White Rodgers 1F78H manual

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Table of contents for the manual

  • Page 1

    Installation Instructions for Heating & Air Conditioning 1F78H 5/2 Da y Programmab le Thermostat CONTENTS Preparations .................................................. 1 Thermostat Details ........................................ 1 Removing Old Thermostat ............................ 1 Mounting and Wiring .....................................[...]

  • Page 2

    MOUNTING AND WIRING Take care when securing and routing wires so they do not short to adjacent terminals or rear of thermostat. Personal injury and/or property damage may occur. CAUTION ! ATTENTION! This product does not contain mercury. How- ever, this product may replace a unit which contains mercury. Do not open mercury cells. If a cell becomes [...]

  • Page 3

    CHECK THERMOST A T OPERA TION www.white-rodgers.com 5 RH 24 VAC 120 VAC Hot Neutral THERMOSTAT SYSTEM G W Figure 2. Typical wiring diagram for heat only, 4-wire, single transformer systems TRANSFORMER Heating System Fan Relay Y RC JUMPER WIRE O B C For Heat only, attach to RH and W NOTE RH Y 24 VAC 120 VAC Hot Neutral TRANSFORMER THERMOSTAT SYSTEM [...]

  • Page 4

    CHECK THERMOST A T OPERA TION CONTINUED FROM THIRD PAGE www.white-rodgers.com Before you begin programming your thermostat, you should be familiar with its features and with the display and the location and operation of the thermostat buttons. Your thermostat consists of two parts: the thermostat cover and the base . To remove the cover, gently pul[...]

  • Page 5

    www.white-rodgers.com Press or to select: SL OFF OFF ON 4 LO to 4 HI C Configuration Menu * Press HOLD to advance to ne xt item or TIME to mov e backwards to pre vious item Step 1 2 3 4 5 6 7 Press Button(s) PRGM and RUN HOLD* HOLD* HOLD* HOLD* HOLD* RUN Displayed (F actory Default) (F A) d-L (ON) E (ON) LOC (OFF) 0 HI (0) (F) Comments Select F A o[...]

  • Page 6

    www.white-rodgers.com PR OGRAMMING Y OUR THERMOST A T CONTINUED FROM FIFTH PAGE 6. Press or until you reach the current day of the week. 7. Press RUN once. The display will show the correct time and room temperature alternately. Enter Heating Program 1. Move the SYSTEM switch to HEAT . 2. Press PRGM once. “ MO TU WE TH FR ” (indicating weekday [...]

  • Page 7

    www.white-rodgers.com Symptom Possible Cause Corrective Action No Heat/No Cool/No Fan 1. Blown fuse or tripped circuit breaker . Replace fuse or reset breaker . (common problems) 2. Furnace power switch to OFF . T urn switch to ON. 3. Furnace blower compartment door or Replace door panel in proper position to engage panel loose or not properly inst[...]

  • Page 8

    Symptom Possible Cause Corrective Action Heat, Cool or Fan Runs Constantly . 1. Possible short in wiring. Check each wire connection to verify they are not 2. Possible short in thermostat. shorted or touching together . No bare wire should 3. Possible short in heat/cool/fan system. stick out from under terminal screws. T ry resetting 4. Fan Switch [...]