Viessmann Vitotronic 300 Installation And Service Instructions Manual page 8

Preparing for Installation
System example
Technical Data
Equipment required
Pos. Designation
Accessories
qI Connection to safety equipment aBÖ (see page 20)
Minimum pressure switch or limiter SDB
qO
Maximum pressure limiter SDB
wP
Low water cutoff
wQ
Central fault message system
wW
Vitotrol 200A or Vitotrol 300A
wR
As an alternative to hardwired remote control units, the following wireless accessory may be used
Extension EA1
eP
1 analogue input (0–10V)
eQ
Specification of set boiler water temperature
3 digital inputs
eW
External heating program changeover, separate adjustment for heating circuits 1 to 3
External demand
External blocking with fault message input
Fault message input
Brief operation of the DHW circulation 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 blocking/mixing valve closed
eZ
External heating program changeover/External mixing valve open
eU
KM BUS distributor, for several KM BUS participants
rP
LON communication module for communication with the following components:
rQ
Vitotronic 200-H for regulating additional heating circuits
rW
Vitocom 100, type LAN1
rE
On-site power supply with disconnect and protection 120V 60 Hz
rRX
8
(continued)
Vitotronic 300, GW5B Installation and Service