Viessmann VITOCAL 222-S Installation And Service Instructions Manual page 13

System example, ID: 4605418_1202_02
Pos. Designation
Heat source
1 Internal unit, heat pump, Vitocal 222-S, type AWT-AC 221.A
2 Heat pump control unit Vitotronic 200, type WO1C
3 Outside temperature sensor ATS
4
Instantaneous heating water heater with switching module (integral)
5 3-way diverter valve "Heating/DHW heating" (integral)
6 Secondary pump (integral)
qW
Safety assembly
8 KM BUS distributor (accessories)
qE Heating circuit expansion vessel
qT Flow switch
Primary circuit
wU Hot gas line
wI
Liquid line
wO External unit of the heat pump Vitocal 222-S
DHW heating
eP DHW cylinder (integral)
eQ Cylinder temperature sensor STS (integral)
eU DHW circulation pump ZP (accessories)
zP Heating water buffer cylinder
zQ Buffer temperature sensor PTS
Heating circuit with mixer M2/HC2 (KM BUS)
uP Underfloor heating circuit/cooling circuit
uQ Vitotrol remote control
uE Flow temperature sensor
uR Temperature limiter to restrict the maximum temperature of underfloor
heating systems
■ as immersion thermostat
or
■ as contact thermostat
uZ Heating circuit pump
uU 3-way mixer, heating circuit
Mixer motor of the 3-way mixer
q-T Mixer extension kit
Active cooling function AC
qI Frost stat 230 V
iE Contact humidistat 230 V
iO 3-way diverter valve for "heating/cooling"
Preparing for installation
(cont.)
13