WRT2 Wireless Programmable Thermostat The Friedrich WRT2 is a programmable, wireless electronic thermostat, which can be used with the following heating/cooling applications:
Single Stage Heat - Cool PTAC Units Singe Stage Heat Pump PTAC Units with or without Electric Heat Installation and Operation Guide Installing the Thermostat The WRT2 thermostat comes in two parts: a receiver unit that is wired to the PTAC unit and a transmitter unit that is installed on the wall and wirelessly communicates with the receiver unit. Mount Receiver Unit Thermostat Transmitter
<30 Thermostat Reciever PTAC unit. Remove the cover from the front of the PTAC Mount the receiver unit using the double-sided tape provided in the location above. Parts Diagram Pair Transmitter and Receiver Unit Transmitter HEAT 2 COOL E OFF AUTO WAIT FAN SETTINGS RESET EXIT AUTO LOW HIGH F C SAT SUN MON TUE WED THU FRI SCHED UNTIL YEAR MONTH DAY MORN DAY EVEN NIGHT AM PM SET FAN Button Up Button Down Button MODE Button Opening notch
(underneath) SETTINGS SETTINGS Mount Transmitter Unit Current time (programmable mode only) Half degree for Celsius Week Day Air Temp Thermostat mode Heating/cooling indicator Minimum off time indicator Fan status indicator F C SAT SUN MON TUE WED THU FRI SCHED UNTIL YEAR MONTH DAY MORN DAY EVEN NIGHT AM PM SET RF Status Period of Day Time of Day Lock Status HEAT 2 COOL E OFF AUTO WAIT FAN SETTINGS RESET EXIT AUTO LOW HIGH Fan speed indicator Electric Recovery indicator (HP only) Low battery indicator Date setting Set temp Receiver Receiver ID label RF pairing button Status indicator Blue = RF Red = Outputs Output wires Included in Package Thermostat transmitter Thermostat receiver Dry wall anchors and mounting screws 2 AA batteries Using the WIRING DIAGRAMS section, wire each output wire into the PTAC terminal block. Ensure that the bare end is fully seated into the connector then tighten securely. Pull gently on wires to ensure they are secure. Turn on power to PTAC unit. Use a flat head screw driver to separate the front and back housing of the transmitter. Take transmitter close to the expected install location. Within 10 minutes of returning power to the PTAC unit, insert 2xAA brand name alkaline batteries (included) into the thermostat transmitter. Important: Alkaline batteries must be replaced once every 2 years regardless of battery level. Failure to replace batteries can lead to battery acid leakage and product failure. When display says 'YES' press MODE. If only 1 receiver has been powered up within 60 feet of the thermostat transmitter within the last 10 minutes, then when this page is displayed press MODE. If multiple receivers have been powered up nearby recently or if you do not see the screen on the left, please see the RF PAIRING section for more details. Ensure that heat and cool operates correctly. Once you have confirmed operation, cut or tape-off any unused output wires coming from the receiver and replace the PTAC cover. Mount the thermostat transmitter on an inside wall about five feet above the floor in an area that has good circulation but is not directly affected by a vent or duct. Pair the transmitter and receiver, and check RF connection in desired location prior to mounting the transmitter on wall. Mark the placement of the new mounting holes through the thermostat base. Using a 3/16" drill bit, drill the holes you have marked and insert the supplied wall anchors. Use supplied screws to mount base to the wall. Return the thermostat front cabinet to its base by hooking the top first and then gently swinging the bottom of the thermostat into place. Installer Button Codes WIRING DIAGRAM: Heat Pump Function Installer menu Set time and program (installer menu 13 must be set to ON) Toggle Keypad lock/unlock Toggle EMER HEAT Start RF pairing Thermostat Mode OFF mode OFF mode HEAT / COOL mode HEAT mode OFF mode Key combination / method UP + FAN for 5s UP + MODE for 5s UP + FAN for 5s DOWN + MODE for 5s DOWN + FAN for 10s Specifications Input Voltage: 19 to 30 VAC Output Rating: Max. 1.5A per output wire (3A total) Temperature Control: 60F to 90F (16C to 32C) Safety Information This thermostat is for LOW voltage applications only. Turn OFF electricity to all heating and cooling components. All wiring must conform to applicable local and national building and electrical codes and ordinances. 