Honeywell Q682C User's Manual
Contents
1. Lt Remove thermostat cover by lifting from bottom Set aside cover until called for later LJ Carefully remove material protecting mercury switch bulb a Li Loosen 2 captive mounting screws and separate waltplate if provided from back of thermostat base 4 MOUNT WALLPLATE OR SUBBASE Hold wallpiate or subbase in position on wall as shown in Fig 2 LJ Mark holes for anchors on the wali Use spirit level to make sure the wallplate or subbase will be level LJ Drill 3 16 in holes and gently tap anchors into holes until flush with the wali Pull wires through large wiring hole in subbase 3 screw HOLES WITH PLASTIC ERR SUBBASE nass o Run wires from heating or heating cooling equip ment to new thermostat location IMPORTANT This control requires an additional conductor to the control transformer common i e typical 2 wire heating system requires 3 wires be pulled 4 wire heating cooling requires 5 wires Lirt cover Fig 1 Unpack thermostat o Loosely fasten the wallplate or subbase to the wall with the 3 screws oO Carefully level the wallpiate or subbase Fig 3 and firmly tighten screws Oo For mounting on horizontaf or vertical outlet box see instructions packed with optional Cover Plate Assembly Part No 1931214 Fig 2 Mounting wallplate or subbase to wall aaea Fig 3 Level2. Direct Spark Ignition DSI intermittent Pilot IP and Standing Pilot SP Compatibile Ensure that the 24 V control transformer common is accessible for connection to thermostat cable conductor and power to transformer is not reg ularly interrupted by high temperature or limit operation Heat Pump Compatible Ensure correct subbase identity selected for fan control and changeover control O terminal for cool and B terminal for heat if system with first stage heat pump and gas or oil second stage heat use conventional recovery models f system with first stage heat pump and electric second stage heat use ramp recovery model Hot Water Zone Honeywell 2 wire valves are compatible Some non Honeywelil 2 wire valves wili require a R8238D1015 Isolating Relay in the thermostat control circuit Some 3 wire valves will require an R8239A1062 Iso lating Relay in the thermostat control circuit4 b Oil Ensure that the 24 V control transformer common is accessible for connection to thermostat cable con ductor and power to transformer is not regularly interrupted by high temperature purge cycle or limit operation lf the control transformer common is not accessible a separate transformer and TRADELINE wallplate or subbase with two C C clock terminals will be required Vent Damper Honeywell damper motors are compatible Some non Honeywell damper motors will require an R823901015 isolating Rela
3. nals R and C TABLE 2 TERMINAL DESIGNATIONS SUBBASE TERMINAL CONTROL FUNCTION R Control transformer power wW Heating control circuit Y Cooling control circuit jumper to W for heat pump compressor control G Fan control circuit c Timer control transformer common e Changeover or reversing valve made continuously in cool B Changeover or reversing valve made continuously in heat O Push excess wire back into wall O Plug hoje in wali with nonhardening caulk putty or nonflammablie insulation to prevent drafts from affect ing thermostat operation 6 MOUNT THE THERMOSTAT Note the tabs on the top inside edge of the ther mostat base These fit the slots molded into the top of the wallplate or subbase o Hang thermostat base on wallplate or subbase g Insert the two captive mounting screws located in the bottom corners of the base Fig 5 Firmly tighten screws MOUNTING SLOT 2 Fig 5 Thermostat mounting 7 SET HEAT ANTICIPATOR O Make sure you know the current draw anticipator setting for your system This information can be found printed on the primary control at the furnace or on the furnace output listing labei However it is good in stallation practice to physically test the heating primary current draw before setting the heat anticipator This is done by connecting the R and W terminals through a suitable meter 0 5 A or with th
