Electrical Heaters EPR

LAING Electric heater-circulatorunit

...the wall mounted electric heat sourcefor hydronic space heating systems

universal inexpensive reliable

2 LAING Electric Heater www.laing.de

Electric heater-circulator unit

Contents

Electric heater-circulator unit - universal - inexpensive - reliable ......................................................... 3

LAING Electric heater-circulator unit - design ................................................................................... 4

LAING Electric heater-circulator unit - applications ............................................................................ 5

LAING Electric heater-circulator unit - available models ..................................................................... 6

- Electric heater-circulator unit model EPR ............................................................................. 7

- Electrically heated substation with manifolds model EPR SD/XD. ......................................... 8-13

- Electrically heated central substation model EPR Z .............................................................. 14-15

- Electric single room heater model EH 2 ................................................................................ 16

- Electric single room heater with cabinet model EH 2 S ......................................................... 17

Controls ............................................................................................................................................. 18

Accessories, components, spare parts .............................................................................................. 19

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3LAING Electric Heaterwww.laing.de


Electric- hydronic heating - universal - inexpensive - reliable

Benefits of the electric heating systemTo heat with electricity offers distinct advan-tages over other heating systems:- low purchase price,- low installation cost,- no cost for storing fuel,- no boiler compartment or storage rooms for

oil necessary,- no cost for procurement of fuel,- no chimney necessary, no cost for cleaning

the chimney,- low maintenance cost,- easy retrofit in existing apartments and

houses,- high efficiency also at partial load,- no exhaust gas or smell,- no potential danger by leaking gas or oil.

With the new energy efficient houses, the useof electric heating systems is a viable alternativeto conventional heating systems. The influenceof increased consumption of primary energy atthe power plant and higher cost of electricity isno longer a decisive factor. The greatly improvedinsulation of new buildings has drastically redu-ced the heat requirement. For an apartment with100 m2 a total heating capacity of 6 kW is oftensufficient. This means that during the heatingperiod an average heating capacity of little morethan 2 kW will be needed. This can be achievedeasier with an electric heat source rather thanwith today´s boilers, since their capacity is muchtoo high for these applications.

In addition, conventional heating systemshave losses due to the start of a burner or due topartial load in spring and autumn whereas elec-tric heaters use only energy when it is reallyneeded. Another important incentive for the Elec-tric heater-circulator unit can be given by thevery attractive electricity prices offered by someutility companies for electric heating.

The Electric warm water floor heatingIn contrast to conventional hydronic systemswhere there are always a boiler and radiators,electric floor heating offers two possibilities, thedirect heating and indirect heating with warmwater.

The electric direct heating uses heating wiresplaced into the slab which heat the floor surface.This method however has a distinctive disad-vantage:

Usually such heating wires produce heatindependent from the surrounding temperature.If for instance a part of the floor is very wellinsulated by a plastic foam sofa, a cabinet orboxes, such heating can result in dangerouslyhigh floor temperatures. Such overheating canonly be eliminated by integrating sensors whichdeactivate the heater partially when a set tempe-rature is exceeded.

With electric warm water heating, an electricboiler warms up water which is then circulatedthrough the floor heating system. The water canonly dissipate heat while the floor has not yetreached the water temperature. This systemtherefore has a self regulating effect. As soon asthe floor in an area of the room has reached acertain temperature the temperature differenceto the heat carrier becomes smaller so that inthis area less heat is transferred to the floor. Thisalso applies to areas of the floor which areexposed to direct sun. Since the floor in theseareas has a higher temperature already, lessheat from the heat carrier will be transferred dueto the smaller temperature difference. This is notpossible with direct electric floor heating, sincein this case each part of the floor receives thesame heat input.

A further advantage of the electric warmwater heating is the possibility to change theheat source. As soon as the favorable conditi-ons for electricity are no longer available, theelectric heater can be replaced by an oil or gasboiler. If this possibility is taken into accountwhen the floor heating is designed, the changecan be made with little expense.

For these reasons, the indirect electrical floorheating is always preferable to a direct electricalheating system.

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The Electric heater-circulator unit - the design

Cross-section through Electric heater-circulatorEPR with spherical motor

In the design of the Electric heater-circulator unit weused a completely new approach. As the name„Electric heater-circulator“ suggests, the sphericalmotor pump with its whisper quiet operation and theelectrical heater form an integral unit that guaran-tees the most compact and efficient heat source fora hydronic system.

