1. Wichtige Sicherheitshinweise
Read all instructions thoroughly before installing and operating this appliance. Keep this manual for future reference. Your safety and the safety of others are very important. Follow all safety messages outlined in this manual.
- Elektrische Anforderungen: Für dieses Gerät wird eine spezielle 230-Volt/20-V-Steckdose benötigt.amp electrical outlet. Ensure proper grounding and use a dedicated circuit.
- Installation: Installation must be performed in accordance with national electrical codes by qualified personnel only. Do not attempt to install the unit yourself if you are not qualified.
- Operating Temperature for Heat Mode: The supplemental heating mode is designed to operate when outside temperatures are between 23°F and 76°F (-5°C and 24°C). It is not intended as a primary heat source during colder months.
- Kinder und Haustiere: Halten Sie Kinder und Haustiere während des Betriebs vom Gerät fern.
- Wartung: Vor der Reinigung oder Durchführung von Wartungsarbeiten muss das Gerät immer vom Stromnetz getrennt werden.
2. Produktüberschreitungview
The Keystone KSTAT12-2HD is a versatile 12,000 BTU wall-mounted air conditioner designed to provide comfort in rooms up to 550 square feet. This unit offers 4-in-1 functionality, including powerful cooling, supplemental heating, dehumidification, and fan-only operation.

Bild: Vorderseite view of the Keystone 12,000 BTU Wall Mounted Air Conditioner, showing the control panel and air vents.
Its through-the-wall design saves window space and allows for more natural light. The unit features a smart remote control with a built-in thermostat for precise temperature management and energy-saving modes like 'Energy Saver' and 'Sleep' mode, along with a programmable 24-hour timer.

Image: A graphic highlighting the unit's 4-in-1 technology: Powerful Cooling (12,000 BTU - 550 Sq. Ft.), Supplemental Heating (10,600 BTU), Air Flow (3 Fan Speeds), and Dehumidification (2.5 Pints Per Hour).

Image: The Keystone air conditioner installed in a contemporary office environment, demonstrating its integration into a living or working space.
3. Packungsinhalt
Bitte überprüfen Sie, ob alle unten aufgeführten Artikel in Ihrem Paket enthalten sind:
- Keystone Wandklimaanlage
- Fernbedienung
- 2 AAA-Batterien (für die Fernbedienung)
- Netzfilter (vorinstalliert)
- Trimmsatz
- Bedienungsanleitung (dieses Dokument)
- Garantieinformationen
4. Installation
This unit is designed for through-the-wall installation. A universal wall sleeve (24.5"-27") is required and sold separately. A trim kit is included for a finished appearance.
- Elektrischer Anschluss: The unit requires a NEMA 6-20P plug and a special 230V/20AMP electrical outlet. Ensure the outlet is properly installed and grounded. The cable length is 6.5 ft. LCDI.
- Wandhülse: Install the wall sleeve securely according to its manufacturer's instructions.
- Platzierung der Einheit: Carefully slide the air conditioner unit into the installed wall sleeve.
- Ausstattungsset: Attach the included trim kit around the unit for a neat and finished look.

Image: A graphic illustrating the easy installation process into a universal wall sleeve and the benefit of freeing up window space for natural light.

Image: A graphic showing the required NEMA 6-20P plug type for a 230V/20AMP outlet and the 6.5 ft LCDI cable length.
5. Bedienungsanleitung
Familiarize yourself with the control panel on the unit and the remote control for optimal use.
5.1. Fernbedienung
The remote control features a built-in thermostat that senses the room temperature at its location. It displays this temperature on its LCD screen and sends a signal to the AC unit every 3 minutes, ensuring accurate and precise cooling or heating based on your preferred temperature.

Image: A person comfortably operating the wall-mounted air conditioner using the remote control from a sofa.

Image: A graphic emphasizing the convenience of the built-in remote thermostat, allowing control from anywhere in the room.
5.2. Betriebsarten
- Kühlmodus: Provides 12,000 BTU of cooling capacity, suitable for rooms up to 550 square feet. Adjust the temperature setting to your desired comfort level.
- Supplemental Heating Mode: Offers 10,600 BTU of supplemental heating capacity. This mode is intended to assist your primary heating system and should be used when outside temperatures are between 23°F and 76°F.
- Entfeuchter-Modus: Removes up to 2.5 pints of moisture per hour from the air, helping to reduce humidity and improve comfort.
- Gebläsemodus: Circulates air without cooling or heating. Choose from 3 fan speeds to suit your preference.
5.3. Energiesparfunktionen
Utilize these features to optimize energy consumption and reduce operating costs:
- Energiesparmodus: The fan will cycle on and off with the compressor to conserve energy once the set temperature is reached.
- Schlafmodus: Gradually increases the room temperature over several hours to save energy while you sleep, maintaining comfort.
- 24-Stunden-Timer: Program the unit to turn on or off automatically at specific times within a 24-hour period.

