® SINCE 1886 AUTO SAVER 550 5 : 2 22 3 OwnerÕs Manual 7 Model 44550
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Introduction CONGRATULATIONS! Your new Hunter electronic thermostat will provide years of reliable service. By saving energy, your thermostat will pay for itself during its first season of use. Thank you for buying a Hunter product! Please read this manual for complete instructions on installing and operating your thermostat. If you require further assistance, call Hunter Technical Support at 901-745-9222 from 8 a.m. to 5 p.m. Central Time.
Table of Contents INTRODUCTION INSTALLATION PROGRAMMING OPERATIONS 4-5 Read This Before Installing Thermostat 6 Features 8 What You Need 10 Remove Old Thermostat 10 Wire Labeling 11 Mount Wallplate and Thermostat 12 Selector Switches 14 Setting Time and Day 16 Auto Programming 17 Personal Program Schedule 18 Manual Programming 19 Weekday / Weekend Programming 19 7-Day Programming 21 Reviewing Programs 22 Reviewing the Current Temperature Setting 23 System Selector Switch 2
Table of Contents (continued) OPERATIONS (continued) SAFETY FEATURES TROUBLESHOOTING WIRING DIAGRAMS Temporary Manual Override 24 Permanent Manual (Vacation) Override 25 Auto Season Changeover 26 Home Today 26 Energy Monitor 28 Filter Monitor 29 Auto Recovery 30 Keyboard Lock 31 Backlighting 31 Low Battery Warning 32 Error Mode 33 Auto Cut-Off 33 Problems & Solutions 34 Technical Support 35 Heat / Cool Systems 36 Single-Stage Heat Pump Systems 37 Heat Only / Cool Only Sys
Read This Before Installing Thermostat IMPORTANT Read the entire installation section of this Owner’s Manual thoroughly before you begin to install or operate your Hunter Thermostat. REMOVE THE MYLAR LABEL FROM THE LCD DISPLAY WINDOW. 1 6-7 represent most central heating, air conditioning, or space heating units in use in the United States. This Hunter Thermostat will NOT control multi-stage heat pumps or 110/220 Volt systems. COMPRESSOR PROTECTION The thermostat provides a 3.
Read This Before Installing Thermostat (continued) POWER FAILURE Whenever the main power is interrupted or fails, the battery power retains the programs and current time. 7 AUTO RECOVERY Your thermostat is set from the factory to gradually recover the room temperature from an energy saving program to your comfort program. Therefore, the thermostat may turn your system on several minutes prior to your programmed time. This operation is normal, but can be turned off.
Features Light Bar: Activates INDIGLO® night-light to allow display viewing in the dark. ENERGY: Measures and displays heating and cooling system operating time for Today, Yesterday, This Week, Last Week, or Total. By monitoring your energy usage, you can program the thermostat to optimize energy savings. 8-9 HOME TODAY: Overrides energysaving program temperatures while you are at home for the day.
For entering minute of day. For entering day of week. For entering hour of day. Enters Program Mode for reviewing and changing weekday, weekend, or daily programs. Selects the day or days to review or change in Program Mode. HOUR MIN DAY PROG AUTO PROGRAM FILTER PROG DAY HOLD CLEAR Automatically programs the thermostat to its built-in ENERGY STAR® compliant program settings. See page 17. RETURN Provides permanent temperature setting by overriding stored programs.
INSTALLATION 10-11 What You Need This thermostat includes two #8 slotted screws and two wall anchors for mounting. To install your thermostat, you should have the following tools and materials. ■ Slotted Screwdriver(s) ■ Phillips Screwdriver ■ Hammer ■ Electric drill and 3/16" bit ■ Two 1.5 V (AA) size alkaline batteries Remove Old Thermostat CAUTION: Do not remove any wiring from existing thermostat before reading the instructions carefully. WIRES MUST BE LABELED PRIOR TO REMOVAL.
