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DUCTLESS MINI SPLIT SYSTEM AIR CONDITIONER / HEAT PUMP
WYF-25 Inverter Series
For 9,000-24,000 BTU/hr Systems
Installation &
User's Manual
IMPORTANT NOTICE:
Please read this manual carefully before installing
or operating your new air conditioning system.
Be sure to save this manual for future reference.
CS78421-548-754
REV050423
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Summary of Contents for Pioneer WYF-25 Series
- Page 1 DUCTLESS MINI SPLIT SYSTEM AIR CONDITIONER / HEAT PUMP WYF-25 Inverter Series For 9,000-24,000 BTU/hr Systems Installation & User’s Manual CS78421-548-754 IMPORTANT NOTICE: Please read this manual carefully before installing or operating your new air conditioning system. Be sure to save this manual for future reference. REV050423...
- Page 2 Table of Contents Installation Manual Safety Precautions......1 System Components......Included Accessories...... Indoor Unit Overview..... 8 Operating Instructions..1. Remote Buttons Overview......2. Remote Controller LED Screen And Icons..3. Handling the Remote Controller....4. Controlling the System’s Airflow....5. Indoor Unit Mode Settings......6.
- Page 3 Outdoor Unit Installation....30 1. Outdoor Unit Installation Location Selection....30 2. Mounting Instructions............ 31 3. Electrical Wiring of the Outdoor Unit......32 4. Connection of Refrigerant Piping........5. Evacuating the Lineset............ Leak Check/Test Run..39 1. Electrical and Gas Leak Check....2.
- Page 4 Safety Precautions Read and Understand All Safety Precautions Prior to Installation Improper installation due to negligence of instructions may result in serious damage or injury. The magnitude of potential damages or injuries is classified as either a WARNING or a CAUTION. This symbol indicates that ignoring the related instructions may cause death, or serious injury.
- Page 5 WARNING For all electrical work, follow all local and national wiring standards, regulations, and especially this Installation Manual. You must use an independent circuit and a dedicated breaker to supply power. Do not connect other appliances to the same circuit. Insufficient electrical capacity or defects in electrical work can cause electrical shock or fire.
- Page 6 System Components High Wall-Mounted Air Conditioner The system is made up of two or more units connected together via insulated copper pipes and an electrical communication cable. The indoor unit is mounted onto one of the walls in the room that is to be conditioned. The outdoor unit is installed on the ground outside or on the wall of the dwelling using suitable mounting brackets.
- Page 7 “warranty” refer to the Standard Warranty, also as further de ned below. 2. Warranty is provided by Parker Davis HVAC International, Inc. (hereinafter referred to as PD), the supplier of Pioneer® branded Split System Heat Pump Products (hereinafter referred to as Products), covering all parts of the Products, subject to the following details: a.
- Page 8 Indoor Unit Overview Front Panel Display Meaning Symbol Description WI-FI Indicates that the unit is currently Wi-Fi Enabled SLEEP Indicates that the system is currently in SLEEP mode TIMER Indicates that the TIMER function has been set Receptor Receives incoming signals from the remote controller Temp.
- Page 9 Operating Instructions Remote Buttons Walkthrough Button Description Selects the mode of operation (Smart MODE Auto, Cool, Dry, Fan, and Heat modes) ON/OFF Turns the air conditioner on or off Configures the fan speed (Auto, High, Med, and Low) Activates/deactivates the TURBO feature, which allows the system to TURBO reach set temperatures quicker...
- Page 10 Operating Instructions Remote Controller LED Screen and Icons Overview 1 2 3 4 5 6 7 8 Description Icon Description Icon Economy Mode Indicator Fan Only Mode Smart Auto Mode Turbo Mode Indicator Dry Mode I FEEL/Follow Me Indicator Nanoe Indicator (optional) Left-Right Louver Swing 8°C/46°F Vacation Mode Up-Down Louver Swing...
- Page 11 Operating Instructions Replacement of Batteries Remove the battery cover from the rear of the remote controller, by sliding it downward in the direction of the arrow as depicted below. Install batteries according to the depicted directions (+ and -) as shown on the remote controlller. The cover then slides back into place. Use 2x AAA batteries.
- Page 12 Operating Instructions Regarding the Airflow of the Indoor Unit Filter The air that is pulled in by the fan (the “return air”) enters the grille and is passed through the filter. It is then Heat cooled/dehumidified/heated through the heat exchanger. The direction of the air output is manipulated up and down by the motorized louver, and left to right via manually controlled vertical deflectors.
- Page 13 Operating Instructions COOLING Mode Cooling mode allows the air conditioner to cool the room while also reducing the humidity of the air in the room. To put the system into cooling mode, press the button until the symbol appears on the remote’s display. TEMP The TEMP –...
- Page 14 Operating Instructions DRY Mode Dry mode is a limited function that can rapidly reduce the humidity/moisture of the room. To put the system into dry mode, press the button until the symbol appears on the remote’s display. TEMP An automatic preset of this mode is then activated.
