Honeywell Sundial RF2 1-CHANNEL Hot Water Pack 4 Y9120W1000

Ideal for adding a hot water timer and cylinder thermostat to new and existing Sundial systems, or upgrading a gravity hot water system. Energy saving TPI (Time Proportional & Integral control) Wireless enabled upgrade Two way wireless communication Wireless signal strength indicator Built in Economy or Comfort programmes on ST9120C Line of Text display for easy programming on ST9120C ST9120C fits on industry standard backplate ST9120C is a direct replacement for ST9100 and ST6100 models CS92A controlled from timer Battery powered CS92A – no wiring