Siemens RLE132 Manual - User Manual

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CE1N3334en
2015-03-06

Building Technologies

HVAC Products

334

Synco™ 100

Immersion Temperature

Controller

RLE132

with 3-position output

Immersion temperature controller for basic heating plants. Compact design with

3-position control. Used as a controller, minimum or maximum limiter.

Use

Plant types:

•

Heating zones in heating plants

•

Heating section of ventilation or air conditioning plants

•

Flow temperature in heating plants

•

DHW temperature

•

Heat exchanger control

•

Calorifier control

Building types:

•

Residential buildings of all types

•

Non-residential buildings of all types

Used as a limiter:

•

Heating plants controlled by a heating controller with 3-position control, e.g. RVL4…,

RVP3…, RVP2…

Devices that can be controlled:

•

Actuators with 3-position control

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Immersion temperature controller RLE132

CE1N3334en

Building Technologies

2015-03-06

Functions

•

Control of the water temperature through 3-position control of a seat or slipper valve

•

Minimum or maximum limitation of the flow or return temperature, or minimum

limitation of the boiler return temperature

•

Outside temperature compensation

•

Remote setpoint adjustment

•

Setpoint changeover via external contact, can be selected to provide temperature

setback or legionella function

•

Frost protection

•

Load-dependent switching contact (e.g. for pump release)

•

Test mode as a commissioning aid

Ordering

When ordering, please give type reference

RLE132

Equipment combinations

Actuators must meet the following specification:

•

3-position control

•

Control contacts suited for AC 24…230 V, 2 A

•

Running times:

−

≥30 s (30 s or 35 s)

−

≥120 s (120 s, 125 s, 135 s, 150 s or 160 s)

For auxiliary functions, the following products can be used:

Type of unit

Type ref.

Data Sheet

Outside sensor (for outside temperature compensation)

QAC22

N1811

Remote setpoint adjuster

BSG21.1

N1991

Scale 0…130 °C for remote setpoint adjuster

BSG-Z

N1991

As a limiter, the RLE132 can be used in connection with the following types of heating
controllers:

Type reference

Data Sheet

RVL470

N2522

RVL471

N2524

RVL472

N2526

RVP201, RVP211

N2464

RVP300

N2474

RVP310

N2475

RVP320

N2476

RVP330

N2477

RVP331

N2478

Technical design

When the water temperature deviates from the setpoint, the controller adjusts the
actuating device until the setpoint is reached again. The neutral zone is ±2 K. The
controller calculates and stores the running time of the connected actuator. Fully open
(100 %) corresponds to a heat demand of 100 % (also refer to section “Switching
contact”).
The controller provides 2 modes of operation (for details refer to section “Operating
modes“):

•

Control with ECO

Main functions

Other functions

Mode of operation

as a controller

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Siemens

Immersion temperature controller RLE132

CE1N3334en

Building Technologies

2015-03-06

•

Control with boost

The following settings are required:

•

Setpoint

•

Control mode: A choice of 4 PI modes are available to suit the type of controlled

system (refer to chapter “Mechanical design”)

•

P-band

The control signals of the heating zone controller (RVL4…, RVP3…, RVP2…) are
passed to the RLE132 which acts as a limiter.

1. If the temperature (e.g. the boiler return temperature) falls to a level 4 K above the

minimum limit value, the RLE132 interrupts the OPEN signals of the heating zone
controller. At the same time, it delivers CLOSE commands in the form of pulses to
the mixing valve’s actuator until the temperature rises again.

2. If the temperature falls to the minimum limit value, the RLE132 delivers a constant

CLOSE command to the mixing valve’s actuator until the temperature rises again.

3. If the temperature rises, the RLE132 releases the positioning commands of the

heating zone controller.

1. If the temperature (e.g. the flow temperature) rises to a level 4 K below the

maximum limit value, the RLE132 interrupts the OPEN signals of the heating zone
controller. At the same time, it delivers CLOSE commands to the mixing valve’s
actuator in the form of pulses until the temperature falls again.

2. If the temperature reaches the maximum limit value, the RLE132 delivers a

constant CLOSE command to the mixing valve’s actuator until the temperature falls
again.

3. If the temperature falls, the RLE132 releases the positioning commands of the

heating zone controller.

When using an outside sensor, the RLE132 provides outside temperature
compensation. If the outside temperature falls from +15 to –5 °C, the setpoint will be
continuously raised by 0 K to 26 K. Below an outside temperature of –5 °C, the
temperature increase will be kept constant.

