Kaidi GU Series High-Efficiency Ceiling-Mounted Evaporators with Water Defrost
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Kaidi GU Series High-Efficiency Ceiling-Mounted Evaporators with Water Defrost
Product Description
Kaidi GU Series Water-Defrost Evaporators
The Kaidi GU Series consists of high-efficiency ceiling-mounted evaporators designed for cold rooms, freezer rooms, food-processing facilities and cold-chain refrigeration applications.
All models supplied on this product page are equipped with water defrost. The water-distribution system delivers defrost water across the heat exchanger to remove frost effectively, while the large drain-pan connections support rapid discharge of defrost water.
The available models use 500 mm, 600 mm or 630 mm fan configurations, with two, three or four fans depending on the selected model. Fin spacings of 4.5 mm, 6.0 mm and 9.0 mm are available for different operating temperatures and frost conditions.
As a Kaidi distributor, we supply the GUDL-W, GUDD-W and GUDJ-W ranges. Model-selection support is available according to cooling load, room temperature, refrigerant, power supply, defrost-water supply and drainage conditions.
Key Features
- High-efficiency ceiling-mounted evaporator
- Water-defrost system included as standard
- Uniform water distribution across the heat exchanger
- Dedicated defrost-water inlet
- Large drain connection for rapid water discharge
- 500 mm, 600 mm and 630 mm fan configurations
- Two-, three- or four-fan arrangements
- 4.5 mm, 6.0 mm and 9.0 mm fin-spacing options
- Long air throw for medium and large cold rooms
- Powder-coated steel casing
- Optional aluminium or stainless-steel casing
- Alloy-aluminium tube plates
- Internally grooved heat-exchange tubes
- Corrugated aluminium fins
- External-rotor fan motors with Class F insulation
- Angled drain-pan design
- Factory assembled and tested
- Suitable for medium- and low-temperature refrigeration
Technical Overview
| Specification | Series Data |
|---|---|
| Product type | High-efficiency ceiling-mounted evaporator / unit cooler |
| Installation | Ceiling-mounted |
| Available series | GUDL-W, GUDD-W and GUDJ-W |
| Defrost method | Water defrost |
| Fan diameter | 500 mm, 600 mm or 630 mm |
| Fan quantity | 2, 3 or 4 |
| Air volume | Approximately 11,500–27,000 m³/h |
| Air throw | Approximately 13–20 m |
| Cooling-capacity range | Approximately 6.3–75.1 kW, depending on model and rating condition |
| Fin spacing | 4.5 mm, 6.0 mm or 9.0 mm |
| Fan motor supply | 3-phase, 380 V, 50 Hz – catalogue standard |
| Defrost-water flow | Approximately 1.8–7.7 m³/h |
| Defrost-water inlet | G1-1/2 – standard catalogue models |
| Drain connection | G3 – standard catalogue models |
| Refrigerants | R404A, R507A, R134a and R22 |
| Unit weight | Approximately 115–286 kg |
| Unit length | Approximately 2,000–2,758 mm |
| Unit width | Approximately 542–682 mm |
| Unit height | Approximately 835–1,142 mm |
| Standard casing | Powder-coated steel |
| Optional casing | Aluminium or stainless steel |
Important Technical Notice
Cooling capacity, airflow, dimensions, weight, water flow, water-inlet size, drainage connection and refrigerant pipe connections vary by model.
Final selection must be confirmed according to cooling load, room temperature, evaporating temperature, refrigerant, power supply, available defrost-water pressure, water flow and drainage capacity.
Series and Fin Spacing
| Series | Fin Spacing | General Application |
|---|---|---|
| GUDL-W | 4.5 mm | Higher-temperature and fresh-storage applications |
| GUDD-W | 6.0 mm | Medium-temperature cold-storage applications |
| GUDJ-W | 9.0 mm | Low-temperature and freezer applications |
Fin spacing must be selected according to room temperature, humidity, product load and expected frost accumulation.
Model Code Explanation
Example: GUDJ633H-W
| Code | Meaning |
|---|---|
| G | G product series |
| U | Unit cooler / air cooler code |
| D | Ceiling-mounted installation |
| J | 9.0 mm fin spacing |
| 63 | 630 mm fan diameter |
| 3 | Three fans |
| H | Coil specification code |
| W | Water defrost |
Other fin-spacing codes:
L = 4.5 mm
D = 6.0 mm
J = 9.0 mmThe -W suffix must be retained because it identifies the water-defrost configuration.
Standard Rating Conditions
| Condition | Inlet Air Temperature | Evaporating Temperature | Relative Humidity | Superheat |
|---|---|---|---|---|
| SC1 | 10°C | 0°C | 85% | 6.5 K |
| SC2 | 0°C | −8°C | 85% | 5.2 K |
| SC3 | −18°C | −25°C | 95% | 4.6 K |
| SC4 | −25°C | −31°C | 95% | 3.9 K |
| SC5 | −34°C | −40°C | 95% | 3.9 K |
Cooling-capacity values must be compared under the same rating condition and refrigerant basis.
Construction and Components
Casing
The casing is manufactured from high-quality powder-coated steel for corrosion resistance. Aluminium and stainless-steel casing materials are available for special installation environments.