The spherical motor pump conveys the waterthrough the rotor/impeller into the enlarged pumphousing which contains the heating elements thatheat up the water. The swirl created by the impellerimproves the heat transfer from the heating ele-ments.

The heated water exits the unit through thedischarge port situated at the upper part of thehousing. A safety valve and a bleed valve are placedat the highest point of the heater-circulator unit. Apressurized expansion tank is attached to a portnear the inlet port. A safety temperature cutout andan electronic control are placed in the terminal box.This control performs absolutely noiseless swit-ching of the electric heating elements, providesconstant temperature control, shuts the pump offwith a time delay, and offers reliable protectionagainst overheating.

All parts of the Electric heater-circulator thatcome into contact with the heat carrier fluid arecompletely corrosion resistant.

The LAING Spherical MotorThe circulator integrated into the Electric heater-circulator unit has a spherical motor developed byLAING. The spherical motor pumps have provenreliable in decades of successful service.

The only moving part is the rotor/impeller unitthat glides on a ceramic stationary ball suspendedby electromagnetic forces. The rotor/impeller unittilts automatically to allow small dirt particles toflow through. This bearing principle eliminates fro-zen shafts, leaky seals and noisy bearings.The pump therefore stays quiet over its lifetime.

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Electrically heated central substation for radiatorheating

The LAING Electric heater-circulator unit - applications

The LAING Electric heater-circulator units are theleast expensive heating solution. They are suited forsingle family houses as well as for apartments witheither floor heating or radiators. The LAING Electricheater-circulator units are also ideal for room additi-ons which cannot be integrated into the existingheating system or for vacation homes and weekendhomes. A further application is the heating of ba-throom floors in summer, which otherwise wouldrequire operation of the main heating system.

Due to its compactness and its extremely quietoperation the LAING Electric heater-circulator unit

can even be installed in apartments or hallways.Because of its flat design the unit fits inside wall-mounted cabinets so that no separate space isneeded. Room temperature controls as well as outsi-de temperature controls can easily be added to theintegrated noiseless electronic constant temperaturecontrol.

The installation of the LAING Electric heater-circulator requires only the electrical connection andthe connection to the floor heating system or theradiators which results in low material and labor costs.

Typical applications

Electrically heated substation with manifoldsfor floor heating

Electric single room heater

Application example: Heating of bathroom floors whenthe main heating system is turned off.

Electrically heated central substation for radiator heating,floor heating and domestic hot water heating

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LAING Electric heater-circulator units - Overview

Electrically heated substations with manifolds - Models EPR SDand EPR XDThese compact units reduce the installation time and expense to aminimum. The units contain all components necessary for electric floorheating or electric radiator heating. They consist of an Electric heater-circulator unit with integrated electronic control, a plastic manifold, aflowmeter for each loop, a pressurized expansion tank, compressionfittings and safety devices. All components are assembled and factorytested for leaks. The units can be delivered in a cabinet or on mountingbracket. All components coming in contact with the liquid are corrosionresistant.

Electrically heated central substation - Model EPR ZThe central unit combines an Electric heater-circulator unit with itselectronically actuated switch Model EPR, a pressurized expansion tank,connection fittings and safety fittings in an extremely compact package.

The central unit should be used when there is not enough space for thecompact unit or when the radiator heating only requires a single loop. Allcomponents coming in contact with the liquid are corrosion resistant andall units are factory tested for leaks.

Electric single room heater with cabinet - Model EH 2 SThe electric heater-circulator unit - Model EH 2 S is assembled into acabinet to be mounted inside a wall. This reduces the installation costsfor a separate single room electric heating to a minimum.

In addition to the electric heater-circulator unit EH, it contains anexpansion tank, a manifold for two loops, and valves for filling. The unit hasbeen factory tested for leaks.

Electric single room heater Model EH 2The Electric heater-circulator unit Model EH is a compact small electric boiler with a heatperformance of up to 2 kW. It is mainly intended for the heating of a single room. This heateris especially suitable for bathroom floor heating during the time of year when the centralheating system is shut off. It is also suited for the heating of room additions or rooms inattics.

The heater contains a heating element of 2000 W output, a quiet LAING sphericalmotor pump, a safety temperature limiter and a constant temperature control. Optionallya timer can be included to run the heating only at certain hours of the day. All componentscoming in contact with the liquid are corrosion resistant.

