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XT302C Deluxe Programmable
Heat-Cool Thermostat
18-HD25D7-5
INSTALLER'S GUIDE
APPLICATION
The XT302C Deluxe Programmable Heat-Cool Thermostat provides electrnic control of 24 Vac single-zone multistage systems.
Refer to Table 1 for a general description of the thermostat. This thermostat requires a common wire to supply power.
Table 1. Description of XT302C.
Model System Changeover System Selection Fan Selection Comments
XT302C Multistage Automatic Heat-Off-Cool-Auto On-Auto System and fan selec
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XT302C DELUXE PROGRAMMABLE HEAT-COOL THERMOSTAT THERMOSTAT B Y1 Y2 W1 W2 G R HH OT OT WALL WIRES THROUGH WALL OUTDOOR HUMIDISTAT TEMPERATURE OPENS ON RISE SENSOR COMPRESSOR HEAT TAYSTAT253A CONTACTOR 2 TAYSENS100A STAGE 2 COMPRESSOR HEAT L1 WALL FAN STAGE 1 CONTACTOR 1 (HOT) ANCHORS (2) 1 L2 TRANSFORMER 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M17116 Fig. 3. Typical hookup of XT302C in a heat cool system. MOUNTING HOLES MOUNTING SCREWS FOR STRAIGHT M150
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XT302C DELUXE PROGRAMMABLE HEAT-COOL THERMOSTAT DECREASE SET WAKE TIMES INCREASE TEMPERATURE SETTING OR SCROLL AND SETPOINTS FORWARD THROUGH INSTALLER SETUP OPTIONS TEMPERATURE SETTING OR SCROLL BACKWARD INCREASE TIME THROUGH INSTALLER SETTING OR SCROLL SETUP OPTIONS FORWARD THROUGH INSTALLER SETUP DISPLAY AND SYSTEM TEST INFORMATION SUCH AS PRESENT SET CURRENT SETTINGS DAY AND TIME AND OUTDOOR TEMPERATURE RETURN TO NORMAL OPERATIONS SET RETURN TIMES AND SETPOINTS SET CURRENT OR PROGR
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XT302C DELUXE PROGRAMMABLE HEAT-COOL THERMOSTAT Temperature Settings INSTALLER SETUP Refer to Table 2 for the default program. For 7-Day and 24-Hour Operation, the settings are the same for each day of The Installer Setup is used to customize the thermostat for the week. Refer to the Owners Guide, Pub. No. 22-5127-04, specific systems. Some of the options include Comfort-R™ for instructions on changing the default settings. control activation, Fahrenheit vs. Centigrade temperature display, outdo
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XT302C DELUXE PROGRAMMABLE HEAT-COOL THERMOSTAT IMPORTANT — To advance to the next Installer Setup, press Time ss . Only configurable numbers display. Example: Installer — To change a setting, press Increase s or Decrease t . Setup Number 1 does not display because it is not — To scroll the Installer Setup numbers backwards, press configurable. Review the factory settings in Table 3 Time tt . and make any desired changes in the Actual Settings — To exit the Installer Setup, press Run Program. co
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XT302C DELUXE PROGRAMMABLE HEAT-COOL THERMOSTAT Table 3. Installer Setup Options for the XT302C (continued). Press Time Press Increase s or Decrease t to change setting s or t Installer Actual Factory Setting Other Choices Setup Number Setting Select Display Description Display Description Adaptive 1 Conventional recovery 13 0 Adaptive Intelligent Intelligent Recovery (a (system starts recovery at Recovery™ Honeywell trademark) programmed time) control control is activated (system starts
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XT302C DELUXE PROGRAMMABLE HEAT-COOL THERMOSTAT Table 3. Installer Setup Options for the XT302C (continued). Press Time Press Increase s or Decrease t to change setting s or t Installer Actual Factory Setting Other Choices Setup Number Setting Select Display Description Display Description Minimum On 33 10 10-minute minimum on 0 thru 15 Minimum number of minutes Time (Cool) time for compressor (0 thru 15) the compressor will be on during call for cool Temperature 34 85 Highest setpoint 55
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XT302C DELUXE PROGRAMMABLE HEAT-COOL THERMOSTAT 2. Press Day until the current day displays. To start the self-test: Press and hold the Increase s and Decrease t keys at the Set Day/Time same time until all display segments and the number 10 PM Set Current appears (all displays segments appear for approximately Run Wake Leave Return Sleep Tue Program Day/Time Time Set Program Day Heat/Cool Hold Temp Day Filter System Fan Settings three seconds before the test number displays). See Daylight Copy
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XT302C DELUXE PROGRAMMABLE HEAT-COOL THERMOSTAT Table 5. Installer Self-Test Options. Key to Test Press Number Description Heating Equipment Self-Test (10) Time s 10 Enter heating equipment self-test. Temp s 11 First stage heat turns on. When Installer Setup number 2 is 1, the system fan is also energized. Temp s 12 Second stage heat turns on. Temp t 11 Second stage heat turns off. Temp t 10 First stage heat turns off. Cooling Equipment Self-Test (30) Time s 30 Enter cooling equipment self-t
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XT302C DELUXE PROGRAMMABLE HEAT-COOL THERMOSTAT 4. Press Increase s again to display the software revision DEVICE INFORMATION number (Example: 001=Revision number 1). SELF-TEST (70) 1. Press Temp s and t keys simultaneously, then press Time t t to access the thermostat information. M10229 5. Press the Increase s again to display the model identification number. (Example: 314 = Model ID 314) M4934 2. Press Increase s to display the production date code in a 3-digit format. The first two digits re
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XT302C DELUXE PROGRAMMABLE HEAT-COOL THERMOSTAT TROUBLESHOOTING (Continued). Symptom Possible Cause Action Heating will not come No power to the Check for 24 Vac between R and W terminals. on. thermostat. 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 between thermostat and HVAC equipment—replace any
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XT302C DELUXE PROGRAMMABLE HEAT-COOL THERMOSTAT American Standard Inc. Troup Highway Pub. No. 18-HD25D7-5 69-1213—1 T. C. Rev. 1-99 Printed in Taiwan R.O.C. Tyler, TX 75711-9010 69-1213—1 (T8624) 12
