Viessmann Vitotronic 100 Technical Manual 5604 122 V1.0

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Technical Data Manual
VITOTRONIC 100
Digital boiler control unit
for modulating temperature heating systems

Vitotronic 100
Model KW10B, Part No. 7834 238
Digital boiler control
With outdoor reset control
For heating systems with one modulating temperature
heating circuit (without mixing valve)
With analog boiler water temperature display
Integrated pump connections
Viessmann quick-connect plug-in system
OpenTherm functionality

Certified as a component
part for Viessmann boilers
5604 122 v1.0 07/2011

Vitotronic 100, KW10B Technical Data

Product Information
The benefits at a glance:

Standard equipment:

digital boiler control

Vitotronic 100, Model KW10B with;

space heating circuit controlled by room thermostat
and outdoor reset logic

adjustable fixed high limit
power supply cord

single-stage or two-stage boiler control
(depending on burner)

outdoor temperature sensor

integrated diagnostic system

boiler temperature sensor

built-in boiler low temperature protection

DHW temperature sensor

short assembly time and start-up due to diagnostic
and wire terminals

120VAC boiler pump and DHW pump outputs

digital boiler control:
- for single-boiler systems
- outdoor reset control
- for heating circuits without mixing valves
- for single-stage or two-stage burner
- with analog temperature display
- with integrated diagnostic system

Application
Fuel

Minimum boiler water temperature

Oil-fired hot water
heating boiler with
power burner

Vitorond 100

Oil

Oil-/Gas-fired hot water
heating boiler with
power burner

Vitola 200

Oil/Gas

Atmospheric gas-/
propane-fired hot water
heating boiler

Vitogas 050, RS Series (single-/
two-stage)

Gas

120º F (49º C)

Atmospheric gas-fired
hot water heating boiler

Vitogas 100, GS1 Series,
up to 240 MBH/70 kW

Gas

104º F (40º C)

Vitogas 100, GS10 Series,
up to 380 MBH/111 kW

Gas

120º F (49º C)

without low limit with low limit (average temp.)
104º F (40º C)

x

5604 122 v1.0

2

In conjunction with the following Viessmann boiler
Boiler Model and Series

Vitotronic 100, KW10B Technical Data

Structure and Operation
Functionality Overview

Modular structure

-

outdoor reset functionality with the ability to connect
to room thermostat demand type connection

-

reset curve adjustments with rotary dial settings as
well as WWSD adjustments

-

integrated DHW control and pump output adjustable
set point with rotary dial settings

The control unit consists of:
System ON/OFF switch, analog temperature display and
override switch.
- adjustable high limit (type RAK 51.1/3382, Mfg. Etheco
or type TR 97.55180.251, Mfg. EGO)
-

fixed high limit (type RAK 75.4/3412, Mfg. Etheco
or type STW 56.10525.400, Mfg. EGO)

-

electronic circuit board with power supply and
integrated outdoor reset function

relay test functionality
pumps: DHW and boiler
burner: 1st and 2nd stage
alarm output

-

integrated diagnostic system (power, burner call and
fault indicators)

-

LON addressing with rotary dial settings

-

multi-boiler operation when used in conjunction with
Vitocontrol-S MW1 cascade control

-

minimum boiler protection

-

two stage burner operation

-

compiled fault output (dry contact) and LED indicators

The Vitotronic 100 control unit controls the boiler
temperature according to heat demand input (room
thermostat connections) or the calculated outdoor reset
set point.
Boiler water temperature is limited through the adjustable
aquastat. Minimum boiler water temperature protection is
achieved with the built-in pump aquastat and the outdoor
reset control.

-

0-10VDC BMS set point control

-

-

operational DHW settings with DIP switch settings;
- DHW priority
- DHW post purge time

Boiler-specific functions

Electronic boiler control
Options
With optional OT thermostat via digital two wire
communication, providing local or remote user interface
-

DHW set point adjustment and time scheduling

-

outdoor reset adjustment and time scheduling

-

slope, daytime/night time settings

-

boiler status and temperature displayed on thermostat

-

can be installed within living space or adjacent to boiler

-

single boiler systems

-

heating circuits without mixing valves

-

single and two stage burners

-

anolog temperature display

5604 122 v1.0

With optional LON communication module
-

communications to Vitotronic 050, HK1M mixing valve
controls

-

communications to Vitocontrol-S, MW1 cascade control

-

enables connection with extension output module

-

BACnet communications utilizing Versatronik 505,
BACIP

3

Vitotronic 100, KW10B Technical Data

Structure and Operation

(continued)