Outside temperature

Current setpoint

Nominal setpoint

Where the controller is mounted in an inaccessible location, a remote setpoint adjuster
BSG21.1 can be connected to the RLE132 (terminals R1–M), thus enabling the
setpoint to be adjusted from a remote location. In this case, the controller’s setpoint
setting slider must be set to EXT.

In operating mode

Control with ECO

, the nominal setpoint is

reduced

by closing an

external potential-free contact across terminals D1–M.
This ensures energy savings, e.g. through night setback of space heating controlled by
a time switch.

In operating mode

Control with boost

, the nominal setpoint is

raised

by closing an

external potential-free contact across terminals D1–M.

Mode of operation

as a limiter

Minimum limitation

Maximum limitation

Outside

temperature

compensation

Remote adjustment

of setpoint

Operating modes

Control with ECO
(setpoint decrease)

Control with boost
(setpoint increase)

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Siemens

Immersion temperature controller RLE132

CE1N3334en

Building Technologies

2015-03-06

This makes possible legionella protection in DHW heating systems. With the help of a
7-day time switch, the DHW is periodically heated up to the required temperature.

A slider is provided to set the temperature by which the nominal setpoint shall be
lowered (ECO) or raised (boost). The setting cannot be accessed by the user.

The switching output (terminals Q13–Q14) enables a plant element to be switched
depending on demand, or a limitation alarm to be generated. The mode of operation
depends on the operating mode selected on the RLE132:

•

When used as a

controller

The switching contact makes when there is a heat demand of 5 %. The contact
breaks, when there is no demand (0 %) for a period of 12 minutes.

•

When used as a

limiter

The contact makes when the limitation value is reached, and breaks when normal
operation is resumed.

In test mode, the control is switched off. The setpoint setting knob acts as a positioning unit:

•

If a setting >104 °C is used, the actuating device will open (OPEN command on Y1)

•

If a setting <26 °C is used, the actuating device will close (CLOSE command on Y2)

The test mode is indicated by an LED.

Mechanical design

The controller is designed for mounting into piping. It consists of a housing and cover
and an immersion rod. The rod contains the sensing element (LG-Ni 1000).
The housing is made of plastic and accommodates the controller electronics and all
operating elements, which are accessible only after removing the cover. The front
carries the setpoint setting slider and an LED for indicating operation:

•

LED lit: normal operation

•

LED flashes: test mode

LED

Block of DIP-switches

Setting slider for the setpoint increase or

decrease

Setting potentiometer for the P-band

All functions are selected via the DIP switch block which comprises 6 switches:

Function

1 2 3 4 5 6 Action

Operating

Heating with boost; setpoint increase

Maximum limitation

Minimum limitation

Heating with ECO; setpoint decrease

Integral action time

VERY SLOW, T

= 300 s

SLOW, T

= 180 s

FAST, T

= 60 s

MEDIUM, T

= 120 s

Test mode

Normal operation

Running time of
actuator

>30 s

>120 s

Setting

Switching contact

Test mode

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Siemens

Immersion temperature controller RLE132

CE1N3334en

Building Technologies

2015-03-06

For mounting, a protection pocket is provided; the controller is inserted and snaps on.

Engineering notes

The controller is supplied complete with Mounting and Installation Instructions.

Mounting notes

Ensure that the local safety regulations are complied with.

Suitable mounting locations are the following, depending on the application:

•

Flow temperature control:

−

In the heating flow; immediately after the pump if the pump is mounted in the flow

−

In the heating flow; approximately 1.5 to 2 m after the mixing point if the pump is
mounted in the return

•

Minimum limitation of the boiler return temperature and maximum limitation of the

flow temperature:
1.5 to 2 m after the mixing point

•

DHW temperature control:

1.5 to 2 m after the mixing point

•

Heat exchanger control:

As close as possible to the heat exchanger while observing the maximum
permissible ambient temperature

To mount the protection pocket, a threaded sleeve must be fitted into the pipe. The

immersion rod should face the direction of flow. The maximum permissible ambient

temperature must be observed.

Warning!

No internal line protection for supply lines to external consumers.

Risk of fire and injury due to short-circuits!

•

Adapt the line diameters as per local regulations to the rated value of the installed

overcurrent protection device.

•

The AC 230 V mains supply line must have an external circuit breaker with a rated

current of no more than 10 A.

Commissioning notes

To check the control wiring, the controller can be switched into test mode so that the

response of the actuating device can be checked.

In case of instability of the control loop, the P-band is to be increased, and/or the

integral action time selection. If the response of the system is too slow, these values

are to be reduced.

