Siemens RWB27Si Single Channel Timeswitch

Siemens (Landis and Staefa) RWB27 Timeswitch

The Siemens RWB27SI Electronic Service Interval Programmer is a single channel service interval timeswitch with one volt free changeover contact that comes from the range of heating controls from acclaimed manufacturer Siemens. The world-leading brand offers functional and reliable products that can achieve massive savings on your heating bills.

• Menu driven programming
• Backlit display
• Simple operation
• 24-hour, 7-day or weekend/weekday program
• Two or three ON/OFFs per day
• Holiday programming
• LED ’ON‘ light
• Advance facility
• Boost facility
• Override facility
• Independent timing for hot water and central heating
• Gravity or fully pumped systems
• Ideal for combi boilers

Replaces (same backplate and wiring for easy swapover):

Landis & Gyr (Landis & Staefa) RWB1, RWB102, RWB2, RWB2.9, RWB40, RWB200, RWB200cw, RWB252, RWB252cw, RWB270, RWB9, RWB-XP.
Microgyr 1, 102, 2, 40, 200, 200cw, 252, 252cw, 270, 9, XP.
Gloworm (Glowworm) MasterMind,
Potterton Miniminder, Miniminder E
Sankey Sunline
Crossling Controller
Wickes RWB2/6832, RWB200.cw, RWB252.cw, RWB2E.cw, RWB9.cw.
Boss Therm RPF7, RP24, BUP.
British Gas EMP1, EMP2, UP1L

Replaces RWB20 / Microgyr 20 (same backplate) but may require the addition of a neutral connection