User manual HONEYWELL ST699

[. . . ] ELECTRONIC DUAL ZONE TIMER PRODUCT DATA The ST699 electronic dual zone timer is used to control gravity, primary or fully pumped central heating systems requiring a single 24 hour programme with two ON/OFF periods per day. [. . . ] 2 The ST699 is designed for fixed wiring only and must be wired in accordance with the latest IEE wiring regulations. Ensure the wiring connections to the mains supply is via a fuse rated at not more than 3 A and a Class "A" switch (having contact separation of at least 3 mm in all poles). Remove the terminal cover to allow access to the wiring terminals as shown in fig. 2. Connect the systems wiring as shown by the specific applications wiring diagram. A maximum of two 2. 5 mm2 (cross sectional area) wires can be connected to each terminal as shown in fig. 3. Each wire should be stripped of insulation to a length no greater than 7mm to safeguard against the possibility of electrical shorts. 3 Basic System 1 - without thermostats BOILER Fig. 2 Systems Wiring Basic Wiring DHW ON DHW OFF CH ON CH OFF PUMP CLOCK CLOCK ST699 ST699 *A link must be provided between L-5-8 on the subbase of ST699 for all Sundial Plans, or fully controlled pumped primary systems Basic System 2 - with room thermostat BOILER Basic System 3 - as System 2 except boiler cycling controlled by room thermostat when DHW is switched OFF BOILER FUSE PUMP PUMP ROOM THERMOSTAT ROOM THERMOSTAT CLOCK CLOCK ST699 ST699 3 EN0R 8439 R0 ST699 ELECTRONIC DUAL ZONE TIMER SUNDIAL PLAN WIRING DIAGRAMS Y-Plan ROOM STAT. [. . . ] a pencil) Honeywell Control Systems Limited Newhouse Industrial Estate Motherwell ML1 5SB United Kingdom Helping You Control Your World EN0R 8439 R0 [. . . ]