Viessmann Vitoligno 300-P Service Instructions For Contractors page 85

Repairs
Fuses (for location, see the connection and wiring diagram)
F1:
■ 6.3 A (slow), 250 V
■ Switching capacity H
■ Max. power loss ≤ 2.5 W
■ Appliance fuse
F3:
■ 2.0 A (slow), 250 V
■ Switching capacity H
■ Max. power loss ≤ 2.5 W
■ Pump fuse
High limit safety cut-out
■ Factory-set to 100 °C
■ Electromechanical temperature
switch according to the liquid expan-
sion principle with lockout
■ Intrinsically safe; also lockout in case
of capillary tube leaks or ambient tem-
peratures below −10 ºC
Boiler, buffer cylinder, cylinder and collector temperature sensor
Connection
See chapter "Connection and wiring dia-
gram" from page 121.
F2:
■ 1.6 A (slow), 250 V
■ Switching capacity H
■ Max. power loss ≤ 2.5 W
■ Fuse for the power supply unit, the air
damper drives, the charge and dis-
charge motor and the vacuum module
■ Limits the boiler water temperature to
the maximum permissible value by
shutdown and lockout
■ Central fixing M10, capillary 1000 mm
long; sensor 7 6.5 mm, 65 mm long
■ Electrical test in accordance with VDE
0701 (or local regulations)
Troubleshooting
85