Aprilaire 8355 User Manual

Important Safety Information Warning:•Always turn off power at the main power source by unscrewingfuse or switching circuit breaker to the off positio

TroubleshootingSYMPTOM REMEDY 10Thermostat does not turn on system.Check Wiring (see INSTALLATION).Check fuse. Replace with 3 ampfuse if fuse has open

11RY1OBG EW2LCY2APRILAIRE MODEL 8355 HEAT PUMP THERMOSTATRYOGEW2LCW3CARRIER LOW VOLTAGE TERMINAL BOARDAPRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVER

12RY1OBG EW2LCY2APRILAIRE MODEL 8355 HEAT PUMP THERMOSTATRYOGW1W2XCCOMFORTMAKER LOW VOLTAGE TERMINAL BOARDAPRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CO

13RY1OBG EW2LCY2APRILAIRE MODEL 8355 HEAT PUMP THERMOSTATRYOGW2LCPAYNE LOW VOLTAGE TERMINAL BOARDAPRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVERSION

14RY1OBG EW2LCY2APRILAIRE MODEL 8355 HEAT PUMP THERMOSTATRYOGX2W-UBWEATHERTRON LOW VOLTAGE TERMINAL BOARDAPRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CON

15RY1OBG EW2LCY2APRILAIRE MODEL 8355 HEAT PUMP THERMOSTATRYOGEW1LCTLENNOX LOW VOLTAGE TERMINAL BOARDAPRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVERSI

Limited WarrantyYour Research Products Corporation Aprilaire®Thermostat unit is expressly warranted for two (2) years from date of installa-tion to be

Features• Four pre-programmed setpoints for each day of the week.• Fast and easy programming for setting all days of the week simultaneously.• Energy

FIGURE 1Installing the Model 8355 ThermostatNOTE: For new installations, mount thermostat on inside wall, 4-5 feetabove the floor. Do not install behi

FIGURE 37. Drill the marked holes using a 3/16" drill bit. NOTE: Enclosed plasticanchors do not require a drilled hole for drywall.8. Tap plastic

Programming Guide Set Time of Day, Day of Week,Temperature Differential, Residual Cooling1. Press SET & PROG/MAN.Release simultaneously.Press or t

Changing Fahrenheit (F) to Celsius (C)Press and Hold SET PressRelease both simultaneously.Energy Efficient RecoveryThe energy efficient recovery featu

Setting Daily Programming1. Place COOL-OFF-HEAT-EMin COOL position.2. Press SET button. The display will show anumber from 1 to 7. This number represe

3. Press PROG/MAN buttonuntil indicator is in PROG position.Temporary Program OverrideTo temporarily increase or decrease temperaturePress or The ther

To Test ThermostatWARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GASVALVE OR SYSTEM CONTROL TO TEST OPERATION. THIS WILL DAMAGETHE THERMOSTAT AND