This document serves as the Technical & Service Manual for PIONEER Central Split Air Conditioners, specifically High Efficiency Air Handlers. It provides comprehensive information for the installation, operation, and maintenance of these units.
Function Description:
The PIONEER High Efficiency Air Handler is a central split air conditioning indoor unit designed for both cooling and heating applications. It is equipped with a multi-speed ECM blower motor and a TXV (Thermal Expansion Valve) metering device to support efficient temperature control. The unit is designed to work as part of a 1:1 system, meaning one indoor unit connects to one outdoor unit. Optional electric heater kits can be selected to enhance heating capabilities. The air handler is built to meet high efficiency standards, achieving up to 18 SEER (Seasonal Energy Efficiency Ratio) and up to 0.8 W.C ESP (External Static Pressure), and is in accordance with ETL AHRI certifications.
Important Technical Specifications:
Models Covered:
- DR024GHFD18HT2 (24,000 Btu/h)
- DR036GHFD18HT2 (36,000 Btu/h)
- DR048GHFD18HT2 (48,000 Btu/h)
- DR060GHFD18HT2 (60,000 Btu/h)
General Specifications:
- Refrigerant: R-410A
- Power Supply: 208~230 V, 1 Phase, 60 Hz
- Working Voltage Range: 198V~253V
- Voltage Imbalance: Within 3% deviation from each voltage at the main terminal of the outdoor unit.
- Starting Voltage: Higher than 85% of the Rated Voltage.
- Storage Condition: Temperature -13~140°F (-25~60°C), Humidity 30%~80%.
- SEER: Up to 18 (depending on model and combination).
- HSPF (Heating Seasonal Performance Factor): Up to 11 (depending on model and combination).
- Drainage Water Pipe Diameter: 3/4 inch
- Design Pressure (H/L): 3.8/1.6 MPa (550/240 PSIG)
Cooling Capacity (Rated):
- 24K: 24,000 Btu/h (Input: 2200W, Current: 9.6A)
- 36K: 36,000 Btu/h (Input: 3770W, Current: 16.5A)
- 48K: 48,000 Btu/h (Input: 4690W, Current: 21.0A)
- 60K: 56,000 Btu/h (Input: 6560W, Current: 26.8A)
Heating Capacity (Rated @ 47°F):
- 24K: 24,000 Btu/h (Input: 2000W, Current: 8.7A)
- 36K: 36,000 Btu/h (Input: 3200W, Current: 14.1A)
- 48K: 48,000 Btu/h (Input: 4260W, Current: 19.0A)
- 60K: 56,000 Btu/h (Input: 5290W, Current: 21.0A)
Indoor Coil:
- Fin Type: Hydrophilic Aluminium
- Tube Type: φ7, Innergroove Tube
- Fin Spacing: 17-18 fins per inch (depending on model)
Indoor Fan Motor (Multi-Speed ECM):
- Output: 1/3 HP to 3/4 HP (depending on model)
- Speed Range: 350-1400 r/min
- Rated Air Flow: 800 CFM to 1706 CFM (depending on model)
Dimensions (W×H×D):
- 24K/36K: 19-5/8 x 46-1/8 x 21-5/8 inches (500 x 1170 x 550 mm)
- 48K/60K: 22 x 53-7/8 x 24 inches (560 x 1370 x 610 mm)
Electrical Data:
- Nominal Current: 15A for all models
- Nominal Sensitive Current (ELB): 30mA for all models
- Power Source Cable Size: 3×16AWG
- Transmitting Cable Size: 5×16AWG
- Thermostat Signal Size: 5×18AWG/6×18AWG
- Fuse or Circuit Breaker: 15A
Usage Features:
- Compatibility: Designed for 1:1 systems, ensuring a single indoor unit connects to a single outdoor unit.
- Multi-speed ECM Blower: Allows for flexible airflow adjustments, contributing to comfort and efficiency.
- TXV Metering: Provides precise refrigerant flow control for optimal cooling and heating performance.
- Quiet Operation: Sound pressure levels range from 55 dB(A) to 65 dB(A) at high fan speed, depending on the model.
- Field Setting: DIP switches on the control board allow for static pressure settings, enabling customization of blower speed (Medium Low, Medium, Medium High, High) to match ductwork requirements and ensure proper airflow.
- Electric Heater Kits (Optional): Various electric heater kits are available (5kW, 7.5kW, 10kW, 15kW, 20kW) to augment heating capacity, with specific wiring and breaker requirements detailed in the manual. Fan speed settings must be adjusted to ensure adequate airflow for electric heating (not less than 350 CFM/TON).
Maintenance Features:
- Safety Instructions: The manual emphasizes critical safety measures, including proper grounding, using copper wires (75°C Min), ensuring air-tight refrigerant systems, and using an Electric Leakage Breaker (ELB). It warns against using flammable sprays near the unit and touching internal safety devices.
- Troubleshooting Flowcharts: Detailed flowcharts are provided for checking the refrigerant system in both cooling and heating modes, guiding technicians through steps to diagnose issues like low pressure, refrigerant leakage, blocked capillary tubes, or compressor problems.
- Component Checks: Instructions are given for checking the indoor unit fan motor, including resistance and voltage tests, to identify potential malfunctions.
- Disassembly and Assembly Procedures: Step-by-step instructions with illustrations are provided for disassembling and reassembling key components like the top panel, fan snail shell unit, and motor, facilitating maintenance and repairs. This includes guidance on unplugging motor cables, unscrewing bolts, and using appropriate tools.
- Wiring Diagrams: Comprehensive electrical wiring diagrams for the control board and common wiring are included to assist in correct installation and troubleshooting of electrical connections.
- Regular Ventilation: It is recommended to ventilate the room every 3 to 4 hours for optimal operation.
- Product Inspection: Upon receipt, users are advised to inspect for shipping damage and verify model number, electrical characteristics, and accessories.
To Next Page
Need help?
General
