Gree GK-C03TC1AD - User Manual

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Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features

This document is a service manual for GREE Rooftop Packaged Air-conditioners, covering T3/R22/50&60Hz models (GC201205-I). It provides comprehensive information on product specifications, installation, and maintenance.

Function Description

The GREE Rooftop Packaged Air-conditioner series offers high operating efficiencies, with a minimum EER of 8 or above. The units are designed for on-site flexibility, featuring a compact design cabinet with a single footprint, allowing for easy placement on a standard curb. The convertible airflow design supports both side supply/return and bottom supply/return applications, maximizing field flexibility and minimizing inventory. Exclusive coil designs, utilizing grooved copper tubes and enhanced aluminum fins, improve heat transfer for maximum efficiency and durability. The top discharge condenser fan design prevents disruption to neighboring areas and landscaping, enabling compact multi-unit installations. Low operating sound levels are achieved through upward airflow and a rigid, shock-absorbing structure that reduces vibration and isolates motor sound. The compact and unitary structure facilitates transport and installation, saving indoor space. The units are available in both cooling-only and heat pump configurations.

Important Technical Specifications

The manual provides detailed product data at rated conditions for various models, ranging from 3 to 30 tons in nominal capacity.

Refrigerant: R22
Power Supply: Available in 220V, 1Ph, 60Hz; 220V, 3Ph, 60Hz; 380-415V, 3Ph, 50Hz; and 380V, 3Ph, 50Hz.
Cooling Capacity: Ranges from 35,830 Btu/h (10,500 W) for 3-ton units to 360,000 Btu/h (95,000 W) for 30-ton units.
Air Circulation: Ranges from 959 CFM (1,630 m³/h) for 3-ton units to 10,324 CFM (17,500 m³/h) for 25-ton units.
Rated ESP (External Static Pressure): Typically 0.1 in.wg (25 Pa) to 1 in.wg (250 Pa).
EER (Energy Efficiency Ratio): Generally 8 to 9 Btu/h/W.
Indoor Coil: Aluminum fin-copper tube, with face areas ranging from 3.01 sq.ft (0.28 m²) to 20.5 sq.ft (1.9 m²), and Row/FPI (Fins Per Inch) of 3/16 or 4/16.
Indoor Fan: Centrifugal type, with quantities of 1, and diameters ranging from 9 to 18 inches. Drive types include Direct and Belt. Motor outputs vary from 1/3 Hp to 15 Hp, with RPMs from 970 to 1460.
Compressor: Scroll type, with quantities of 1 or 2. Oil types include SAY56T, L-DRC/B56, SUNISO 4GSD, Mineral-160P, and POE-160SZ/Mineral-160P.
Outdoor Coil: Aluminum fin-copper tube, with face areas ranging from 7.85 sq.ft (0.73 m²) to 46.7 sq.ft (4.34 m²), and Row/FPI of 1/16, 2/16, or 3/16.
Outdoor Fan: Axial fan type, with quantities of 1 or 2. Diameters range from 23 to 31.69 inches. Drive type is Direct. Motor outputs vary from 1/3 Hp to 3 Hp, with RPMs from 710 to 1080.
Dehumidifying Capacity: Ranges from 3.6 l/h to 30 l/h.
Drain Connection Size: 3/4 inch or 1 inch.
Refrigerant Charge: Varies by model, e.g., 1.7 kg (3.75 lbs) for 3-ton units to 16+17 kg (35.27+37.48 lbs) for 30-ton units.
Refrigerant Circuit: R22/One refrigerant circuit or R22/Two independent refrigerant circuits.
Refrigerant Control: Capillary tube or Thermal Expansion Valve.
Dimensions (WDH): Ranges from 53×41.5×25.2 inches (1345×1055×640 mm) for smaller units to 112.9×83.5×89.9 inches (2870×2120×2283 mm) for larger units.
Weight (Net/Gross): Ranges from 185 kg (408 lbs) / 190 kg (419 lbs) for smaller units to 1540 kg (3395.7 lbs) / 1620 kg (3572.1 lbs) for larger units.
Filter: Washable synthetic.

Electrical data includes RLA (Rated Load Amps), LRA (Locked Rotor Amps), FLA (Full Load Amps) for compressors and fan motors, as well as maximum fuse size and minimum disconnect size.

Usage Features

The units are designed for flexible installation, either on the ground with a flat pedestal or on the roof with a roof curb. Proper installation requires ensuring adequate structural strength, ventilation, noise and vibration insulation, and protection from direct sunlight. Ductwork installation must conform to local engineering criteria, with thermal insulation for supply and intake ducts to prevent leakage and condensation. Return air filters are mandatory.

For belt-driven indoor fans (5 tons and above), belt tightness adjustment is crucial for fan velocity and stability. The manual provides guidelines for initial and routine adjustments using a densitometer.

Maintenance Features

The manual includes a detailed troubleshooting guide with a "BLE Table" and flow charts for common malfunctions such as axial flow fan not running, abnormal air flow volume, compressor not starting, unit not cooling, and noise/abnormal vibration. Each malfunction is linked to possible causes and corresponding troubleshooting steps (e.g., re-connecting power cords, repairing/replacing motors, cleaning filters, recharging refrigerant, adjusting compressor tightness).

Detailed disassembly and assembly procedures are provided for main parts, including:

Compressor: Steps for refrigerant recovery, disconnecting power cords, cutting pipes, and removing/fixing the compressor from its base.
Condenser Fan Motor: Steps for disconnecting electrical wires, removing the protection grill, taking out the fan blade, and removing/fixing the motor from its bracket.
Supply Blower Motor (3-5 Ton and 8-15 Ton): Steps for taking out the side plate, disconnecting electrical wires, disassembling the fan sub-assembly, loosening the connection between fan rotor shaft and fan blade, and removing/fixing the motor and bracket sub-assembly.
Electric Box (3-5 Ton, 8-15 Ton, and 20-30 Ton): Steps for taking out the side plate, removing the electric box cover, disconnecting all connection lines, and removing/re-installing the electric box.
Belt (8-15 Ton and 20-30 Ton): Steps for taking out the side plate, removing the belt, and re-installing the belt with proper tension adjustment.
Belt Pulley (8-15 Ton and 20-30 Ton): Steps for taking down the belt, separating the belt pulley and taper sleeve, taking out the belt pulley and taper sleeve, and re-installing them with attention to coplanarity.

The manual emphasizes safety precautions, such as ensuring power supply is cut off before maintenance, proper wire connection, and avoiding damage to components during disassembly and assembly. It also provides exploded views and part lists for various models to aid in identifying components for repair and replacement.