Installation and Setup
Connect system wiring
1.0- 2.5 mm2 
6 mm max.
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| homexperttm by Honeywell THR840DUK Digital Thermostat | |
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| Wiring diagrams |
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Connect wiring from your heating or cooling | Basic boiler | Combi boiler | ||
equipment to the thermostat as shown at left. |
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See wiring diagrams on pages |
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1 | Make sure electrical power is off. |
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2 | Strip insulation to expose about 6 mm of |
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| bare wire. |
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3 | Use a screwdriver to loosen terminal screw, |
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| insert wire into slot, then tighten screw. |
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4 | Replace thermostat cover, then restore |
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| electrical power. |
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NOTE: All wiring must comply with IEE regulations. Keep AC mains supply/load cables separate from equipment wiring.
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