Honeywell T8501D User Manual

T8501D

Deluxe Zone Thermostat

INSTALLATION INSTRUCTIONS

APPLICATION

The T8501 Deluxe Zone Thermostat provides electronic control of 24 Vac single-stage zoned heating and cooling systems. Refer to Table 1 for a general description of the thermostat.

Table 1. Description of T8501 Thermostat.

Model Application Powering Method Changeover System Selection Fan Selection

T8501D Zone 1 on MABS II or

TotalZone® system

RECYCLING NOTICE

If this control is replacing a control that contains mercury in a sealed tube, do control in the trash.

Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old thermostat.

INSTALLATION

When Installing this Product…

1. Read these instructions carefully. Failure to follow the instructions can damage the product or cause a hazardous condition.

2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.

3. Installer must be a trained, experienced service technician.

4. After completing installation, use these instructions to check out the product operation.

Location

Install the thermostat about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature. See Fig. 1.

Requires common wire to power supply

not

place your old

Automatic or

Manual

Do not install the thermostat where it can be affected by: —drafts, or dead spots behind doors and in corners. — hot or cold air from ducts. —radiant heat from sun or appliances. — concealed pipes and chimneys. — unheated (uncooled) areas such as an outside wall

behind the thermostat.

Wallplate Installation

The thermostat can be mounted horizontally on the wall or on a 2 in. x 4 in. wiring box. Position wallplate horizontally on the wall or on a 2 in. x 4 in. wiring box.

1. Position and level the wallplate (for appearance

only). The thermostat will function properly even when not level.

2. Use a pencil to mark the mounting holes. See Fig. 2.

3. Remove the wallplate from the wall and drill two

3/16 inch holes in the wall (if drywall) as marked. For firmer material such as plaster, drill two 7/32 inch holes. Gently tap anchors (provided) into the drilled holes until flush with the wall.

4. Position the wallplate over the holes, pulling wires

through the wiring opening.

5. Loosely insert the mounting screws into the holes.

6. Tighten mounting screws.

Heat-Off-Cool-Auto On-Auto

X-XX UL

69-1049-1

T8501D DELUXE ZONE THERMOSTAT

WIRES THROUGH WALL

WALL ANCHORS (2)

Fig. 2. Mounting the wallplate.

YES

5 FEET

[1.5 METERS]

Fig. 1. Typical location of thermostat.

WALL

Wiring

All wiring must comply with local electrical codes and ordinances. Refer to Fig. 3 and 4 for typical hookups. A letter code is located near each terminal for identification.

1. Loosen the terminal screws on the wallplate and

connect the system wires. See Fig. 5.

IMPORTANT

MOUNTING HOLES

MOUNTING SCREWS

M6530

2. Securely tighten each terminal screw.

3. Push excess wire back into the hole.

4. Plug the hole with nonflammable insulation to

prevent drafts from affecting the thermostat.

M10106

CAUTION

Disconnect power before wiring to prevent electrical shock or equipment damage.

Use 18 gauge, color-coded thermostat cable for proper wiring.

69-1049—1

T8501D DELUXE ZONE THERMOSTAT

OUTDOOR

TEMPERATURE

SENSOR

OGB CWRYOTOT

CHANGEOVER CONTROL

Fig. 3. Typical wiring diagram for T8501D with zone 1

OBGYRWCOTOT

W2 L G Y R W M6 M4 M1

TotalZone® PANEL THERMOSTAT CONNECTIONS

Fig. 4. Typical wiring diagram for T8501D with zone 1

THERMOSTAT

MABS II control panel.

THERMOSTAT

TotalZone® control panel.

FOR WRAPAROUND INSERTION STRIP 7/16 IN. (11 MM).

(OPTIONAL)

ZONE 1

OUTDOOR

THERMOSTAT

SENSOR

(OPTIONAL)

FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM).

M4826

M12187

M12186

Fig. 5. Proper wiring technique.

Mounting Thermostat

1. Engage tabs at the top of the thermostat and

wallplate. See Fig. 6.

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.

ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE.

