Siemens RDF20U User Manual

RDF20U Room Temperature Controller with LCD Technical Instructions
For Two-Pipe Fan Coil Units with Electric Heat Document Number 155-334
September 27, 2007
Siemens Industry, Inc. Page 5
Application Diagrams
Figure 4. Heating Mode (Hot Water Plus
Electric Heat).
Figure 5. Cooling Mode with Optional
Electric Heat
(DIP Switch 4: ON, Electric Heat
Enabled)).
Figure 6. Cooling Mode (Chilled Water)
(DIP Switch 4: OFF, Electric Heat
Disabled).
T[°F] Room temperature
w Room temperature setpoint
w
D
Setpoint differential
Y Heating/cooling valve output
voltage
E Electric heat
SDH Switching differential, Heating
SDC Switching differential, Cooling
Xdz Dead zone

Siemens RDF20U Specifications

General

Brand	Siemens
Model	RDF20U
Category	Temperature Controller
Language	English