53630 R W Y B GH GL C R W2 Y O/B R GH GL C Note 1: Make the following Installer Settings for Heat Pump units System Type Changeover valve type Required action Heat Pump B O 1. Set Installer Settings Menu #06 to HP 1. Set Installer Settings Menu #06 to HP 2. Set Installer Settings Menu #07 to O Note 2: When configured for Heat Pump operation, the Y wire will be energized for during both cooling and first-stage heating operation. Do not connect the W1 wire to any terminal. Note 3: The W2 wire is used to call for Electric/ Auxiliary heat. If your Heat Pump PTAC does not have Electric heat, then the W2 wire should not be used and Installer Settings menu 10 (Aux. Stage Offset) should be set to OFF. Note 4: For PTAC units with only one fan speed (single G fan terminal), use the GL wire for wiring and Installer Settings menu 12 (High Fan) must be set to OFF. WIRING DIAGRAM: Heat - Cool R W Y GH GL C R W1 Y GH GL C Note 1: If connecting to a Cool only PTAC unit, the W1 and W2 wires will not be used and Installer Settings menu 03 (Available Modes) should be set to 04: Cool Only Note 2: For PTAC units with only one fan speed (single G fan terminal), use the GL wire for wiring and Installer Settings menu Item 12 (High Fan) must be set to OFF. RF PAIRING The RF icon in the top right corner of the LCD shows the RF connection state between transmitter and receiver. BLANK: No receiver paired SOLID: Transmitter and receiver connected FLASHING: Receiver paired but disconnected When you first power up a transmitter and receiver they will be in pairing mode for 10 minutes. If you need to start the pairing process after this timeframe, follow these steps:
1. At the Receiver, use a small flat head screw driver to open the grey front cover. Hold down the RF Pairing button for 5 seconds until the Blue RF indicator LED starts to flash. 2. At the Transmitter put thermostat in OFF mode and hold FAN and DOWN buttons for 10 seconds. 3. When the screen says YES press the MODE button to start scanning process. 4. After scanning, the display will show the ID and RSSI signal strength of any receivers it has found. Match the receiver ID with the label found inside the receiver housing near to the RF Pairing button. If more than 1 receiver has been found, use the UP and DOWN buttons to select the desired Receiver. Press MODE to confirm selection or press FAN to go back. 5. If needed, steps 3 & 4 may be repeated to check signal strength in different locations. A signal strength between 40 and 70 is recommended. A signal strength between 85 and 100 may lead to connectivity problems. SETTINGS SETTINGS Receiver ID RSSI Signal Strength If the thermostat is experiencing connectivity issues or you find a signal strength of 85 to 100 during pairing, please try the following:
Move the transmitter closer to the PTAC Re-orientate the receiver within the PTAC Place the receiver outside of the PTAC INSTALLER SETTINGS HOW TO ENTER Set thermostat to OFF mode Hold UP + FAN for 5 seconds HOW TO NAVIGATE Press UP or DOWN to change setting value Press MODE to save setting value and proceed to next setting option Press FAN to return to previous setting option HOW TO EXIT Press MODE until last setting page (99) has been saved or leave thermostat with no button press Note: You must press MODE to save each setting value for 60 seconds Menu Number 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 Function Description User Option Number Temperature Scale Temperature Calibration Available modes Max Heat Set Temp Min Cool Set Temp PTAC Type HP valve type Auto dead-band between heat and cool operation in AUTO mode Stage 1 Temperature Control Swing Auxiliary Stage Cut-In Offset (only used for HP system type)
(Not Used) High FAN availability Programming mode Clock Format
(Programming mode only) Periods per day
(Programming mode only) Auto Daylight Savings
(Programming mode only)
(Not Used) Reset to default set temperatures after each mode change (manual mode only) F: Fahrenheit C: Celsius
+/- 5.4F 01 : Heat and Cool with auto 02 : Heat and Cool without auto 03 : Heat only 04 : Cool only F: 60 to 90 (5F step) F: 60 to 80 (5F step) H-C: Heat-Cool HP: Heat Pump B: B Valve O: O Valve 2 to 5F (1F step) 0.25F 0.50F 1.00F 2.25F OFF (No Electric / Auxiliary heat)
-3.0 to -8.0F (1F step) ON: High fan available OFF: High fan not available OFF: Manual ON: Programmable 12 : 12 hour 24 : 24 hour 4: 4 periods per day 2: 2 periods per day 1: 1 period per day ON: Auto DST on OFF: Auto DST off ON: uses default temperatures after each mode change (see menu 19 and 20) OFF: Maintain last set temperature for each mode Default setting F 0.0F 01 80F 65F H-C B 4F 0.50F
-4.0F ON OFF 12 2 ON ON Menu Number 19 20 21 98 99 Function Description User Option Number Default heat mode set temperature
(manual mode only) Default cool mode set temperature
(manual mode only) Start RF Pairing Minimum off time -
