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ManualsBrandsSiemens ManualsHeating controllerDifferential Temperature Controller RLE127

337

Synco™ 100

Differential Temperature

Controller

RLE127

Differential temperature controller for solar storage systems. Compact design

with two 2-position control output AC 24…230 V.

Use

Plant types:

• Solar energy plants with storage tanks

• Swimming pool heating systems with solar panels

• Heat storage plants with several storage tanks

• Multiboiler plants

Building types:

• Residential buildings of all types

• Non-residential buildings of all types

Application example:

• Control of the temperature differential between 2 plant components or plant sections,

e.g. between heat source and heat consumer

Devices that can be controlled:

• 2-position actuators, e.g. thermal actuators

• 3-position actuators

• Circulating pumps, charging pumps, boilers

• On/off actuating devices

CE1N3337en

26.11.2009

Building Technologies

Summary of content (10 pages)

PAGE 1
3 337 Synco™ 100 Differential Temperature Controller RLE127 Differential temperature controller for solar storage systems. Compact design with two 2-position control output AC 24…230 V.
PAGE 2
Functions Main functions • Control of the adjusted temperature differential through 2-position control of one or several devices • Pre-configured application types selected by DIP switch • Changeover to a secondary heat source upon demand Other functions • • • • • • Minimum charging temperature option Absolute temperature setpoint Maximum temperature limitation Remote setpoint adjustment Test mode as a commissioning aid Frost protection Ordering When ordering, please give type reference: Description, s
PAGE 3
SD 2 3337D01 The heat consumer temperature (N1) is measured with the controller's integral sensing element. SD 2 ON OFF TOFF Δt K Δt W Δt ON Δt OFF SD Tw TON T [K] Differential temperature Differential temperature setpoint Switch-ON point Switch-OFF point Switching differential If the source temperature (B2) exceeds the consumer temperature (N1) by the setpoint (Δt ON), the controller closes its control contact Q1–Q3, thus switching the actuating device ON.
PAGE 4
• If the setting slider is in the Mid position (>5…<25 K), the output relay contacts (Q1–Q2; Q4–Q5) remain normally closed as the factory settings. • If the setting slider is moved to the High position (>25 K), contact Q1–Q3 will close • If the setting slider is moved to the Low position (<5 K), contact Q4–Q6 will close Mechanical design The controller is designed for mounting into piping or onto storage tanks. It consists of housing, cover and immersion rod.
PAGE 5
Mounting notes For mounting, a protection pocket is provided; the controller is inserted and snaps on. Suitable mounting locations for the controller or the temperature sensor depending on the application: • In the heat source: in the hottest part • In the heat consumer: in the coldest part • In solar panels: directly by the outlet Ensure that the local safety regulations are complied with. To mount the protection pocket, a threaded sleeve must be fitted into the pipe.
PAGE 6
Norms and standards General conformity according to EMC directives Low voltage directive Product standards Automatic electrical controls for household and similar use Electromagnetic compatibility Emissions Immunity Degree of protection Safety class Degree of contamination 89/336/EEC 73/23/EEC and 93/68/EEC EN 60 730-1 and EN 60 730-2-9 EN 50081-1 EN 50082-1 IP65 EN60 529 II to EN 60730 Normal Connection terminals for solid wires or stranded wires Sensor Sensing element Time constant (with protection po
PAGE 7
3337A02 L AC 230 V B L R1 M B2 M B B2 M M B3 N B3 M Q1 Q4 Q2 Q3 Q5 Q6 M1 N1 M2 N Differential temperature controller with a solar temperature sensor and a storage tank temperature sensor. Control of solar pump and boiler pump (e.g. application no. 2.) Note In this example, the input for control contact Q4 is fed from the normally closed contact Q2. This prevents both charging pumps from running simultaneously.
PAGE 8
T 3337S02 Application 2 Solar System with Additional Heat Producer B2 E2 E1 B3 M2 T E3 M1 N1 Differential temperature control of a storage tank with changeover to a separate heat producer (typically a boiler) when the solar energy is not sufficient. An additional sensor (B3) is added to the upper part of the storage tank to control charging pump M2 to maintain a fixed boiler temperature.
PAGE 9
Application 5 Solar System with 2 Collectors (East/West) T B2 T B3 E3 E2 M2 E1 N1 3337S05 M1 Differential temperature control of a storage tank by two independent solar collectors (e.g. east and west facing). This application is used in very sunny areas to maximize the solar energy throughout the day. Application 6 Solar System with layered Storage Tank (2 heat exchangers) T B2 E2 E1 B3 T Y1 M1 3337D06 N1 Differential temperature control of a layered storage tank.
PAGE 10
Dimensions 72.5 51 13.5 150.2 125 61 29 150 251.5 3334M01 G½A 9 13 Dimensions in mm Controller with protection pocket 10/10 Siemens Building Technologies 2004-2008-2009 Siemens Switzerland Ltd Subject to alteration Differential temperature controller RLE127 CE1N3337en 26.11.