PRODUCT CATALOGUE 2024 | alre.de

AIR CONDITIONING TECHNOLOGY

ELECTRONIC CLIMATE CONTROLLER FOR COOLING CEILINGS, KTRRB SURFACE-MOUNTED INSTALLATION – DESIGN BERLIN 2000 – WITH INTERNAL AND EXTERNAL (OPTIONAL) TEMPERATURE SENSOR

TECHNICAL DATA

APPLICATION

Design:

Berlin 2000

Temperature controller for cooling ceil- ings / walls and all kinds of hot water heaters in 2 and 4-pipe systems for hotel, home and office spaces. As the KTRRB features dew point monitoring, it is highly suited for controlling ceiling cooling systems. The unit can control up to 5 valve actuators (24 V~ normally closed) per output. The types KTRRB-052.24x can be adapted to normally open actuators (24 V~, max. 5 pieces) with a jumper.

Surface finish: Housing colour: Housing material:

matt

pure white, similar to RAL 9010

ABS plastic 0 to 40 °C

Ambient temperature: Operating voltage: Storage temperature: Permissible atmospheric humidity: Electrical connection: Mounting / attachment:

24 VAC / 50 Hz, 24 VDC

−20 to +70 °C

max. 95% rel. humidity, non-condensing screw-type terminals surface / wall mounting

Protection rating: Protection class: Safety and EMC:

IP30

When using 0 – 10 V actuators: KTRVB- 052.24x.

III

according to DIN EN 60730

Max. switching current: Max. switching voltage: Min. switching voltage:

1 A

24 VAC / 50 Hz, 24 VDC 24 VAC / 50 Hz, 24 VDC

Switching power: Switching element: Switching contact:

24 W relay

NO contact

Output signal:

Switching, 24 VAC / 50 Hz, 24 VDC NTC internal, optional external, ‘Sensor 2’*

Sensor:

Hysteresis:

approx. 1 K

General features:

External dew point sensor connection; mechanical range limitation; external setting

TYPE / IMAGE

ITEM NO.

FEATURES

CIRCUIT DIAGRAM

EURO / PG

KTRRB-052.244

General features: ECO function; ‘heating / cooling / cooling interruption due to condensation / off’ display; ‘sensor rupture, sensor short-circuit, frost protection’ display; relative scale External flow sensor (H / C sensor): for automatic switching of the controller in heating or cooling mode depending on the inflow temperature (‘Sensor 2’). Alternatively, this input can be used as an H / C changeover contact Eco contact: upon closing the contact, the ECO function is actuated Forced switch-off contact: external switch-off function with frost protection function Control function: heating and / or cooling, cooling interruption upon condensation of the dew point sensor, frost protection function in the switched- off condition

DA420600

see page 128

200.80 / I

Control function: 13 to 29 °C Setting range: − 8 to +8 °C Neutral zone: approx. 2 K Pipe system compatibility: 2-pipe and 4-pipe

126

Catalogue 2024

Prices valid from 01.01.2024 - 31.12.2024, prices may be subject to change | V1

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