Viessmann Vitocal 252-A Series - Page 208

208
Power supply
– Compressor.............................................................92
– General information.................................................87
– Heat pump control unit...................................... 88, 93
– Instantaneous heating water heater........................89
– Outdoor unit............................................................ 92
Premium tariff meter...................................................93
Pressure gauge connection....................................... 54
Pressure points.......................................................... 49
Pressure reducer........................................................54
Pressure resistance
– Testing...........................................................169, 178
Pressure sensor....................................... 140, 141, 149
Pressure sensors, checking..................................... 184
Product information.................................................... 14
Programming unit.....................................................137
Programming unit, fitting............................................ 79
Programming unit, opening...................................... 137
Protective anode, testing..........................................113
Protective equipment............................................... 177
Protective gloves...................................................... 118
Protective magnesium anode...................................114
– Removing.............................................................. 114
– Replacing.............................................................. 114
Pumps.............................................................. 140, 170
Q
Quick action air vent valve....................... 170, 172, 174
Quick-action air vent valve....................................... 181
R
Range of WiFi connections........................................ 47
RCD..................................................................... 87, 93
Recommended power cables.....................................61
Recycling bottles...................................................... 177
Refrigerant ................................................................ 23
– Extracting...................................................... 169, 177
Refrigerant bottle..............................................177, 178
Refrigerant charge................................................... 167
Refrigerant circuit....................... 14, 130, 189, 194, 199
– Filling.............................................................169, 178
– Testing................................................................... 117
Refrigerant detector................................. 166, 168, 179
Refrigerant detectors........................................168, 169
Refrigerant receiver..........................................175, 176
Relay test................................................................. 132
Removing
– EHCU electronics module..................................... 138
– Programming unit..................................................137
Repairs.....................................................................168
Repair work...................................................... 112, 125
Replacing protective magnesium anode.................. 114
Reports.....................................................................185
Reports, compiling..................................................... 96
Requirements.............................................................47
Requirements for installation location
– Outdoor unit............................................................ 29
Reset button.............................................................125
Return
– DHW cylinder.................................................... 18, 19
– Outdoor unit.................................... 18, 19, 20, 21, 22
– Secondary circuit.........................................18, 19, 20
Return temperature
– Secondary circuit...................................................131
Return temperature sensor...................... 140, 141, 151
Ripple control receiver............................................... 93
Room height.........................................................46, 49
Routing cables........................................................... 66
S
Safety check.............................................................167
Safety goggles..........................................................118
Safety valve........................................54, 140, 141, 177
Safety zone........................................................ 30, 177
Screed drying........................................................... 105
Sealed enclosures....................................................168
Seal rings, replacing................................. 111, 116, 142
Secondary circuit
– Draining.................................................................141
Security parameters................................................... 47
Seepage layer............................................................ 33
Self-consumption................................................. 87, 93
Sensor curves.................................................. 151, 182
Sensors............................................ 140, 151, 170, 182
Service menu
– Calling up.............................................................. 128
Servicing work..........................................................165
Shutdown................................................................. 169
Shut-off valve........................................................... 177
Siting.................................................................... 23, 28
– Between walls......................................................... 29
– Indoor unit............................................................... 46
– In recesses..............................................................29
Siting aid.................................................................... 25
Smart Grid..................................................................73
Sound power............................................ 190, 195, 200
Sound propagation.....................................................30
Sound reflections....................................................... 30
Specification.............................................................186
Start sequence, appliance..........................................97
Static vacuum test....................................................177
Subscriber number of connected component.......... 136
Suction equipment................................................... 177
Suction gas pressure............................................... 131
Suction gas temperature.......................................... 131
Suction gas temperature sensor...................... 175, 176
Support.......................................................................33
Support for floorstanding installation..........................27
Switching contact....................................................... 58
System filling.................................................... 106, 113
System pressure.......................................................113
System requirements................................................. 47
System user instruction............................................127
T
Temperature/time profile.......................................... 105
Temperature limiter.................................................... 57
Temperature limiter for floor heating circuits.............. 74
Keyword index
Keyword index (cont.)
6222080