Kaidi GU Series High-Efficiency Ceiling-Mounted Evaporators with Electric Defrost
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Kaidi GU Series High-Efficiency Ceiling-Mounted Evaporators with Electric Defrost
Product Description
Kaidi GU Series High-Efficiency Evaporators
The Kaidi GU Series consists of high-efficiency ceiling-mounted evaporators designed for cold rooms, freezer rooms, food-processing facilities and cold-chain applications.
The series is available with fan diameters from 350 mm to 630 mm and with one-, two- or three-fan configurations. Fin spacings of 4.5 mm, 6.0 mm and 9.0 mm allow the evaporator to be selected for different room temperatures, humidity levels and frost conditions.
All models supplied on this product page are equipped with electric defrost. Low-power-density stainless-steel electric heaters are installed through the heat exchanger and inner drain-pan area to provide uniform defrosting and reliable low-temperature operation.
As a Kaidi distributor, we supply the GUDL, GUDD and GUDJ ranges. Model-selection support is available according to cooling load, room temperature, refrigerant, power supply and installation requirements.
Key Features
- High-efficiency ceiling-mounted evaporator
- Electric defrost included as standard
- Stainless-steel heaters installed in the coil and drain-pan area
- Fan diameters from 350 mm to 630 mm
- One-, two- or three-fan configurations
- 4.5 mm, 6.0 mm and 9.0 mm fin-spacing options
- Air throw of approximately 8–20 metres
- Powder-coated steel casing with corrosion-resistant treatment
- Optional aluminium or stainless-steel casing
- 2.0 mm alloy-aluminium tube plates
- Internally grooved heat-exchange tubes
- Triangular coil arrangement
- Sine-wave corrugated aluminium fins
- External-rotor fan motors with Class F insulation
- Fan operating-temperature range of approximately −40°C to 60°C
- Angled drain-pan structure for smooth condensate drainage
- Factory assembled and tested
- Suitable for multiple refrigeration applications
Technical Overview
| Specification | Series Data |
|---|---|
| Product type | High-efficiency ceiling-mounted evaporator / unit cooler |
| Installation | Ceiling-mounted |
| Available series | GUDL, GUDD and GUDJ |
| Defrost method | Electric defrost |
| Fan diameter | 350–630 mm |
| Fan quantity | 1, 2 or 3 |
| Air volume | Approximately 2,000–27,000 m³/h |
| Air throw | Approximately 8–20 m |
| Cooling-capacity range | Approximately 0.9–75.1 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 |
| Electric heater supply | 1-phase, 220 V, 50 Hz – catalogue standard |
| Fan motor insulation | Class F |
| Fan operating range | Approximately −40°C to 60°C |
| Refrigerants | R404A, R507A, R134a and R22 |
| Refrigerant connections | Model dependent |
| Drain connection | Approximately G3/4–G2, model dependent |
| Unit weight | Approximately 29–254 kg |
| Unit length | Approximately 912–2,751 mm |
| Unit width | Approximately 390–590 mm |
| Unit height | Approximately 526–984 mm |
| Standard casing | Powder-coated steel |
| Optional casing | Aluminium or stainless steel |
Important Technical Notice
Cooling capacity, airflow, dimensions, weight, electric-heater power, electrical data and pipe connections vary by model.
Final model selection must be confirmed according to cooling load, room temperature, evaporating temperature, refrigerant, local power supply and installation conditions.
Series and Fin Spacing
| Series | Fin Spacing | General Application |
|---|---|---|
| GUDL | 4.5 mm | Higher-temperature and fresh-storage applications |
| GUDD | 6.0 mm | Medium-temperature and general cold-storage applications |
| GUDJ | 9.0 mm | Low-temperature and freezer applications |
Fin spacing must be selected according to room temperature, relative humidity, product load and expected frost formation.
Official Cooling-Capacity Ranges
GUDL – 4.5 mm Fin Spacing
| Rating Condition | Official Capacity Range |
|---|---|
| SC1 | Approximately 3.8–75.1 kW |
| SC2 | Approximately 2.5–51.8 kW |
GUDD – 6.0 mm Fin Spacing
| Rating Condition | Official Capacity Range |
|---|---|
| SC2 | Approximately 2.1–47.2 kW |
| SC3 | Approximately 1.6–37.1 kW |
GUDJ – 9.0 mm Fin Spacing
| Rating Condition | Official Capacity Range |
|---|---|
| SC3 | Approximately 1.2–29.2 kW |
| SC4 | Approximately 1.0–23.3 kW |
| SC5 | Approximately 0.9–22.4 kW |
These ranges apply to the models published in the current Kaidi catalogue. Special distributor models require separate technical confirmation.
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.
