CAUTION: ELECTRICAL HAZARD

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1 R R Installation Guide 53DF50-HW hermostat System ypes Cool Only (single stage) Heat Pump (with electric heat) CAUION: ELECRICAL HAZARD Can cause electrical shock or equipment damage. Disconnect power before beginning installation. MERCURY NOICE: If this product is replacing a control that contains mercury in a sealed tube, do not place the old control in the trash. Contact your local waste management authority for instructions regarding recycling and proper disposal. Must be installed by a trained, experienced technician. Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous condition. Select hermostat Location Select a location for the thermostat about 5 ft (.5m) above the floor in an area with good air circulation at average temperature. Do not install the thermostat where it can be affected by: Drafts or dead spots behind doors and in corners. Hot or cold air from ducts. NO NO YES 5 FEE [.5 MEERS] NO Radiant heat from sun or appliances. Concealed pipes and chimneys. Unheated (uncooled) areas such as an outside wall behind the thermostat. M22258 U.S. Registered rademark. US Patent No. 7,4,554, 7,8,37, 7,225,054, 7,274,972, 7,636,604, 7,693,582 and other patents pending. All rights reserved

2 Installation Guide Wallplate installation. Separate wallplate from thermostat. Grasp top and bottom of wallplate and pull to remove from thermostat. 2. Install the wallplate as shown below. Drill 3/6 holes for drywall. Drill 7/32 holes for plaster. Wire hole Mounting screws Wall anchors Power options M VAC 3.0 VDC C G Y O RC R H2 NO USED G2 S M32488 For 24VAC primary power, connect common side of transformer to C terminal. Install two AA alkaline batteries on the back of the thermostat as marked M

3 53DF50-HW Wiring Leave the metal jumper wire between RC and R. SCREW INSER WIRES HEN IGHEN SCREWS WIRE HOLE Push excess wire back into wall opening. Plug wall opening with non-flammable insulation. C G Y O RC R H2 NO USED G2 S M32489A erminal Designations: R 24 Volt power Rc Not used [] C 24 Volt common H2 2nd stage heat (electric heat) Y Compressor G Low speed fan G2 High speed fan O Reversing valve for heat pumps S Remote sensor or remote setback [2] Remote sensor or remote setback [2] Notes [] Leave the metal jumper wire in place between Rc and R. [2] Sensor wire must have a cable separate from the thermostat control cable

4 Installation Guide Wiring Heat Pump with Electric Heat wiring. C G Y O RC R H2 NO USED G2 S 2 FACORY INSALLED JUMPER. JUMPER WIRE (O O Y) REQUIRED WHEN HEA PUMP INDOOR IS USED WIH COOLING ONLY OUDOOR UNI. WIRE IS FIELD SUPPLIED. INDOOR EMPERAURE SENSOR/REMOE SEBACK/CHANGEOVER PIPE SENSOR 2 H2 H W2 C O R Y Y G G2 G3 UNI ERMINAL BLOCK 2ND SAGE HEA (ELECRIC HEA) NO USED NO USED COMMON REVERSIBLE VALVE 24V POWER COMPRESSOR LOW FAN HIGH FAN AIR SWEEP FUNCION (NO AVAILABLE) M32490A Cool only wiring. C G Y H2 NO USED G2 FACORY INSALLED JUMPER. RC R S INDOOR EMPERAURE SENSOR/REMOE SEBACK/CHANGEOVER PIPE SENSOR H2 H W2 C O R Y Y G G2 G3 UNI ERMINAL BLOCK NO USED NO USED NO USED COMMON NO USED 24V POWER COMPRESSOR NO USED LOW FAN HIGH FAN AIR SWEEP FUNCION (NO AVAILABLE) M

