Viessmann VITOTRONIC300 Installation And Service Instructions Manual page 9

Vitotronic 300, GW2B Installation and Service
System Example 1
Equipment required
Pos.
Accessories
Connection to safety equipment aBÖ (see page 43)
qI
Minimum pressure switch or limiter SDB
qO
Maximum pressure limiter SDB
wP
Water level limiter (low water cut-off) WB
wQ
Central fault message system S
wW
Flue gas temperature sensor AGS
wE
Vitotrol 200A or Vitotrol 300A
wR
Contactor relay
wZ
Downstream heating circuit controller, switching contact closed:
wU
Signal for mixing valve "Close"
Extension EA1
eP
1 analog input (0 – 10V)
eQ
- Specification of the set boiler water temperature
3 digital inputs
eW
- External heating program changeover, separately adjustable for heating circuits 1 to 3
- External demand
- External blocking with fault message input
- Fault message input
- Short term operation of DHW recirculation pump
1 switching output (floating changeover contact)
eE
- Switching a feed pump to a substation
- Signalling reduced mode for a heating circuit
External hook-ups
- External demand
eR
- External changeover of stepped/modulating burners
eT
- External blocking/mixing valve closed
eZ
- External changeover of heating program/external mixing valve open
eU
Vitocom 100
eO
KM BUS distributor, for several KM BUS participants
rP
LON communication module for communication with the following components:
rQ
Vitotronic 200-H
(continued)
Description
Preparing for Installation
9