Internal H1 Extension; Internal H2 Extension; Am1 Extension - Viessmann Vitodens 300-W Technical Manual

Control units
(cont.)

Internal H1 extension

Part no. 7498 513
Using the extension enables the following functions to be achieved:
Function
– Connection of an external safety solenoid valve (LPG)
And one of the following functions (only for Vitodens 200-W and 300-W):
– Connection of a heating circuit pump (multi stage) for a directly connected heating cir-
cuit
– Connection of a central fault message
– Connection of a circulation pump for cylinder heating
– Only for Vitotronic 200, type HO1B and HO2B:
Connection of a DHW circulation pump
Power supply for DHW circulation pump
DHW circulation pumps with their own internal control unit must be
connected to a separate power supply. Mains connection via the
Vitotronic control unit or Vitotronic accessories is not permissible.

Internal H2 extension

Part no. 7498 514
Using the extension enables the following functions to be achieved:
Function
– External extractor interlock
And one of the following functions (only for Vitodens 200-W and 300-W):
– Connection of a heating circuit pump (multi stage) for a directly connected heating cir-
cuit
– Connection of a central fault message
– Connection of a circulation pump for cylinder heating
– Only for Vitotronic 200, type HO1B and HO2B:
Connection of a DHW circulation pump
Power supply for DHW circulation pump
DHW circulation pumps with their own internal control unit must be
connected to a separate power supply. Mains connection via the
Vitotronic control unit or Vitotronic accessories is not permissible.

AM1 extension

Part no. 7452 092
Function extension inside enclosure for wall mounting.
Using the extension enables up to two of the following func-
tions to be achieved:
■ Switching the DHW circulation pump (only with Vitotronic 200,
type HO1B and HO2B)
■ Switching of heating circuit pump for a directly connected heating
circuit
■ Switching the circulation pump for cylinder heating (not for boilers
with integral DHW cylinder)
7
Power supply for DHW circulation pump
DHW circulation pumps with their own internal control unit must be
connected to a separate power supply. Mains connection via the
Vitotronic control unit or Vitotronic accessories is not permissible.
VIESMANN
106
PCB for installation in the control unit.
Rated breaking capacity of the relay output
Specification
Rated voltage 230 V~
Rated frequency 50 Hz
PCB for installation in the control unit.
Rated breaking capacity of the relay output
Specification
Rated voltage 230 V~
Rated frequency 50 Hz
0
1 8
5 8
1(0.5) A 250 V~
2(1) A 250 V~
6(3) A 250 V~
2(1) A 250 V~
VITODENS