Electric heater-circulator unit - Model EPRThese LAING Electric heater-circulator units are compact electrically heated boilerswith an integrated circulator pump. Their performance ranges from 6 to 15 kW,sufficient for the space heating of a single family home or an apartment.

Due to their compactness and a depth of only 110 mm they can be mounted insidea wall or placed in a recess. All components are corrosion resistant so that they caneven be used in floor heating systems with plastic hoses which are not oxygen diffusionproof. The use of the LAING spherical motor pump guarantees quiet operation over itslifetime. The integrated electronic control enables noiseless switching of the electricheating elements. A safety temperature limiter protects against overheating.

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Electric heater-circulator unit - Model EPR

DescriptionThe Electric heater-circulator unit contains 3 heatingelements, a LAING spherical motor pump, a safetytemperature limiter, an integrated electronic control, asafety valve, a pressure gauge, and a thermometer. Allcomponents are combined into a compact unit.

The integrated electronic control has the followingfunctions:- Electronic, absolutely noiseless solid state relays

for each electric heating element.- Electronic fixed temperature control.- The three heating elements can be activated

either simultaneously, staged over time, stagedby temperature or by the temperature gradient.

- Overheating protection for the solid state relays.- Switch selectable delayed pump shutoff. If this

function is activated, the pump will run as long asthe heater is switched on and stay on for twoadditional minutes after the heating is turned off toremove the residual heat of the heating elements.

- Electronic dry fire protection of the heating ele-ments.

- Remote control input. The Electric heater-circula-tor unit can be activated by remote control. A roomthermostat or an outside temperature dependentcontrol can be connected to this input.

- The second and third heating element can becontrolled by an external source.

- Electronic pump run test. If for any reason thepump does not work, the heating elements will notbe activated.

- „Malfunction“ output. In case of any malfunction, acontact will be closed which can be connected toan external control system.

- Main switch. The main switch turns off the heateras well as the pump.

Models availableThe Electric heater-circulator units EPR are availablein four sizes:

Model Heating Item No. Dim. Dim.Capacity A B

EPR 6 3 x 2 kW 40 00 300 300 618EPR 9 3 x 3 kW 40 00 330 300 618EPR 12 3 x 4 kW 40 00 360 365 683EPR 15 3 x 5 kW 40 00 390 365 683

(The dimensions refer to the drawing dimensional)

Technical SpecificationsModel EPR EPR EPR EPR

6 9 12 15Electric heatingElectric heatingcapacity 2x2kW 3x3kW 3x4kW 3x5kWVoltage(3 phase) 230/400V 230/400V 230/400V 230/400VRated Current 8,7 A 13 A 17,4 A 21,7 A

Power supplyThe Electric heater-circulators can be connected tothe following outlets:3 phase/400V, 3 phase/230V, single phase/230V

PumpType spherical motor pumpVoltage 230V/50HzWatts input 99W

Safety temperature limiterMaximum temperature 110°C ± 9K

Pump Performance Curve

Dimensions

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Electrically heated substation with manifolds - Model EPR SD/XD

Customer requests for a unit that combines allcomponents necessary for electrical heating led tothe development of the electrically heated substati-on with manifolds. Installation of this unit requiresonly the mounting of the unit to the wall or into arecess and the connection of the pipes and electri-cal supply.

With a minimal depth of only 112 mm the LAINGsubstation can be placed inside almost any wall.Due to the adjustability of the cabinet the unit canbe adapted to practically all conditions of installati-on.

InstallationDue to the compactness and the quiet operation ofthe LAING substation it is possible to install the unitin the same place where normally the heating circuitmanifold is placed. This means that the pipingconnections and installation cost are reduced to aminimum.

The easiest solution is the use of the steelcabinet which contains all components and whichcan be easily built into a wall. The only visible partswill be the frame and the door, both of which aregalvanized and can be painted. This makes it pos-sible to adapt the visible parts of the substation tothe surrounding wall.

If the unit is to be mounted inside an existingcabinet or recess, the substation on mounting brak-kets can be used. In this case, the unit is attachedto the wall with the mounting brackets. If desired,the unit can be covered up after installation.

The components of the systemThe LAING Electrically heated substation with ma-nifolds contains the following components:

Pressurized Expansion tankAll expansion tanks used in the LAING units arecorrosion resistant.

