Danfoss TP4 User & Installation Instructions Manual page 6

Wiring
GB
!
Some existing thermostats wil
have a Neutral wire and/or
Earth wire connected. These are
not required by the TP4/5 and
must NOT be connected to any
TP4/5 terminals. Instead they
should be made electrically safe
and coiled in the recess at the
back of the TP4/5.
6