Viessmann VITOTRONIC300 Installation And Service Instructions Manual page 27

Vitotronic 300, GW2B Installation and Service
System Example 4
Equipment required
Pos.
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
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 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
27