EQUIPMENT / EQUIPMENT FAMILY

Cling EFDR standalone glycol cooling units

Self-contained units that chill a 50% ethylene-glycol loop with an internal pump, sized from 3 to 10 kW.

From Zhengzhou Cling · Vehicle HVAC and thermal management

Product guide · HVACDeck Editorial · Sources checked 2026-10-11

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Manufacturer catalogue image · EFDR-01 / 02 / 03 / 04

01 / UNDERSTAND THE EQUIPMENT

Cling EFDR: standalone glycol cooling units, sizes, pumps and power

EFDR is Cling's standalone liquid thermal-management unit. It chills a 50% by-volume ethylene-glycol loop through an internal pump, in four sizes of 3, 5, 8 and 10 kW (EFDR-01 to -04). Cling lists it with its vehicle refrigeration products, yet the duty is a coolant circuit for a component such as a battery; cargo-box cooling is a different product. Power comes from a 600 V nominal high-voltage bus plus a 24 V nominal low-voltage supply, with R134a or R1234yf and an IP67 statement.

Cling's capacity pages disagree on two points. The 10 kW page gives pump powers of 100/240/240/300 W, while the 3–5 kW page shows a single 100 W cell across the series, and the body-size layouts differ too. No coolant temperatures, flow or pressure-loss curve is printed. With your heat load and coolant set points in hand, Cling can give the current pump selection, curve and outline drawing for your model; get these before fixing the installation.

02 / READ THE CONDITIONS

Published parameters and their scope

This is an equipment family; ask the manufacturer to select the model that matches your duty.

Family designation: EFDR-01 / 02 / 03 / 04

Swipe the table, or focus it and use arrow keys, to read the conditions and sources.

Manufacturer-published values · conditions are part of the specification
Parameter	Published value	Conditions and sources
Cooling sizes	EFDR-01/02/03/04: 3/5/8/10 kW	Ask for the coolant inlet and outlet, flow and ambient behind each rating. Source
Pump power	10 kW and 8 kW pages: 100/240/240/300 W; 3–5 kW page: merged 100 W	Request the pump for your model with its curve; motor watts do not give head. Source
Body sizes on the 10 kW page	01: 685 × 600 × 280 mm; 02/03: 818 × 600 × 280 mm; 04: 1,005 × 557 × 280 mm	The 3–5 kW page shows the smaller outline across models; get the drawing for your order. Source
Power supply	600 V nominal high voltage; 24 V nominal low voltage; low-voltage demand 450/800/800/1,000 W	The demand row is the low-voltage side; ask for compressor and total input. Source
Coolant, protection and refrigerant	50% V/V ethylene glycol; IP67 claim; R134a/R1234yf alternatives	Ask for the IP test report, coolant compatibility and which refrigerant is fitted. Source
Options and EMC	PTC 5/10/14/24 kW, expansion tank/DC supply options; EN50487:2010 named	Options are priced separately; ask for the exact EMC standard and report. Source

Selection and application

A coolant chiller, sized on liquid duty

Give the component heat-load profile, the coolant set points and the temperature and flow range it can accept. EFDR cools a secondary glycol circuit, so cargo airflow, box temperature or transport pull-down are outside its rating. Agree the thermal application and its limits with the integrator.

Ask for performance at your coolant and ambient conditions. The efficiency entry of 2.2 comes without a test basis, and −20°C to +60°C is the operating range; ask how capacity changes toward either end.

Which pump figure applies

The 10 kW and 8 kW pages give different pump powers across the models, and the 3–5 kW page merges 100 W. Ask Cling for a current written pump part list and curve for the model you order, and keep both page versions on file until it arrives.

Work out the head left at your glycol concentration and temperature after circuit losses and at the flow you need. A 300 W motor rating gives none of that. Settle circulation control, vent and fill, expansion and low-flow protection against your circuit.

Outline and liquid connections

On the 10 kW page the two middle models share 818 × 600 × 280 mm and the largest is longer and narrower. The 3–5 kW page spreads one smaller outline across models. Ask for a current assembly drawing with mounts, connection projections, ventilation and removal access.

Φ25 connections and alternative connector brands need fixing on the order interface. Confirm coolant compatibility, whether R134a or R1234yf is fitted and the service procedure. The product photo shows the fan and connection side; the model, piping diagram and expansion tank are defined by the order documents.

Power budget and heating options

The 450 to 1,000 W row is labelled low-voltage demand. Ask for the high-voltage compressor demand, auxiliary loads, start-up and protection limits and the wiring and connector file, and find out whether the unit or the vehicle provides low-voltage conversion. Calculate any COP only from figures Cling defines.

Optional PTC heaters, DC supply, a tube-fin condenser and an expansion tank belong on a selected bill of materials. Set heater duty and interlocks separately from cooling. Cling names EN50487:2010 for EMC; ask for the exact standard and the model test report before stating conformity.

EFDR against the alternatives

Request the CAN message list, fault handling, isolation and protection interfaces and a commissioning sequence. Ask for the IP67 test report and the protocol file behind the CAN self-diagnosis, and state the installation environment. Accept the unit on coolant cooling, flow and pressure, input, control faults and any heater at agreed points, after the pump and outline questions are settled. Cling's quotation sets price, availability and shipping.

EFDR standalone unit

Internal pump and glycol interfaces with the outline of the model chosen.

EDDR roof unit

Optional pump and a roof-mounted envelope; select it on its own drawing.

Cargo-box refrigeration

Needs air and box-temperature ratings, which this unit does not carry.

Settle these EFDR figures with Cling in writing

Ask Cling to confirm: capacity at your coolant temperatures, flow and ambient; the pump fitted to your model with its power and curve; the body size of that model; high-voltage and total input; the IP67 test report; the refrigerant fitted; which options are in the price; the EMC standard and report; and the CAN identifiers and fault codes.

Sources

Compiled by HVACDeck Editorial. Figures are as published by the manufacturer; ask for test records for the unit you select.

Official 10 kW capacity pageChecked 2026-10-11 · Series table with pump powers and body sizes by model.
Official 8 kW capacity pageChecked 2026-10-11 · Series table used to compare pump and body entries.
Official 3–5 kW capacity pageChecked 2026-10-11 · Series table with merged pump and outline cells.
EFDR unit photographChecked 2026-10-11 · Shows the fan and connection side of the unit.

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