Page 2 - Table 1; Old Label
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 ±...
Page 3 - Figure 1; Installing the Model 8353 Thermostat; For new installations, mount thermostat on inside wall, 4-5 feet
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 t...
Page 4 - MOUNTING HOLES
Figure 3 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 10. Secure base to wall with supplied scr...
Page 6 - Setting Daily Programming
5. Press 6. Press 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 toooften, increase the temperature diffe...
Page 7 - Begin Programmed Operation; until indicator is in PROG position.; SUMMER
4. Press SET. 5. Press or to change MORN temperature. 6. Repeat Steps 2-5 for DAY, EVE, and NITE. 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 ther...
Page 9 - To Test Thermostat
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...
Page 10 - Troubleshooting; Symptom; If problems with thermostat cannot be solved, call:
Troubleshooting Symptom Remedy Thermostat does not turn Check Wiring on system (see INSTALLATION).Check fuse. Replace with 2 ampSlo-Blo fuse if fuse has opened. Thermostat turns on and off too Increase Temperature Differential frequently. (see PROGRAMMING). Display is blank, flashing or Replace batt...
Page 11 - Wiring Diagrams
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. 11 Hot Heating Control Fan Control Cooling Control (COOLING) Transformer (HEATING) Transformer Transformer T HER MO STAT T HER MO STAT RH RC W Y...
Page 12 - Limited Warranty; Your Research Products Corporation Aprilaire; Products For Better Indoor Air Quality
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 inmaterials and workmanship. Research Products Corporation’s exclusive obligation under this warranty shallbe to supply, without ...