BOILER TEMPERATURE

Heating curve

OUTDOOR TEMPERATUIRE

Technical data
Power: 120 VAC, 1 Phase, 60 Hz, 15A pre-fuse
Burner switching capacity: 120 VAC, 2.5A (full load)
Room thermostat: 24 VAC
Anticipator setting: 0.1 A
Fixed high limit: 230° F (110° C) max. (fixed)
Adjustable high limit: 167° F to 239° F max.
(75° C to 115° C) max. (adjustable)
Boiler & DHW Pump output: 120 VAC, 1 Phase, 60 Hz,
3A (full load)
Outdoor temperature sensor: 5k Ohms at 77° F (25° C)
max. wire length up to
95 ft. (35 m)
Boiler temperature sensor: 10K
DHW temperature sensor: 10K
Main fuse: 6.3A
Certification: CSA certified in conjunction with Viessmann
boilers

4

5604 122 v1.0

Main pump output fuse: 6.25A

Vitotronic 100, KW10B Technical Data

Features
Function

Description

KW10B KK10

KW10

KK10LON

120VAC Power connection

Control Power









Boiler Pump

120V output for boiler pump



DHW Pump

120V output for DHW pump









Burner connection

Harness connection for burner



Low Water Cut-off

Powers LWCO device









Outdoor Temperature Sensor

5K ohm sensor



Boiler Temperature Sensor

10K ohm sensor









DHW Temperature Sensor

10K ohm sensor



TT Stage 1

Call for heat first stage

TT Stage 2

Call for heat second stage









OpenTherm Communication

OT connection for OT enabled room
thermostat/device










Fault Output

Compiled Fault Indication Dry Contact



0-10VDC Input/Ext Demand

Coded function either 0-10VDC or
external demand



Lon Communications

Daisy-chained LON connection when
optional LON board installed



Override Switch

Mounted on face of control



Diagnostic LED Sensor Flash

Flash based on sensor issue





Power Switch









Pump Aquastat min. temp. control



















Electronic minimum temperature control
External pump module



Integrated pump boiler and DHW pump
connection



Relay Test



Selectable boiler pump operation based
on TT demand or continuous operation



Electronic DHW set point control



DHW Priority Override Timer



Front Panel mounted AHL and FHL









Front panel mounted analog
temperature gauge









All relays with sockets with locking tabs



Field replaceable motherboard no hardwired PCB connections



Second Stage

5604 122 v1.0

With TT demands only

Second stage burner demand*



5

Vitotronic 100, KW10B Technical Data

Connections

Function

Connection Description

120VAC power connection

40

control power

Boiler pump

20

120VAC output for boiler pump

DHW pump

21

120VAC output for DHW pump

Burner connection

41

harness connection for burner

Second stage

191

second stage burner demand

Low water cut-off

LWCO

powers LWCO device

Outdoor temperature sensor

1

5K ohm sensor

Boiler temperature sensor

3

10K ohm sensor

DHW temperature sensor

5

10K ohm sensor

TT stage 1

call for heat first stage

TT stage 2
OpenTherm communication

call for heat second stage
OT

OT connection for OT enabled room thermostat/device

Fault output

AL

Compiled fault indication

0-10VDC input/ext demand

A1

coded function either 0-10VDC or external demand

LON communications

C1/C2

Daisy-chained LON connection when optional LON board installed

Terminal connections

6

5604 122 v1.0

- screw-type connection
- RAST-5 quick connects
- Low voltage sensor and communication screw type
connections

Vitotronic 100, KW10B Technical Data

Accessories
Boiler water / DHW temperature sensor

Outdoor temperature sensor

Cable length: 5.2 ft. (1.6 m), ready to plug in.

Installation site: North or northwest side of building
6.6 to 8.2 ft. (2 to 2.5 m) above ground,
for multi-storey buildings mount sensor
on upper half of second storey.

Maximum ambient temperature
-

at operation: (in rooms and installation sites with
normal ambient conditions) 32 to 104 ºF (0 to 40 ºC)

-

when storing or transporting:
-4 to +149 ºF (-20 to +65 ºC)

5604 122 v1.0

Minimum boiler temperature protection and freeze-up
-

controlled by electronic boiler temperature sensor

-

DIP switch enabled/disabled

Connection: 2-wire cable, cable length 1000 ft. (300 m)
with a wire size of min. AWG 16 copper.
The cable to the outdoor sensor must not be laid near line
voltage wiring (120/240 V).
Maximum ambient temperature at operation, when storing
or transporting:- 40 to +158 ºF (- 40 to +70 ºC)

7

Vitotronic 100, KW10B Technical Data

Viessmann Manufacturing Company (U.S.) Inc.
45 Access Road
Warwick, Rhode Island · 02886 · USA
1-800-288-0667 · Fax (401) 732-0590
www.viessmann-us.com · info@viessmann-us.com

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Viessmann Manufacturing Company Inc.
750 McMurray Road
Waterloo, Ontario · N2V 2G5 · Canada
1-800-387-7373 · Fax (519) 885-0887
www.viessmann.ca · info@viessmann.ca

Technical information subject to change without notice.

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Printed on environmentally friendly
(recycled and recyclable) paper.

Quick Reference



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