- Page 15 Operating Instructions Changing the Fan Speed in Cool/Heat Modes The fan speed can be changed between AUTO, HIGHER, HIGH, MEDIUM, LOW, and LOWER speeds in Cool/Heat. To do so, press the button. The running fan speed can then be set. It follows the cycle of: TEMP Auto Higher...
- Page 16 Operating Instructions Energy Saver (ECO) Option In this mode, the appliance will automatically manage the operation in order to save energy. To turn the ECO feature on, press the button on the remote, and the icon will appear. The system is now running in ECO, TEMP and the process can be repeated to turn it off.
- Page 17 Operating Instructions Using the Timer - TIMER ON The TIMER feature allows you to set a time delay for the system to turn itself on or off. To set a time delay for the system to turn itself ON in X amount of hours: 1.
- Page 18 Operating Instructions 46°F Freeze Protection Function This feature is meant to be used to prevent freezing while the user is away from home. When turned on, it sets the system to keep a tem- perature of 46°F. If the unit is in standby, then the setting will automatically start the heating mode when the room temperature is equal to or lower than 46°F.
- Page 19 Operating Instructions I FEEL - To Ensure Comfort The I FEEL feature enables the remote to act as the temperature sensor and relay the current air temperature of where the remote is physically placed within the room. In some cases, this can aid with reducing thermal drift between the set temperature and the actual room temperature.
- Page 20 Operating Instructions An Important Note Regarding Operating Temperatures The system is designed to run within a certain range of temperatures, which are listed below. There are built-in protections with the system that may stop the appliance when the ambient temperatures goes outside of these ranges. Inverter Air Conditioner Operational Conditions Operating COOLING Mode...
- Page 21 Maintenance of the Air Conditioner Periodic Maintenance Is Essential For The System! Maintaining the air conditioner will ensure that is stays efficient. Before carrying out any sort of maintenance, always ensure that the power supply to the system is turned off. Indoor Unit Anti-Dust Filters (Clean once every 2 weeks) 1.
- Page 22 Indoor Unit Installation Instructions Indoor Unit Installation Location Selection Follow the below best practices for selecting an optimal space for installation the indoor unit: • DO NOT install the unit on a wall that is subject to vibrations. • DO NOT install the system near sources of heat, steam, or flammable gases. •...
- Page 23 Indoor Unit Installation Instructions Installation Diagram Before proceeding, it is important to consider the following height and length restrictions: Outdoor Unit Indoor Unit Scenario 1: Scenario 2: Outdoor Unit Above Indoor Unit Above Indoor Unit Outdoor Unit Pipe length Pipe length is 65' max is 65' max Indoor Unit...
- Page 24 Indoor Unit Installation Instructions Installation of the Mounting Plate 1. Place the included mounting plate against the wall where the system will hang that fulfills the constraints on page 22. Use a level to ensure that the plate is horizontally level. 2.
- Page 25 Indoor Unit Installation Instructions Electrical Connections - Indoor Unit All systems will include a wiring diagram affixed to the Front Panel indoor unit. See Page 44 for more details. 1. Lift up the front panel of the indoor unit. Wiring Diagram 2.
- Page 26 Indoor Unit Installation Instructions Preparing the Refrigerant Piping of the Indoor Unit The piping “pigtails” pre-attached to the indoor unit can be run in 3 different ways as shown in the illustration. Decide which type of configuration is most suitable before continuing. By default it is routed for a left side exit as shown in #1.
- Page 27 Indoor Unit Installation Instructions Connecting the Drain Hose By default, the drain hose is attached to the left-hand side of unit (”left” when facing the back of the unit). However, it can also be attached to the right-hand side. 1. To ensure proper drainage, attach the drain hose on the same side that your refrigerant piping exits the unit.
- Page 28 A simplified wiring diagram is included in the Appendix section of this manual on Page 44. On the indoor unit, the wiring diagram is located underneath the front panel as shown below: Front Panel Wiring Diagram Cable Wire Specifications (For Uncommon Configurations) Pioneer WYT Series Mini Split Sectional Area (AWG) N(L2) 14 AWG 14 AWG...
- Page 29 Indoor Unit Installation Instructions Connecting the Refrigerant Piping to the Indoor Unit Once the copper piping kit coil is unwound, refer to the below instructions to proceed: 1. Bring the ends of both the copper line and the indoor unit line together. Align the centers of the pipes that will be connected.
- Page 30 Outdoor Unit Installation Instructions Outdoor Unit Installation Location Selection Follow the below best practices for selecting an optimal space for installation the indoor unit: • DO NOT install the unit near sources of heat, steam, or flammable gases. • DO NOT install the system in areas prone to extreme winds or dust. •...
- Page 31 Outdoor Unit Installation Instructions Mounting the Outdoor Unit to the Selected Location The outdoor unit should be installed either on a pad or on a solid wall and fastened securely. Follow the procedure below before connecting any pipes or cables: •...
