Viessmann BWT 241.A Series, Installation And Service Instructions Manual

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121
Power-OFF
■ Floating contact connection............41
■ Power supply with load disconnec-
tion..................................................47
■ Power supply without on-site load dis-
connection......................................46
Power-OFF signal..............................46
Power supply
43
■ Compressor 230 V~.......................45
■ Compressor 400 V~.......................45
■ Heat pump control unit.............47, 48
■ Instantaneous heating water heater46
■ Instantaneous heating water heater
230 V~............................................46
■ Recommended power cables...........8
■ With power-OFF.............................46
Pressure gauge..................................30
Pressure gauge connection...............31
Pressure load.....................................16
Pressure reducer...............................31
Primary circuit
■ Connecting.....................................30
■ Filling and venting...........................54
Primary circuit pressure switch..........50
Primary pump settings.......................55
Pt 500.................................................75
Pump
■ Setting the primary pump...............55
Pumps................................................73
Q
Quick-action air vent valve.................30
R
RCD...................................................47
Recommended power cables..............8
Remote control...................................63
Removing magnesium anode............59
Removing programmining unit cover. 72
Repairs...............................................67
Repair work........................................53
Replacing the magnesium anode......59
Reports 106
■ Control parameters.......................106
■ Writing commissioning reports.......53
Required parameter settings
■ For system schemes......................15
Reset button
■ For instantaneous heating water
heater.............................................66
Resistance curves of sensors............75
Ripple control receiver.................47, 48
Room height.......................................17
Room temperature sensor.................76
Room volume.....................................16
S
Safety assembly.................................30
Safety valve...........................30, 31, 32
Sealing faces.....................................26
Secondary circuit
■ Connecting.....................................30
■ Filling and venting...........................55
Selecting the parameter group...........62
Sensor PCB.......................................42
Sensors..............................................73
Service menu
■ Calling up........................................62
■ Disabling.........................................62
■ Enabling..........................................62
Setting parameters.............................62
Shield.................................................77
Short circuit between magnesium anode
and indirect coil............................58, 59
Site conditions....................................16
Siting..................................................17
Solar circuit
■ Connecting.....................................32
■ Filling and venting...........................56
Solar thermal system
■ Parameter settings.........................65
Sound power level...................113, 116
Specification
■ 230 V~..........................................113
■ 400 V~..........................................111
Keyword index
Keyword index
(cont.)
5601 598 GB