PRESS LOWER EDGE OF CASE TO LATCH.

M6798A

Fig. 6. Mounting thermostat on wallplate.

Using Thermostat Keys

The thermostat keys are used to:

• set temperature,

•display present setting,

• configure Installer Setup,

• check System-Test,

•display outdoor temperature (select models),

• set the system operation,

• set the fan operation.

See Fig. 7 for the location of the keys.

INCREASE TEMPERATURE SETTING

DECREASE TEMPERATURE SETTING

DISPLAY PRESENT SETTINGS AND SCROLL THROUGH INSTALLER SETUP MODES (INFORMATION KEY)

M6801

Fig. 7. Key locations and descriptions.

69-1049—1

T8501D DELUXE ZONE THERMOSTAT

SETTINGS

System and Fan Settings

System settings control the thermostat operation as follows:

Heat: The thermostat controls the heating. Off: Both the heating and cooling are off. Cool: The thermostat controls the cooling. Auto: The thermostat automatically changes between

heating and cooling operation, depending on the indoor temperature.

Fan settings control the system fan as follows:

On: Fan operates continuously. Auto: Fan operates with equipment.

The system default setting is Heat and the fan default setting is Auto. Use the keyboard to change to the desired settings. See Fig. 8.

Fan

System

Press to select

heating or cooling

equipment.

equipment. Em. Ht.

-Emergency heating

On— Fan runs continuously

Heat—Heating equipment

Auto—Fan runs when Off — No equipment Cool—Cooling equipment Auto—Thermostat

automatically selects heating and cooling equipment.

CHECK LIGHT ON SELECT MODELS

heating or cooling equipment operates

System

Fan

Fig. 8. Thermostat System and Fan key location.

NOTE: Always press the keys with your fingertip or

similar blunt tool. Sharp instruments like a pen or pencil point can damage the keyboard.

Temperature Settings

The default setpoint for heat is 70°F (21°C) and for cool is 78°F (25.5°C). Press the increase ▲ or decrease ▼ key to change the present setting to change between heat and cool, press the Information i key until the setting to be changed appears. Press the increase ▲ or decrease ▼ key to adjust the setting.

System

Fan

M10147

The Installer Setup is used to customize the thermostat to specific systems. Some of the options include temperature display, changeover and outdoor temperature display. Installer Setup numbers are listed in Table 2. The table includes all the configuration options and the factory settings for the T8501.

A combination of key presses are required to use the Installer Setup feature. — To enter the Installer Setup, press and hold the

Information i key with the increase ▲ and decrease ▼ keys until the first number is displayed. All display segments appear for approximately three seconds before the number is displayed. See Fig. 9 and 10.

— To advance to the next Installer Setup, press the

Information i key.

— To change a setting, use the increase ▲ and de-

crease ▼ keys.

— To exit the Installer Setup, press and hold the

Information i key until the display returns to normal (approximately three seconds). The display will scroll the numbers backwards to get to the normal display. The Installer Setup is automatically exited if no key presses are made for ten minutes.

Em Ht Temporary Setting Aux Ht

Remote

Room

%Humid

Repl

Wait

Batt

System Fan

Heat Cool

Em HeatOffCool Auto Only

Fig. 9. Display of all the segments of the LCD.

INSTALLER SETUP MODE NUMBER DISPLAY (COLUMN 2 OF TABLE 2)

Outdoor

OnAuto

M4844

FACTORY SETTING OR OTHER CHOICE DISPLAY (COLUMN 3 OR 5 OF TABLE 2)

INSTALLER SETUP

NOTE: For most applications, the thermostat factory-

settings will not need to be changed. Review the factory settings in Table 2 and if no changes are necessary, go to the Installer System-Test section.

69-1049—1

M10105A

Fig. 10. Display of Installer Setup number and setting.

IMPORTANT

Only configurable numbers are shown on the device. Example: If thermostat does not have outdoor temperature capability, Installer Setup Number 24 will not be displayed. Review Table 2 factory-settings and mark any desired changes in the Actual Settings column. When Installer Setup is complete, review the settings to confirm that they match the system.

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