Viessmann Vitocal 242-S Installation And Service Instructions Manual page 146

Keyword index
Keyword index
Floor load...........................................23
Floor mounting
■ External unit....................................22
Floor unevenness..............................23
Flow, DHW cylinder/heating water.....41
Flow limiter.........................................54
Flow regulating valve.........................44
Flow temperature sensor
■ For heating circuit...........................14
Flow temperature sensor, cooling cir-
cuit...................................................102
Flow temperature sensor, secondary cir-
cuit...................................................102
Flow temperature sensor, system....102
Free running of the fan, check for......81
Freestanding siting.............................19
Frost stat............................................14
Frost stat, connecting.........................55
Function check...................................92
Function components 230 V~............53
Function components 230 V~......48, 50
Fuse
■ 230 V~ function components..........50
■ AVI PCB...................................50, 58
■ Heat pump control unit...................50
Fuse, checking.................................105
Fuse F1............................................105
Fuse F101........................................105
Fuse F3............................................105
Fuse protection
■ Instantaneous heating water heater
power supply..................................64
■ Power supply, external unit............63
G
Gravel bed
■ As condensate drain.......................23
H
Heat exchanger cleaning...................81
Heating circuit pump....................14, 87
Heating circuit with mixer...................14
Heating circuit with mixer M2.............14
146
(cont.)
Heating circuit without mixer A1.........14
Heating output, compressor...............86
Heating water buffer cylinder.............13
Heating water flow...........8, 41, 42, 140
Heating water return........8, 41, 42, 140
Heat pump, starting............................83
Heat pump control unit.......................13
■ Power cable......................................9
Heat transfer medium........................79
Height differential
■ Internal unit-external unit................33
High limit safety cut-out
■ For solar circuit.........................13, 52
High limit safety cut-out, connecting. .52
High limit safety cut-out reset.............92
High pressure fault.............................18
High tariff meter...........................65, 66
Hot gas line....8, 13, 34, 35, 37, 73, 140
■ Torque......................................36, 40
Hydraulic assembly
■ External unit, type AWT-AC 241.A10
and A13........................................126
■ Internal unit...................................113
Hydraulic connecting chamber...........44
Hydraulic connections..........................8
Hydraulic installation scheme............12
Hydraulic parameters.......................128
I
Immersion thermostat........................14
Impressed current anode...................81
Inspection...........................................71
Installation
■ External unit....................................18
■ Internal unit.....................................23
Installation, external unit
■ Bracket set for wall mounting.........19
■ Supports for floorstanding installa-
tion..................................................19
Installation location requirements
■ External unit....................................18
■ Internal unit.....................................23
Installation room.................................23