VITOTRONIC 300
Weather-responsive indoor/outdoor, digital boiler control for heating systems with one or more heating circuits
Technical Data Manual
Vitotronic 300
Model KW3, Part No. Z001 231
For operation with modulating boiler water temperatures and single-stage, two-stage or modulating burners
For heating systems with one heating circuit without mixing valve and up to two heating circuits with mixing valves
With DHW tank temperature sensor and integrated diagnostic system
Operating module with clear text LCD display
Remote control interface with or without room temperature sensing
Viessmann quick-connect plug-in system
5265 533 v1.4 09/2011
Certified as a component part
of Viessmann boilers only
Product Information/Standard Equipment/
Application
Product Information
The benefits at a glance:
H Easy and uniform operation:
-Different programming levels for system user and heating contractor
-Large, clear text LCD display format facilitates legibility of all data
-Illuminated operating mode and heating circuit keys
-Easy-to-program switching times
-Digital tracking of day and week. Programmed times for domestic hot water production and recirculation pump is adjusted automatically when heating program is altered.
-Plug & Work quick-connect system for automatic sensor/system recognition and adaptation
-Automatic resetting to daylight savings time
-Service interval display for demand-related maintenance
-Fuel consumption display
H Program selection for controlled drying of concrete floor in radiant floor heating application
H Short installation time, start-up and maintenance due to Rast-5 connector system, plug-in function modules and integrated diagnostic system
Vitotronic 300, Model KW3
OTS
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HWeather-responsive indoor/outdoor, digital boiler and heating system control:
-for heating systems with one boiler
-for heating systems with one direct-connected heating circuit and up to two mixing valve circuits
-for single-stage, two-stage and modulating burners
-with DHW tank temperature sensor
-with digital tracking of day and week
-with separate switching times for space heating, domestic hot water heating and recirculation pump
-with integrated diagnostic system
Standard Equipment
Vitotronic 300, Model KW3 (Part No. Z001 231)
with
H operating module with clear text LCD display
H outdoor temperature sensor
H boiler water temperature sensor H DHW tank temperature sensor H Power/Pump Module
For a heating circuit with a mixing valve, a mixing valve actuator accessory kit is required. Due to the low return water temperature of condensing boilers only 3-way mixing valves should be installed. For non-condensing boilers, such as Vitogas 100, Vitorond 200 and Vitola 200, a 4-way mixing valve may be used. The circulation pump with a flow check valve for DHW tank temperature control must be ordered separately.
Heating system with underfloor heating
The underfloor heating circuit requires an accessory kit for operation with a mixing valve.
A temperature control with high limit must be installed into the flow of the radiant floor heating application.
The underfloor heating circuit must not be controlled by a remote control with room temperature sensor.
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WARNING |
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When extending wire, there is the |
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possibility of exposure to |
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electromagnetic interference. |
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Avoid running wires beside or near |
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high voltage 120/240 VAC |
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conductors. If proximity to high |
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voltage conductors cannot be |
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avoided, use stranded, twisted pair |
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or shield design wire. Ensure that |
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only one end of the shielding is |
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Application |
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grounded. |
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Fuel |
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Minimum boiler water |
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In conjunction with the following Viessmann boilers |
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Boiler Model and Series |
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temperature |
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without low |
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with low limit |
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limit |
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(average temp.) |
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Oil-/gas-fired hot water |
Vitola 200 |
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Oil/Gas |
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x |
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heating boiler with power |
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burner |
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Atmospheric |
Vitogas 050, RS Series |
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Gas |
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120 ºF / 49 ºC |
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gas-/propane-fired hot |
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water heating boiler |
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Atmospheric gas-fired |
Vitogas 100, GS1 up to 240 MBH / 70 kW |
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Gas |
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104 ºF / 40 ºC |
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hot water heating boiler Vitogas 100, GS10 up to 380 MBH / 111 kW |
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Gas |
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120 ºF / 49 ºC |
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5265 533 v1.4
2
Structure and Operation
Structure and Operation
Modular structure
The complete control consists of a control base, control unit (electronic operating modules), and a Power/Pump Module.