Compressor protection Reset 60F to Max Heat Set Temp Min Cool Set Temp to 80F NO: no action YES: start RF pairing DEL: delete the current receiver INFO: show RF status for receiver NO: Immediate off/ on switching YES: 3-minute minimum off time enforced NO: no reset YES: ex-factory reset Default setting 70F 74F NO NO NO NORMAL OPERATION CHANGING MODE Press MODE button to initiate mode selection menu Press MODE button until desired system mode is blinking. After 2 seconds of no button press desired mode is selected CHANGING SET TEMPERATURE Ensure thermostat is in correct system mode (Heat, Cool or Auto) Press UP or DOWN button. New set temperature will be displayed in large digits. After 2 seconds If Programming mode is OFF, then new set temperature will be held indefinitely. If programming mode of no button press new set temperature is selected is ON (see below), then new set temperature will be held until next scheduled set-point change CHANGING FAN SPEED Press FAN button to initiate fan speed selection menu Press FAN until desired fan mode is selected. After 2 seconds of no button press desired fan mode is selected AUTO: fan operates as needed during a call for heating or cooling activation only. LOW: fan operates continuously in low speed. Heat/Cool will turn on/off in background as needed. HIGH: fan operates continuously in high speed. Heat/Cool will turn on/off in background as needed. SETTING A KEYPAD / FRONT PANEL LOCKOUT While in any normal operating mode except OFF, a keypad lockout can be introduced which will prevent any mode change, fan change or temperature adjustment from being made by the user. Even when locked, any button press will illuminate the display backlight. To activate (and deactivate) the keypad lockout, set thermostat to heat, cool or auto mode then hold FAN + UP buttons for 5 seconds. When the keypad is locked, a padlock will appear in the lower left corner of the display. SET CLOCK AND TEMPERATURE PROGRAM SCHEDULE NOTE: After 60 seconds with no button presses thermostat will exit the settings menu Set thermostat to OFF mode and hold MODE + UP buttons for 5 seconds. From this point you have the following options Set thermostat real-time clock Set a heat schedule Set a cool schedule Use UP or DOWN buttons until desired section is blinking. Press MODE to enter selection. To exit press FAN or select Exit and press MODE ADJUSTING THE REAL-TIME CLOCK Once the real-time clock menu has been selected use the UP or DOWN buttons to set each variable. MODE will save value and proceed to next variable. FAN will return to prior variable. By default, the thermostat will automatically adjust the clock for Daylight Savings. This can be disabled by changing the Auto Daylight Savings (setting 16) option in the installer menu ADJUSTING THE HEAT OR COOL TEMPERATURE PROGRAM NOTE: Each period ends at the start time of the next upcoming period. NOTE: If configured to use only 2 periods, only DAY and NIGHT will be used, and the MORN and EVEN periods will not be used or visible. If you use 1 period and 7 day programming, then thermostat will reset to the desired set temperature at the same time each day. Once either HEAT or COOL programming sections has been selected, choose which day[s] to schedule together (i.e. all weekdays together, or each day separately). Use the UP or DOWN buttons to scroll through the blinking days and press the MODE to select each day with a indicator dot. Press FAN to deselect any previously selected day. Once all desired days are selected, move blinking selection to SCHED and press the MODE button to proceed. Press the UP or DOWN buttons to set the desired temperature for the first period. Press the MODE button to continue to the next period. Adjust the start time of the first period using UP or DOWN buttons and press the MODE button. Repeat until all periods have been set. Thermostat will return to day selection page. If all desired days have been scheduled select EXIT and press MODE. Otherwise use the UP and DOWN buttons to move blinking selection to desired days and press MODE to select day[s]
for scheduling. ENTERING EMERGENCY HEAT MODE (HP UNITS ONLY) While in HEAT mode, press DOWN + MODE for 5 seconds. The thermostat will show HEAT with E to confirm Emergency Heat mode. This will use only the W2 wire as the heating source and will not call for compressor heating. MODE and DOWN buttons for at least 5 seconds until the screen changes. The E will disappear and only show HEAT to confirm regular Heat mode. To return to normal heating mode, set thermostat to HEAT mode, press and hold BOTH the FCC Statement This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. This device must be used in fixed locations and in such a way that a separation distance of at least 20 centimeters is normally maintained between the transmitter's radiating structure(s) and the body of the user or nearby persons. IC Statement This device complies with Industry Canada licence-
exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorise aux deux conditionssuivantes :
(1) l'appareil ne doit pas produire de brouillage, et
(2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. Friedrich Air Conditioning Co. 10001 Reunion Pl Suite 500, San Antonio, TX 78216 1-877-599-5665 www.friedrich.com