Siemens RVL481 - 1 Summary; Brief Description and Key Features; Equipment Combinations; Suitable Sensors

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Siemens Heating and D.h.w. Controller RVL481 CE1P2541en
Building Technologies 1 Summary 20.05.2008
1 Summary
1.1 Brief description and key features
• The RVL481 is a multifunctional heating controller for use in residential and non-
residential buildings that have their own d.h.w. heating facility
• Suited for:
− Heating zone control with or without room influence via weather-compensated flow
temperature control
− Precontrol via demand-compensated control of the main / secondary flow
temperature
− Precontrol via demand-compensated boiler temperature control. Suited for integra-
tion into heat source cascades or heat generation systems (heat pump, solar,
wood)
• For use in plants with own heat generation or with a district heat connection
• With regard to d.h.w. heating, the RVL481 is suited for plants with d.h.w. storage tanks,
electric immersion heaters, solar d.h.w. heating and instantaneous systems with own
heat exchangers
• The RVL481 has 29 plant types preprogrammed. When a certain type of plant is se-
lected, all functions and settings required for that plant will be activated
• A scalable voltage output DC 0…10 V is used to pass the heat demand signal to other
systems
• A multifunctional relay provides additional control functions, if required
• For direct adjustment of the heating curve, the well known “bar" is used. Digital ad-
justment of the heating curve is possible also. A setting knob is used for making room
temperature readjustments
• All the other parameters are set digitally based on the operating line principle
• The RVL481 is capable of communicating with other units via LPB (Local Process Bus)
• Key design features: Operating voltage AC 230 V, CE conformity, overall dimensions
to IEC 61554 (144 × 144 mm)
1.2 Equipment combinations
1.2.1 Suitable sensors
• For water temperatures:
Suitable are all types of temperature sensors that use a sensing element
LG-Ni 1000. The following types are presently available:
− Strap-on temperature sensor QAD22
− Immersion temperature sensors QAE212…
− Immersion temperature sensor QAP21.3 complete with connecting cable
− Immersion temperature sensor QAP21.2 complete with connecting cable, for solar
use
• For the room temperature:
Suitable are all types of temperature sensors that use a sensing element LG-Ni 1000:
− Room temperature sensor QAA24
• For the outside temperature:
− Outside sensor QAC22 (sensing element LG-Ni 1000)
− Outside sensor QAC32 (sensing element NTC 575)