PRODUCT CATALOGUE 2024 | alre.de

AIR CONDITIONING TECHNOLOGY

ELECTRONIC CLIMATE CONTROLLER FOR COOLING CEILINGS, KTRRU – WITH INTERNAL AND EXTERNAL (OPTIONAL) TEMPERATURE SENSOR – FLUSH-MOUNTED INSTALLATION – DESIGN BERLIN UP

TECHNICAL DATA

APPLICATION

Design:

Berlin flush-mounted

For heating / cooling control of 2- and 4-pipe systems used in hotels, homes and offices. The unit can control up to 5 valve actu- ators (24 V~ normally closed) per out - put. The controllers are configured for 2-pipe or 4-pipe operation by means of a jumper. In 2-pipe operation, the controller is operated with a common heating / cooling output, whose mode of operation action can be toggled by means of an external contact (change- over contact). Connection of TPS dew point sensors is possible (max. 5 of them in parallel). Condensate formation at the TPS can result in the cooling valve getting closed. It is possible to actuate the energy saving (ECO) function via an external contact. In the ‘off’ switch position, the room frost protection function is activated (when the temperature drops below 5 °C, all valves are forced open). External flow sensor (H / C sensor): for automatic switching of the controller to heating or cooling mode depending on the inflow temperature (‘Sensor 2’); alternatively, this input can be used as an H / C changeover contact.

Housing material: Operating voltage: Ambient temperature: Storage temperature: Permissible atmospheric humidity: Electrical connection:

PC plastic

24 VAC / 50 Hz, 24 VDC

0 to 40 °C

−20 to +70 °C

max. 95% rel. humidity, non-condensing screw-type terminals

Protection rating: Protection class: Safety and EMC:

IP30

III

according to DIN EN 60730

Average power consumption:

approx. 0.6 W (1 VA)

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’* when the contact is closed, the ECO function is actuated (+ / – 3 K) heating and / or cooling, cooling inter- ruption upon condensation of the dew point sensor, frost protection function in the switched-off condition

Sensor:

ECO contact:

Control function:

Control range: Setting range: Hysteresis: Neutral zone:

13 to 29 °C − 8 to +8 °C approx. 1 K approx. 2 K

General features:

single-room climate controller; optional external dew point sensor; ECO function; ‘heating / cooling / cooling interruption due to condensation / off’ display; me- chanical range restriction; relative scale; external setting

Pipe system compatibility:

2-pipe and 4-pipe

TYPE / IMAGE

ITEM NO.

FEATURES

EURO / PG

KTRRU-052.245#00

General features: ‘off with frost protection monitoring’ operating mode; ‘off / comfort / ECO’ switch

UA210401

205.80 / I

Surface finish: depending on the cover set selected Housing colour: depending on the cover set selected

Mounting / attachment: in flush-mounted socket – adaptable with 50 x 50 mm or 55 x 55 mm cover set in almost all surface switch ranges (deep flush-mount - ed socket recommended) Accessories: Cover sets are offered in several design variants (see ‘Overview’, page 131) and are not included in the scope of delivery. Suitable set no.: JZ-007.xxx, e.g.:

50 x 50 mm cover set, pure white, glossy: JZ-007.000 55 x 55 mm cover set, pure white, glossy: JZ-007.100 Scope of delivery: controller, protective cap

If the functions of the ‘off / comfort / eco’ switch are not required, JZ-008.xxx cover sets can be used instead (in switch position comfort).

* An internal trimming potentiometer can be used to select whether control should be based on the internal (left stop) or external sensor (right stop). In the interme- diate positions, if both sensors are used, a weighting is applied to the internal room sensor and the external radiation sensor. The weighting allows for compen- sation of different structural conditions such as large window areas or cardinal directions. For very slow controlled systems, it is recommended to assign a higher weighting to the radiation sensor than to the internal room sensor.

Accessories: suitable valve actuators ZBOOA-040.100 (see page 151), dew point sensor TPS 1 / TPS 2 / TPS 3 (see page 142), suitable external sensors (‘Sensor 2’); see ‘Sensor technology’.

129

Catalogue 2024

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

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