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69-1055-1

5

T8524C,D MULTISTAGE MICROELECTRONIC THERMOSTATS

Table 2. Thermostat Installer Setup Options.

a

Available on select models.

Installer Setup Number 02 must be set to 01 to extend fan operation.

(Continued)

Installer Setup  

Number

(Press 

  i   

key

Factory-Setting

Other Choices  

(Press 

 or  

 key to change)

Actual

Select

to change)

Display

Description

Display

Description

Setting

Not used

01

Fan operation

a

02

00

Conventional applica-
tions where equipment
controls fan operation in
heat mode

01

Heat pump and electric heat
applications where
thermostat controls fan
operation in heat mode

Not used

03 and 04

Stage-two
heating cycle
rate

05

06

6 cph used for
conventional systems

01, 03,  
or 09

01—1 cph used for radiant

floor heat, gravity systems

03—3 cph used for hot water

systems or high efficiency
furnaces

09—9 cph used for electric

heat systems

Not used

06 thru 11

Changeover
(T8524D only)

12  

01

Manual changeover

00

Automatic changeover

Not used

13  

Degree
temperature
display

14

00

Temperature is
displayed in °F

01

Temperature is displayed in
°C

Not used

15 thru 18  

Extended fan
operation in
heating

a,b

19  

00

No extended fan
operation after the call
for heat ends

01

Fan operation is extended  
90 seconds after the call for  
heat ends

Extended fan
operation in
cooling

a

20  

00

No extended fan
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
display

a

24

00

No outdoor temperature
is displayed

01

Outdoor temperature is
displayed. Needs a
C7089B1000 Outdoor
Sensor to operate.

Not used

25 thru 29

Deadband

30

03

Heating and cooling
setpoints can be set no
closer than 3°F (1.5°C)

04 thru
10

Heating and cooling
setpoints can be set no
closer than the chosen
value:

04—4°F (2°C)
05—5°F (2.5°C)
06—6°F (3°C)
07—7°F (3.5°C)
08—8°F (4°C)
09—9°F (4.5°C)
10—10°F (5°C)

Not used

31 and 32

Minimum off
time for the
compressor

33

05

5 minute minimum off
time for the compressor

00, 01,
02, 03
or 04

Minimum number of minutes  
(0 thru 5) the compressor will
be off between calls for the
compressor

Summary of Contents for DMULTISTAGE T8524C

Page 1: ... your application 3 Installer must be a trained experienced service technician 4 After completing installation use these instructions to check out the product operation CAUTION Disconnect power supply to prevent electrical shock or equipment damage 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 th...

Page 2: ...ews into the holes 6 Tighten mounting screws WIRING All wiring must comply with local electrical codes and ordinances Refer to Fig 3 for typical hookups A letter code is located near each terminal for identification CAUTION Disconnect 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 4 IMPORTANT Us...

Page 3: ...A B PRESS LOWER EDGE OF CASE TO LATCH A ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE M6801 DISPLAY PRESENT SETTINGS AND SCROLL THROUGH INSTALLER SETUP MODES INFORMATION KEY i DECREASE TEMPERATURE SETTING INCREASE TEMPERATURE SETTING Using Thermostat Keys The thermostat keys are used to set temperature display present setting configure Installer Setup check System Test display outdoor temperature...

Page 4: ...ting To change between heat and cool press the Information i key until the setting to be changed appears INSTALLER SETUP NOTE For most applications the thermostat factory settings do 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 The Installer Setup is used to customize the thermostat to specific systems Install...

Page 5: ...geover Not used 13 Degree temperature display 14 00 Temperature is displayed in F 01 Temperature is displayed in C Not used 15 thru 18 Extended fan operation in heatinga b 19 00 No extended fan operation after the call for heat ends 01 Fan operation is extended 90 seconds after the call for heat ends Extended fan operation in coolinga 20 00 No extended fan operation after the call for cool ends 01...

Page 6: ...nAuto System Fan Room Outdoor Em Ht Temporary Setting Wait Humid Aux Ht Remote Repl Batt M4844 M6792 TEST MODE NUMBER a Available on select models b T8524D is 48 F 9 C IMPORTANT Review the settings to confirm that they match the system INSTALLER SYSTEM TEST Use the Installer System Test to check the thermostat configurations and operation Refer to Table 3 for a list of the available system tests T...

Page 7: ...n T8524C 31 Stage one cool and system fan come on 32 Stage two cool comes on Stage one cool and system fan remain on 31 Stage two cool turns off 30 Stage one cool and system fan turn off Fan Equipment System test T8524D only i 40 Change from cooling to fan equipment system test 41 Fan comes on 40 Fan turns off Key or Switch Operation System test IMPORTANT Test Numbers will only be displayed when t...

Page 8: ...ill not come on Thermostat is not being powered Check that C terminal is connected to the system transformer Check for 24 Vac between C and R or RH terminals If missing 24 Vac check if the 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 ...

Page 9: ...pment 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 mode number 33 Reconfigure minimum off time if required System selection is not set to Cool Set system selection to Cool Cooling setpoint is above room temperature Check co...

Page 10: ...69 1055 1 10 T8524C D MULTISTAGE MICROELECTRONIC THERMOSTATS ...

Page 11: ...69 1055 1 11 T8524C D MULTISTAGE MICROELECTRONIC THERMOSTATS ...

Page 12: ...ATS Home and Building Control Honeywell Limited Honeywell Limitée 155 Gordon Baker Road North York Ontario M2H 3N7 Home and Building Control Honeywell Inc Honeywell Plaza P O Box 524 Minneapolis MN 55408 0524 69 1055 1 J H Rev 6 97 www honeywell com yourhome ...

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