User Manual

ManualsBrandsSiemens ManualsOperator unitsRoom control unit KRT-1B

Siemens Building Technologies CA2N1612E / 11.1998

Landis & Staefa Division 1/4

612

KRT-1B

Room control unit

Application

For use in conjunction with THERMO

RH500 heating controllers and

controllers in the INTEGRAL range, for

measurement and adjustment of the

room temperature.

Incorporates:

– programme extension switch to

extend the heating time.

– manual switch to change the

operating mode.

KRT-1B

Technical Data

Setpoint adjustment range ± 4 K (in increments of 1 K)

Sensor measuring range (T1) –50 ... 150 °C

Sensor correction range (T1) ± 2.5 K (trimming potentiomter)

Programme extension switch 1, 2 ou 4 hr extensione time

Mode selector switch 4 Auto 3 Day Night

Connection:

T1 sensor 2 wire, interchangeable

Operating mode switch 3 wire

Max. cable length 170 m 1.5 mm

110 m 1.0 mm

(max 2 Ω per conductor)

Protection class III 2

Protection standard IP30 to IEC529, DIN 40050

Ambient temperature:

Operation 0 ... 50 °C

Storage –30 ... 70 °C

Principle of operation

Using the setpoint adjuster the setpoint programmed into the controller may be

adjusted by ± 4 K.

Using the programme extension switch (marked “party“ on the unit), the comfort

temperature can be extended by either 1, 2 or 4 hours. The extension time selected

is indicated by an LED. If an extension time is selected during Day mode, this is me-

morised and the change-over to Night mode will be delayed by time selected. If an

extension time is selected during Night mode, the controller will immediately switch

to Day mode. When the extension time has elapsed, the normal programme will be

resumed.

The operating mode selector switch may be used to select constant day or night

mode irrespective of the controller programme. Switching to Night mode results in

control at the setback temperature.

The temperature sensor is fitted with a silicon element with a positive temperature

coefficient, i.e. one whose resistance increases as the temperature rises.

The temperature sensor (T1) may also be corrected by ±2.5 K with the trimming

potentiometer, which is built into the base of the device and can be adjusted

through an aperture in the housing.

Summary of content (4 pages)

PAGE 1
612 KRT-1B Room control unit Application For use in conjunction with THERMO RH500 heating controllers and controllers in the INTEGRAL range, for measurement and adjustment of the room temperature. Incorporates: – programme extension switch to extend the heating time. – manual switch to change the operating mode.
PAGE 2
T1 sensor correction 9H547 (Midpoint) ± 0 K Factory setting Positive correction + Negative correction – Construction The unit is supplied in a standard multi-part plastic housing. (For description and dimensions see 1718) Mounting instructions The room control unit should be mounted approximately 1.5 m above floor level. If the temperature sensor is used, locations where it will be exposed to undue influences from heat, draughts and moisture (e.g.
PAGE 3
Connection diagrams - staefa integral RS Terminal layout KRT-1L 1) KRT-1B Logik KRT-1L 2) KRT-1B 92.00289 1 2 3 4 5 6 7 8 T1 output Logik +5 ... 15 VDC GND Out 1) Standard, 5-wire 1) Only one KRT-1B or 1 KRT-1L may be fitted per NTOM(S) output module carrier i.e. max. 1 KRT-1B for NRUA, NRUB max.