The standard model of the substation is equip-ped with a 6 liter membrane expansion tank. Uponrequest, the unit can be equipped with an openstainless steel expansion tank.

Manifold with flowmeterAll LAING substations are supplied with plasticmanifolds. The manifolds are assembled from indi-vidual segments so that even after installation thenumber of loops can be increased or decreased. Themanifolds are equipped with a flowmeter for eachloop. This makes it easy to adjust the individualloops without having to consider the valve characte-ristics.

The viewing glass of the flowmeter is filled with wateronly at startup. Since the fluid exchange thereafteris restricted, the glass remains transparent evenafter prolonged use.Due to the double walled design of the manifolds the

heat transfer to the cabinet is minimized. All LAINGsubstations are delivered complete with compressi-on fittings. The required size of the fittings needs tobe indicated on the order.

Filling valveTo facilitate the filling, the substation has a checkvalve built into the feed side. During the filling thisvalve is closed so that the water flows through theloops and not through the heater-circulator unit. Thecheck valve replaces manual shut-off valves foundon conventional manifolds.

CabinetThe cabinet of the substation for installation insidea wall is made of solid steel. The frame consists ofhot galvanized sheet metal, the walls of the cabinetand the door are made from galvanized sheet metal.The depth of the cabinet can be adjusted from 112to 177 mm, its height from 1000 to 1070 mm.Depending on the number of loops, the width of thecabinet is either 1000 or 1330 mm. The mountingrails allow for horizontal and vertical adjustment ofthe substation inside the cabinet. Cabinets forinstallation on the wall are available upon request.

Mounting bracketsThe mounting bracket for substations without cabi-net consist of a solid structure of metal rails. Therails will be attached to the wall. The substationthen can be adjusted by sliding it on the rails. Fortransportation, the rails are mounted on a woodenboard which has to be removed before installation.

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Design of the LAING electrically heated substation

Flow meter for each loopfor balancing of the hea-ting circuits.

Adjustable steel cabinet forinstallation inside a wall, oran alternative mounting brak-ket.

Check valve to facilitate thefilling and purging of the pipeloops (check valve is closedduring the filling and opensautomatically thereafter). Corrosion resistant pressu-

rized expansion tank.

Electric heater-circulator unitEPR with whisper-quietLAING spherical motorpump, integrated electroniccontrol, safety temperaturelimiter, pressure relief valve,pressure gauge, and ther-mometer.

Fittings for filling and drai-ning with air purgers

Plastic manifold in seg-ments with compressionfittings.

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Substation with Electric heater-circulator unit EPR 6, EPR 9, EPR 12 or EPR 15include plastic manifolds in segments for 2 to 12 loops, flow meter for each loop,check valve, filling and draining fittings, fully assembled in a galvanized steelcabinet for installation inside a wall, factory tested for leaks. The height of thecabinets is adjustable from 1000 to 1070 mm (above finished floor). The depth isadjustable from 112 to 177 mm.The dimensions are in mm and refer to the drawing on page 12.

Model Item nr. Model Item nr. Loops Dimen- Dimen- Dimen- Dimen-sion A sion B sion C sion D

EPR 6, 6 kW (3x2 kW) EPR 9, 9 kW (3x3 kW)EPR 6 SD 02 53 00 002 EPR 9 SD 02 53 00 052 2 1000 362 440 300

EPR 6 SD 03 53 00 003 EPR 9 SD 03 53 00 053 3 1000 417 440 300

EPR 6 SD 04 53 00 004 EPR 9 SD 04 53 00 054 4 1000 472 440 300

EPR 6 SD 05 53 00 005 EPR 9 SD 05 53 00 055 5 1000 527 440 300

EPR 6 SD 06 53 00 006 EPR 9 SD 06 53 00 056 6 1000 582 440 300

EPR 6 SD 07 53 00 007 EPR 9 SD 07 53 00 057 7 1000 637 440 300

EPR 6 SD 08 53 00 008 EPR 9 SD 08 53 00 058 8 1000 692 440 300

EPR 6 SD 09 53 00 009 EPR 9 SD 09 53 00 059 9 1330 747 440 300

EPR 6 SD 10 53 00 010 EPR 9 SD 10 53 00 060 10 1330 802 440 300

EPR 6 SD 11 53 00 011 EPR 9 SD 11 53 00 061 11 1330 857 440 300

EPR 6 SD 12 53 00 012 EPR 9 SD 12 53 00 062 12 1330 912 440 300

EPR 12, 12 kW (3x4 kW) EPR 15, 15 kW (3x5 kW)EPR 12 SD 02 53 00 102 EPR 15 SD 02 53 00 152 2 1000 362 505 365