Heat Exchanger
The heat exchanger uses internally grooved tubes and an optimised refrigerant-circuit layout. Alloy-aluminium tube plates help protect the copper tubes against wear caused by thermal expansion and contraction.
Aluminium Fins
Corrugated aluminium fins are used to improve air turbulence and heat-transfer performance. Fin spacings of 4.5 mm, 6.0 mm and 9.0 mm are available for different operating temperatures and frost conditions.
Fans
External-rotor fans provide stable airflow and long air throw. The standard fan motors use Class F insulation and are suitable for low-temperature refrigeration environments.
Water-Defrost System
The water-defrost system distributes water across the heat exchanger to remove frost from the coil surface. Water-inlet size and required flow depend on the selected model.
The water supply must provide sufficient pressure and flow throughout the complete defrost cycle.
Drain Pan
The drain-pan structure is designed to collect and discharge condensate and defrost water efficiently. The drainage system must be sized to handle the maximum water flow during defrosting.
Refrigerant Compatibility
R404A
R507A
R134a
R22Actual cooling capacity must be corrected according to the selected refrigerant and operating condition.
Applications
- Fresh-storage cold rooms
- Chilled-food storage rooms
- Frozen-food storage rooms
- Walk-in coolers
- Walk-in freezers
- Food-processing facilities
- Cold-chain logistics centres
- Distribution warehouses
- Industrial refrigeration systems
- Applications requiring rapid removal of accumulated frost
Model Selection Information
Please provide the following information before ordering:
1. Cold-room dimensions
2. Required room temperature
3. Ambient temperature
4. Product type
5. Daily product loading quantity
6. Required cooling capacity
7. Refrigerant
8. Evaporating temperature
9. Local voltage, phase and frequency
10. Available defrost-water pressure
11. Available defrost-water flow
12. Drainage capacity
13. Maximum permitted unit dimensionsOrdering Notice
All models listed on this product page are supplied with water defrost.
Please confirm the required model, refrigerant, operating temperature, cooling capacity, electrical power supply, defrost-water pressure, water flow and drainage conditions before ordering.
Contact us if technical model-selection assistance is required.| GU Series |
GUDL502D-W – 4.5 mm Fin Spacing, GUDL602D-W – 4.5 mm Fin Spacing, GUDL602E-W – 4.5 mm Fin Spacing, GUDL602F-W – 4.5 mm Fin Spacing, GUDL632D-W – 4.5 mm Fin Spacing, GUDL632E-W – 4.5 mm Fin Spacing, GUDL603F-W – 4.5 mm Fin Spacing, GUDL633F-W – 4.5 mm Fin Spacing, GUDL633H-W – 4.5 mm Fin Spacing, GUDL503D-W – 4.5 mm Fin Spacing, GUDL503E-W – 4.5 mm Fin Spacing, GUDL503F-W – 4.5 mm Fin Spacing, GUDL503EA-W – 4.5 mm Fin Spacing, GUDL503EB-W – 4.5 mm Fin Spacing, GUDL504F-W – 4.5 mm Fin Spacing, GUDL633FA-W – 4.5 mm Fin Spacing, GUDL633HA-W – 4.5 mm Fin Spacing, GUDD502D-W – 6.0 mm Fin Spacing, GUDD602D-W – 6.0 mm Fin Spacing, GUDD602E-W – 6.0 mm Fin Spacing, GUDD602F-W – 6.0 mm Fin Spacing, GUDD632D-W – 6.0 mm Fin Spacing, GUDD632E-W – 6.0 mm Fin Spacing, GUDD603F-W – 6.0 mm Fin Spacing, GUDD633F-W – 6.0 mm Fin Spacing, GUDD633H-W – 6.0 mm Fin Spacing, GUDD503D-W – 6.0 mm Fin Spacing, GUDD503E-W – 6.0 mm Fin Spacing, GUDD503F-W – 6.0 mm Fin Spacing, GUDD503EA-W – 6.0 mm Fin Spacing, GUDD503EB-W – 6.0 mm Fin Spacing, GUDD504F-W – 6.0 mm Fin Spacing, GUDD633FA-W – 6.0 mm Fin Spacing, GUDD633HA-W – 6.0 mm Fin Spacing, GUDJ502D-W – 9.0 mm Fin Spacing, GUDJ602D-W – 9.0 mm Fin Spacing, GUDJ602E-W – 9.0 mm Fin Spacing, GUDJ602F-W – 9.0 mm Fin Spacing, GUDJ632D-W – 9.0 mm Fin Spacing, GUDJ632E-W – 9.0 mm Fin Spacing, GUDJ603F-W – 9.0 mm Fin Spacing, GUDJ633F-W – 9.0 mm Fin Spacing, GUDJ633H-W – 9.0 mm Fin Spacing, GUDJ503D-W – 9.0 mm Fin Spacing, GUDJ503E-W – 9.0 mm Fin Spacing, GUDJ503F-W – 9.0 mm Fin Spacing, GUDJ503EA-W – 9.0 mm Fin Spacing, GUDJ503EB-W – 9.0 mm Fin Spacing, GUDJ504F-W – 9.0 mm Fin Spacing, GUDJ633FA-W – 9.0 mm Fin Spacing, GUDJ633HA-W – 9.0 mm Fin Spacing |
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