Honeywell Thermostat Q539 User Manual - Honeywell Thermostat Manual Download

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Sunday, April 5, 2020

Honeywell Thermostat Q539 User Manual

Q539A, H and J Subbases Installation Instruction for the Trained Service Technician. Application Q539 Subbases provide cooling anticipators, and mounting for T87F Thermostats. Q539 Subbases also provide system and fan switching for heating, cooling, and heating-cooling thermostats. For subbase specifications, refer to Tables 1 and 2. TABLE 1—SUBBASE SPECIFICATIONS. System Fan See Model Description Switch Switch Terminals Fig. Q539A provides system and fan switching and cooling HEAT- AUTO-ON RH-RC-W-Y-G-X 3 anticipator for heating cooling systems. Includes indicator OFF- LOCKOUT LED for use in oil burner systems. COOL Q539H provides fan switching with Z terminal for low voltage NONE AUTO-ON R-W-Y-G-X-Z 4 fan switch to control fan in AUTO position. Q539J provides system switching for control of heating and HEAT- AUTO-ON R-W-Y-G-X-P-O-B 5 cooling for heat pump and electric heating. Auto fan operates OFF- through fan relay on both heating and cooling. COOL TABLE 2—TERMINAL DESIGNATIONS. Terminal Connection M3375 Mercury Notice R Transformer. This control contains mercury in a sealed tube. Do not a RC Cooling Transformer. place control in the trash at the end of its useful life. RH b Heating Transformer. If this control is replacing a control that contains mer­ W Heating Relay or Valve Coil. cury in a sealed tube, do not place your old control in the trash. Y Cooling Contactor Coil. Contact your local waste management authority for Bc Heating Damper Motor or Changeover instructions regarding recycling and the proper disposal of Valve (if used). this control, or of an old control containing mercury in a Od Cooling Damper Motor or Changeover sealed tube. Valve (if used). G Fan Relay Coil. Installation Xe Clogged Filter Switch or Lockout Switch (primary control). WHEN INSTALLING THIS PRODUCT… P Heat Pump Contactor Coil. 1. Read these instructions carefully. Failure to follow instructions can damage product or cause a hazardous Z Q539H low voltage fan switch for control condition. of fan relay in AUTO position for both 2. Check ratings given in instructions and on product to heating and cooling control. make sure product is suitable for your application. 3. Make sure installer is a trained, experienced service a Cooling transformer in systems with separate heating and cooling circuits. technician. 4. After completing installation check out product opera­ b Heating transformer in systems with isolated heating and cooling circuits. tion as provided in these instructions. c Circuit only completed between R and B with system LOCATION switch in HEAT position. Locate the subbase about 5 ft (1.5m) above the floor in d Circuit only completed between R and O with system switch in COOL position. an area with good air circulation at average temperature. e Only available on subbases with indicator LEDs. ®U.S. Registered Trademark Copyright © 2002 Honeywell • • All Rights Reserved 95-6486-9 Do not mount the subbase where it may be affected by: — drafts or dead spots behind doors or in corners. Fig. 1—Level Q539 using a spirit level . — hot or cold air from ducts. — radiant heat from the sun, fireplaces, or appliances. SPIRIT LEVELING — concealed pipes and chimneys. LEVEL POSTS (2) — unheated (uncooled) areas such as an outside wall. CAUTION • Disconnect power supply to prevent electri­ cal shock or equipment damage. • Do not short across coil terminals on relay, OPENING FOR this can burn out the thermostat heat THERMOSTAT MOUNTING anticipator. WIRING SLOTS • Do not overtighten captive mounting screws M3319A because damage to subbase threads can result. MOUNTING AND WIRING Disconnect power supply before beginning installation to Fig. 2—Barrier configuration. prevent electrical shock or equipment damage. All wiring must comply with local codes and ordinances. FOR STRAIGHT 1. In replacement applications, check the existing sub­ INSERTION– FOR WRAPAROUND– STRIP 5/16 in. (8 mm) STRIP 7/16 in. (11 mm) base wires for cracked or frayed insulation. Replace any wires in poor condition. If the wire is plastered into the wall, make a hole next to the wires and loosen the wires so that the wires can be pushed back into the wall later. BARRIER 2. In new installations, run wiring (if necessary) to the M8831 subbase location. SUBBASE TERMINAL SCREW IMPORTANT: To prevent interference with the thermostat linkage, keep wire length to a minimum and run wires as close as possible to the subbase. Fig. 3—Typical hookup for Q539A in heating­ cooling application with remote lockout 3. Connect the wires to the terminals inside the subbase. indication. Refer to equipment manufacturer instructions for Q539 wiring diagrams. If not available, refer to Fig. 1 through 5. Q539A/T87F INTERNAL SCHEMATIC 4. Push excess wire back through the hole and plug any T87F opening with insulation to prevent drafts that can affect TEMP. performance. R1 FALL 5. Loosely fasten the thermostat subbase to