5 53DF50-HW Sensor wiring for temperature averaging Wiring four R2 (20K ohm) Sensors. SUBBASE S R2 R2 Wiring two R2 (20K ohm) Sensors and one R2-A (0K ohm) Sensor to provide a temperature averaging network S SUBBASE R2 4 3 R2 R2 R2-A R2 M2748 HE R2-A IS A 0K OHM SENSOR. M27483 Wiring two R2-A (0K ohm) Sensors to provide a temperature averaging network. S SUBBASE Wiring four C789U (0K ohm) Sensors to provide a temperature averaging network. S SUBBASE C789 C R2-A R2-A C789 C789 HE R2-A IS A 0K OHM SENSOR. M27482 WIRES MUS HAVE A CABLE SEPARAE FROM HE HERMOSA CABLE. M

6 Installation Guide Remove tab and mount thermostat Remove tab. WALL M2802 Align pins on back of thermostat with slots in wallplate, then push gently until thermostat snaps into place. M23024 Set date and time Month Year Date ue Press GO BACK and NEX to select the Month, Year, Date, or ime function. PM Go Back Next Press DONE to save changes. Press st to change the Month, Year, Date, or ime setting. Press DONE to save and exit. M32496 Installer setup. Press SYSEM and FAN. 2. Press and hold SYSEM and DONE until the display changes. System Auto Fan Auto System Auto Fan Auto System & Fan FanUseEdit System & Fan FanUseEdit Function Setting 3. Change settings as required (see pages 7-9). Press GO BACK and NEX to select the function. AM Press st to change the setting. Press DONE to save changes. Go Back Next View Clock & More M32497

7 53DF50-HW Installer setup Setup Number Setup Name Settings & Options (factory default in bold) 020 Date (Year Upper) 20 ( ) 2 (20-278) 030 Date (Year Lower) 08 (2008) [Other options: 00-99] 040 Date (Month) 6 [Other options: -2] 050 Date (Day) 5 [Other options: -3] 060 Schedule Options 4 Programmable 0 Non-programmable 070 System Selection Cooling only 2 Heat pump plus electric heat 085 Pre-occupancy Purge Duration 0220 Cycles Per Hour (CPH) for first stage cooling/ compressor 0270 Cycles Per Hour (CPH) for heating first and second stage 0280 Continuous Backlight 0 No Yes 0300 Changeover Auto 0 Manual 0 No duration [Other options:, 2, or 3 hours] 3 Recommended for most compressors [Other options:, 2, 4, 5 or 6 CPH] 9 Recommended [Other options: 2 CPH] 030 Deadband 3 3 F (2.0 C) [Options: 2 9 F ( C)] 0320 emperature Indication Scale 0 F C 0330 Daylight Saving ime ON 0 OFF 0340 Remote emp Sensor/ Remote Setback/ Changeover Input 0340 (Nonprogrammable) Remote emp Sensor/ Remote Setback/ Changeover Input 0 None Remote 0K Indoor 2 Remote 20K Indoor 0 None Remote 0K Indoor 2 Remote 20K Indoor 5 Remote Setback, normally open 6 Remote Setback, normally closed 034 Delay for Remote Setback 0 No Delay 2 2 Minute Delay 0342 Override Option (only available in nonprogrammable mode) 0343 Unoccupied Heating Setpoint (only when remote setback enabled) Override 0 No Override F (5.5 C) [Options: F (0 8 C)] Continued on next page

