User Manual

ManualsBrandsSiemens ManualsRoom controlsUniversal Room Controller

CE1N3048en

2017-11-14

Building Technologies

048

RCU15

Room Temperature Controllers

RCU15

for heating and cooling systems

Choice of two-position or modulating PI control

ON / OFF or PWM outputs for heating and cooling

Control depending on room- or return air temperature

Operating modes: normal operation, energy saving and standby

Operating mode changeover input for remote control

Operating voltage AC 24 V

Use

Control of the room temperature in individual rooms of ventilation or air conditioning

plants that are heated or cooled with radiators, chilled ceilings, etc.

For the control of the following pieces of equipment:

∂ Thermic valve actuators

∂ Damper actuators

Functions

The controller acquires the room temperature with its integrated sensor or external

room temperature sensor (QAA32) or return air temperature sensor (QAH11.1)

- if used - and maintains the setpoint by delivering control commands. It is possible to

choose PI control with PWM actuating commands or two-position control with ON / OFF

actuating commands.

Summary of content (8 pages)

PAGE 1
3 048 RCU15 RCU15 Room Temperature Controllers for heating and cooling systems Choice of two-position or modulating PI control ON / OFF or PWM outputs for heating and cooling Control depending on room- or return air temperature Operating modes: normal operation, energy saving and standby Operating mode changeover input for remote control Operating voltage AC 24 V Use Control of the room temperature in individual rooms of ventilation or air conditioning plants that are heated or cooled with radiators, c
PAGE 2
The proportional band or the switching differential can be 1 or 4 K in heating mode and 0.5 or 2 K in cooling mode (selectable). The integration time cannot be adjusted and is 10 minutes. The operating sequence “Heating – cooling or heating – heating” can be selected with DIP switch no. 7. Function diagram “Heating-cooling” 2 P.
PAGE 3
Return air temperature or external room temperature The RCU15 provides control depending on the temperature acquired either by its integrated sensor, external room sensor or return air temperature sensor in the fan coil unit. Changeover is automatic if a QAH11.1 cable temperature sensor or external room temperature sensor QAA32 is connected to the device. Energy saver The room temperature setpoint can be limited in increments of 1 K by making use of the minimum and maximum limitation facility.
PAGE 4
Mechanical design The unit consists of two parts: ∂ ∂ A plastic housing which accommodates the electronics, the operating elements and the built-in room temperature sensor A mounting base 3048Z01 The housing engages in the mounting base and snaps on. The base carries the screw terminals. The DIP switches are located at the rear of the housing.
PAGE 5
Accessories Description Adapter plate 120 x 120 mm for 4“ x 4“ conduit boxes Adapter plate 96 x 120 mm for 2“ x 4“ conduit boxes Adapter plate for surface wiring 112x130 mm Type reference ARG70 ARG70.1 ARG70.2 Notes Check the settings of DIP switches no. 1 through no. 8 and change them, if required. If setpoint limitation is required, use the minimum and maximum limitation facility (energy saver). After applying power, the controller makes a reset, which takes about 3 seconds.
PAGE 6
Technical data Power supply Functional data Environmental conditions Norms and standards Environmental compatibility Eco design and labelling directives Operating voltage AC 24 V ± 2 0 % Frequency 50/60 Hz No internal fuse External preliminary protection with max. C 10 A circuit breaker in the supply line required under all circumstances Power consumption max. 6 VA Setpoint setting range 8...30 °C Max. control deviation at 25 °C max. °0.
PAGE 7
General Connection terminals for Use solid wires or prepared stranded wires. 2 x 1.5 mm2 or 1 x 2.5 mm2 0.23 kg white, NCSS0502-G (RAL 9003) Weight RCU15 Colour of housing front *) The documents can be downloaded from http://siemens.
PAGE 8
3041M01 Dimensions 114.15 Controller 42,8 96,6 Baseplate 4 28 11,8 30 28 104 4 35 28 28 4 26 3041M02 30 90 Issued by Siemens Switzerland Ltd. Building Technologies Division International Headquarters Gubelstrasse 22 CH-6300 Zug Tel. +41 58-724 24 24 www.siemens.com/buildingtechnologies 8/8 Siemens Building Technologies © Siemens Switzerland Ltd, 2003 - 2017 Technical specifications and availability subject to change without notice.