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Aprilaire 8355 manual

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Table of contents for the manual

  • Page 1

    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[...]

  • Page 2

    Features • Four pre-programmed setpoints for each day of the week. • Fast and easy programming for setting all days of the week simultaneously . • Energy efficient recovery . • Residual cooling for added air -conditioning efficiency . • T wo “AA” ENERGIZER brand batteries retain program memory, even during power outages. • Low batte[...]

  • Page 3

    FIGURE 1 Installing the Model 8355 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. IMPORT ANT : This thermo[...]

  • Page 4

    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. T ap plastic anchors into the holes. 9. Align base with plastic anchors and feed wires through opening. See Fig 4. FIGURE 4 10. Secure base to wall with supplied screws. 11. Connect wires to terminal strip. R[...]

  • Page 5

    Programming Guide Set T ime of Day , Day of Week, T emperature Differential, Residual Cooling 1. Press SET & PROG/MAN. Release simultaneously . Press or to change T ime of Day . 2. Press 3. Press T o Change Day of Week 4. Press 5. Press T o change 1st Stage T emperature Differential NOTE: The T emperature Differential is Factory preset at 1°. [...]

  • Page 6

    Changing Fahrenheit (F) to Celsius (C) Press and Hold SET Press Release both simultaneously . Energy Efficient Recovery The energy efficient recovery feature looks ahead up to 2 hours prior to the end of the setback (or set-up) period to begin monitoring pe rf or mance and calculating when to turn on your system. It also determines whether the aux-[...]

  • Page 7

    Setting Daily Programming 1. Place COOL-OFF-HEA T -EM in COOL position. 2. Press SET button. The display will show a number from 1 to 7. This number represents the day of the week to be programmed. If programming individual days, press either or button to adjust the day of the week to program (1=Mon., 2=T ues., etc.). 3. Press SET . Press or to cha[...]

  • Page 8

    3. Press PROG/MAN button until indicator is in PROG position. T emporary Program Override T o temporarily increase or decrease temperature Press or 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.[...]

  • Page 9

    T o T est Thermostat WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS V ALVE OR SYSTEM CONTROL TO TEST OPERA TION. THIS WILL DAMAGE THE THERMOST A T AND VOID YOUR W ARRANTY . 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 . 1. Place the COO[...]

  • Page 10

    T roubleshooting SYMPTOM REMEDY 10 Thermostat does not turn on system. Check Wiring (see INST ALLA TION). Check fuse. Replace with 3 amp fuse if fuse has opened. Five minute compressor short cycle protection may be in effect. Press RESET to override. NOTE: This will erase programming. Thermostat turns on and off too frequently . Increase T emperatu[...]

  • Page 11

    11 R Y1 O BG E W2 LC Y2 APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT R Y O G E W2 L C W3 CARRIER LOW VOLTAGE TERMINAL BOARD APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVERSION TO CARRIER SPLIT SYSTEM CONDENSORS AND HEAT PUMP SYSTEMS THE LOW VOLTAGE TERMINAL DESIGNATIONS AND THEIR DESCRIPTION AND/OR FUNCTION ARE USED ON ALL SPLIT SYSTEM CONDENSORS AND[...]

  • Page 12

    12 R Y1 O BG E W2 LC Y2 APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT R Y O G W1 W2 X C COMFORTMAKER LOW VOLTAGE TERMINAL BOARD APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVERSION TO COMFORTMAKER CYC SERIES HEAT PUMP SYSTEMS THE LOW VOLTAGE TERMINAL DESIGNATIONS AND THEIR DESCRIPTION AND/OR FUNCTION ARE USED ON ALL SPLIT SYSTEM CONDENSORS AND HEAT PUM[...]

  • Page 13

    13 R Y1 O BG E W2 LC Y2 APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT R Y O G W2 L C PAYNE LOW VOLTAGE TERM INAL BOARD APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVERSION TO PAYNE RELIANT AND ENDURA MODEL HEAT PUMP SYSTEMS THE LOW VOLTAGE TERMINAL DESIGNATIONS AND THEIR DESCRIPTION AND/OR FUNCTION ARE USED ON ALL SPLIT SYSTEM CONDENSORS AND HEAT PUMPS[...]

  • Page 14

    14 R Y1 O BG E W2 LC Y2 APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT R Y O G X2 W-U B WEATHERTRON LOW VOLTAGE TERMINAL BOARD APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVERSION TO WEATHERTRON HEAT PUMPS THE LOW VOLTAGE TERMINAL DESIGNATIONS AND THEIR DESCRIPTION AND/OR FUNCTION ARE USED ON ALL SPLIT SYSTEM CONDENSORS AND HEAT PUMPS 24 VAC, RETURN COM[...]

  • Page 15

    15 R Y1 O BG E W2 LC Y2 APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT R Y O G E W1 L C T LENNOX LOW VOLTAGE TERMINAL BOARD APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVERSION TO LENNOX CB19 HEAT PUMP SYSTEMS THE LOW VOLTAGE TERMINAL DESIGNATIONS AND THEIR DESCRIPTION AND/OR FUNCTION ARE USED ON ALL SPLIT SYSTEM CONDENSORS AND HEAT PUMPS 24 VAC, RETURN[...]

  • Page 16

    Limited Warranty Y our Research Products Corporation Aprilaire ® Thermostat unit is expressly warranted for two (2) years from date of installa- tion to be free from defects in materials and workmanship. Research Products Corporation’ s exclusive obligation under this war- ranty shall be to supply , without charge, a replacement for any thermost[...]