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X-XX UL

INSTALLATION INSTRUCTIONS

®U.S. Registered Trademark
Copyright © 1997 Honeywell Inc.  •            •   All Rights Reserved

T8501D

Deluxe Zone Thermostat

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.

RECYCLING NOTICE

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

not place your old

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.

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.

Model

Application

Powering Method

Changeover

System Selection

Fan Selection

T8501D Zone 1 on MABS II or

TotalZone® system

Requires common wire to
power supply

Automatic or

Manual

Heat-Off-Cool-Auto

On-Auto

/

69-1049-1

Содержание T8501D

Страница 1: ... 5m above the floor in an area with good air circulation at average temperature See Fig 1 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...

Страница 2: ...power before wiring to prevent electrical shock or equipment damage 1 Loosen the terminal screws on the wallplate and connect the system wires See Fig 5 IMPORTANT Use 18 gauge color coded thermostat cable for proper wiring 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 5 FEET ...

Страница 3: ...igure 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 Fig 7 Key locations and descriptions O G B C W R Y OT OT O1 T8 G1 T7 B1 T6 E1 T5 T4 M1 THERMOSTAT CHANGEOVER CONTROL OUTDOOR TEMPERATURE SENSOR OPTIONAL ZONE 1 M12187 O B G Y R W C OT OT W2 L G Y R W M6 M4 M1 THERMOSTAT TotalZone PA...

Страница 4: ...n 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 us...

Страница 5: ...operation after the call for cool ends 01 Fan operation is extended 90 seconds after the call for cool ends Not used 21 thru 23 Outdoor temperature displayb 24 00 No outdoor temperature is displayed 01 Outdoor temperature is displayed Needs a C7089B1000 Outdoor Sensor to operate Not used 25 thru 32 Minimum off time for the compressor 33 05 5 minute minimum off time for the compressor 00 01 02 03 o...

Страница 6: ...ess and hold the increase and decrease keys together for three seconds to exit the system test The system test will time out after ten minutes without any key presses Table 4 Installer System Test Options Continued Em HeatOffCool Auto Only Heat Cool OnAuto System Fan Room Outdoor Em Ht Temporary Setting Wait Humid Aux Ht Remote Repl Batt M4844 M6792 TEST MODE NUMBER Test Number Self Test Descripti...

Страница 7: ...s the thermo stat information 4 Press the increase key again to display the software revision number Example 001 Revision number 1 M4864 M10444 M4866 M6791 Key to Press Test Number Description Key Operation System Test IMPORTANT Test numbers will only be displayed when the system is configured for the selected function EXAMPLE Numbers 60 61 and 62 are the only numbers that will be displayed when a...

Страница 8: ...he circuit breaker is tripped reset the circuit breaker check if the system fuse is blown replace the fuse check if the power switch on the HVAC equipment is in the Off position set to the On position check wiring between thermostat and HVAC equipment replace any broken wires and tighten any loose connections If 24 Vac is present proceed with troubleshooting Thermostat microprocessor is locked up ...

Страница 9: ...eck wiring between thermostat and HVAC equipment replace any broken wires and tighten any loose connections If 24 Vac is present proceed with troubleshooting Thermostat minimum off time is activated Wait up to five minutes for the system to respond Enter Installer Setup number 33 Reconfigure minimum off time if required System selection is not set to Cool Set system selection to Cool System on ind...

Страница 10: ...69 1049 1 10 T8501D DELUXE ZONE THERMOSTAT ...

Страница 11: ...69 1049 1 11 T8501D DELUXE ZONE THERMOSTAT ...

Страница 12: ... ZONE THERMOSTAT Helping You Control Your World 69 1049 1 J H Rev 6 97 Printed in Taiwan R O C www honeywell com yourhome Honeywell Trol A Temp 57 Bushes Lane Elmwood Park NJ 07407 3204 201 794 8004 800 828 8367 Fax 201 794 1359 ...

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