4. spare program pins ramp recovery seg ments if provided in storage area under front lift up cover The two levers on top of thermostat control the tow and high temperatures for energy savings and com fort control Fig 10 The lever on the left blue mark controls the lower temperature The lever on the right red mark controls the higher temperature We recommend pushing the levers together at an appropriate temperature for either heat or cool until the occupant programs the thermostat and makes finai temperature selections 11 SET SUBBASE SWITCHES O The subbase system switch controls system oper ation as follows EMERGENCY HEAT Q682L only The emergency heat relay is energized The cooling system is off and the compressor is de energized Emergency heat equipment is controlled by the thermostat HEAT Heating system is controlled by the thermo stat Cooling system is off COCL Cooling system is controlled by the ther mostat Heating system is off OFF Both the heating and cooling systems are off If the fan switch is at the AUTO position the fan is also off 10 SET TEMPERATURE CONTROL LEVERS When time is correctly set the Time Indicator Arrow Figs 7 and 8 must point to the corresponding daytime light or nighttime dark portion of the program dial TIME INDICATOR ARROW Fig 8 Set timer on modet T8185R with ramp recovery LOW T
5. ECTION AS REQUIRED both heat and cool TIMER COOLING ARTICIPATOR NONADIUSTABLE HEATING THERMOSTAT ANTICIPATOR ADIUSTABLE A e seen eevee eee pias FAN SWITCH SUBBASE S POSITION ea pny SYSTEM TX SWITCH 5 u A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PRO TO SET ANTICIPATOR AT CORRECT RATING MEASURE COMPRESSOR TECTION A5 REQUIRED RELAY CURRENT ON A WIRE WITH FAN SWITCH IN AUTO POSITION SET ANTICIPATOR AT 140 PERCENT OF CURRENT DRAW CONNECT VALVE TO TERMINAL O FOR POWER ON COOLING OR TO TERMINAL B FOR POWER ON HEATING naza Fig 14 Hookup showing a typical single stage heat pump control system THERMOSTAT My AND cI ANTIIPATOR SUBBASE Q al Sonitor STen e 4 POWER SUPPLY PROVIDE DISCONNECT MEANS ANO OVERLOAD PROTECTION AS REQUIRED A RIGHT HANO SWITCH BALL OSTERMINES SWITCH POSITION Fig 15 Hookup showing a typical 2 stage heating 1 stage cooling heat pump control system Honeywell Inc 4885 Douglas Drive N Golden Valley MN 55422 4386 Australia Canada Finland France Germany Japan Mexico Netherlands International Sales Offices in ali principal citles of the world Manufacturing in Q Spain Taiwan United Kingdom U S A PRINTED IN U S A QUALITY IS KEY
6. EMP LUE MARK SET LEVER HIGH TEMP RED MARK SET LEVER SCREW HOLES FOR LOCKING LEVER SCREWS ES Fig 10 Temperature control levers O The subbase fan switch controls fan operation as follows ON Fan operates continuously AUTO Fan operates with cooling equipment as con trolled by the thermostat n electric heat systems and in heat pump systems the fan is controlled by the thermostat during heating also o To switch positions use thumb or index finger to slide lever to desired position Switch lever must stop in the detent over desired function indicator mark for proper circuit operation 12 CHECK OUT THERMOSTAT OPERATION Do NOT check operation by shorting across ter minats of relay or valve coil this will burn out the thermostat heat anticipator HEATING ONLY SYSTEM Turn on power to the furnace o Push both temperature setting levers together at least 5 F 3 C above room temperature The main burner should come on The fan will start when the fur nace heats up g Move both levers 5 F 3 C below room tempera ture The burner should shut off g Operate the entire heating system at least one complete cycle IF THERMOSTAT FAILS ANY TEST REFER TO TROUBLESHOOTING GUIDE IN THE OWNER S MANUAL Reset both temperature setting levers to desired temperatures HEATING COOLING SYSTEM O Turn on power to the furnace and cooling system Place t
