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69-1049—1

6

T8501D DELUXE ZONE THERMOSTAT

IMPORTANT

Review the settings to confirm that they match
the system. To exit the Installer Setup, press and
hold the Information   

i

   key until the display

returns to normal (approximately three seconds).

INSTALLER SYSTEM-TEST

Use the Installer System-Test to check the thermostat
operation. Refer to Table 3 for a list of the available
system-tests.

To start the system-test:

CAUTION

The minimum off time for compressors is bypassed
during the Installer System-Test. Equipment
damage can occur if the compressor is cycled too
quickly.

Press and hold the increase 

 and decrease 

▼ 

keys at

the same time, until two zeros appear. All segments of the
LCD will be displayed before the two zeros appear. See
Fig. 11 and 12.

Table 3. Tests Available In The Installer System-Test.

Fig. 11. Display of all the segments of the LCD.

Fig. 12. Display of test number.

Refer to Table 4 for the directions and results of the
specific tests.

NOTE:

Press 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 Description

10-19

Heating equipment can be turned on  
and off

30-39

Cooling equipment can be turned on  
and off

40-49

Fan equipment can be turned on and off  

60-69

Keyboard keys test

70-79

Thermostat information including date
code and software versions are displayed

Key to

Press

Test

Number

Description

Heating Equipment System-Test

 

10

Enter heating equipment system-test.

  

11

Heat comes on. When Installer Setup number 02 is 01, the system fan is also energized.

  

10

Heat and system fan turn off.

Cooling Equipment System-Test

 

30

Change from heating to cooling equipment system-test.  

  

31

Cool and system fan come on.

  

30

Cool and system fan turn off.

Fan Equipment System-Test

 

40

Change from cooling to fan equipment system-test.

  

41

Fan comes on.

  

40

Fan turns off.

Summary of Contents for T8501D

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

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

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

Page 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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