Summary of the content on the page No. 1
T6570, T8570 Series
Digital Fan-Coil Thermostats
PRODUCT DATA
FEATURES
• Simple user interface.
• Attractive modern styling ideal for offices or hotels.
• Digital display of ambient temperature, with user
activated temperature display.
• Digital display shows mode icons when cooling or
heating relays operate, or when energy savings mode
is active.
• Push button setpoint adjustment.
• Switches allow manual control of system operation
and fan speed.
• Energy savings mode - externa
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T6570, T8570 SERIES DIGITAL FAN-COIL THERMOSTATS SPECIFICATIONS Table 1. Applications Features Switches Control Number Energy Fan Auto 3-Speed 2-Pipe 4-Pipe of Savings On/ Changeover Remote On/Off Fan Heat/ Wiring Models Voltage Fan Coil Fan Coil Relays Input Auto Deadband Adjust Sensor (SPST) (SP3T) Cool Diagram 2 T6574B • 1 • • • • Fig. 6 120V, 1 • 1 • • • • Fig. 7 3 • 1 • • • Fig. 8 208~ 277V, T6575B • 2 • • • • Fig. 9 • 2 • • • • Fig. 10, 13 50 - T6575C 60 Hz • 2 • • • • Fig
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T6570, T8570 SERIES DIGITAL FAN-COIL THERMOSTATS Energy Savings Input: 24 Vdc dry contact, maximum resis- Table 2. Electrical Rating tance of 1000 ohms. Note 'Caution', page 3. 50-60 Hz 24V 120V 208V 230V 277V Protection Class: IP30. Amps (Resistive) 3.8 3.8 3.8 3.8 3.8 Approvals: CSA Certified C/US LR158158 for Canada and 1 Full Load Inductive 3.0 3.0 3.0 3.0 3.0 the U.S.A. Meets CE requirements. Pilot Duty 100 VA Accessories: Adapter plate for mounting on single- or double- 1 Equiva
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40007507-001 T6570, T8570 SERIES DIGITAL FAN-COIL THERMOSTATS 3. Use both hands to pull the thermostat straight away from Mounting the wallplate. Any T6570, T8570 series thermostat can be mounted directly on the wall on a 65x65mm junction box, or a 2"x4" horizontal junction box. An optional adapter plate is available for mounting on a 4"x4" or vertical junction box. (See Fig. 2) Mounting screws are supplied for alternatives. 1 2 1. Feed leadwires through wiring access hole of wallp
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T6570, T8570 SERIES DIGITAL FAN-COIL THERMOSTATS OFF MODE When the system switch is set to Off, power is removed from SINGLE STAGE COOLING C the thermostat electronics and output terminals, and the 23.0 PROPORTIONAL 22.5 display will go blank. The thermostat will reboot when power is BAND 22.0 restored with the On/Off switch. 21.5 21.0 USER NOTE: This On/Off switch is a functional switch and should 20.5 1 SETPOINT 20.0 not be used as an isolating switch. 1 USER SETPOINT CHANG
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T6570, T8570 SERIES DIGITAL FAN-COIL THERMOSTATS Installer Setup Mode Table 4. Energy Saving Mode Default Settings The thermostat allows many of its operating parameters to be adjusted via an Installer Setup Mode. Each operating Energy Savings Mode – Setpoints parameter has a two-letter identifier code, which is shown on Heating Setpoint Cooling Setpoint the display during the Installer Setup Mode programming Description Default Range Default Range sequence. A description of these is s
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T6570, T8570 SERIES DIGITAL FAN-COIL THERMOSTATS Table 5. Thermostat Parameter Options °C Scale °F Scale Parameter ID Description Default Values Default Values Temperature Scale tS Allows selection of either °C or °F scale Yes – No – Dead Band db Setting deadband (Zero Energy Band) 2 2, 3, 4 4 3, 4, 5 Heat or Cool OP Setting operating mode on single relay, 0 0: cool 0 0: cool Operating Mode non-changeover models, to either Heat 1: heat 1: heat or Cool Unoccupied Cooling uC Program unocc
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T6570, T8570 SERIES DIGITAL FAN-COIL THERMOSTATS Fig. 10. Wiring 4-pipe, heat/cool with manual heat/cool changeover switch, continuous fan. Fig. 7. Wiring 2-pipe heat-only thermostat with fan On/Auto switch. Fig. 11. Wiring 4-pipe, auto heat/cool changeover. Fig. 8. Wiring 2-pipe seasonal heat/cool changeover with external aquastat, fan On/Auto switch. Fig. 12. Wiring 4-pipe, auto heat/cool changeover, with fan On/Auto switch. Fig. 9. Wiring 2-pipe heat/cool with manual heat/cool changeo
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T6570, T8570 SERIES DIGITAL FAN-COIL THERMOSTATS Fig. 13. Wiring 4-pipe, heat/cool with manual heat/cool changeover switch, cycled fan, using external relay. Fig. 16. Wiring 2-pipe 24V heat thermostat with fan On/ Auto switch. Fan-Relay Control Center T8570 thermostats are typically used with load relays to switch line voltage loads. Honeywell offers a convenient fan-relay center, the W6380, that provides 24 Vac power, three interlocked fan relays, and wiring center terminations for val
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T6570, T8570 SERIES DIGITAL FAN-COIL THERMOSTATS T8575D will find the new sensor source and use this for control. To extend the sensor cable, up to a maximum of 70 feet (20m), use only shielded cable. For example, Beldfoil® 18 AWG cable is a suitable cable. The sensor connections are polarity sensitive, so be sure to connect the shielded wire to the sensor blue wire, as shown in Fig. 21 below. Fig. 19. Wiring 4-pipe 24V auto heat/cool changeover with continuous fan. Fig. 21. Wiring optio
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T6570, T8570 SERIES DIGITAL FAN-COIL THERMOSTATS 11 95C-10897–6
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T6570, T8570 SERIES DIGITAL FAN-COIL THERMOSTATS Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 customer.honeywell.com ® U.S. Registered Trademark © 2005 Honeywell International Inc. 95C-10897–6 M.A. Rev. 09-05
