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®
ELECTRONIC THERMOSTATS
MODEL 8353
5 - 2 Day Programmable
1 Heat / 1 Cool
Electric / Gas
User’s Manual
Installation and
Programming
Installation Guide
IMPORTANT SAFETY INFORMATION WARNING:
Always turn off power at the main power source by unscrewing
•
fuse or switching circuit breaker to the off position before installing,
removing, cleaning, or servicing thermostat.
Read all of the information in this manual before installing or
•
programming this thermostat.
This is a 24V AC low-voltage th
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Features • Four setpoints for weekday programming—two setpoints for weekend comfort. • Two “AA” ENERGIZER brand batteries retain program memory, even during power outages. • Low battery indicator. • Fahrenheit/Celsius display option. • Programmable from 45°F (4°C) to 90°F (32°C). • Accuracy within ± 1 degree. • Adjustable temperature differential: 1-3 degrees. • Maintains summer and winter programming. • Low temperature freeze protection. While in heat mode, thermostat will mechanically turn o
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> Figure 1 Installing the Model 8353 Thermostat NOTE: For new installations, mount thermostat on inside wall, 4-5 feet above the floor. Do not install behind a door, in a corner, near air vents, in direct sunlight, or near any heat or steam generating fixtures. Installation at these places will affect thermostat operation. 1. Turn power off to the heating and cooling systems. 2. Place COOL-OFF-HEAT In OFF position. COOL-OFF-HEAT PROG MAN SET PROG/MAN COOL-OFF-HEAT FAN: AUTO - ON FAN: AUTO-ON 3.
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Figure 3 MOUNTING HOLES AM PROG PM RH RC MAN MORN DAY EVE NITE W CHANGE SET AUTO/MAN Y Elec G Gas COOL OFF HEAT FAN AUTO ON 7. Drill the marked holes using a 3/16” drill bit. Note: Enclosed plastic anchors do not require a drilled hole for drywall. 8. Tap plastic anchors into the wall. 9. Align base with plastic anchors and feed wires through opening. See Fig 4. Figure 4 AM PROG RH PM RC MAN MORN DAY EVE NITE W CHANGE SET AUTO/MAN Y
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> > > > 13. Install two “AA” ENERGIZER brand batteries or equivalent into battery compartment. Be sure to match positive (+) ends of batteries with positive (+) battery terminals in the battery compartment. The display will show as follows: 14. Replace cover onto thermostat by snapping into place. 15. Turn on power to system . Test thermostat as described in the following section. Programming Guide Set Time of Day, Day of Week, Temperature Differential 1. Press & Hold SET. Press PROG/MAN Relea
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> > > > > 5. Press 6. Press SET P To change Temperature Differential* *The Temperature Differential is Factory preset at 1°. This means that whenever the room temperature changes by one full degree from the temperature setting, the system will turn on. If the system turns on too often, increase the temperature differential. 7. Press SET to finish. Changing Fahrenheit (F) to Celsius (C) Press and Hold SET Press SET P Release both simultaneously. Setting Daily Programming 1. Place COOL-OFF-HEAT
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> > > > > 4. Press SET. SET PR PROG MAN SET PROG/MAN COOL-OFF-HEAT FAN: AUTO - ON 5. Press or to change MORN temperature. 6. Repeat Steps 2-5 for DAY, EVE, and NITE. COOL-OFF-HEAT 7. Press SET to finish. 8. Shift COOL-OFF-HEAT switch to HEAT position. 9. Repeat steps 2-7 to program HEAT (winter) settings. NOTE: Both summer and winter programs use the same time settings. Your thermostat is now programmed for summer and winter operation. It will follow the four settings (MORN, DAY, EVE, NITE) f
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> > > > > > Temporary Program Override To temporarily increase or decrease temperature Press or PROG MAN SET PROG/MAN COOL-OFF-HEAT FAN: AUTO - ON The thermostat will automatically return to the program at the next scheduled setting change or after four hours. Manual Operation Manual operation allows continuous override of the program settings. 1. Press PROG/MAN until indicator is in MAN position. PROG MAN PROG MAN T PROG/MAN SET PROG/MAN COOL-OFF-HEAT FAN: AUTO - ON 2.Press or to adjust tem
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> To Test Thermostat WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS VALVE OR SYSTEM CONTROL TO TEST OPERATION. THIS WILL DAM- AGE THE THERMOSTAT AND VOID YOUR WARRANTY. CAUTION: Do not switch system to cool if the temperature is below 50°F (10°C). This can damage the air conditioning system and cause personal injury. COOL-OFF-HEAT 1. Place the COOL-OFF-HEAT switch into the COOL position 2. Press the button until the temperature setting is at least 3 degrees below the room temperature
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Troubleshooting Symptom Remedy Thermostat does not turn Check Wiring on system (see INSTALLATION). Check fuse. Replace with 2 amp Slo-Blo fuse if fuse has opened. Thermostat turns on and off too Increase Temperature Differential frequently. (see PROGRAMMING). Display is blank, flashing or Replace batteries. constant “LO BAT.” Weekend Program follows four Verify that day of week is set adjustment settings. correctly (see PROGRAMMING). System fan does not operate Move fan option switch to either
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Wiring Diagrams The following is just a sample of the most common types of HVAC sys- tems. Refer to your systems installation manual for wiring information. HEAT ONLY HEAT/COOL 4-WIRE 3-WIRE SINGLE TRANSFORMER SINGLE TRANSFORMER Factory-Installed Factory- Installed jumper jumper T T RH RH H Transformer H Transformer E RC E RC Hot Hot R 120 VAC 24 VAC R 120 VAC 24 VAC Heating Heating W M W M Control Control O O Cooling S S Y Y Control T T A A Fan Fan G G Control T Control T HEAT ONLY 2-WIRE COOL
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Limited Warranty ® Your Research Products Corporation Aprilaire Thermostat unit is expressly warranted for two (2) years from date of installation to be free from defects in materials and workmanship. Research Products Corporation’s exclusive obligation under this warranty shall be to supply, without charge, a replacement for any thermostat which is found to be defective within a two (2) year period and which is returned, together with the date of installation, no later than thirty (30) days af
