Wolf ZP-3 Installation Instructions Manual page 50

Fault: no DHW circulation
50
Troubleshooting
Possible cause
DHW circulation pump is
not delivering any DHW
Operating mode incorrect-
ly set
Fault remedy
• Vent the DHW circulation line
• Check whether the ball valve on the circulation
pump set is open
• DHW circulation pump is not correctly set; see chap-
ter ZP-3 DHW circulation pump set installation
• Check the non-return valve of the circulation pump
set
• Hydraulic pressure drop too big for DHW circulation
pump – check sizing – fit larger pump if required (on
site)
See chapter ZP-3 DHW circulation pump set installa-
tion
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