Advertisement
Specifi cations/Product Ordering
Power Supply
Operating Voltage ............................................................. 24 Vac ±20%
Frequency ................................................................................ 50/60 Hz
Setpoint Setting Range ...................................... 50 to 85°F (10 to 30°C)
P-band in Heating Mode
RCU50U .................................................................... 2 or 7°F (1 or 4°C)
RCU50.2U (fi xed) .................................................................... 7°F (4°C)
P-band in Cooling Mode
RCU50 ................................................................ 1 or 3.5°F (0.5 or 2°C)
RCU50.2 (fi xed) ................................................................... 3.5°F (2°C)
Setpoint (Energy Saving Mode), Heating ........................... 61°F (16°C)
Setpoint (Energy Saving Mode), Cooling ........................... 82°F (28°C)
Setpoint Freeze Protection ..................................................... 46°F (8°C)
Setpoint Shift Temperature @ 72°F (22°C) ............... +22.5°F (±12.5°C)
Control Action
RCU15U ............................................................................. On/Off/PWM
RCU50U & RCU50.2U ........................................................ Proportional
Control Outputs, Terminals 4 and 5 (RCU 50...)
Voltage ................................................................................. 0 to 10 Vdc
Current ......................................................................................... ±1 mA
Control Outputs, Terminals 7 and 8 (RCU15U) ...........PWM or ON/OFF
Voltage .............................................................................. 24 Vac ±20%
Current ................................................................................... 0.02 to 1A
Cycle time PWM (selectable for terminal 7) ...........................20s or 90s
A-48
Status Input D1 (RCU50U)
Contact sensing ................................................... 6 to 15 Vdc/3 to 6 mA
Insulation against live voltage ......................................................... 4 kV
Maximum number of contacts connected in a panel .......................... 50
Heat/Cool Changeover
Automatic
Automatic
Manual
Ordering Note:
The temperature sensor, changeover mounting
kit, and valve and damper actuators must be ordered separately,
see table below.
Device Combinations
Description
Remote Cable
Temperature/Changeover Sensor
44 lb-in NSR Air Damper Actuator
88 lb-in NSR Air Damper Actuator
Valve Actuator
Valve Actuator
Valve Actuator
www.usa.siemens.com/hvaccomponents
Output(s)
Part No.
(2) On/Off or PWM
RCU15U
(1) 0 to 10 Vdc
RCU50U
(1) 0 to 10 Vdc
RCU50.2U
Part No.
QAH11.1
GDE16...
GLB16...
SSB61U
SSC61U
SSC61.5U
SQS65U
SQS65.5U
Status Inputs 1 and 2 (RCU50U)
Setpoint shift of +22.5°F @ 72°F (22°C) .............................. 0 to 10 Vdc
Neutral position (no setpoint shift) ................................................. 5 Vdc
Signal Input Terminals 2 and 3
for Changeover Sensor ....................................... QAH11.1 safety class 2
Maximum Copper Cable Length 16 AWG
For Input Signal terminals 1 & 2 (RCU50U) .................... 262 feet (80m)
For Input Signal D1 (RCU50U) ....................................... 262 feet (80m)
Operation
Temperature ...................................................... 32 to 122°F (0 to 50°C)
Humidity .................................................................................. <95% RH
Shipping and Storage
Temperature .................................................. -13 to 158°F (-25 to 70°C)
Humidity .................................................................................. <95% RH
Agency Approvals .......................................................... UL listed UL 873
cUL certifi ed to Canadian Standard C22.2 No. 24-93
Connection Terminals ....... Use Solid Wires or Prepared Stranded Wires
2 x 16 AWG or 1 x 14 AWG, 20 AWG max.
Housing Color
Cover ............................................................................................. White
Base ...............................................................................................Gray
Shipping Weight ............................................................... 0.5 lb (0.23 kg)
NTC resistor 3KΩ @ 77°F (25°C)
Conforms to CE requirements
Advertisement