EPR 12 SD 03 53 00 103 EPR 15 SD 03 53 00 153 3 1000 417 505 365

EPR 12 SD 04 53 00 104 EPR 15 SD 04 53 00 154 4 1000 472 505 365

EPR 12 SD 05 53 00 105 EPR 15 SD 05 53 00 155 5 1000 527 505 365

EPR 12 SD 06 53 00 106 EPR 15 SD 06 53 00 156 6 1000 582 505 365

EPR 12 SD 07 53 00 107 EPR 15 SD 07 53 00 157 7 1000 637 505 365

EPR 12 SD 08 53 00 108 EPR 15 SD 08 53 00 158 8 1000 692 505 365

EPR 12 SD 09 53 00 109 EPR 15 SD 09 53 00 159 9 1330 747 505 365

EPR 12 SD 10 53 00 110 EPR 15 SD 10 53 00 160 10 1330 802 505 365

EPR 12 SD 11 53 00 111 EPR 15 SD 11 53 00 161 11 1330 857 505 365

EPR 12 SD 12 53 00 112 EPR 15 SD 12 53 00 162 12 1330 912 505 365

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Available Models and dimensions of LAING Electrically heated Substations withmanifold on mounting brackets

Substation with Electric heater-circulator unit EPR 6, EPR 9, EPR 12 or EPR 15 includeplastic manifolds in segments for 2 to 12 loops, flow meter for each loop, check valve,filling and draining fittings, fully assembled on mounting brackets, factory tested forleaks. The unit extends approx. 1000 mm (above finished floor).

The dimensions are in mm and refer to the drawing on page 12. (Dimension Arefers to the width of the wooden board on which the unit is mounted for transporta-tion).

Model Item nr. Model Item nr. Loops Dimen- Dimen- Dimen- Dimen-sion A sion B sion C sion D

EPR 6, 6 kW (3x2 kW) EPR 9, 9 kW (3x3 kW)EPR 6 XD 02 53 00 502 EPR 9 XD 02 53 00 552 2 980 362 440 300

EPR 6 XD 03 53 00 503 EPR 9 XD 03 53 00 553 3 980 417 440 300

EPR 6 XD 04 53 00 504 EPR 9 XD 04 53 00 554 4 980 472 440 300

EPR 6 XD 05 53 00 505 EPR 9 XD 05 53 00 555 5 980 527 440 300

EPR 6 XD 06 53 00 506 EPR 9 XD 06 53 00 556 6 980 582 440 300

EPR 6 XD 07 53 00 507 EPR 9 XD 07 53 00 557 7 980 637 440 300

EPR 6 XD 08 53 00 508 EPR 9 XD 08 53 00 558 8 980 692 440 300

EPR 6 XD 09 53 00 509 EPR 9 XD 09 53 00 559 9 980 747 440 300

EPR 6 XD 10 53 00 510 EPR 9 XD 10 53 00 560 10 980 802 440 300

EPR 6 XD 11 53 00 511 EPR 9 XD 11 53 00 561 11 1350 857 440 300

EPR 6 XD 12 53 00 512 EPR 9 XD 12 53 00 562 12 1350 912 440 300

EPR 12, 12 kW (3x4 kW) EPR 15, 15 kW (3x5 kW)EPR 12 XD 02 53 00 502 EPR 15 XD 02 53 00 552 2 980 362 505 365

EPR 12 XD 03 53 00 503 EPR 15 XD 03 53 00 553 3 980 417 505 365

EPR 12 XD 04 53 00 504 EPR 15 XD 04 53 00 554 4 980 472 505 365

EPR 12 XD 05 53 00 505 EPR 15 XD 05 53 00 555 5 980 527 505 365

EPR 12 XD 06 53 00 506 EPR 15 XD 06 53 00 556 6 980 582 505 365

EPR 12 XD 07 53 00 507 EPR 15 XD 07 53 00 557 7 980 637 505 365

EPR 12 XD 08 53 00 508 EPR 15 XD 08 53 00 558 8 980 692 505 365

EPR 12 XD 09 53 00 509 EPR 15 XD 09 53 00 559 9 980 747 505 365

EPR 12 XD 10 53 00 510 EPR 15 XD 10 53 00 560 10 980 802 505 365

EPR 12 XD 11 53 00 511 EPR 15 XD 11 53 00 561 11 1350 857 505 365

EPR 12 XD 12 53 00 512 EPR 15 XD 12 53 00 562 12 1350 912 505 365

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Substation with cabinetEPR 6 SD.., EPR 9 SD.., EPR 12 SD.., EPR 15 SD..

