Viessmann Vitocrossal 300 Service Instructions For Contractors page 47

Further details regarding the individual steps
ID: 4605302_1006_01
Pos. Description
Components:
rW/tW Mixer PCB and flow temperature sensor (contact temperature sensor)
rT/tT
Mixer motor M2/M3
tE Temperature limiter for an underfloor heating circuit
rR/tR Heating circuit pump M2/M3 and 3-way mixer
or
Divicon
Accessories (optional)
5 Internal extension H1:
■ Connection, external safety solenoid valve (LPG)
■ Central fault message (alternative to extension EA1)
6 Internal extension H2:
■ External extractor interlock
■ Central fault message (alternative to extension EA1)
7 Extension EA1
zP
External safety solenoid valve for LPG (required internal extension H1)
zQ Interlock, extractor fan (requires internal extension H2)
zW Central fault message
zE External hook-up: (Requires extension EA1)
■ External blocking
■ External demand
■ External heating program changeover
zR External set value 0 to 10 V (requires extension EA1)
zT Vitotrol 200A
zZ Vitotrol 300A
zU Radio clock receiver
zI KM BUS distributor, for several KM BUS subscribers
KM BUS subscriber:
■ Extension EA1 7
■ Vitotrol 200A zT
■ Vitotrol 300A zZ
■ Vitocom 100 uP
■ Solar control module, type SM1 wZ
uP Vitocom 100, type GSM
or
zO Vitocom 200, type GP1
Commissioning, inspection, maintenance
(cont.)
47