Wire Labeling ■ Each wire coming from the wall to the existing thermostat is connected to a terminal point on that thermostat. Each of these terminal points is usually marked with a code letter as shown in Table A on this page. ■ The number of wires in your system can be as few as two (for heat only systems), as many as eight, or any number in between. If you follow the labeling procedures correctly, you do not have to be concerned about how many wires there are.
INSTALLATION 12-13 Mount Wallplate and Thermostat ■ Remove the wallplate from your thermostat by pressing the release tab on the bottom of the thermostat. (See Figure 2.) ■ Position wallplate on wall and pull existing wires through large opening. Then level for appearance. Mark holes for plastic anchors provided if your existing holes do not line up with those on the Hunter wallplate. ■ Drill holes with 3/16” bit and gently tap anchors into the holes until flush with wall.
Connect Wires and Mount Thermostat Cover to Wall Plate ■ Match and connect the labeled wires to the appropriate coded terminal screws on the mounting plate. (See Figure 4, 5.) Ignore any wires which may be present, but which were not connected to the old thermostat. ■ Be sure to tighten the terminal screws securely, otherwise a loose wire could cause operational problems with your system or thermostat. ■ Push excess wire back into hole to prevent interference with mounting of the thermostat cover.
-15 INSTALLATION Selector Switches In order for this Hunter thermostat to control your system, the system type must be specified by selector switches on the printed circuit board inside the thermostat. There are also other selector switches that allow you to customize the features to suit your needs. NOTE: When changing these features after installation, move the HEAT / COOL selector switch to OFF before removing the thermostat from the wall.
Feature Selector Switches: ■ F° / C° selector (Fahrenheit / Centigrade) – Switch 5 Your thermostat is set for F° mode from the factory. In order to change to C° mode, slide the switch to C° and press the reset button on front of the thermostat with a paper clip. NOTE: Unless the reset button is pressed, the thermostat will not change temperature mode. ■ 12 Hr. / 24 Hr. selector – Switch 6 Your thermostat is set for normal 12 hour (AM / PM) time format.
PROGRAMMING 16-17 Setting Time and Day Remove the mylar label covering the LCD display window before operating thermostat. M T W Th F Sa Su SET TEMP ■ Initial display after power-up or reset. The LCD will show the information when batteries are first installed, or after the Reset button is pressed. The temperature will update after a few seconds. AM PM 1 2 : 00 H °C 1234 AUTO COOL HEAT TEMP EXAMPLE: Set the thermostat to the current time of 9:43 a.m. on Saturday. Refer to Figure at right.
Auto Programming Studies conducted by the Department of Energy estimate that setting your thermostat back 10°F (6°C) for two 8-hour periods during winter can reduce your fuel bill by as much as 33%. By setting your thermostat up 5°F (3°C) for two 8-hour periods during summer you can reduce your fuel bill up to 25%. Your thermostat is capable of holding up to 4 separate programs for each day of the week.
PROGRAMMING 18-19 Personal Program Schedule Before programming or changing programs, use this Personal Use a pencil so you can revise your records each time you Program Schedule to determine which times and temperature settings change your temperature settings. will best satisfy both your comfort and energy saving requirements.
Manual Programming ■ Your thermostat can be programmed for weekdays and weekends, or have unique programs for all 7 days. Use Weekday/Weekend Programming below or 7-day Programming on page 21 to enter or revise programs to match your Personal Program Schedule. The same steps are used when entering programs for the first time, or revising programs entered during Auto Programming.
PROGRAMMING 20-21 Weekday/Weekend Programming (cont.) Step 2 PROG Step 3 Use ■ Press PROG key to enter program mode, display shows weekday programs. ■ Display for HEAT mode shown. HOUR and MIN to change the setpoint time. Step 2 M T W Th F Sa Su SET TEMP AM PM 16 : 00 H °C 1234 AUTO COOL HEAT TEMP Use Step 4 Step 5 and to change the setpoint temperature. PROG ■ Press to move to programs 2, 3 and 4. ■ Repeat Step 3 to complete the weekday programs.
