Viessmann Vitotwin 300-W Installation And Service Instructions For Contractors page 21

Preparing for installation
Pos. Designation
tW
Flow temperature sensor, heating circuit M2
tE Heating circuit pump, heating circuit M2
tR 3-way mixer
or
Divicon (with 3-way mixer and heating circuit pump)
zP Heating circuit 3 with mixer (and plate heat exchanger for system sep-
aration)
zQ Extension kit for one heating circuit with mixer with integral mixer motor
and
zW Flow temperature sensor, heating circuit M3
zE
Heating circuit pump, heating circuit M3
zR 3-way mixer
or
Divicon (with 3-way mixer and heating circuit pump)
zZ Plate heat exchanger for system separation
Accessories (optional)
uP
Vitocom 100, type GSM
uQ Central fault message (requires extension EA1)
uW External set value 0 to 10 V (requires extension EA1)
uE External hook-up: (Requires extension EA1)
■ External blocking
■ External demand
■ External operating program changeover
uR Radio clock receiver
no pos. Wireless repeater for wireless remote control
no.
Installation of the Vitotwin 300-W with
the supplied sub-mounting kit:
Sub-mounting kit installation
instructions
(cont.)
Preparing for installation
21