Viessmann BWT 221.A06, Installation And Service Instructions Manual, Page: 117 / 124

117
A
Adjustable feet...................................16
Aligning the appliance........................16
Ambient temperatures........................16
Appliance fuse...................................76
Appliance too noisy............................77
Assembly...............................26, 78, 92
B
Brine pressure switch.........................49
Buffer temperature sensor.................76
C
Casing assembly..........................80, 94
Checking
■ Fuse................................................76
■ Sensors..........................................75
Checking sensors..............................75
Checking the expansion vessel.........57
Checking the fuses............................76
Checking the pressure.......................57
Checking the refrigerant circuit for
leaks...................................................53
Checking the system pressure...........57
Check valve.......................................31
Cleaning the cylinder.........................57
Coding level 1....................................59
Commissioning............................52, 60
Commissioning assistant...................59
Compressor
■ Power supply 230 V~.....................44
■ Power supply 400 V~.....................44
Conditions of site...............................16
Connection
■ At control unit..................................34
■ Cooling circuit.................................32
■ DHW...............................................31
■ Overview...........................................7
■ Primary circuit.................................29
■ Secondary circuit......................29, 30
Connection conditions
■ Power supply utility.........................46
Connections
■ Electrical.........................................32
■ Hydraulic.........................................29
■ Preparing..........................................8
■ Primary circuit.................................30
Connection set...................................30
Connections on the DHW side...........31
Connection values
■ Circulation pumps...........................39
■ Function components...............37, 39
Contact humidistat.............................32
Controller PCB...................................41
Control parameter reports................106
Control unit
■ Connections....................................34
■ Controller and sensor PCB.............41
■ Expansion PCB..............................39
■ Luster terminals..............................39
■ Main PCB.......................................36
■ Removing.......................................18
Cooling circuit....................................32
Corrosion damage.......................58, 59
Curve
■ Temperature sensor type Ni 500....76
■ Temperature sensor type Pt 500....76
Cylinder
■ Cleaning.........................................57
■ Drain & fill valve..............................75
■ Specification.........................112, 115
Cylinder assembly......................90, 102
Cylinder module
■ Fitting..............................................26
■ Removing.......................................18
Cylinder temperature sensor..............76
D
Declaration of Conformity................116
DHW circulation pump.................31, 63
Diaphragm grommet..........................29
Dimensions..........................................7
Drain & fill valve.................................75
Draining, secondary heat pump side. 75
Keyword index
Keyword index
5601 574 GB