8 Installation Guide Installer setup Setup Number Setup Name Settings & Options (factory default in bold) 0346 Unoccupied Cooling Setpoint (only when remote setback is enabled) F (27 C) [Options: F (24 32 C)] 0347 Fan Ramping ON 0 OFF (Lo, Med, Hi) 0348 Fan Mode 0 User can choose Cycle or Constant 3 speed: Low, Med, High, Auto Cycle Only - Auto only 0349 Auto Fan Reset 0 OFF Reset back to Auto after 2 hours 2 Reset back to Auto after 4 hours 0535 emporary Occupied Duration Limit 0540 Number of Periods 4 4 Periods 2 2 Periods 0580 Minimum Compressor Off ime 0600 Heat emperature Range Stops 060 Cool emperature Range Stops 3 hours [Other options: 0 2 hours] 3 3 minutes 4 4 minutes 5 5 minutes 0640 Clock Format 2 2 Hour Hour 0650 Extended Fan-on time Heat 0 Off seconds 0660 Extended Fan-on time Cool 0 Off seconds F (32 C) [Options: F (4 32 C)] F (0 C) [Options: F (0 37 C)] 0670 Keypad Lockout 0 Unlocked Partial Lockout : Locks out schedule and system changes 2 Partial Lockout 2: Locks out schedule, system, and fan changes 3 Partial Lockout 3: Locks out schedule, system, fan, and up/down arrow changes 4 Fully Locked: Entire interface locked/non-functional 0680 emperature Control Heat 2 Standard Less Aggressive 3 More Aggressive 0685 Recovery Heat Ramp Rate 5 5 F (2.8 C)/hour [Options: 0 20 F (0 C)] 0690 emperature Control Cool 2 Standard Less Aggressive 3 More Aggressive Continued on next page

9 53DF50-HW Installer setup Setup Number Setup Name Settings & Options (factory default in bold) 0695 Recovery Cool Ramp Rate 3 3 F (.7 C)/hour [Options: 0 20 F (0 C)] 0700 emperature Display Offset 0 0 F (0.0 C) [Options: -3 3 F (-.5 3 C)] 070 Restore Factory Defaults 0 No Yes 0720 Screen Display 2 Display Both 0 Display Room emperature Display Setpoint Installer system test During installer setup, press NEX repeatedly until est appears. est number System status AM ES AM Go Back Next View Clock & More Go Back Next View Clock & More Press st to change status Press NEX to select test M32498 Press DONE to terminate testing. System test System status Installer est Cool 0 Off Cool Stage On 2 Installer est Fan 0 Off Low 2 Med 3 High 3 Installer est Heat 0 Off Heat Stage On 2 Heat Stage 2 On 4 Installer est EM Heat 0 Off EM Heat On CAUION: EQUIPMEN DAMAGE HAZARD. Compressor protection is bypassed during testing. o prevent equipment damage, avoid cycling the compressor quickly

10 Installation Guide Special functions Fan Sequence Operations (Setup Function 0347, 0348, 0349): he thermostat comes factory default with the fan ramping algorithm enabled (ISU 347). his gives the user the ability to select Auto-Lo- Med-Hi option in ISU 348 or Auto only option in ISU 348. Auto sets the thermostat into the fan ramping algorithm mode and automatically sets the sufficient speed for PI control. Auto also automatically shuts the fan off when there is not a call for heating or cooling. If the user decides to disable ISU 347, then the fan will only have Lo-Med-Hi option available. If ISU 347 is not enabled, then ISU 348 does not appear as a user selection choice. If ISU 347 is enabled, then ISU 349 is available as a selection choice. he user can select either a 2 hour or 4 hour timer fan reset function. he fan will reset from a constant speed to auto mode after the time period expires. If ISU 347 is not enabled, then ISU 349 does not appear as a user selection choice. Auto Changeover (Setup Function 0300): When set to Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature. Compressor Protection (Setup Function 0580): Forces the compressor to wait a few minutes before restarting, to prevent damage. During this time, the message Wait flashes on the display. Special Programmable Mode Functions Installer Setup 060 allows the thermostat to be configured for either a mode with a programmable 7 day schedule or as a non-programmable thermostat. Preoccupancy purge (ISU 085): his feature is available only when the thermostat is configured as a programmable schedule and when a fan is used. he fan will run -3 hours before the occupied schedule starting time to circulate air. Override Button, emporary Override (Duration Limit ISU 0535): While in the programmable schedule mode, an override button is available to perform temporary override control. he default override time can be configured through ISU Lockout configuration via ISU 0670 can provide restrictions on access to setpoint changes, system changes, and schedule changes. No remote setback: he remote setback feature only works in the nonprogrammable mode. Special Non-Programmable Mode Functions Override (Optional): he override feature is optional in the non-programmable mode. he override can be configured through ISU When the override is activated in the non-programmable mode it will temporarily override to a new setpoint until the end time expires. Remote Setback: Remote Setback is available (ISU 0340). Occupancy sensors, manual time clock inputs, and DDC night setback can be used to provide inputs to setback the thermostat. Unoccupied heating (ISU 0343) and unoccupied cooling (ISU 0346) setpoints are available to configure the setback setpoints