Image: A visual representation of the energy-efficient Sleep Mode, which adjusts temperature for energy savings during sleep.
6. Wartung
Regelmäßige Wartung gewährleistet optimale Leistung und verlängert die Lebensdauer Ihrer Klimaanlage.
6.1. Reinigen des Luftfilters
The unit is equipped with a 'Check Filter' alert that indicates when it's time to clean the mesh filter. A clean filter is crucial for efficient operation and cleaner air circulation.
- Ausschalten: Always unplug the air conditioner before removing the filter.
- Filter entfernen: Carefully remove the mesh filter from its designated slot.
- Filter reinigen: Wash the filter with warm, soapy water. Rinse thoroughly. For heavily soiled filters, a vacuum cleaner can be used to remove loose dust before washing.
- Trockenfilter: Lassen Sie den Filter vollständig an der Luft trocknen, bevor Sie ihn wieder einsetzen. Verwenden Sie zum Trocknen keine Hitze.
- Filter neu installieren: Setzen Sie den trockenen Filter wieder in das Gerät ein.

Bild: Eine Nahaufnahme view of the washable, removable mesh filter being cleaned under running water.
6.2. Allgemeine Reinigung
Wischen Sie die Außenseite des Geräts mit einem weichen,amp Tuch. Verwenden Sie keine scharfen Chemikalien oder Scheuermittel.
7. Fehlerbehebung
If you encounter issues with your air conditioner, refer to the following common problems and solutions. For more detailed troubleshooting, consult the comprehensive manual provided with your unit or contact customer support.
- Gerät lässt sich nicht einschalten: Check if the unit is properly plugged into a 230V/20A outlet. Verify the circuit breaker has not tripped. Ensure the remote control batteries are not depleted.
- Unzureichende Kühlung/Heizung: Check if the air filter is clean. Ensure no obstructions are blocking the air intake or exhaust. Verify the temperature setting is appropriate for the desired mode. Ensure windows and doors are closed.
- Ungewöhnliche Geräusche: Some operational sounds are normal (e.g., fan, compressor starting/stopping). If you hear loud or unusual noises, unplug the unit and contact customer support.
- Wasserleck: Ensure the unit is installed with a slight tilt to allow proper drainage. Check for any blockages in the drain pan or hose.
8. Spezifikationen
Detailed technical specifications for the Keystone KSTAT12-2HD air conditioner.

Image: A diagram illustrating the physical dimensions (24.2" W x 14.5" H x 20.3" D) and weight (78.3 lbs) of the air conditioner unit.
| Besonderheit | Detail |
|---|---|
| Modellnummer | KSTAT12-2HD |
| Kühlleistung | 12,000 BTU |
| Zusätzliche Heizkapazität | 10,600 BTU |
| Abdeckungsbereich | Bis zu 550 m². |
| Entfeuchtungskapazität | 2.5 Pints/Stunde |
| Bandtage | 230 Volt |
| Wastage | 1220 Watt |
| Stromquelle | Kabelgebundene Elektrik |
| Steckertyp | NEMA 6-20P |
| Kabellänge | 6.5 ft. LCDI |
| Abmessungen (B x H x T) | 24.2 x 14.5 x 20.3 Zoll |
| Artikelgewicht | 78.3 Pfund |
| Schallpegel | 61.3 Dezibel |
| Saisonales Energieeffizienzverhältnis (SEER) | 9.5 |
| Farbe | Strahlendes Weiß |
| Material | Plastik |
| Installationsmethode | Wall (Through-the-Wall) |
| Besondere Merkmale | Luftentfeuchter, Schnellkühlung, Filterwechselanzeige, Heiz- und Kühlfunktion, Fernbedienung |

Image: A room size guide indicating that a 12,000 BTU unit is suitable for areas up to 550 square feet.
9. Garantie und Support
Your Keystone KSTAT12-2HD air conditioner comes with a comprehensive warranty:
- 1 Jahre Teile- und Arbeitsgarantie: Deckt Material- und Verarbeitungsfehler für ein Jahr ab Kaufdatum ab.
- Additional 4 Years for Sealed System: An extended warranty covers the sealed refrigeration system components for an additional four years (total of five years).
For warranty claims, technical assistance, or further support, please refer to the contact information provided in the warranty document included with your product or visit the official Keystone webWebsite.