Kaidi GUM Series Large Ceiling-Mounted Evaporators with Water Defrost
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Kaidi GUM Series Large Ceiling-Mounted Evaporators with Water Defrost
Product Description
Kaidi GUM Series Water-Defrost Evaporators
The Kaidi GUM Series consists of large-capacity ceiling-mounted evaporators designed for industrial cold rooms, frozen-storage warehouses and other refrigeration facilities requiring high cooling capacity and long air throw.
All models supplied on this product page are equipped with water defrost. The Kaidi water-distribution and drain-pan system is designed to distribute defrost water uniformly across the heat exchanger, support effective frost removal and reduce excessive water carryover.
The series uses 630 mm or 710 mm high-static-pressure external-rotor fans. Depending on the selected model, units are available with two, three or four fans.
Three fin-spacing configurations—4.5 mm, 6.0 mm and 9.0 mm—are available for different room temperatures, humidity levels and frost conditions.
As a Kaidi distributor, we supply the GUMDL-W, GUMDD-W and GUMDJ-W ranges. Model-selection support is available according to cooling load, room temperature, refrigerant, power supply, available defrost-water supply and installation requirements.
Key Features
- Large-capacity ceiling-mounted evaporator
- Water-defrost system included as standard
- Uniform water distribution across the heat exchanger
- Dedicated defrost-water inlet
- Large drain connections for rapid water discharge
- 630 mm or 710 mm high-static-pressure external-rotor fans
- Two-, three- or four-fan configurations
- Long air throw for large and high-ceiling cold rooms
- Powder-coated galvanized-steel casing as standard
- Optional aluminium or stainless-steel casing
- Internally grooved heat-exchange tubes
- Hydrophilic double-sine-wave aluminium fins
- 4.5 mm, 6.0 mm and 9.0 mm fin-spacing options
- Low-pressure-drop Venturi-type refrigerant distributor
- Angled drain-pan design for smooth drainage
- IP65 waterproof electrical junction box
- Standard 1/4-inch pressure access port
- Optional EC energy-saving fan motors
- Optional air-throw extension kit
- Factory cleaned, inspected and pressure-tested at 28 bar
Technical Overview
| Specification | Series Data |
|---|---|
| Product type | Large ceiling-mounted evaporator / unit cooler |
| Installation | Ceiling-mounted |
| Available series | GUMDL-W, GUMDD-W and GUMDJ-W |
| Defrost method | Water defrost |
| Fan diameter | 630 mm or 710 mm |
| Fan quantity | 2, 3 or 4 |
| Air volume | Approximately 23,500–60,000 m³/h |
| Air throw | Approximately 30–42 m |
| Heat-exchange area | Approximately 96.5–493.3 m² |
| Fin spacing | 4.5 mm, 6.0 mm or 9.0 mm |
| Fan motor supply | 3-phase, 380 V, 50 Hz – catalogue standard |
| Total fan motor power | Approximately 3.8–8.7 kW |
| Defrost-water flow | Approximately 5.6–15.2 m³/h |
| Defrost-water inlet | R 1-1/2 or multiple R 1-1/2 connections |
| Drain connection | R 3-inch or multiple R 3-inch connections |
| Refrigerants | R404A, R507A, R448A, R449A, R134a and R22 |
| Unit weight | Approximately 249–583 kg |
| Unit length | Approximately 2,710–4,610 mm |
| Unit width | Approximately 850–1,037 mm |
| Unit height | Approximately 1,140–1,276 mm |
| Junction box | IP65 |
| Factory pressure test | 28 bar |
| Standard casing | Powder-coated galvanized steel |
| Optional casing | Aluminium or stainless steel |
Important Technical Notice
Cooling capacity, airflow, dimensions, weight, defrost-water flow, water connections, electrical data and refrigerant pipe connections vary by model.
The final model must be selected according to the cooling load, room temperature, evaporating temperature, refrigerant, local power supply, water pressure, available defrost-water flow and drainage capacity.
Series and Fin Spacing
| Series | Fin Spacing | General Application |
|---|---|---|
| GUMDL-W | 4.5 mm | Higher-temperature applications with relatively limited frost formation |
| GUMDD-W | 6.0 mm | Medium- and low-temperature cold-storage applications |
| GUMDJ-W | 9.0 mm | Low-temperature and freezer applications with greater frost formation |
Final fin-spacing selection must be based on room temperature, humidity, product load, frost formation and required defrost frequency.
Model Code Explanation
Example: GUMDJ633H-W
| Code | Meaning |
|---|---|
| GUM | GUM Series |
| D | Ceiling-mounted installation |
| J | 9.0 mm fin spacing |
| 63 | 630 mm fan diameter |
| 3 | Three fan motors |
| H | Coil specification code |
| W | Water defrost |
The -W suffix must be retained because it identifies the water-defrost configuration.