7. Honeywell T8085D Q6828 C T8185 Q6828 C L 8185 Y8024 HEATING AND HEATING COOLING NEW CONSTRUCTION THERMOSTATS AND SUBBASES INSTALLATION INSTRUCTIONS 1 PREPARATION LJ Check thermostat and subbase if used suitability for the heating or heating cooling system Refer to Table 1 i Assemble tools required flat blade screwdriver hand or power drill with 3 16 in drill bit wire cutter line LJ It subbase or waliplate is mounted on a vertical outlet box order the optional 193121A Cover Plate stripper or sharp knife bubble ievel or plumb bob and Assembly includes cover plate adapter ring and screws O Ensure power is off to the heating or heating cooling system at the main fuse panei Most buildings have a separate switch box or circuit breaker for dis connecting power to the heating and cooling if appli cabie equipment THIS THERMOSTAT is compatible with virtually all heat ing or heating cooling systems See Table 1 for addi tional thermostat compatibility information TABLE 1 THERMOSTAT AND SYSTEM COMPATIBILITY TYPE OF HEATING SYSTEM TO BE CONTROLLED CONDITIONS COMPATIBILITY Electric line voitage typical baseboard and radiant The R8239D1015 Isolating Relay or R841 Silent Switching Center must be installed in the thermostat control circuit Electric Furnace forced air Compatidie Ensure correct subbase identity selected for fan control Gas
8. at COOL and one complete cycle with the switch at HEAT O IF THERMOSTAT FAILS ANY TEST REFER TO TROUBLESHOOTING GUIDE iN THE OWNER S MANUAL O Reset both temperature setting levers to desired temperatures LEAVE OWNER S MANUAL ASSISTANCE INFORMA TION AND REPLY CARD IN A CONVENIENT PLACE FOR THE BUILDING OCCUPANT OR PROVIDE WITH OTHER APPLIANCE MANUALS THERMOSTAT COOLING ANTICIPATOR NONADJUSTABLE H HEATING ANTICIPATOR ADJUSTABLE WALLPLATE Lu AX rower SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PRO YECTION AS REQUIRED nare Fig 11 Hookup showing a typical 24 V gas heating control system HEATING ANTICIPATOA ADJUSTABLE FAN EP EE COOLING ANTICIPATOR NORADJUSTABLEY THERMOSTAT POSITION A n SYSTEM SWITCH SUBBASE coouns CONTROL HEATING CONTROL Fig 13 Hookup showing a typica electric heating mechanical cooling control system Thermostat controls fan on POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED wera Fig 12 Hookup showing a typical heating cooling control system HEATING ANTICIPATOR COOLING ANTICIPATOR NONADIUSTABLE THERMOSTAT POSITION aa SYSTEM SWITCH supaase HEATING CONTROL cooLiNG CONTROL POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROT
9. ermostat wire held through a clamp on meter using multiple loops to mag nify the field ten loops are typically used so meter read snows tow VOLTAGE ing can be divided by ten Physical measurement is urged as modern HVAC equipment typically incor porates multiple control circuit loads and accurate anticipator setting prevents poor control and callbacks Oo Move heat anticipator lever to match the current draw Fig 6 except in single stage heat pump sys tems in these systems set the anticipator at 1 4 times the actual current draw to reduce the cycling rate ANTICIPATOR SCALEPLATE irasa OIL BURNER CONTROL SHOWS LOW VOLTAGE ZONE VALVE TYPICAL GAS VALVE stows Low vourace 24 Vac 50 60 Hz ut ra DA Borner Ta FROM MAIN a HOWS POEL surrey ANTICIPATOR corr Fig 6 Setting heat anticipator 4 8 SET TIMER Adjust the timer by moving the knob in clockwise direction Do NOT reverse the knob TIME INDICATOR Fig 7 Set timer on models with conventional recovery 9 ATTACH THERMOSTAT COVER Make sure the packing inserts in the thermostat base have been removed Place the two tabs on upper edge of cover into mounting siots in thermostat base Fig 9 Swing cover downward until it engages catch at bottom of base if locking cover is used tighten the recessed hex head retaining screw at bottom of cover Install
