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Installation and Setup
14
homexpert
tm
by Honeywell THR840DUK Digital Thermostat
15
Connect system wiring
Connect wiring from your heating or cooling
equipment to the thermostat as shown at left.
See wiring diagrams on pages 15-17 for details.
1 Make sure electrical power is off.
2 Strip insulation to expose about 6 mm of
bare wire.
3 Use a screwdriver to loosen terminal screw,
insert wire into slot, then tighten screw.
4 Replace thermostat cover, then restore
electrical power.
1.0 - 2.5 mm
2
6 mm max.
NOTE: All wiring must comply with IEE
regulations. Keep AC mains supply/load cables
separate from equipment wiring.
Wiring diagrams
Basic boiler Combi boiler