Viessmann VITOCAL 222-S Installation And Service Instructions Manual page 83

Internal unit hydraulics
Pos. Part
0001 Back panel, lower casing
0002 Bottom panel
0003 Angle profile, lower casing, left
0004 Angle profile, lower casing, right
0005 Top panel, lower casing
0006 Retaining rail
0007 Insulation, bottom panel
0008 Connection line, heating water flow/return
0009 Pipe bend, DHW flow
0010 Hose, heating water return
0011 Pipe bend, heating water return
0012 Instantaneous heating water heater with high limit safety cut-out
0013 Connection, instantaneous heating water heater – secondary pump
0014 Line, heating water return (heat meter adaptor)
0015 Adjustable feet (4 pce)
0016 Pipe connector
0017 Locking ring fitting
0018 High efficiency circulation pump with PWM control
0019 Pipe connector
0020 3-way diverter valve
0021 Lower hinge section for casing door
0022 Upper hinge section for casing door
0023 Air vent valve G
0024 Threaded pipe clip
0025 Threaded pipe clip
0026 Threaded pipe clip
0027 Condenser assembly
0028 Fastening UNF for hot gas line
⅞
0029 Fastening UNF for liquid line
⅝
0030 Pressure sensor (ICT)
Valve body ⁷⁄₁₆
0031
0032 Schrader valve
0033 Spring clip
0034 O-ring 28 x 2.5 mm
7
0035 O-ring 34 x 2.0 mm
7
0036 Union nut G with sealing cap
¼
0037 Union nut UNF for hot gas line
⅞
0038 Union nut UNF for liquid line
⅝
0039 Temperature sensor Pt500A
0040 Diaphragm grommet
0041 Screws (set)
0042 Gasket A 21 x 30 x 2.0 mm
0043 Spring clips (set)
0044 Solder connections (set)
(cont.)
⅜
21 to 23 mm, M8, with EPDM insert
7
26 to 28 mm, M8, with EPDM insert
7
31 to 35 mm, M8, with EPDM insert
7
70/21 (external/internal)
7
Parts lists, internal unit
83