Honeywell Thermostat Q539 User Manual

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Q539A H and J Subbases Instruction for the Trained Service Technician Subbases provide cooling anticipators and mounting for T87F Thermostats Q539 Subbases also provide system fan switching for heating cooling and heating cooling thermostats For subbase specifications refer to Tables 1 and 2 TABLE 1 SPECIFICATIONS Description provides system and fan switching and cooling for heating cooling systems Includes indicator LED for use in oil burner systems provides fan switching with Z terminal for low voltage switch to control fan in AUTO position provides system switching for control of heating and for heat pump and electric heating Auto fan operates fan relay on both heating and cooling RH RC W Y G X R W Y G X Z R W Y G X P O B TABLE 2 DESIGNATIONS b Transformer Transformer Relay or Valve Coil Contactor Coil Damper Motor or Changeover if used Damper Motor or Changeover if used Relay Coil Filter Switch or Lockout Switch control Pump Contactor Coil low voltage fan switch for control fan relay in AUTO position for both and cooling control Cooling transformer in systems with separate heating and circuits Heating transformer in systems with isolated heating and circuits Circuit only completed between R and B with system in HEAT position Circuit only completed between R and O with system in COOL position Only available on subbases with indicator LEDs Mercury Notice control contains mercury in a sealed tube Do not control in the trash at the end of its useful life this control is replacing a control that contains mer in a sealed tube do not place your old control in the your local waste management authority for regarding recycling and the proper disposal of control or of an old control containing mercury in a tube INSTALLING THIS PRODUCT Read these instructions carefully Failure to follow can damage product or cause a hazardous Check ratings given in instructions and on product to sure product is suitable for your application Make sure installer is a trained experienced service After completing installation check out product opera as provided in these instructions the subbase about 5 ft 1.5m above the floor in area with good air circulation at average temperature Registered Trademark 2002 Honeywell All Rights Reserved not mount the subbase where it may be affected by drafts or dead spots behind doors or in corners hot or cold air from ducts radiant heat from the sun fireplaces or appliances concealed pipes and chimneys unheated uncooled areas such as an outside wall Disconnect power supply to prevent electri shock or equipment damage Do not short across coil terminals on relay can burn out the thermostat heat Do not overtighten captive mounting screws damage to subbase threads can result AND WIRING power supply before beginning installation to electrical shock or equipment damage wiring must comply with local codes and ordinances In replacement applications check the existing sub wires for cracked or frayed insulation Replace any in poor condition If the wire is plastered into the wall a hole next to the wires and loosen the wires so that the can be pushed back into the wall later In new installations run wiring if necessary to the location To prevent interference with the thermostat keep wire length to a minimum and run wires close as possible to the subbase Connect the wires to the terminals inside the subbase to equipment manufacturer instructions for Q539 diagrams If not available refer to Fig 1 through 5 Push excess wire back through the hole and plug any with insulation to prevent drafts that can affect Loosely fasten the thermostat subbase to the wall with screw through the left mounting hole Adjust the subbase so is approximately level and start the second screw through right mounting slot Do not tighten Level the thermostat subbase using a spirit level as in Fig 1 Tighten mounting screws An incorrectly leveled subbase will cause temperature control to deviate from setpoint Mount and wire the thermostat to the thermostat sub using the equipment manufacturer instructions 1 Q539 using a spirit level 2 FOR 2 configuration STRAIGHT 5 16 in 8 mm WRAPAROUND 7 16 in 11 mm TERMINAL SCREW 3 hookup for Q539A in heating application with remote lockout INTERNAL SCHEMATIC HEAT OFF COOL RH Y G RC SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD AS REQUIRED 5 hookup for Q539J in heating applications Fan relay operates on heat or cool with fan in AUTO SETTING subbase switching positions control the system as described below SWITCH some subbases do not have all of the functions system is automatically controlled the thermostat Heating system is off the heating and cooling systems are off If fan switch is at AUTO position the cooling fan also off system is automatically controlled the thermostat Cooling system is off SWITCH operates continuously operates with cooling equipment as con by the thermostat or with the heating equip as controlled by the plenum switch move the subbase switches to the desired control use thumb and index finger to slide lever Stop must stop over desired function indicator position for circuit operation 4 hookup for Q539H in heating application with remote switching to select heating or cooling and to automatic fan operation INTERNAL SCHEMATIC SWITCH COOLING OR AUTO X TERMINAL IS USED ON Q539 MODELS WITH MALFUNCTION LIGHT POWER SUPPLY PROVIDE DISCONNECT AND OVERLOAD PROTECTION AS REQUIRED L1 INTERNAL SCHEMATIC HEAT OFF COOL AUTO SWITCH COOLING TERMINAL IS USED ON Q539 MODELS WITH FACTORY MALFUNCTION LIGHT NO O TERMONAL LOAD THERMOSTAT CURRENT DURING CYCLE VARIES DEPENDING ON WHETHER FAN SWITCH IN THE ON OR AUTO POSITION HEATER SHOULD BE SET FOR CURRENT LEVEL OF HEAT RELAY AND FAN RELAY COILS O TERMINAL LOAD SET THERMOSTAT HEAT ANTICIPATOR ITS MAXIMUM SETTING LIMIT THE THERMOSTAT HEATING CURRENT TO 0.8 AMPS TO ASSURE GOOD PERFORMANCE SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD AS REQ

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