7-Day Programming Step 1 COOL OFF HEAT AUTO ■ Slide System Selector Switch to HEAT or COOL to program the corresponding system. Step 2 Step 2 ■ Press to enter program mode, display shows weekday programs. PROG ■ Press 2 times to reach the Monday program. PROG DAY M T W Th F Sa Su SET TEMP AM PM 16 : 00 H °C 1234 AUTO COOL HEAT TEMP Step 3 Use HOUR and MIN 68 °C H Step 3 to change the setpoint time. M T W Th F Sa Su SET TEMP Use and to change the setpoint temperature.
PROGRAMMING 22-23 7-Day Programming (cont.) Step 7 COOL OFF HEAT AUTO ■ Change the System Selector Switch to the other system, and repeat Steps 2 through 6 above. Reviewing Programs You may want to review the programs to confirm that the settings are compatible with your lifestyle. Weekday Programs PROG ■ Press to display M – F programs. ■ Press repeatedly to cycle through the 4 programs.
Daily Programs PROG PROG DAY PROG RETURN ■ Press to display M – F programs. NOTE: Time and Temperature display will be blank when at least one weekday program is different. ■ Press to change to Sa – Su. Again, if the display is blank, one of the weekend programs is different. ■ Press again to change to Monday’s program. ■ Continue pressing to cycle through each day. ■ Press repeatedly to cycle through the 4 programs. ■ Press to return to normal mode.
OPERATION System Selector Switch . . . I 2 7 7 70 24-25 The System Selector switch on the front of the thermostat determines the operating mode of the thermostat. You may select COOL, OFF, HEAT, AUTO. In order to take full advantage of this thermostat’s features, we recommend using the AUTO mode. Refer to the Auto Season Changeover information on page 26.
To end the Temporary Manual Override: ■ Press and wait for HOLD to display on the LCD. HOLD CLEAR ■ Press again. This will return the set temperature to the current program set temperature. NOTE: The Auto Season Changeover feature will not operate while the thermostat is in Temporary Manual Override. Refer to the Auto Season Changeover feature on page 26 for more information. NOTE: If the thermostat has not been programmed, then a Temporary Override becomes a Permanent Override.
OPERATION . . . I 2 7 7 70 26-27 Auto Season Changeover When the System Selector is in AUTO position, the thermostat will automatically change between Heating and Cooling systems, depending on your program. We recommend keeping your programmed heating and cooling temperatures at least 4°F (2°C) apart to allow the Auto Season Changeover to occur when the appropriate temperature span has been reached.
HOME TODAY HOLD CLEAR HOME TODAY ■ If Home Today is already active, you may similarly extend it to the first program of the next day by pressing the key again after the start time of the third program. ■ If the system is changed between Heat and Cool modes (either manually or by Auto Season Changeover) during the “Home Today” override period, the setpoint temperature will be automatically updated.
OPERATION Energy Monitor . . . I 2 7 7 70 The Energy monitor feature measures and stores the amount of time the heating and air conditioning system operates. Usage can be displayed for Today (since 12am), Yesterday, This Week (since Monday), Last Week (last Monday through Sunday), and ENERGY ENERGY 28-29 Total (up to 999 Hrs. 59 Min.). By monitoring your energy usage, you see how much the set-back periods are saving and you can test program adjustment to save even more. Use table on page 18.
Filter Monitor Your thermostat also keeps a record of the number of hours your filter has been in use. To maximize your system’s performance and energy efficiency, change or clean your filter regularly. ■ When the total system run time for heat and cool reaches 500 hours, M T W Th F Sa Su SET TEMP FILTER “FILT” will alternate with the current time on the LCD display to remind AM °C you to clean or change your system’s filter. “FILT” will continue to flash PM H until the counter is set back to zero.
