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 ceilings/walls and all kinds of hot water heaters in 2- and 4-pipe sys- tems for hotels, offices and private homes. 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, like RAL 9010
ABS plastic 0 … 40 °C
Ambient temperature: Operating voltage: Storage temperature: Permissible atmospheric humidity: Electrical connection: Mounting/attachment:
24 VAC/50 Hz, 24 VDC
−20 … +70 °C
max. 95% rel. humidity, non-condensing screw-type terminals Surface-/wall-mounting
Protection rating: Protection class: Safety and EMC:
IP 30
III
When using 0–10 V actuators: KTRVB-052.24x.
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 connec- tion; mechanical range limitation; external setting
Type/image
Item no.
Features
Circuit diagram
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 Control function: 13 … 29 °C Setting range: −8 … +8 °C Neutral zone: Approx. 2 K Pipe system compatibility: 2-pipe and 4-pipe
DA420600
see page 122
I
Catalogue 2022 | Page 120
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