- Page 32 Outdoor Unit Installation Instructions BEFORE PERFORMING WARNING ANY ELECTRICAL WORK, BEFORE PERFORMING ANY ELECTRICAL READ THESE REGULATIONS OR WIRING WORK, TURN OFF THE MAIN 1. All wiring must comply with local and POWER TO THE SYSTEM. national electrical codes, and must be 1.
- Page 33 Outdoor Unit Installation Instructions Power/Signal Electrical Wiring to the Outdoor Unit On the outdoor unit, the wiring diagram is located in the inner side of the handle cover. The outside unit’s terminal block is protected by an electrical wiring cover on the side of the unit.
- Page 34 Nominal efficiency is tested on units with a pipe length of 5 meters (16 ft). Refer to the table below for specifications on the maximum length and drop height of piping. Pioneer WYF Series Mini Split 25 SEER series MODEL/Capacity (Btu/h) 3/8”...
- Page 35 Outdoor Unit Installation Instructions Step 3: Flare pipe ends PIPING EXTENSION BEYOND FLARE FORM Proper flaring is essential to achieve an airtight Outer Diameter of A (mm) seal. Pipe (mm) Min. Max. Ø 6.35 (Ø 1/4”) 0.7 (0.03”) 1.3 (0.05”) 1.
- Page 36 Outdoor Unit Installation Instructions Instructions for Connecting Piping MINIMUM BEND RADIUS to Outdoor Unit When bending connective refrigerant piping, the minimum bending radius is 10 cm (4”). 1. Unscrew the cover from the packed valve on the side of the outdoor unit. Valve Cover Radius ≥10cm (4 in) 2.
- Page 37 Outdoor Unit Installation Instructions Air Evacuation and Bleeding the Circuit The air and/or humidity left inside the refrigeration circuit can contaminate the refrigerant and cause abnormal spikes in pressure, leading to eventual compressor malfunction. Therefore, after having connected the indoor and outdoor units to create a closed system, it is necessary to bleed the air and humidity out of the circuit through the use of a vacuum pump.
- Page 38 Outdoor Unit Installation Instructions Evacuation Instructions (Cont’d) 6. Turn on the vacuum pump to evacuate the system. 7. Run the vacuum for at least 15 minutes, or until the Flare Nut Compound Meter reads -76cmHG (-100 kPa or -30 inHg). 8.
- Page 39 Electrical/Gas Leak Check and Test Run ELECTRICAL SAFETY CHECKS WARNING – RISK OF ELECTRIC SHOCK After installation, confirm that all electrical wiring is installed in accordance with local and national ALL WIRING MUST COMPLY WITH regulations, and according to the Installation LOCAL AND NATIONAL ELECTRICAL Manual.
- Page 40 Electrical/Gas Leak Check and Test Run Test Run BEFORE TEST RUN TEST RUN INSTRUCTIONS Only perform a test run after the following The following test run should be performed steps have been completed: for 30 minutes: Electrical Safety Checks 1. Connect power to the unit. ...
- Page 41 Troubleshooting MALFUNCTION POSSIBLE CAUSES There is a power failure/plug pulled out The indoor/outdoor unit fan motor was damaged There is a faulty compressor or thermomagnetic circuit breaker If the appliance There is a faulty protective device or fuses does not operate The electrical connections are loose or respond...
- Page 42 The outdoor unit can be anchored to the ground or to wall-mounted brackets. The following is a list of different outdoor unit sizes and the distance between their mounting feet. Prepare the installation base of the unit according to the dimensions found below: Pioneer WYF Series Mini Split Outdoor MODEL/Capacity (Btu/h) 510 mm...
- Page 43 Appendix Guidelines for Drilling the Wall Hole Below are the suggested locations for the wall hole for systems between 9,000 - 24,000 BTU. Both left side/right side exits are considered. Confirm holes are appropriate by corner tracing. 7/16” 1/16” 3/4” 1/16”...
- Page 44 Appendix Guidelines for Drilling the Wall Hole (continued) 1/4” 11/16” ” ” 3/16” Left Side Exit (For 24K Systems) Right Side Exit All Distances in Inches Simplified Wiring Diagram (230V) Indoor Unit Terminal Block Signal Cable to Outdoor Unit Page 44 ...
- Page 45 Appendix European Disposal Guidelines This appliance contains refrigerant and other potentially hazardous materials. When disposing of this appliance, the law requires special collection and treatment. Do not dispose of this product as household waste or unsorted municipal waste. When disposing of this appliance, you have the following options: •...
- Page 46 3250 NW 107 Avenue, Doral, FL 33172 - USA : (305) 513-4488 : (305) 513-4499 E-mail : info@pdhvac.com Website: www.pdhvac.com Pioneer product line, parts, and supplies are available online for convenient ordering at: www.highseer.com www.pioneerminisplit.com Scan the below code to visit our support page where you can find more installation materials: Copyright 2023, Parker Davis HVAC International, Inc., All rights reserved.