OPERATION . . . I 2 7 7 70 30-31 Auto Recovery Hunter’s Auto Recovery feature meets the ENERGY STAR® guidelines for energy efficiency by allowing the heating or cooling system to recover gradually from an energy-saving setpoint temperature to a comfort setpoint temperature. Auto Recovery calculates how early to turn your system back On, so that the room temperature is already comfortable by the start of the comfort temperature program period. Auto Recovery works in both Heat and Cool modes.
Keyboard Lock The Keyboard can be locked to prevent unauthorized changes to the thermostat. ■ To lock or unlock the keyboard, press and hold BOTH the and M T W Th F Sa Su SET TEMP AM PM keys for 3 seconds. The keyboard is locked when LOCK appears on the display. LO : CK 1234 AUTO COOL HEAT TEMP 74 °C H °C H ■ All keys are locked, except for the LIGHT bar. Any time a key is pressed, LOCK will appear on the display for 1 second.
SAFETY FEATURES 32-33 Low Battery Warning Your thermostat has a two-stage low battery warning system. When the batteries are first detected to be weak, the first stage low battery warning is indicated by “BATT” flashing on the LCD display alternatively with the clock. You then need to replace the batteries with 2 new AA alkaline batteries. M T W Th F Sa Su SET TEMP AM PM B A :T T H °C 1234 AUTO COOL HEAT TEMP 74 °C H NOTE: The backlight will not operate in low battery condition.
Error Mode If the thermostat is unable to control your system due to an unexpected battery problem, the thermostat will enter Error Mode. In this condition, the thermostat flashes “ERR-” on the LCD display, and shuts off your system. To correct this problem, replace the batteries with 2 new AA alkaline batteries, even if you have recently replaced them. Next, use a paper clip to press the RESET button next to the keypad. You will need to reprogram your thermostat and confirm normal operation.
TROUBLESHOOTING Problem 34-35 Solution SCRAMBLED OR DOUBLE DISPLAY (numbers over numbers) 1. Remove clear mylar sticker NO DISPLAY 1. Check battery connections and batteries. 2. Press RESET button with a small pin and hold in for two seconds. ENTIRE DISPLAY DIMS 1. Replace Batteries PROGRAM DOES NOT CHANGE AT YOUR DESIRED SETTING 1. Check that the time is set properly to “AM” or “PM”. 2. Check that the thermostat is not in “HOLD” or “Home Today” modes. 3. Check for the correct day setting.
Problem (cont.) Solution (cont.) ERRATIC DISPLAY 1. Press the RESET button once with a small pin and hold for two seconds. The thermostat will need to be reprogrammed. IF UNIT CONTINUES TO OPERATE IN THE OFF POSITION 1. Replace unit. THERMOSTAT PERMANENTLY READS “HI,” “LO,” OR “ERR-” AFTER PRESSING RESET BUTTON 1. Replace unit. If you experience any other problems, call 901-745-9222 from 8 AM to 5 PM Central Time for technical assistance.
WIRING DIAGRAMS 36-37 4-wire Heat/Cool System THERMOSTAT Jumper RC RH G W Y O/B X Heat/Cool 24V Supply 5-wire Heat/Cool System Fan Relay Heat Relay or Valve Cool Contactor THERMOSTAT RC RH G W Y O/B X Cool 24V Supply X - No Connection Heat 24V Supply Fan Relay Heat Relay or Valve Cool Contactor
Single-stage Heat Pump THERMOSTAT Jumper RC RH G W Y O/B X Heat Pump 24V Supply 2-wire Heat Only Compressor Contactor THERMOSTAT RC RH X G W X Heat 24V Supply X - No Connection Fan Relay Heat Relay or Valve Y O/B X X Reversing Valve
WIRING DIAGRAMS 38 3-wire Heat Only THERMOSTAT Jumper RC RH G W X Heat 24V Supply 3-wire Cool Only Fan Relay O/B X X Y O/B Heat Relay or Valve THERMOSTAT RC RH G X Cool 24V Supply X - No Connection Y W X Fan Relay X Cool Contactor