Dimensional drawing of the LAING Electrically heated substation

Substation with mounting bracketsEPR 6 XD.., EPR 9XD.., EPR 12 XD.., EPR 15 XD..

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The pressure drop diagram for one loop shows the number of turns necessary on the flow adjusterto obtain the desired resistance curve

Manifold Design and Valve Characteristics

Integrated flow meter for arange of 1 to 4 l/min. withflow adjuster

Valve for manual shutoffintegrated in the manifold

Glass fiber reinforced pla-stic, corrosion resistantand resistant to aging, tem-perature resistant up to135°C

Integrated universal adapterfor Copper, Plastic and softsteel Tube from 10 to 21,5mm diameter.

Compression fitting withO-ring

Double walled manifold withair pocket for insulation

Example:Pump head/pressure drop: 0.1 bar (10 kPa)Desired flow: 150 l/hSetting: 4.5 turns to the right(start at fully opened position of the flow adjuster)

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Electrically heated central substation - Model EPR Z

Design of the LAING Electrically heated central substation

The use of the central substation is preferable whene-ver there is not enough room for a substation withmanifolds or when the radiator heating is done in asingle loop.

The central substation can be installed in the utility roomor, because of its whisper-quiet operation, even in theliving quarters. Due to its compact size the centralsubstation can be placed in a small recess.

Approx. 60 mm di-stance between thewall and the Electricheater-circulator unitfor thermal insulation.

Pressure relief valve,air purger, pressuregauge and thermome-ter

Electronic Micropro-cessor control withconstant temperaturecontrol and safetyfunctions

Plumbing connec-tions of the Electricheater-circulator unitwith union fittings andball valves

Corrosion resistantpressurized expansi-on tank

Whisper-quiet LAINGspherical motor pump

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Available Models and dimensions of LAING Electrically heated Central Substations

Central Substation with Electric heater-circulator unitEPR 6, EPR 9, EPR 12 or EPR 15 include corrosionresistant pressurized expansion tank (6 l), pressure

gauge, safety relief valve, thermometer, shut-off val-ves, fully assembled and factory tested for leaks.

Model Item No. Dimension A Dimension B

EPR 6 Z 51 00 300 300 618

EPR 9 Z 51 00 330 300 618

EPR 12 Z 51 00 360 365 683

EPR 15 Z 51 00 390 365 683

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Electric single room heater - Model EH 2

Wiring Diagram of EH 2 KR

DescriptionThe electric heater Model EH 2 consists of an electri-cal heater, a LAING spherical motor pump and anelectric control. The whisper-quiet spherical motorpump draws water from the return side and pumps thewater past the electric heating elements to the feedside.

The Electric heater-circulator unit contains a safe-ty temperature limiter as well as an integrated con-stant temperature thermostat. Optionally an integra-ted timer with daily or weekly programming is available.

All parts of the Electric heater-circulator unit co-ming into contact with the liquid are corrosion resi-stant so that the unit can be used for domestic hotwater as well as in heating loops.

ApplicationsDue to its compact design (depth only 80 mm), itsquiet operation and the integrated controls, the Elec-tric heater-circulator unit EH 2 can be used for singleroom heating without any problems.

Dimensional drawing of EH 2Technical Specifications

Pump LAING spherical motor pumpmodel A1-150, 230V, 25W

Connection R 1/2" female thread

Heating Capacity 1 heating element of 2000 W

Controls Safety temperature limiter(95°C), constant temperaturethermostat with a range of 20°Cto 70°C, timer with daily orweekly program to control theheating times.

Pump Performance Curve

Available Models

EH 2 KR Item No. 40 00 110Electric heater with circulator,safety temperature limiter andconstant temperature thermostat.

EH 2 KRU Item No. 40 00 120Electric heater with circulator,safety temperature limiter, con-stant temperature thermostat andtimer with daily program.

