Pump Connection Overview - Viessmann VITOTRONIC300 Installation And Service Instructions Manual

Installation Sequence

Pump Connection Overview

Legend
A 120V pump output
B To the Vitotronic control unit
C Junction box
Rated current: 2A~
* Maximum output 6FLA shared between all
120V outputs.
36
Vitotronic 300, GW2B Installation and Service
Pumps 120V
Available pump connections
sÖM1/A1 Heat circuit pump
(switching contact/shunt pump)
Boiler pump (shunt pump)
sL
sA DHW pump
DHW recirculation pump
sK
Heating circuit M2 pump
sÖM2
sÖM3 Heating circuit M3 pump