Viessmann GC1 Technical Data Manual

5
5604 122 v1.0
Vitotronic 100, KW10B Technical Data
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 With TT demands only

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 Second stage burner demand*

Features

Viessmann GC1 Specifications

General

Brand	Viessmann
Model	GC1
Category	Control Unit
Language	English