Honeywell T8501 User Manual download pdf (Page 3)

T8501 MICROELECTRONIC THERMOSTATS

3 69-0925—4

Fig. 4. Typical hookup in heat and cool system with

one transformer.

Fig. 5. Typical hookup in heat and cool system with

two transformers.

Fig. 6. Correct wiring technique.

Mounting Thermostat

1. Engage tabs at the top of the thermostat and wall-

plate. See Fig. 7.

2. Press lower edge of case to close and latch.

NOTE: To remove the thermostat from the wall, first pull

out at the bottom of the thermostat; remove top

last.

Fig. 7. Mounting thermostat on wallplate.

(HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

AVAILABLE ON SELECT MODELS.

HEATING

RELAY OR

VALVE COIL

M4821

COMPRESSOR

CONTACTOR

FAN

RELAY

CBO GYW

OUTDOOR

TEMPERATURE

SENSOR

COOL

CHANGEOVER

VALVE OR

DAMPER

HEAT

CHANGEOVER

VALVE OR

DAMPER

THERMOSTAT

OT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

AVAILABLE ON SELECT MODELS.

JUMPER Rh TO Rc IN A SINGLE TRANSFORMER SYSTEM.

HEATING

RELAY OR

VALVE COIL

M4820

COMPRESSOR

CONTACTOR

FAN

RELAY

RhO

T OT O GYCBW

OUTDOOR

TEMPERATURE

SENSOR

COOL

CHANGEOVER

VALVE OR

DAMPER

HEAT

CHANGEOVER

VALVE OR

DAMPER

THERMOSTAT

(HOT)

M4826

FOR WRAPAROUND

INSERTION STRIP

7/16 IN. (11 MM).

FOR STRAIGHT INSERTION

STRIP 5/16 IN. (8 MM).

M6798

PRESS LOWER EDGE OF CASE TO LATCH.

ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE.

1 2 3 4 5 6 7 8 ... 11 12

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Honeywell T8501 User Manual Page 3

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