Document No. 155-747
March 13, 2008
Room Temperature Controller
with LCD
Siemens Industry, Inc.
Description
Controller for heat pump systems with reversing valve, optional electric heater, one- or
two-stage heating and one-stage cooling.
Features
• Outputs for one-stage compressor and reversing valve or on/off valve actuators
• Output for auxiliary electric heating
• Output for a one-speed fan
• Room or return air temperature control
• Manual heating/cooling changeover
• Operating modes: Normal (heating, cooling), Energy Saving, Off
• Operating mode changeover input for remote control
• Selectable installation and control parameters
• Operating voltage 24 Vac
Application
• For control of heat pump systems with reversing valve, optional electric heater, one-
or two-stage heating and one-stage cooling
• For control of room temperature in individual rooms that are heated or cooled with
four-pipe fan coil units and optional electric heating
• For opening and closing a valve
• For switching a one-speed fan
Product Number
RDX42.22U
Accessories
ARG70 Adapter Plate for 4 × 4-inch conduit boxes
QAH11.1 Changeover/Remote Temperature Sensor
141-570 Lockable Thermostat Guard
Ordering
The QAH11.1 temperature sensor (can also be used as a return air temperature
sensor) and the zone valves must be ordered separately.
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