The control unit comprises:
Power on/off switch, an electronic high limit, a temperature gage and a low temperature control
-adjustable high limit
-fixed high limit
TUV test switch, override switch, buttons for:
-holiday program
-party and economy modes
-reduced operating mode temperatures
-domestic hot water temperature
-programming of heating curves for boiler water temperature, mixing valve circuit temperature
-heating circuit selection,
a selector knob for normal operating temperatures and a digital timer. Heat-demand-controlled circuit pump and burner activation, adjustment option for variable temperature limit, pump cycling, integrated diagnostic system and flue gas monitoring in connection with the flue gas temperature sensor (optional) and maintenance display.
Boiler-specific functions
The Vitotronic control modulates the boiler water temperature.
It gradually regulates the boiler water temperature (= the supply water temperature of the direct-connected heating circuit) as well as the supply water temperature of a mixing valve circuit. The control contains an adaptive tank temperature control logic with priority switching (heat pump off, mixing valve closed).
An additional function for domestic hot water heating (short-term heating to an increased temperature) can be selected.
5265 533 v1.4
The Vitotronic 300 is an ideal control option for your heating system with mixing valve circuit. It is the perfect solution for your underfloor heating circuit with supply and return water temperature sensor or for controlled drying of a concrete floor.
Control characteristics
-Boiler circuit control unit (high temperature)
-Heating circuit control with mixing valve
-Dead band: ±1.80 ºF / 1 ºC
-Adjustable high limit factory default
setting: |
167 ºF / 75 ºC |
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adjustable to |
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205 ºF / 96 ºC |
- Fixed high limit: |
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230 ºF / 110 ºC |
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adjustable to |
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212 ºF / 100 ºC |
- Adjustment range of heating curve: |
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Slope: |
0.2 to 3.5 |
Shift: |
– 23 ºF to +72 ºF |
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– 13 ºC to +40 ºC |
High limit: |
68 to 266 ºF |
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20 to 130 ºC |
Low limit: |
34 to 261 ºF |
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1 to 127 ºC |
Differential temperature for heating circuit with mixing valve:
0 to 72 ºF
0 to 40 ºC
-Adjustment range for domestic hot water setpoint temperature:
50 to 140 ºF
10 to 60 ºC, adjustable to 50 to 203 ºF 10 to 95 ºC
Technical data |
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Rated voltage: |
120 VAC |
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Rated frequency: |
60 Hz |
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Rated current: |
6 A |
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Power consumption: |
5 W |
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Maximum ambient |
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temperature |
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- at operation: |
32 to 104 ºF |
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0 to |
40 ºC |
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(in rooms and |
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installation sites |
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with normal |
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ambient |
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conditions) |
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- when storing or transporting: |
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–4 to +149 ºF |
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–20 to |
+65 ºC |
Relay output rating in conjunction with a Power/Pump Module:
- Heating circuit |
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pump : |
3 FLA / 120 VAC*1 |
-Circulation pump for DHW tank
heating |
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3 FLA / 120 VAC*1 |
- DHW recirculation |
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pump |
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3 FLA / 120 VAC*1 |
- Compiled fault |
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indicator |
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3 FLA / 120 VAC*1 |
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- Burner plug |
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2 FLA / 120 VAC |
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Two-stage burner |
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plug |
*2: |
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0.5 FLA / 120 VAC |
-Power supply to Power/Pump
Module: |
max. 12 A / |
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120 VAC |
*1Total 9 A / 120 VAC
*2Available only with extension module for two-stage burner (included in boiler package).
Boiler coding card
For adapting the control to the heating boiler and the respective heating system characteristics (included in boiler package).
Connections
-Sensors, burner and Power/Pump Module are connected to the back of the control unit via system plugs.
-Pumps and power supply are connected to the Power/Pump Module via screw terminals or system plugs.
-Mixing valve pumps and mixing valve supply sensors are connected to the mixing valve controller. The mixing valve controller receives power from a separate power source and communicates with the Vitotronic via the 2-wire KM-BUS.
Operating unit
-With digital timer
-Clear text LCD display
-Temperature and error message display
-Coding via display of operating unit
-All adjustments and basic coding information in clear text
3
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