User Manual

ManualsBrandsSiemens ManualsThermostats (temperature controller with sensor)Room Temperature Controller RCC50.1

CE1N3025en

12.06.2003

Siemens Building Technologies

HVAC Products

025

Room Temperature

Controller

RCC50.1

for two-pipe fan coil units

Modulating PI control

Output for DC 0…10 V valve actuator

Outputs for three-speed fan

Automatic heating / cooling changeover

Operating modes: normal and energy saving or OFF

Operating mode changeover input for remote control

Function for avoiding damage resulting from moisture

Operating voltage AC 24 V

Use

Typical use:

• Control of the room temperature in individual rooms that are heated or cooled

with two-pipe fan coil units.

• For opening or closing a DC 0…10 V valve actuator

• For switching a three-speed fan.

Suited for use in systems with

• automatic heating / cooling changeover

• continuous heating or cooling operation.

Summary of content (8 pages)

PAGE 1
3 Room Temperature Controller 025 RCC50.1 for two-pipe fan coil units Modulating PI control Output for DC 0…10 V valve actuator Outputs for three-speed fan Automatic heating / cooling changeover Operating modes: normal and energy saving or OFF Operating mode changeover input for remote control Function for avoiding damage resulting from moisture Operating voltage AC 24 V Use Typical use: • • • Control of the room temperature in individual rooms that are heated or cooled with two-pipe fan coil units.
PAGE 2
Functions Cooling mode Y10 [%] Y10 [%] 3025D01 Heating mode 100 3025D02 The controller acquires the room temperature with its integrated sensor and maintains the setpoint by delivering DC 0…10 V control commands to the valve. The controller provides PI control. The proportional band in heating mode is 4 K and in cooling mode 2 K. The integration time is 5 minutes.
PAGE 3
Operating modes The following operating modes are available: Normal operation Heating or cooling mode with automatic changeover and with manually selected fan speed III, II or I. In normal operation, the controller maintains the adjusted setpoint. In operating mode selector position , the controller is switched off. Energy saving mode In energy saving mode, the setpoint of heating is 16 °C and the setpoint of cooling 28 °C, independent of the position of the setpoint knob.
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 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. 3021Z01 Setting and operating elements 2 3 5 6 4 1 1.
PAGE 5
Engineering notes In systems with automatic changeover, the temperature sensor can be replaced by an external switch for manual changeover. In systems with continuous heating operation, no sensor will be connected to the controller’s input. With continuous cooling operation, the controller input (B2–M) must be bridged. Mounting, installation and commissioning Mounting location: on a wall or inside the fan coil unit.
PAGE 6
Technical data Power supply Operational data Environmental conditions Norms and standards Operating voltage Frequency Power consumption Control outputs Q1, Q2, Q3 Rating Control output Y10 Resolution Current Signal input B2 for changeover-sensor Status input D1 and GND Contact sensing Insulation against mains Operating action Perm. cable length with copper cable 1.5 mm2 for connection to terminals B1, B2 and D1 Setpoint setting range Max.
PAGE 7
Connection terminals General Use solid wires or prepared stranded wires. 2 x 0.4-1.5 mm2 or 1 x 2.5 mm2 0.
PAGE 8
3021M01 Dimensions 114,15 unit 42,8 96,6 4 28 baseplate 4 30 26 90 8/8 Siemens Building Technologies HVAC Products 2002 Siemens Building Technologies AG Room temperature controller 3021M02 11,8 30 28 104 4 35 28 28 Subject to alteration CE1N3025en 12.06.