Assortment / System Description

Immersion temperature controllers

Differential temperature controllers RLE127 and RLE127.QAZ

RLE127 differential temperature controller with immersion sensor (immersion

length 150 mm). RLE127.QAZ complete with collector sensor QAP21.1.

Calculation of the temperature differential also requires an LG-Ni1000 temperature

sensor. 2 relay outputs to control thermal actuators or circulating and charging

pumps (for switching AC 24…230 V, max. 2 A).

• Control of temperature differential between heat source and heat consumer

• Demand-dependent changeover to a second heat source

• Maintenance of a minimum charging temperature

• Consideration can be given to an absolute temperature

• Frost protection, remote setpoint adjustment

• Solar plants with storage tanks

• Swimming pool heating with solar collectors

• Heat storage plants with 2 storage tanks

• Heat generation plants with 1 boiler

Solar plant with heat exchanger and storage tank

Differential temperature control of collector and storage tank. Temperature sensor

B3 acquires the temperature in the heat exchanger. The storage tank is charged

only when the heat exchanger temperature at B3 reaches the setpoint (controller

N1).

3337S04

Collector sensor QAP21.2

Heat exchanger sensor

Storage tank

Collector

Charging pump 1 (solar circuit)

Charging pump 2 (storage tank

circuit)

Differential temperature controller

RLE127.QAZ

Immersion temperature controller RLE132

Immersion temperature controller (immersion length 150 mm). Modulating control

via actuating device on the water side (seat or slipper valve). Positioning signal

(3-pos.) acting on electromotoric actuator (for switching AC 24…230 V, max. 2 A).

• Used as a controller or minimum/maximum limiter

• Control in Economy mode (setpoint lowered)

• Control in Boost mode (setpoint raised)

• Minimum or maximum limitation of flow or return temperature

• Setpoint changeover via external contact

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

• Outside temperature compensation, remote setpoint adjustment

• Frost protection

Use

Application example