10. he system switch lever at HEAT and fan switch lever at AUTO g Push both temperature setting levers together at least 5 F 3 C above room temperature The main burner should come on The fan wiil start when the fur nace heats up If central electric heat system fan starts immediately TYPICAL WIRING DIAGRAMS Follow the hookup diagram suppiied with your heat ing or heating cooling equipment If not available use the following diagrams as a guide REMEMBER Your wiring must follow local electrical codes and ordinances O Move both levers 5 F 3 C below room tempera ture The burner should shut off g Place the system switch lever at COOL and the fan switch lever at AUTO The cooling equipment should operate and the fan will start Allow for any time delay that may be built into the compressor control circuit NOTE To avoid compressor damage do not operate the system if outdoor temperature is below 50 F 10 C Refer to manufacturer s recommendations O Move both temperature setting levers together at least 5 F 3 C above room temperature The cooling equipment should shut off O Place the fan switch at ON The fan should run continuously with the system switch in any position oO Place the system switch at OFF Move both temperature setting levers to various positions The heating and cooling systems should not operate o Operate the entire system for at least one com piete cycle with the system switch
11. ing methods for wallplate or subbase 5 WIRE WALLPLATE OR SUBBASE Follow the instructions provided by the heating or heating cooling equipment manufacturer if not avail able refer to TYPICAL WIRING DIAGRAMS at end of this publication NOTE Ail wiring must comply with loca electrical codes and ordinances FOR WALLPLATE Heating Only System Li Refer to Fig 4 and strip thermostat wire insulation as necessary LJ Connect wires to R W and C terminals Firmly tighten screws The timer is powered by the system s low voltage transformer NOTE An unmarked fourth terminal is provided for 3 wire series 20 primary controls Fig 11 Push excess wire back into wall go Plug hole in wal with nonhardening caulk putty or nonflammable insulation to prevent drafts from affect ing thermostat operation BARRIER FOR STRAIGHT FOR WRAPAROUND CONNECTION CONNECTION STRIP 5 16 IN 47 9 mmt STRIP 7 18 IN 1 1 mmh Fig 4 Methods of connecting terminais FOR SUBBASE Heating Cooling Systems O Refer to Fig 4 and strip thermostat wire insulation as necessary o Connect the wires to corresponding terminals on the subbase If labels do not agree with your new subbase Refer to Table 2 or Figs 12 15 Determine correct hookup from the listed contro function and the equipment control circuit The timer is powered by the system s low voltage transformer 24 Vac must be maintained across termi
12. y in the thermostat control circuit 4 Check control amperage requirement Warm Air Zone Most are compatible 4 thermostat is not compatible with the system being controlled the system wili not operate No hazard exists The thermostat will not be damaged unless it is used to directly control a line voltage system A Honeywell R841 or R8239D1015 Isolating Relay must be added to the thermostat control circuit for proper system operation Consult manufacturer for installation requirements C H Rev 7 88 Form Number 69 0258 2 Honeywell inc 1988 2 LOCATE NEW THERMOSTAT Locate thermostat about 5 ft 1 5 m above the floor in an area with good air circulation at average temper ature Do not mount the thermostat where it may be affected by drafts ar dead spots behind doors and in corners hot or cold air from ducts radiant heat from the sun or appliances concealed pipes and chimneys unheated uncooled areas behind the thermostat such as an outside wall 3 UNPACK THERMOSTAT NOTE illustrations show thermostat models that have conventional recovery from heating setback except when noted LJ Handle new thermostat carefully rough handling may interfere with its accuracy Before unpacking refer to Fig 1 Remove and discard shipping wrap IMPORTANT Save package of screws instructions and spare pro gram pins and ramp recovery segments T8185R only for homeowner
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