Disposal

The devices are considered electronics devices for disposal in terms of European
Directive 2012/19/EU and may not be disposed of as domestic waste.

•

Dispose of the device via the channels provided for this purpose.

•

Comply with all local and currently applicable laws and regulations.

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Siemens

Immersion temperature controller RLE132

CE1N3334en

Building Technologies

2015-03-06

Technical data

Operating voltage

AC 230 V +10% / –15%

Frequency

50 / 60 Hz

Power consumption

max. 4 VA

No internal fuse.

External preliminary protection with max. C 10 A circuit breaker in the supply line
required under all circumstances.

Setting range nominal setpoint

0…130 °C

Setting range setpoint changeover

0…50 K

P-band

1…50 K

Integral action time with PI control

selectable (60 / 120 / 180 / 300 s)

Control outputs Y1, Y2

Voltage
Current

AC 24…230 V
max. 2 A

Control outputs Q13–Q14

Voltage
Current

AC 24…230 V
max. 2 A

Max. cable length copper cable 1.5 mm

For signal input B9

For switching input D1

80 m
80 m

Contact sensing (input D1–M)

DC 6…15 V, 3…6 mA

Operation

Climatic conditions
Temperature
Humidity

to IEC 60721-3-3, class 3K5
0…

50 °C

95 % r.h.

Transport

Climatic conditions

Temperature

Humidity

to IEC 60721-3-2, class 2K3

−

25…+70 °C

<95 % r.h.

Mechanical conditions

class 2M2

EU Conformity (CE)

CE1T3330xx *)

Degree of protection

IP65 EN 60529

Safety class

II to EN 60730

Degree of contamination

normal

The product environmental declaration CE1E3333en *) contains data on
environmentally compatible product design and assessments (RoHS compliance,
materials composition, packaging, environmental benefit, disposal).
Connection terminals for solid wires or

stranded wires

2 × 1.5 mm

or 1 × 2.5 mm

Sensor

Sensing element
Time constant (with protection pocket)

LG-Ni 1000

Ω

at 0 °C

25 s

Protection pocket

Immersion depth
Perm. nominal pressure
Made of

150 mm
PN10
brass (Ms63)

Weight

0.3 kg

*) The documents can be downloaded from http://siemens.com/bt/download.

Power Supply

Functional Data

Environmental

conditions

Norms and standards

Environmental
compatibility

General

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Immersion temperature controller RLE132

CE1N3334en

Building Technologies

2015-03-06

Connection terminals

R1 M

D1 M

Q13

Q14

B9 Outside sensor

D1 Input for setpoint changeover

Input for Y1

Input for Y2

L, N Operating voltage AC 230 V

Ground

R1 Input for remote setpoint adjuster

Q13 Switching contact

Q14

Y1 Control output for mixing valve OPEN

Y2 Control output for mixing valve CLOSED

Connection diagram

B1 M

Q13

Q14

Used as a controller, flow temperature with outside temperature compensation, remote
setting unit, setpoint changeover and demand control of a pump

Used as a limiter in connection with a heating zone controller (RVL4…, RVP3…,
RVP2…), e.g. minimum limitation of the boiler return temperature or maximum limitation
of the boiler flow temperature

Outside sensor QAC22

External contact (e.g. time switch)

M1 Pump

N1 Immersion temperature controller RLE132

N2 Immersion temperature controller RLE132 as a limiter

N3 Heating controller RVL4…, RVP3…, RVP2…

R1 Remote setpoint adjuster BSG21.1

Actuator of heating circuit valve

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Siemens

Immersion temperature controller RLE132

CE1N3334en

Building Technologies

2015-03-06

Application examples

DHW temperature control

Flow temperature control in a
heating zone with a common
flow

Control of a heating zone with
zone controller RV…, minimum
limitation of the boiler return
temperature with RLE132

Heat exchanger control with 2-
port valve in the primary flow

Control of a heating zone with
zone controller RV…, maximum
limitation of the flow
temperature with RLE132

Control of the boiler return
temperature

Safety limit thermostat

N1 Immersion temperature controller RLE132 as a controller

N2 Immersion temperature controller RLE132 as a limiter

N3 Heating zone controller RVL4…, RVP3…, RVP2…

Heating circuit mixing valve or primary circuit valve or DHW mixing valve

Mixing valve, boiler return circuit

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Siemens

Immersion temperature controller RLE132

CE1N3334en

Building Technologies

2015-03-06

Dimensions

Controller with protection pocket

Dimensions in mm

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Siemens

Immersion temperature controller RLE132

CE1N3334en

Building Technologies

2015-03-06

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