Hello,
I'm looking to replace my Horstmann HRT2 with a programmable such as a Horstmann HRt4-B or Danfoss RET-M but I'm a little confused with the current wiring.
The HRT2 datasheet shows:
1 - L (Line)
2 Do Not Use
3 Load Heat
4 N
The current wiring :
1 Brown (multimeter shows 230 Vac)
2 Blue
3 Green/Yellow earth sleeving
4 No cable fitted
Rather concerned by N to terminal 2 where datasheet says not to use.
Boiler is an old Glowworm Space Saver 50, pumped system.
http://www.horstmann.co.uk/download.../ThermoStats/HRT2UserandInstallationGuide.PDF
Anybody able to shed a little light for me?
Many thanks for your time.
I'm looking to replace my Horstmann HRT2 with a programmable such as a Horstmann HRt4-B or Danfoss RET-M but I'm a little confused with the current wiring.
The HRT2 datasheet shows:
1 - L (Line)
2 Do Not Use
3 Load Heat
4 N
The current wiring :
1 Brown (multimeter shows 230 Vac)
2 Blue
3 Green/Yellow earth sleeving
4 No cable fitted
Rather concerned by N to terminal 2 where datasheet says not to use.
Boiler is an old Glowworm Space Saver 50, pumped system.
http://www.horstmann.co.uk/download.../ThermoStats/HRT2UserandInstallationGuide.PDF
Anybody able to shed a little light for me?
Many thanks for your time.