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5693 982 - 04
Vitotronic 300, GW2B Installation and Service
Preparing for Installation
System Example 4
(continued)
Equipment required
Pos. Description
qI
Connection to safety equipment
aBÖ
(see page 43)
qO
Minimum pressure switch or limiter SDB
wP
Maximum pressure limiter SDB
wQ
Water level limiter (low water cut-off) WB
wW
Central fault message system S
wE
Flue gas temperature sensor AGS
wR
Vitotrol 200A or Vitotrol 300A
eP
Extension EA1
eQ
1 analog input (0 – 10V)
- Specification of the set boiler water temperature
eW
3 digital inputs
- 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
eE
1 switching output (floating changeover contact)
- Switching a feed pump to a substation
- Signalling reduced mode for a heating circuit
External hook-ups
eR
- External demand
eZ
- External blocking/mixing valve closed
eU
- External changeover of heating program/external mixing valve open
eO
Vitocom 100
rP
KM BUS distributor, for several KM BUS participants
rQ
LON communication module for communication with the following components:
Vitotronic 200-H
