Page 2 - Recycling Notice; not; Table of Contents; Page
M3375 Recycling Notice This control contains mercury in a sealed tube.Do not place control in the trash at the end of its useful life. If this control is replacing a control that containsmercury in a sealed tube, do not place your old control in the trash. Contact your local waste management authori...
Page 6 - Fig. 1—Setting high and low temperature levers.
17 191108 WALLPLATE. Provides mountingbase and wiring connections for heating-only or cooling-only thermostat. 18 Q682 SUBBASE (not included withthermostat; ordered separately). Providesmounting base, wiring connections andmanual switching control for heating/coolingthermostat. See Setting Subbase S...
Page 8 - Inserting Clock Batteries
Setting Subbase Switches (If Applicable) The subbase system switch controls system operation as follows:HEAT—Heating system is controlled by the thermostat. Cooling system is off. COOL—Cooling sytem is controlled by the thermostat. Heating system is off. OFF—Both the heating and cooling sytems are o...
Page 10 - Setting the Clock; Do not; Daylight Savings Time; not reverse; Programming; Before setting your program
Setting the Clock ■ Lift thermostat flip-up cover to find the 24-hourprogram dial, slotted in 10-minute increments.Adjust the clock to the current time by movingthe minute hand carefully in a clockwisedirection. Do not reverse the minute hand. ■ After setting the time correctly, the TimeIndicator Ar...
Page 12 - Setting the Heating Program:; red; Setting the Cooling Program:; blue
also probably want to change the leverpositions. Setting the Heating Program: ■ Decide when you want the temperature toreach the comfort level. Find the notch on thedial that is one-half hour before this time andinsert a red pin. The high temperature is in effect. The half-hour head start period giv...
Page 14 - To prevent damage to the program; Troubleshooting; Problem
Press the button to immediately begin an energy savings period or return to the normalsetting. After pressing the button, check theprogram indicator on the thermostat cover toassure the system is in the desired mode. If theprogram indicator shows blue, the lower tempera-ture is in effect; if it show...
Page 22 - Voltage at Clock Terminals; AC Voltage at; Servicing the Thermostat
Voltage at Clock Terminals AC Voltage at C-C Terminals Check Action 0 Vac. — System power off. — Restore power. — Short in clock power supply wiring. — Replace wiring. — Limit switch contacts stuck open. — Free or replace limit switch. — Transformer supplying power is — Replace transformer. burned o...
Page 24 - Thermometer Adjustment
Thermometer Adjustment The thermometer was accurately calibrated at the factory and should only need adjustment if itwas dropped or mishandled. If the setpoint lever and the thermometer reading do not agree, use the following procedure: 1. Remove thermostat cover and open the flip-up cover. 2. Set t...
Page 26 - Limited One-Year Warranty
26 27 69-0639—1 Limited One-Year Warranty Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a periodof one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the ...