Electronic climate controller for cooling ceilings, KTRRU – with internal and external (optional) temperature sensor – flush-mounted installation – Design Berlin UP
Technical data
Application
For heating/cooling control of 2- and 4-pipe systems used in hotels, homes and offices. The unit can control up to 5 valve actuators (24 V~ normally closed) per output. The controllers are configured for 2-pipe or 4-pipe operation by means of a jumper. In 2-pipe opera- tion, the controller is operated with a common heating/cooling output, whose mode of operation action can be toggled by means of an external contact (changeover contact). Con- nection 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.
Design:
Berlin UP (flush-mounted)
Housing material: Operating voltage: Ambient temperature: Storage temperature: Permissible atmospheric humidity: Electrical connection:
PC plastic
24 VAC/50 Hz, 24 VDC
0 … 40 °C
−20 … +70 °C
max. 95% rel. humidity, non-condensing screw-type terminals
Protection rating: Protection class: Safety and EMC:
IP 30
III
according to DIN EN 60730
Average power consump- tion: Max. switching current: Max. switching voltage: Min. switching voltage:
approx. 0.6 W (1 VA)
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 interruption upon condensation of the dew point sensor, frost protection function in the switched-off condition
Sensor:
ECO contact:
Control function:
Control range: Setting range:
13 ... 29 °C –8 ... +8 °C approx. 1 K approx. 2 K
Hysteresis:
Neutral zone:
General features:
single-room climate controller; op- tional external dew point sensor; ECO function; “heating / cooling / cooling interruption due to condensation / off” display; mechanical range restriction; relative scale; external setting
Pipe system compatibility:
2-pipe and 4-pipe
Type/image
Item no.
Features
PG
KTRRU-052.245#00
General features: “Off with frost protection monitoring” operating mode; “off / comfort / ECO” switch
UA210401
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 cover set 50 x 50 mm or 55 x 55 mm in almost all surface switch ranges (deep flush-mounted socket recommended) Accessories: Cover sets are offered in several design variants (see “Overview”, page 125) and are not included in the delivery scope. Matching set no.: JZ-007.xxx, e.g.:
cover set 50 x 50 mm, pure white, glossy: JZ-007.000 cover set 55 x 55 mm, 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 intermediate positions, if both sensors are used, a weighting is applied to the internal room sensor and the external radiation sensor. The weight- ing allows for compensation 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 144), dew point sensor TPS 1 / TPS 2 / TPS 3 (see page 136), suitable external sensors (“Sensor 2”); see “Sensor Technology”).
Catalogue 2022 | Page 123
Made with FlippingBook Digital Publishing Software