Standard Rating Conditions
| Condition | Inlet Air Temperature | Evaporating Temperature | Relative Humidity |
|---|---|---|---|
| SC1 | 10°C | 0°C | 85% |
| SC2 | 0°C | −8°C | 85% |
| SC3 | −18°C | −25°C | 95% |
| SC4 | −25°C | −31°C | 95% |
| SC5 | −34°C | −40°C | 95% |
Cooling-capacity values must be compared under the same rating condition and refrigerant basis.
Construction and Components
Casing
The standard casing is manufactured from powder-coated galvanized 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 designed to improve refrigerant-side heat transfer. Aluminium end plates provide flexible tube support and help prevent direct contact between the copper tubes and steel components.
Aluminium Fins
Hydrophilic double-sine-wave aluminium fins are used to improve air-side heat transfer and optimise pressure drop. Fin spacings of 4.5 mm, 6.0 mm and 9.0 mm are available for different temperature and frost conditions.
Fans
Large-diameter external-rotor fans provide high static pressure and long air throw. The standard motors include thermal protection, and EC energy-saving fan motors are available as an optional configuration.
Water-Defrost System
The water-defrost system distributes water across the heat exchanger to remove frost from the coil surface. Defrost-water inlet size and required water flow depend on the selected model.
The available water supply must provide sufficient pressure and flow throughout the defrost cycle.
Drain Pan
The angled outer drain pan is designed for rapid water discharge without drainage dead zones. The internal drain-pan structure helps reduce air bypass and directs condensate and defrost water towards the main drain connections.
Electrical Junction Box
An IP65 waterproof junction box and waterproof cable connectors are used to support reliable electrical connections in cold and humid environments.
Refrigerant Compatibility
R404AR507AR448AR449AR134aR22
Actual cooling capacity must be corrected according to the selected refrigerant and operating condition.
Applications
- Large cold-storage warehouses
- Frozen-food storage rooms
- Food-processing facilities
- Cold-chain logistics centres
- Industrial freezer rooms
- High-ceiling cold rooms
- Facilities with an adequate defrost-water supply
- Applications requiring rapid removal of heavy frost accumulation
- Medium- and low-temperature refrigeration systems
Information Required for Model Selection
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.| GUM Series |
GUMDL632F-W – 4.5 mm Fin Spacing, GUMDL632G-W – 4.5 mm Fin Spacing, GUMDL632H-W – 4.5 mm Fin Spacing, GUMDL633F-W – 4.5 mm Fin Spacing, GUMDL633G-W – 4.5 mm Fin Spacing, GUMDL633H-W – 4.5 mm Fin Spacing, GUMDL634F-W – 4.5 mm Fin Spacing, GUMDL634G-W – 4.5 mm Fin Spacing, GUMDL634H-W – 4.5 mm Fin Spacing, GUMDL712F-W – 4.5 mm Fin Spacing, GUMDL712H-W – 4.5 mm Fin Spacing, GUMDL712J-W – 4.5 mm Fin Spacing, GUMDL713F-W – 4.5 mm Fin Spacing, GUMDL713H-W – 4.5 mm Fin Spacing, GUMDL713I-W – 4.5 mm Fin Spacing, GUMDL713H30-W – 4.5 mm Fin Spacing, GUMDD632F-W – 6.0 mm Fin Spacing, GUMDD632G-W – 6.0 mm Fin Spacing, GUMDD632H-W – 6.0 mm Fin Spacing, GUMDD633F-W – 6.0 mm Fin Spacing, GUMDD633G-W – 6.0 mm Fin Spacing, GUMDD633H-W – 6.0 mm Fin Spacing, GUMDD634F-W – 6.0 mm Fin Spacing, GUMDD634G-W – 6.0 mm Fin Spacing, GUMDD634H-W – 6.0 mm Fin Spacing, GUMDD712F-W – 6.0 mm Fin Spacing, GUMDD712H-W – 6.0 mm Fin Spacing, GUMDD712J-W – 6.0 mm Fin Spacing, GUMDD713F-W – 6.0 mm Fin Spacing, GUMDD713H-W – 6.0 mm Fin Spacing, GUMDD713I-W – 6.0 mm Fin Spacing, GUMDD713H30-W – 6.0 mm Fin Spacing, GUMDJ632F-W – 9.0 mm Fin Spacing, GUMDJ632G-W – 9.0 mm Fin Spacing, GUMDJ632H-W – 9.0 mm Fin Spacing, GUMDJ633F-W – 9.0 mm Fin Spacing, GUMDJ633G-W – 9.0 mm Fin Spacing, GUMDJ633H-W – 9.0 mm Fin Spacing, GUMDJ634F-W – 9.0 mm Fin Spacing, GUMDJ634G-W – 9.0 mm Fin Spacing, GUMDJ634H-W – 9.0 mm Fin Spacing, GUMDJ712F-W – 9.0 mm Fin Spacing, GUMDJ712H-W – 9.0 mm Fin Spacing, GUMDJ712J-W – 9.0 mm Fin Spacing, GUMDJ713F-W – 9.0 mm Fin Spacing, GUMDJ713H-W – 9.0 mm Fin Spacing, GUMDJ713I-W – 9.0 mm Fin Spacing, GUMDJ713H30-W – 9.0 mm Fin Spacing |
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