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CONFIGURATION AND TERMINAL OUTPUTS 1F72-151 1F79-111 Mounting hole Reset Operation 1F72-151 If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the thermostat by pressing , and TIME at the same time. W903 Clip to Disable EMR Feature W903 O/B Terminal Switches Selection W904 Mounting Clip for hole Celsius Reset Operation 1F79-111 If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the thermostat by pressing , and at the same time when system is switched from “OFF” to “HEAT” position. W906 for Emergency Heat Second Stage Fan Control W905 Clip for Slow Cycle Thermostat base Configuration Menu 1F79-111 Press Button(s) 1F72-151 Press Button(s) Displayed (Factory Default) Set SYSTEM switch to OFF and for at least 2 seconds PRGM and RUN FA (ON) OFF Select Fast (on) or slow (off) Second Stage Heat HOLD * CL (OFF) ON Select Compressor lockout OFF or ON HOLD * 0 HI (0) 3 LO TO 3 HI Select temperature display adjustment higher or lower dL (ON) OFF 1F79-111 1F72-151 Step Step 1 2 1 3 2 4 3 5* 4* and momentarily HOLD ** 6 5 Move SYSTEM switch from OFF RUN and momentarily and momentarily Press or to select: COMMENTS Select display backlight OFF or ON Return to normal operation * Not available on earlier models ** Press HOLD to advance to next item or TIME to move backwards to previous item THERMOSTAT O/B Y Changeover Relay* G W2 E See Note ** Fan Relay Compressor Contactor Emergency Relay Aux Relay (Stage 2) L C R SYSTEM SYSTEM MONITOR SWITCH Hot 24 VAC 120 VAC Neutral * Changeover Relay is energized in COOL when O/B switch is in the “O” position Changeover Relay is energized in HEAT when O/B switch is in the “B” position TRANSFORMER (Class II) ** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency Typical wiring diagram for single transformer systems NOTE TECHNICAL HELP If safety circuits are in only one of the systems, remove the transformer of the system with NO safety circuits. THERMOSTAT O/B CUT AND TAPE OFF! Changeover Relay* HOT 120 VAC NEUTRAL Y 24 VAC Compressor Contactor G W2 E See Note ** Fan Relay Aux Relay (Stage 2) Emergency Relay L C SYSTEM MONITOR SWITCH R SYSTEM Limit or Safety Switches Hot 24 VAC 120 VAC Neutral * Changeover Relay is energized in COOL when O/B switch is in the “O” position Changeover Relay is energized in HEAT when O/B switch is in the “B” position TWO COMMONS MUST BE JUMPERED TOGETHER! TRANSFORMER (Class II) ** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency Typical wiring diagram for two transformer systems with NO safety circuits www.white-rodgers.com 161