EH 2 KRUW Item No. 40 00 130Electric heater with circulator,safety temperature limi-ter,constant temperature thermo-stat and timer with weekly pro-gram.

Pum

p

Temperature controller

Temperature

setting

T water

Heating element

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Electric single room heater with cabinet - Model EH 2 S

S a f e t ytempera-ture limiterwith con-stant tem-peraturecontrol

Filling anddraining fittings

Manifold fortwo loops

Galvanizedsteel cabinet


DescriptionThe electric single room heater with cabinet EH 2 Sconsists of an Electric heater-circulator unit EH 2 withan electric heating capacity of 2 kW, feed and returnline manifolds for two loops, filling and draining fittingsand a pressureless expansion tank with fill heightindicator. All components are assembled in a galvani-zed steel cabinet for mounting inside a wall.

The pressureless expansion tank ensures optimalair purging for the whole system and renders thesafety valve and pressure gauge unnecessary.

The completely assembled unit reduces the instal-lation expense to a minimum. The unit can be placedinside a recess and requires only the electrical andpipe connections.

ApplicationsThe single room heater with cabinet EH 2 S isapplicable wherever heating independent from a cen-tral heating system is required. Such applicationsneed a separate expansion tank.

Due to its compact design the unit can be placedalmost anywhere without a problem. Attention mustbe paid to the fact that the unit has to be placed abovethe heating loops due to the pressureless expansiontank. It is even possible to place the unit inside an 110mm thick wall.

Due to the whisper-quiet operation of the sphericalmotor pump, the unit can be installed inside rooms.The integrated control elements allow the room tem-perature to be controlled with just an additional roomthermostat such as our RT or RTU.

Technical Data

Electric singleroom heater EH 2 KR/KRU/KRWUManifold Brass manifold 3/4", 2 portsExpansion tank Pressureless with integra-

ted air purger, volume approx. 2 lCabinet Galvanized steel cabinet,

Height: From 680 to 740 mmWidth: 600 mmDepth: From 115 to 170 mm.

Available ModelsEH 2 KRS Item No. 52 00 110

Electric heater with circulator EH2 KR, with constant temperaturecontrol, pressureless expansiontank and cabinet.

EH 2 KRUS Item No. 52 00 120Electric heater with circulator EH2 KRU, with constant tempera-ture control, pressureless expan-sion tank, cabinet and timer withdaily program to run the unit onlyduring preset hours of the day.

EH 2 KRUWS Item No. 52 00 130Electric heater with circulator EH2 KRU, with constant tempera-ture control, pressureless expan-sion tank, cabinet and timer withweekly program to run the unitonly during preset hours of theweek.

Pressureless expansion tankwith fill height indicator.

Schematic Drawing

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Aside from the constant temperature controls integrated in the LAING Electric heater-circulator units, thereis a large number of controls available for every need. The components are carefully matched.

Controls for LAING Electric heater-circulator units

Description Model Item No. EPR EH 2Temperature control depending on outside temperaturewith analog clock and optional room AR 1000 a 95 00 415temperature sensorRoom temperature controlsRoom thermostat RTS 95 00 403Room thermostat with timer RTU 95 00 404Constant temperature controlIncluded as standard in EPRand EH 2Spare partsReplacement safety temperature limiter STBR 55 00 921Main printed circuit board for EPR EPRT 55 00 925Processor printed circuit board for EPR EPRH 55 00 927ComponentsAnalog control unit AR 1000 Ra 95 00 425Outdoor temperature sensor AFa 95 00 426Feed temperature sensor VFa 95 00 427Room thermostat RTZ 95 00 450Room thermostat with timer RTU 95 00 404Thermoelectric actuator for 230 V TEA 95 00 402Terminal box KK 95 00 409Zone connection module ZM12 95 00 432Pump shutdown module ZRP 95 00 433Thermolelectrive drive TEA 95 00 402Room thermostat with nighttime setback RTR 95 00 451

Suitable for

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Accessories and replacement parts for Laing Electric heater-circulator units