the wall with ADJUST- a screw through the left mounting hole. Adjust the subbase so ABLE it is approximately level and start the second screw through HEAT ANTICIPATOR FIXED COOL ANTICIPATOR the right mounting slot. Do not tighten. W1 Y1 6. Level the thermostat subbase using a spirit level as shown in Fig. 1. FAN OFF AUTO ON 7. Tighten mounting screws. OFF LOCKOUT HEAT COOL HEAT COOL INDICATOR IMPORTANT: An incorrectly leveled subbase will cause LIGHT the temperature control to deviate from setpoint. XRH W YG RC 8. Mount and wire the thermostat to the thermostat sub­ FAN base using the equipment manufacturer’s instructions. RELAY HEATING COOLING SWITCH CONTROL CONTROL HEATING COOLING TRANSFORMER TRANSFORMER 1 1 L2 L1 L2 L1 (HOT) (HOT) 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M8832 95-6486—9 2 Settings Fig. 5—Typical hookup for Q539J in heating­ cooling applications. Fan relay operates SUBBASE SETTING automatically on heat or cool with fan in AUTO The subbase switching positions control the system position operation as described below. SYSTEM SWITCH (some subbases do not have all of the Q539J/T87F INTERNAL SCHEMATIC following functions): T87F COOL—cooling system is automatically controlled TEMP. by the thermostat. Heating system is off. R1 FALL OFF—both the heating and cooling systems are off. If FILTER LIGHT the fan switch is at AUTO position, the cooling fan ADJUST- is also off. ABLE HEAT HEAT—heating system is automatically controlled ANTICIPATOR by the thermostat. Cooling system is off. W1 Y1 FAN FAN SWITCH: OFF ON ON—fan operates continuously. HEAT COOL HEAT OFF COOL AUTO AUTO—fan operates with cooling equipment as con­ trolled by the thermostat or with the heating equip­ 1 ment as controlled by the plenum switch. X W Y B R O G P To move the subbase switches to the desired control positions, use thumb and index finger to slide lever. Stop ELECTRIC HEATING lever must stop over desired function indicator position for HEAT FAN DAMPER RELAY RELAY proper circuit operation. MOTOR CLOGGED 2 FILTER SWITCH COMPRESSOR Fig. 4—Typical hookup for Q539H in heating­ OR COOLING RELAY COOLING cooling application with remote switching PANEL DAMPER CONNECTION MOTOR required to select heating or cooling and to provide automatic fan operation. Q539H/T87F INTERNAL SCHEMATIC 3 T87F TEMP. L2 L1 R1 FALL (HOT) FILTER LIGHT 1 X TERMINAL IS USED ON Q539 MODELS WITH FACTORY- ADJUST- INSTALLED MALFUNCTION LIGHT. ABLE HEAT 2 WITH NO O TERMONAL LOAD, THERMOSTAT CURRENT DURING ANTICIPATOR HEATING CYCLE VARIES DEPENDING ON WHETHER FAN SWITCH W1 Y1 IS IN THE ON OR AUTO POSITION. HEATER SHOULD BE SET FOR COMBINED CURRENT LEVEL OF HEAT RELAY AND FAN RELAY COILS. WITH O TERMINAL LOAD, SET THERMOSTAT HEAT ANTICIPATOR FAN TO ITS MAXIMUM SETTING. (LIMIT THE THERMOSTAT HEATING AUTO ON LOAD CURRENT TO 0.8 AMPS TO ASSURE GOOD PERFORMANCE.) 3 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD 1 X PROTECTION AS REQUIRED. W Y Z G R M8834 HEAT REMOTE SYSTEM FAN SWITCH RELAY COOL Checkout CLOGGED COOLING FILTER SWITCH CONTACTOR When installation is complete, turn on power supply and OR COOLING HEATING COIL PANEL RELAY OR check system operation. CONNECTION VALVE COIL EXTERNAL SWITCHING HEATING FOR AUTO FAN Move the system switch on the Q539 to HEAT and the fan switch to AUTO. Move the heating setpoint dial to about 6AC (10AF) above room temperature. Heating equipment should start and the fan should run. Change the setpoint to 1 X TERMINAL IS USED ON Q539 MODELS WITH FACTORY-INSTALLED MALFUNCTION LIGHT. 2 about 6AC (10AF) below the room temperature. The heating equipment and fan should shut off. 2 POWER SUPPLY. PROVIDE DISCONNECT L2 L1 MEANS AND OVERLOAD PROTECTION AS REQUIRED. (HOT) M8833 NOTE: In heat pump applications, a minimum off-timer provides a five-minute time delay before starting com­ pressor when the thermostat last turned off the compres­ sor, or when the system first received power. This delay prevents compressor short cycling. 3 95-6486—9 COOLING FAN Move the subbase switch to OFF and the fan switch to ON. The fan should run continuously. Move the fan switch to AUTO. In this position, fan operation is controlled by the CAUTION heating or cooling system control circuit. If outside air or heat exchange medium (water) is Operate the entire system one complete cycle with below 10AC (50AF), do not operate cooling. switches in each position before leaving installation. Turn thermostat dial to the desired setting and set the system and Move the system switch on the Q539 to COOL and the fan switches. fan switch to AUTO. Move the cooling setpoint dial to about 6AC (10AF) below room temperature. Cooling equipment should start and the fan should run. Change the setpoint to about 6AC (10AF) above the room temperature. The cooling equipment and fan should shut off. Automation and Control Solutions Honeywell Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 Printed in U.S.A. on recycled paper containing at least 10% 95-6486–9 G.H. Rev. 8-02 post-consumer paper fibers. www.honeywell.com/yourhome

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