11 53DF50-HW roubleshooting Symptom Possible Cause Action Display does not come on. hermostat is not being powered. Check for 24 Vac between C and R. Check that AA batteries are installed correctly and are good. emperature settings do not change. Heating or cooling does not come on. Heat does not turn on (Heat On is solid in the display). Cooling does not turn on (Cool On is solid in the display). Heat On is not in the display. Cool On is not in the display. Wait is in the display. he upper or lower temperature limits were reached. he keypad is fully locked. hermostat minimum off-time is activated. System selection not set to Heat or Cool. System type Selection is incorrect. Heating equipment failure. Loose or broken wire connection between thermostat and heating equipment. Cooling equipment failure. Loose or broken wire connection between thermostat and cooling equipment. System setting is not set to Heat and/or temperature setting is not set above room temperature. System setting is not set to Cool and/or the temperature setting is not set below room temperature. Compressor minimum off timer is active. Check temperature setpoints. Check Installer Setup Numbers 0600 and 060; modify as needed. Check Installer Setup Number 0670 to change keypad locked options. Wait up to five minutes for the system to respond. Set system Selection to correct position. Check Installer Setup Number 070 and make sure correct System type is chosen. Check for 24 Vac at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the heating equipment to find the cause of the problem. Check for 24 Vac between the heat terminal (Y and H2) and transformer common. If 24 Vac is present, the thermostat is functional. Check the heating equipment to find the cause of the problem. Check for 24 Vac between the heat terminal (Y and H2) and transformer common. If voltage is not present, check wire connection (loose or broken) between the thermostat and the heating equipment. Check for 24 Vac at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the cooling equipment to find the cause of the problem. Check for 24 Vac between the cool terminal (Y) and transformer common. If 24 Vac is present, the thermostat is functional. Check the cooling equipment to find the cause of the problem. Check for 24 Vac between the cool terminal (Y) and transformer common. If voltage is not present, check the wire connection (loose or broken) between the thermostat and the cooling equipment. Set the system setting to Heat and set the temperature setting above the room temperature. Set the system setting to Cool and set the temperature setting below the room temperature. Wait up to five minutes for the cooling or heating (heat pump) equipment to turn on

12 Installation Guide Accessories & replacement parts Please contact your distributor to order replacement parts. Indoor Sensor... Part Number P350-ISEN-CM20 Indoor Sensor... Part Number P350-ISEN-CM0 Duct Probe... Part Number P350-PRB0 Indoor Sensor... Part Number P350-ISEN-R340 Coverplate*... Part Number P350-CP-MULI *(Use to cover marks left by old thermostats.) Specifications emperature Ranges Heat: 40 to 90 F (4.5 to 32 C) Cool: 50 to 99 F (0 to 37 C) Operating Ambient emperature 0 to 20 F (-8 to 48.9 C) Shipping emperature -30 to 50 F (-34 to 66 C) Electrical Ratings erminal Voltage (50/60Hz) Running Current H2 Heating Vac A Y Cooling Vac A G Fan Vac A Operating Relative Humidity 5% to 90% (non-condensing) Physical Dimensions 3-3/4 H x 6 W x -3/8 D 95 mm H x 52 mm W x 35 mm D U.S. Registered rademark. US Patent No. 7,4,554, 7,8,37, 7,225,054, 7,274,972, 7,636,604, 7,693,582 and other patents pending M.S. Rev. 05- Printed in U.S.A. R