I wish to replace a Satchwell TLM2253 with a Horstmann Centaurstat 7 for
a conventional CH system (fully pumped with programmer and 3-port
valve). The existing Satchwell stat (2253) has three wires cabled up to
terminals #1, 3 and #4. Reading its installation manual, #1 and #4 are
Neutral while Live is #3. I gather #4 is for a shunt accelerator heater
because the 2253 uses a bi-metallic strip mechanism ?
How do these map to the Centaurstat terminal block ? Am I correct in
thinking I need only cable up to #1 (Live) and #2 (Neutral) ?
- posted 12 years ago