Model Code Explanation
Example: GUDD501C
| Code | Meaning |
|---|---|
| G | G product series |
| U | Unit cooler / air cooler code |
| D | Ceiling-mounted installation |
| D | 6.0 mm fin spacing |
| 50 | 500 mm fan diameter |
| 1 | One fan |
| C | Coil specification code |
| No suffix | Electric defrost |
Other fin-spacing codes:
L = 4.5 mm
D = 6.0 mm
J = 9.0 mmElectric-defrost models do not require an additional suffix.
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 environments.
Tube Plates
The tube plates are manufactured from approximately 2.0 mm alloy aluminium. This design helps reduce wear on the copper tubes caused by thermal expansion and contraction.
Heat Exchanger
The heat exchanger uses internally grooved tubes and an optimised refrigerant-circuit layout. The triangular tube arrangement and corrugated aluminium fins are designed to improve air-side and refrigerant-side heat transfer.
Fans
The series uses external-rotor fans with Class F motor insulation. Different fan diameters and quantities are available to match the cooling capacity, airflow and air-throw requirements of each application.
Electric Defrost
Low-power-density stainless-steel electric heaters are arranged through the evaporator coil and inner drain pan. The heater layout supports uniform defrosting while helping reduce local overheating.
Drain Pan
The internal drain-pan structure is designed to reduce air bypass and improve condensate discharge. Electric heating is provided in the drain-pan area for low-temperature operation.
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
- Supermarkets
- Central kitchens
- Distribution warehouses
- Industrial refrigeration systems
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. Maximum permitted unit dimensionsOrdering Notice
All models listed on this product page are supplied with electric defrost.
Please confirm the required model, refrigerant, operating temperature, cooling capacity, electrical power supply and installation conditions before ordering.
Contact us if technical model-selection assistance is required.| GU Series |
GUDL501C – 4.5 mm Fin Spacing, GUDL501D – 4.5 mm Fin Spacing, GUDL501E – 4.5 mm Fin Spacing, GUDL601E – 4.5 mm Fin Spacing, GUDL351C – 4.5 mm Fin Spacing, GUDL352B – 4.5 mm Fin Spacing, GUDL352C – 4.5 mm Fin Spacing, GUDL402C – 4.5 mm Fin Spacing, GUDL402D – 4.5 mm Fin Spacing, GUDL452D – 4.5 mm Fin Spacing, GUDL502D – 4.5 mm Fin Spacing, GUDL552D – 4.5 mm Fin Spacing, GUDL602D – 4.5 mm Fin Spacing, GUDL602E – 4.5 mm Fin Spacing, GUDL602F – 4.5 mm Fin Spacing, GUDL632D – 4.5 mm Fin Spacing, GUDL632E – 4.5 mm Fin Spacing, GUDL603F – 4.5 mm Fin Spacing, GUDL633F – 4.5 mm Fin Spacing, GUDL633H – 4.5 mm Fin Spacing, GUDD501C – 6.0 mm Fin Spacing, GUDD501D – 6.0 mm Fin Spacing, GUDD501E – 6.0 mm Fin Spacing, GUDD601E – 6.0 mm Fin Spacing, GUDD351C – 6.0 mm Fin Spacing, GUDD352B – 6.0 mm Fin Spacing, GUDD352C – 6.0 mm Fin Spacing, GUDD402C – 6.0 mm Fin Spacing, GUDD402D – 6.0 mm Fin Spacing, GUDD452D – 6.0 mm Fin Spacing, GUDD502D – 6.0 mm Fin Spacing, GUDD552D – 6.0 mm Fin Spacing, GUDD602D – 6.0 mm Fin Spacing, GUDD602E – 6.0 mm Fin Spacing, GUDD602F – 6.0 mm Fin Spacing, GUDD632D – 6.0 mm Fin Spacing, GUDD632E – 6.0 mm Fin Spacing, GUDD603F – 6.0 mm Fin Spacing, GUDD633F – 6.0 mm Fin Spacing, GUDD633H – 6.0 mm Fin Spacing, GUDJ501C – 9.0 mm Fin Spacing, GUDJ501D – 9.0 mm Fin Spacing, GUDJ501E – 9.0 mm Fin Spacing, GUDJ601E – 9.0 mm Fin Spacing, GUDJ351C – 9.0 mm Fin Spacing, GUDJ352B – 9.0 mm Fin Spacing, GUDJ352C – 9.0 mm Fin Spacing, GUDJ402C – 9.0 mm Fin Spacing, GUDJ402D – 9.0 mm Fin Spacing, GUDJ452D – 9.0 mm Fin Spacing, GUDJ502D – 9.0 mm Fin Spacing, GUDJ552D – 9.0 mm Fin Spacing, GUDJ602D – 9.0 mm Fin Spacing, GUDJ602E – 9.0 mm Fin Spacing, GUDJ602F – 9.0 mm Fin Spacing, GUDJ632D – 9.0 mm Fin Spacing, GUDJ632E – 9.0 mm Fin Spacing, GUDJ603F – 9.0 mm Fin Spacing, GUDJ633F – 9.0 mm Fin Spacing, GUDJ633H – 9.0 mm Fin Spacing |
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