Overview Of Internal Components, Type Ww 301.B125 To Ww 302.B300 - Viessmann KWT Vitocal 300-G Pro Installation And Service Instructions Manual

Repairs
(cont.)

Overview of internal components, type WW 301.B125 to WW 302.B300

9
1
qO qI
Fig.44
wP qW/qE 2/3/4/5
wE
qU
qT
qZ
qI
qR
Fig.45
1 Wiring chamber
Safety high pressure switch, high pressure 1 (Stage 1)
2
Only type WW 302.B125, WW 302.B155, WW 302.B200, WW 302.B250, WW 302.B300:
3
Safety high pressure switch, high pressure 2 (Stage 2)
High pressure sensor EEV
4
Suction gas temperature sensor EEV
5
Liquid gas temperature sensor EEV
7
Electronic expansion valve EEV
8
9 Only type WW 302.B125, WW 302.B155, WW 302.B200, WW 302.B250, WW 302.B300:
Hot gas temperature sensor EEV 2 / Compressor 2 (Stage 2)
Only type WW 302.B125, WW 302.B155, WW 302.B200, WW 302.B250, WW 302.B300:
qP
Compressor 2 (Stage 2)
Hot gas temperature sensor, compressor 1 (Stage 1)
qQ
Compressor 1 (Stage 1)
qW
Sight glass, oil level, compressor 1 and 2
qE
7 2 34 qQ wW
qP qE qW
wT
8
wQ
wR
5
Troubleshooting
69