TC-CDU-A6R In-Rack Liquid-to-Air CDU (6 kW · 6U)
Liquid-to-Air Coolant Distribution Unit · 6 kW · 6U · liquid cooling without facility water
English PDF · Free download · No form required
Edge rooms & pilot racks
How it is used
Add direct-to-chip cooling where facility water is unavailable. The room cooling system must remove the heat rejected by the CDU.
Selection checkpoint
Confirm inlet air temperature, rack space and room heat-rejection capacity.
Illustrative architecture, not a customer installation or an installation drawing.
Overview
- Liquid-to-air CDU: PG25 to the cold plates on the secondary side, heat rejected to room air by the built-in heat exchanger and fans, no facility water required
- 6 kW rated at 25 °C inlet air, 10 °C approach, 10 LPM secondary flow, variable 20–100%
- 1+1 redundant pumps with auto switchover, dual-feed ATS, leak detection, coolant quality monitoring, 25 µm filter
- PID control of both airflow and coolant flow; Modbus RTU / TCP for BMS / DCIM
- 19-inch rack, 6U, 482 × 870 × 266 mm, approx. 40 kg, IP55
- For enterprise / edge rooms without facility water, university and finance clusters, single-rack GPU pilots
Engineering fit
For enterprise / edge rooms without facility water, university and finance clusters, single-rack GPU pilots: only power and room air conditioning are needed to run direct-to-chip liquid cooling — no chilled water or cooling tower. 35 °C secondary supply is obtained from 25 °C room inlet air (10 °C approach); capacity derates with warmer room air per the selection table. Pairs with ToneCooling cold plates, manifolds and hose assemblies from the same factory.
- Enterprise / edge rooms without facility water, single GPU racks (up to about 6 kW on liquid)
- Small liquid-cooled clusters in universities and finance
- Pilots and POCs: one unit per rack, online in hours
- Smooth migration to a liquid-to-liquid CDU when facility water is added later
Key specifications
| Parameter | Specification |
|---|---|
| Rated cooling capacity | 6 kW |
| Installation | In-rack, 19-inch, 6U |
| Dimensions (W × D × H) | 482 × 870 × 266 mm |
| Weight | approx. 40 kg |
| Coolant | PG25 (25 % propylene glycol / water) |
| Power supply | AC 220 V, 50/60 Hz |
| Dual-feed ATS | Yes |
| Power consumption | < 0.3 kW |
| Ingress protection | IP55 |
| Display | 4.3″ touch HMI |
Performance & control
| Parameter | Specification |
|---|---|
| Approach temperature | 10 °C |
| Primary air in / out | 25 °C / 35 °C |
| Secondary liquid out / in | 35 °C / 45 °C |
| Secondary rated flow | 10 LPM |
| Flow range | 20–100% |
| Pump head | 25 m |
| Redundant pumps, auto switchover | 1+1 |
| Control | PID, airflow and flow vs. temperature |
| Flow check | 60,000 × 6 ÷ (1030 × 3.9 × 10 K) ≈ 9 LPM; 10 LPM rated incl. margin (ρ in kg/m³, cp in kJ/kg·K; ΔT in K) |
Monitoring · interfaces · environment
| Parameter | Specification |
|---|---|
| Leak detection | Yes |
| Coolant quality monitoring | Yes |
| Secondary filter | 25 µm |
| Bypass online-replaceable filter | No (standard on in-row models) |
| Automatic refill | No (standard on in-row models) |
| Communication | Modbus RTU & TCP/IP |
| Operating environment | −10 to 55 °C, 5–90 % RH |
| Storage environment | −45 to 70 °C, 5–93 % RH |
| Heat rejection | Built-in fans to room air; 25 °C inlet air and a return-air path required |
Note: rated at 25 °C inlet air, 35 °C secondary supply, PG25; derate per selection table for other inlet air temperatures. Platform names indicate compatibility only and imply no endorsement or partnership. Specifications subject to change.
Documents and factory tests
Supplied: dimensional / connection drawing, P&ID, Modbus register map, flow–pressure-drop curve, selection table, user manual. Factory tests: pressure hold, leak test, flow resistance at rated flow, pump / ATS switchover, leak-sensor / coolant-quality / comms check; records ship with every unit. Combined cold plate + manifold + CDU report for full-rack projects.
Compare models in this series
| Model | Capacity | Rated flow | Size / height | English datasheet |
|---|---|---|---|---|
| TC-CDU-A6R | 6 kW | 10 L/min | 6U | ↓ Download PDF |
| TC-CDU-A15R | 15 kW | 25 L/min | 10U | ↓ Download PDF |
| TC-CDU-A24R | 24 kW | 40 L/min | 15U | ↓ Download PDF |
| TC-CDU-A30R | 30 kW | 50 L/min | 20U | ↓ Download PDF |
Frequently asked questions
Under what conditions is the 6 kW rating valid?
Rated at 25 °C inlet air, 35 °C secondary supply and PG25. Usable capacity derates as room return air gets warmer; size the unit for the actual inlet air temperature.
Liquid-to-air or liquid-to-liquid CDU?
Choose liquid-to-air when the room has no chilled water or cooling tower, or when the water system must not be touched — room air conditioning removes the heat. Choose liquid-to-liquid when facility water exists and the load is large; it uses less energy per kW. Secondary connections are the same, so you can migrate later.
How much room cooling is needed?
The unit rejects the 6 kW cold-plate load into room air, so room CRAC/CRAH capacity must grow by 6 kW sensible, with hot/cold aisle airflow kept separate.
Which coolant on the secondary side?
Closed PG25 (25 % propylene glycol / water) loop with 25 µm filtration, cleaned at the factory and pre-filled on request.
Which protocols are supported?
Modbus RTU and Modbus TCP/IP are standard; the register map ships with the unit. Ask about other protocols when requesting a quote.
Lead time?
Standard units ship in 6–8 weeks; every unit ships with pressure, leak and flow-resistance test records.
Get a CDU selection review
Send your rack or loop heat load, inlet temperature, coolant, required flow, pressure drop, power supply and available space. We will confirm the model and operating conditions.
Sample lead time: 6–8 weeks. Large primary-side production units: 8–10 weeks, subject to project confirmation.