A1-150 95 00 285 Z 1A1-150 U 95 00 286 Z 1A1-150 W 95 00 287 Z 1LF 404 95 00 099 Z 1

LF 400 95 00 101 Z 1

A5-400 95 00 093 Z 1A6-600 95 00 092 Z 1VSVA 95 00 113 Z 1VSRA 95 00 115 Z 1D180 95 00 212 Z 1

D250 95 00 213 Z 1

HDG 95 00 177 Z 1

DXG 95 00 175 Z 1

AEB 1" 95 00 265 Z 1KVER K 95 00 129 Z 1

KVER K 95 00 127 Z 1KVER K 95 00 133 Z 1KVER K 95 00 135 Z 1KVER K 95 00 137 Z 1KVER K 95 00 139 Z 1KVER S 95 00 153 Z 1KVER M 95 00 128 Z 1TH14 95 00 215 Z 1DG6 95 00 205 Z 2

SV 2,5 95 00 208 Z 1MA 2,5 95 00 209 Z 1DGS6 95 00 220 Z 2

STBR 55 00 921 Z 1EPRT 55 00 925 Z 1EPRH 55 00 927 Z 1EPRWH 55 00 928 Z 1THMA 95 00 216 Z 1BWAS 15 95 00 007 Z 2

MUV 15 95 00 508 Z 1

Flush-mounting cabinet (galvanised sheet metal) for...Schrank A 95 00 250 Z 3Schrank B 95 00 251 Z 3Schrank C 95 00 252 Z 2

Model Part number Description Product Freightcategory category

Replacement pump EH 2 KRReplacement pump EH 2 KRUReplacement pump EH 2 KRUWReplacement pump for EP and EPR 6000/9000/12000/15000 (without switch / internal capacitor)Replacement pump for EP and EPR 6000/9000/12000/15000 (without switch/external capacitor)Standard Replacement pump for EPR 6/9/12/15, 99 WReplacement pump for EPR 6/9/12/15, 130 WManifold segment feed with valve for floor heatingManifold segment return with flow meter for floor heatingFlow meter insert for VSRA,green, measurement range 30-177 l/hFlow meter insert for VSRA,red, measurement range 60-250 l/hConnection set for EPR (2 ball valves 1" female thread withunion connection with flat gasket)Duplex connector, feed and return manifold with 2 loops forFH 2, without compression fitting Model KV (K/S/M)1" Connector for the right end of manifoldCompression fitting for plastic tubing10,5 x 1,25mm (Polytherm)Compression fitting for plastic tubing 14 x 2mmCompression fitting for plastic tubing 16 x 2mmCompression fitting for plastic tubing 17 x 2mmCompression fitting for plastic tubing 18 x 2mmCompression fitting for plastic tubing 20 x 2mmCompression fitting for copper-/steel tubing ø 15mmCompr. fitting for meatll-/plastic tubing 16 x 2mmThermometerPressurized expansion tank(6 l, corrosion resistant, static pressure 0,75 bar)Safety valve R 1/2", 2,5 barPress. gauge 2,5 bar, R 1/4", connect. bottom-upKit with expansion tank, safety valve, pressure gauge, automaticair purger and accessoriesReplacement for EPR safety temperature limiterTriac-assemly EPRMain PC board for EPR and EPR ZMain PC board for EPR WCombination Thermometer/pressure gauge for EPRWConnection set (DN 15) for storage tank heaterconsisting of overriding control LAM 2 R, storage tank sensorTF3 and motorized three way valve MUV 15Motorized three way valve DN 15 (230 V/50 Hz)m

EPR - W 1000 x H 1000 x D 110-170 mmEPR - W 1330 x H 1000 x D 110-170 mmEH 2 B with adjustable door for wall and tilesW 345 x H 800-870 x D 115-175 mm

http://www.laing.de

2603

2004

About usSince the 1950s we at Laing have worked in the areas of research, development and production of pumps andheating products. More than 1000 patents worldwide resulted from this work. The original R&D institutelocated in Southern Germany has over the years evolved into an international company with additional locationsin the US, Japan and Hungary and with more than 400 employees. Today, our program consists of:

Pumps (Shaftless spherical motor pumps) Heating controls Floor heating system connection Electrical heaters Special products

We are a flexible and competent partner in the area of pumping and heating.We invite you to try our high quality, economic products.

Laing GmbH Systeme für Wärmetechnik · Klingelbrunnenweg 4 · 71686 Remseck - GermanyPhone: +49(0)7146/93 - 0 · Fax: +49(0)7146/93 - 33 · E-Mail: [email protected] · Internet: www.laing.de

http://www.laing.de

Electrical Heaters EPR

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