

107

1

2

Givare

Värmekabel

2

Ink.Matning

1

L1

N

001

4

Note 232x180x115 IP55 25A ‐15 ‐ +90°C

Diagram Type 01 Roof T1 Q1 005

N

1 9

12

13

115

116

004

8

118

2

117

L1

138

139

140

002

137

7

Cabinet Main switch ELCB Thermostat Terminal blocks Termostat Plintar

Note

12mod 312x251x143 2‐pol 16A 2‐pol 25A DubbelThermostat 4mm² Dubbeltermostat 4mm²

108

106

105

2

1

L1

107 Givare vägg (Low)

Type

Givare tak (High)

Manufacture r Legrand Siemens Siemens Calectro Siemens Calectro Siemens

Värmekabel

Denomination

2

Ink.Matning

1

N

001

6

Control – Control cabinets 16

VärmeKabelTeknik Diagram Type 11-21-31-41

( The first digit in the combination indicates the number of three‐phase groups and the second digit the number of control units) Q1 T1 L1 L2

8

4

L3 1 N

3

F13

116

Pe

6

115

5

117

118

F1-F3

JR1

II=AUTO 0=0 I=MAN

K1

2 L

T11 T21 T31 T41

Polystyrol Polystyrol Sheet steel Sheet steel

Givare

118

117

4

2

3

1

Vk.Grupp 1

Ink.Matning

N

1

ENCLOSURE SIZES

376x312x143 501x312x143 700x500x250 800x600x300

Denomination Cabinet Main switch ELCB Circuit breaker Contactor Thermostat Operation status indicator Terminal blocks

Manufacturer Legrand Siemens Siemens Siemens Siemens Termonic VKT Siemens

Type 4x25A 4‐pol 10/16/20/25A 4 x 24A ‐15 ‐ +90°C Current sensing 4mm²

Note IP 55 25A Typically type C

VärmeKabelTeknik

Control – Control cabinets 17 Diagram Type 11-21-31-41 Roof

(The first digit in the combination indicates the number of three‐phase groups and the second digit the number of control units) Q1

T1

L1 8

6

7

N

8

5

115

Pe

12

13

9 116

2

118

1

L3

117

L2

F1-F3 137

JR1

II=AUTO 0=0 I=MAN

K1

2 L

T11 T21 T31 T41

Polystyrol Polystyrol Sheet steel Sheet steel

140

139

Givare vägg (Low)

137

138

3

1

2

4

Givare tak (High)

Ink.Matning

Vk.Grupp 1

N

1

ENCLOSURE SIZES

376x312x143 501x312x143 700x500x250 800x600x300

Denomination Cabinet Main switch ELCB Circuit breaker Contactor Thermostat Operation status indicator Terminal blocks

Manufacturer Legrand Siemens Siemens Siemens Siemens Calectro VKT Siemens

Type 4x25A 4‐pol 10/16/20/25A 4 x 24A Double thermostat Current sensing 4mm²

Note IP 55 25A Typically type C

138

139

140

Control – Control cabinets 18

VärmeKabelTeknik Diagram Type 11-21-31-41 mark

(The first digit in the combination indicates the number of three‐phase groups and the second digit the number of control units) Q1 L1 EBERLE EM 524 87

L2

B16 A16

B14 A14

B15 A15

B13 A13

A11

B12 A12

B11

B9

B4

B2

B3

B1

Pe

B10 A10

A8 B8

A9

A7

A6

B7

A5

B6

A4

B5

A2

A1

N

A3

L3

039

040

64

65

66

67

0=0 I=MAN

K1

2 L 1 K1

61

62

66

67

Vit

Blå

Brun

65

Grå

64

Brun

Givare Is / Snö

Givare Temp/Fukt

63

Gul

62

Grön

Vit

Vk.Grupp 1

Ink.Matning

Grå

4

61

1

2

4

3

003

3

1

001

2

N

002

A2

ENCLOSURE SIZES T11

Polystyrol

376x312x143

T21

Polystyrol

501x312x143

T31

Sheet steel

700x500x250

T41

Sheet steel

800x600x300

Denomination Cabinet

Manufacture Type r Legrand

Note

Main switch

Siemens

4x25A

ELCB

Siemens

4‐pol

25A

Circuit breaker

Siemens

10/16/20/25A

Typically type C

Contactor

Siemens

4 x 24A

Reglering

EBERLE

Snow/ica automatic

Operation status indicator

VKT

Current sensing

Terminal blocks

Siemens

4mm²

IP 55

Incl. sensor

A1

029

038

61

028

037

62 63

JR1

027

036

034 035

032 033

F1-F3

VärmeKabelTeknik

Control – Control cabinets 19 Schema Type 11-21-31-41 ic Roof

(The first digit in the combination indicates the number of three‐phase groups and the second digit the number of control units) Q1 L1 EBERLE EM 524 87

L2

B16 A16

B14 A14

B15 A15

B13 A13

A11

B11

B12 A12

B9

B4

B3

B1

B2

Pe

B10 A10

A8

A9

A7 B7

B8

A5

A6

B5

B6

A3

A2

A1

N

A4

L3

037

038

65

66

67

0=0 I=MAN

K1

2 L 1 K1 A2

66

67 Brun

65

Blå Givare Temperatur

64 Gul

Brun

62

63 Givare Is / Snö

Grön

61

Vit Vk.Grupp 1

Ink.Matning

Grå

4

2

1

3

4

1

3

N

2

ENCLOSURE SIZES T11 T21 T31 T41

Polystyrol Polystyrol Sheet steel Sheet steel

Denomination

376x312x143 501x312x143 700x500x250 800x600x300

Manufacture r Cabinet Legrand Main switch Siemens ELCB Siemens Circuit breaker Siemens Contactor Siemens Thermostat Calectro Operation status indicator VKT Terminal blocks Siemens

Type

Note IP 55

4x25A 4‐pol 25A 10/16/20/25A Typically type C 4 x 24A Snow/ice automatic Incl. sensor Current sensing 4mm²

A1

029

036

61

028

035

64

JR1

027

034

62 63

033

032

F1-F3

Control – Control cabinets 20

VärmeKabelTeknik

Telephone: +46‐301‐418 40 – Email: info@vkts.se – Homepage: www.vkts.se Industrihuset

Södra Hedensbyn 43

S‐430 64 HÄLLINGSJÖ

S‐931 91 SKELLEFTEÅ

Sweden

Sweden

Fax: +46‐301‐418 70

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