Operating Instructions READ AND SAVE THESE INSTRUCTIONSAprilaire®Communicating Thermostat Model 8870CAUTION: Do not set to OFF mode during periods whe

1716WARRANTYELECTRONIC THERMOSTAT FIVE YEAR LIMITED WARRANTYYour Research Products Corporation Aprilaire®Thermostat unit is expressly warranted for fi

61000491 12.06B2202659B®Aprilaire®Automatic HumidifiersThe world’s first computer-equipped,completely automatic humidifiers.Aprilaire®High Efficienc

ModeFanEnterSCROLL/SET-UP BUTTONSADJUSTBUTTONSMESSAGE DISPLAYMAIN DISPLAY REMOTENETWORKOVERRIDECOOLHEATEM. -AUXDEHUMHUMIDIFYBIASDIF1DIF2CFANRHONROOMFC

NETWORK STATUSNETWORKOVERRIDELOCKOUTFAN STATUSMODE STATUSSET POINTSROOM TEMPERATURE/RELATIVE HUMIDITYREMOTE TEMPERATURE/RELATIVE HUMIDITYFIGURE 2MAIN

1. SELECT THE MODE (cont.)• HEAT OR COOL (AUTO-CHANGEOVER) – HEAT or COOL appears on the display. Either the heating or cooling equipment will operate

765. NETWORK OVERRIDE If the Network Override has not been disabled in the Thermostat Set-Up, the Network Overridecan be initiated by pressing the Ent

FIGURE 6FIGURE 5FIGURE 4three navigation buttons are pressed in 5minutes, the display will return to PassiveDisplay. Again, one menu item can beseen a

11• COMMUNICATIONS SET-UP – This is where the thermostat address is entered.Additionally, the total number of thermostats is entered here to optimize

1312IN CASE OF POWER FAILUREThis thermostat does not require a battery. If the power goes out, the screen is blank.During the period the power is off,

1514NOTES:NOTES: