Technical Instructions
RCC10U Room Temperature Controller
Document Number 155-712
for Two-pipe Fan Coil Units
September 27, 2007
Page 2
Siemens Industry, Inc.
Accessories
ARG70
Adapter plate, for 2-inch × 4-inch or 4-inch × 4-inch electrical wall boxes
QAH11.1
Changeover/remote sensor
141-570
Lockable Thermostat Guard
Ordering
The QAH11.1 temperature sensor (which can be used as a return air temperature or
changeover sensor), and valves must be ordered separately. An ARG70 Wall Box
Adapter (used to mask the drywall when mounting the controller to a 2-inch × 4-inch or
4-inch × 4-inch electrical wall box) must also be ordered separately.
Table 1. Equipment Combinations.
Product Number
Description
Technical Instructions
QAH11.1
Temperature Sensor
155-329P25
599 Series
Two-way and Three-way
Zone Valves
155-320P25
SF Series
Zone Valve Actuator
155-321P25
Warning/Caution Notations
WARNING:
Personal injury, or loss of life may occur if you do not follow a
procedure as specified.
CAUTION:
Equipment damage, or loss of data may occur if you do not
follow a procedure as specified.
Functions
The controller measures the room temperature with its integrated sensor or external
return air temperature sensor (QAH11.1)
—if used—and maintains the setpoint by
delivering control commands to the two-position (on/off) valve.
The switching differential is adjustable; it can be 2°F (1°C) or 7°F (4°C) in Heating
mode, or 1°F (0.5°C) or 3.5°F (2°C) in Cooling mode.
Fan Operation
The fan is switched to the selected speed via control output 11, 10 or 9 (Low, Medium
or High).
When the Temperature-dependent fan control function is activated (can be selected
with DIP Switch No. 1), the fan and valve are switched ON or OFF depending on the
temperature.
It is switched OFF by:
•
Leaving the Heating or Cooling sequence, if the function Temperature-dependent
fan control is activated.
•
Manually changing to Standby , if room conditions do not call for Freeze Protection
mode.
•
Activating an external operating mode changeover switch, if installation conditions
do not call for Energy Saving or Freeze Protection mode.
•
Turning the controller’s power supply OFF.
