23/130
Siemens Building Technologies Basic Documentation RVD230 CE1P2383en
HVAC Products 3 Fundamentals 27.05.2004
B1
Y5
B7
Q1
A6
B9
2383S30
B32
B3
H5
Q3
B71
Y1
Y2
A6 Room unit
B1 Flow sensor heating circuit
B3 D.h.w. flow sensor
B32 Return sensor d.h.w.
B7 Common primary return sensor*
B71 Secondary return sensor heating circuit
B9 Outside sensor
H5 Flow switch (mandatory)
Q1 Heating circuit pump
Q3 Circulating pump (optional)
Y1 2-port valve primary heating circuit
Y2 2-port valve primary d.h.w. circuit
Y5 2-port valve common return
a) Circulating pump feeding water into the heat exchanger’s return
b) Circulating pump feeding water into the storage tank
* Suppression of hydraulic creep
3.2 Operating modes
3.2.1 Heating circuit control
The RVD230 offers the following operating modes:
Automatic operation
• Automatic heating operation, changeover between nominal room tempera-
ture and reduced room temperature according to the time program
• Demand-dependent switching of the heating system as a function of the
outside temperature while giving consideration to the building's thermal in-
ertia (ECO function)
• Remote operation via room unit (optional)
• Frost protection is ensured
Continuous operation
• Heating mode with no time program
• Heating to the temperature adjusted with the setting knob
• Automatic ECO function inactive
• Frost protection is ensured
Standby
• Heating operation at the frost protection level
• Frost protection is ensured
3.2.2 D.h.w. heating
• ON (button is lit): D.h.w. heating takes place independent of the heating
circuit’s operating mode and control (no d.h.w. heating during holiday peri-
ods)
• OFF (button dark): No d.h.w. The circulating pump switches off. Frost
protection is ensured
3.2.3 Manual operation
• No control
• All pumps are in operation
• The 2-port valve in the primary circuit can be manually adjusted with setting
buttons
For more details, refer to chapter 31 "Manual operation"
To Next Page
Loading...
