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Siemens Building Technologies Basic Documentation RVD110, RVD130 CE1P2381E
HVAC Products 3 Fundamentals 27.05.2004
A6 Room unit
B1 Flow temperature sensor heating circuit (plant types no. 4...6)
or common flow (plant types no. 7+8)
B3 D.h.w. temperature sensor
B7 Primary return temperature sensor
B71 Secondary return temperature sensor (plant types no. 4 and 7)
or d.h.w. temperature sensor 2 (plant
type no. 5)
or flow temperature sensor heating circuit (plant type no. 8)
B9 Outside sensor
F1 D.h.w. thermostat
H5 Flow switch
N1 Controller
Q1 Heating circuit pump
Q3 D.h.w. charging pump
Q7 D.h.w. circulating pump controlled by the controller
Q Externally controlled circulating pump
Y1 2-port valve in the primary return
Y5 2-port valve in the d.h.w. circuit (plant types no. 4...6)
or mixing valve in the d.h.w. circuit (plant type no. 7)
or in the heating circuit (plant type no. 8)
Y7 Mixing valve in the d.h.w. circuit (plant type no. 5) or 2-port valve in the primary return (plant type no. 6b)
3.3 Operating modes
3.3.1 Heating circuit control
The RVD110 / RVD130 offer the following operating modes:
Automatic mode
• Automatic heating operation, changeover between nominal and reduced
room temperature according to the time program
• Demand-dependent switching of the heating system based on the pro-
gression of the outside temperature while giving consideration to the
building’s thermal inertia (automatic ECO function)
• Optional remote operation via room unit
• Frost protection is ensured
Continuous operation
• Heating operation with no time program
• Heating to the room temperature adjusted with the setting knob
• Automatic ECO function inactive
• Frost protection is ensured
Standby
• Heating to the frost protection level
• Frost protection is ensured
3.3.2 D.h.w. heating
D.h.w. heating ON / OFF
• ON (button lit): D.h.w. is heated independent of the heating circuit’s op-
erating mode and control (no d.h.w. heating during holiday periods)
• OFF (button dark): No d.h.w. heating; circulating pump switches off, frost
protection is ensured
3.3.3 Manual operation
Manual operation
• No control
• Heating circuit pump and d.h.w. pump(s) are running
• 2-port vale in the primary circuit can be manually operated with the setting
buttons
For more detailed information, refer to chapter 21 “Manual operation”.
Legend for plant
types no. 4...8:
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