Honeywell T8570 Manual Do Utilizador

40007507-001 

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.   Feed leadwires through wiring access hole of wallplate 

and adaptor plate (if used). 

2.   Attach supply wires using wire nuts (not provided), or 

screw terminals, as appropriate. 

3.   Locate wallplate in the horizontal mounting position. See 

Fig. 2 if using the vertical junction box adapter plate. 

4.   Push leadwires into electrical junction box and attach 

wallplate to box using machine screws provided in the 

appropriate mounting holes. 

5.   Attach thermostat to wallplate: 

a.   Locate the two center side holes on the back of the 

thermostat. 

b.   Align the holes with the two wallplate side tabs. 

c.   Press down firmly to snap thermostat into place. 

M17505 

Improper removal can damage the thermostat. 

Carefully follow the thermostat removal directions. 

If it is necessary to remove the thermostat from the wallplate 

(see Fig. 3): 

1.   Use a screwdriver to pry thermostat left side away from 

the base. 

2.   Use the screwdriver to pry thermostat's right side away 

from the wallplate. 

3.   Use both hands to pull the thermostat straight away from 

the wallplate. 

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M15396 

PROPORTIONAL + INTEGRAL (P+I) CONTROL 
Like a mechanical thermostat, the T6570, T8570 Series have 

On/Off control output. However, this output is regulated by a 

P+I algorithm, enabling the thermostat to control closer to 

setpoint than conventional thermostats. This results in 

performance where the space temperature is maintained within 

0.75°C (1.5°F) of the setpoint regardless of fan speed. 

P+I action minimizes the difference between the temperature 

setpoint and the effective control point by adjusting the output 

on-time until the control point matches the setpoint. The on-

time is based on a fixed cycle rate of 4 cycles/hour for cooling 

(8 cycles/hour for heating), and the proportional band is 1.6°C 

(2.9°F). 

NOTE:   Integral action corrects the temperature control errors 

of proportional-only control, but it is slower to react to 

large temperature or setpoint changes. 

These thermostats also feature optional built-in time 

delays for equipment protection which can inhibit 

rapid response to large setpoint changes if active. 

SINGLE-STAGE COOLING OR HEATING CONTROL (SEE FIG. 4) 
In cooling mode the user setpoint will be positioned at the 

bottom of the Proportional Band, so the setpoint will effectively 

be the temperature where the cooling switches off. In heating 

mode the user setpoint will be positioned at the top of the 

Proportional Band, and this will be the temperature where the 

heating switches off. 

NOTE:   This also applies to models with manual heat/cool 

changeover. 

95C-10897–6  

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