Siemens RDF30U User Manual

RDF30U
Technical Instructions
Document No. 155-335
September 27, 2007
Room Temperature Controller
with LCD for Four-Pipe Fan
Coil Units
Siemens Industry, Inc.
Description
Room temperature controller with LCD for four-pipe fan coil units.
Features
• Outputs for separate, heating and cooling on/off valve actuators.
• Outputs for a three-speed fan.
• Control depending on the room or the return air temperature.
• Operating modes: Normal, Economy and Standby.
• Operating mode changeover input for remote control (Day/Night).
• Air movement control function for avoiding damage resulting from moisture.
• Selectable installation and control parameters.
• Display of room temperature or setpoint (selectable).
• Electronic minimum and maximum setpoint limits.
• Operating voltage 24 Vac.
Application
Typical use:
• For controlling room temperature in individual rooms that are heated or cooled with
four-pipe fan coil units.
• For opening or closing two valves and for switching a three-speed fan.
Suitable for four-pipe fan coil unit systems with:
• automatic heating/cooling changeover.
• continuous heating or cooling mode.
Product Number
RDF30U

Siemens RDF30U Specifications

General

Display	LCD
Power Supply	24 V AC/DC
Operating Voltage	24 V AC/DC
Digital inputs, number	2
Relay outputs, number	2
Control Algorithm	PID
Input Type	Thermocouple, RTD, Voltage, Current
Output Type	Relay
Operating Temperature	0 to 55 °C

Summary

Product Description and Features

Key Features

Lists outputs for actuators, fan speeds, operating modes, and air movement control.

Typical Applications

Operational Overview

Safety Warnings and Cautions

Provides crucial safety information regarding personal injury or equipment damage.

Operational Principles

Fan Control Logic

Heating Mode Operation

Cooling Mode and Operating Modes

Cooling Mode Operation

System Operating Modes

Describes Normal, Economy, and Standby modes and their functionalities.

Normal Mode Functionality

Economy Mode Activation

Standby Mode Settings

Advanced Control and Parameters

Moisture Damage Prevention

Control Parameter Adjustment Procedure

Details the step-by-step procedure for setting and changing control parameters.

Control Parameters Reference

Lists and describes various control parameters (P01-P23) with their settings and ranges.

Installation and Specifications

Mounting and Installation Guidelines

Provides guidelines for mounting, installation, and initial commissioning of the controller.

DIP Switch Configuration

Explains the function and settings for the controller's DIP switches.

Power Supply and Ratings

Operational Data Ranges

Wiring and Environmental Data

Wiring Terminals and Diagrams

Illustrates terminal connections and provides wiring diagrams for fan coil units.