EK-Classic Kit Series Installation Manual

About EKWB

EKWB is a leader in computer liquid cooling solutions, founded in 2003. Known for elegant design, attention to detail, and innovative approaches, EK products are available worldwide.

Safety Precautions

• Keep product away from children.
• Check component list and condition before installation. Contact the seller for replacements if issues arise.
• EKWB is not responsible for damages due to improper use, power issues, accidents, neglect, alteration, repair, or improper installation/testing.
• CPU and motherboard can be damaged by incorrect installation.
• Using non-EK parts with this kit may void the warranty.
• The product warranty period is 24 months.

Scope of Delivery

Detailed list of included components:

• CPU Water Block With Accessories
• Pump-Reservoir Combo With Accessories
• D-RGB Fans
• Compression Fittings
• Radiator With Screws
• Coolant Concentrate 100mL
• Tube
• ATX Bridging Plug
• AMD Mounting Kit Classic (1x)
• D-RGB Splitter Cable (1x)
• Angled Fitting (2x)
• Soft Tube Cutter (1x)
• EK-RES X3 Holder (1x)
• Multi Allen Key (1x)
• Filling Bottle 500ml (1x)
• Pump Cable Extension 500mm (1x)
• UNI Bracket
• Cable Pump Testing Adapter (1x)
• Fan Cable Y-Splitter
• Installation Manual

Required Tools

• Phillips Head Screwdriver
• Mixing Bottle
• 1L Bottle of Distilled Water
• Pair of Scissors

Radiator Space Constraint Requirements

For P240/S240 radiators, the dimensions indicate a thickness of 28mm (1.10 inches) and a length of 280mm (11.02 inches). For P360/S360 radiators, the dimensions indicate a thickness of 46mm (1.8 inches) and a length of 400mm (15.75 inches). These measurements do not include the thickness of the mounted fans.

Installation Tips for Novices

• Use distilled water (1L) to mix with the coolant concentrate. Never use tap water.
• Do not use alcohol or alcohol-based solvents, as they can damage acrylic components.
• Perform a 24-hour leak test before regular use.
• If leaks are detected, immediately turn off power.
• Optimize tube length to prevent kinking.
• Never let the pump run dry to avoid damaging its bearing.
• Periodically clean the radiator assembly using a soft brush and vacuum cleaner.

Liquid Cooling System Overview

The liquid cooling system diagram illustrates the flow of coolant. Cold air enters the radiator, where fans dissipate heat from the liquid. The cooled liquid then flows to the CPU water block to absorb heat from the CPU. From the water block, the heated liquid returns to the pump-reservoir combo unit, which circulates it back to the radiator, completing the loop.

Water Block Compatibility

The water block supports modern Intel desktop sockets (LGA-115x/1200, LGA-2066/2011(-3)) out-of-the-box. It is also compatible with AMD AMx/FMx sockets by replacing the Intel mounting plate with the included AMD mounting kit.

Installing the Water Block

For LGA-2011(-3) Socket Motherboards

1. Prepare the mounting mechanism. Install four LGA 2011 M3 thumb screws ? into the socket's integrated latch mechanism (ILM) without tools.
2. Clean the CPU's Integrated Heat Spreader (IHS) with a nonabrasive cloth. Apply a small amount of thermal compound (about two rice grains) to the IHS.
3. Remove the protective sticker from the water block cold plate. Align the water block over the mounting screws.
4. Place a compression spring ⚙️ and a thumb nut ? over each thumb screw. Fasten thumb nuts in a cross pattern, tightening them with fingers until snug.
5. Tighten the fitting barbs ? clockwise until the gasket is compressed. The port closest to the center must be used as the INLET port.

Installing the Water Block

For LGA 115X/1200 Socket Motherboards

1. Remove the motherboard from the case and place it face down.
2. Attach the rubber gasket to the metal backplate for LGA 115x/1200. Ensure the rubber gasket fits past the CPU socket ILM backplate; trim if necessary for ITX boards.
3. Place the backplate assembly onto the back of the motherboard, aligning holes.
4. Install four M3 thumb screws ? with plastic washers underneath each, screwing them into the metal backplate until snug.
5. Clean the CPU IHS and apply thermal compound.
6. Remove the water block's protective foil. Align the water block over the mounting screws.
7. Place a coiled spring ⚙️ and a thumb nut ? over each M4 thumb screw. Fasten thumb nuts with fingers until snug.
8. Tighten the fitting barbs ? clockwise until the gasket is compressed. The port closest to the center must be used as the INLET port.
9. Install the motherboard back into the computer case.

Installing the Water Block

For AMD™ Socket Motherboards

1. Replace the Intel mounting plate with the AMD mounting plate using M4x14 screws ? and a 2.5mm Allen key. Ensure correct orientation of the copper base and reseat the O-ring.
2. Remove the motherboard from the case. Remove the original plastic hold-down clamps using a Philips head screwdriver. The factory backplate can be used for mounting.
3. Clean the CPU IHS and apply thermal compound.
4. Remove the water block's protective foil. Align the water block over the mounting screws.
5. Place a coiled spring ⚙️ and a thumb screw ? over each mounting screw. Fasten thumb screws with fingers until snug.
6. Tighten the fitting barbs ? clockwise until the gasket is compressed. The port closest to the center must be used as the INLET port.
7. Install the motherboard back into the computer case.

Installing the Radiator and Fans

Fans can be mounted for exhaust (Method 1) or intake (Method 2). Ensure unidirectional airflow.

Method 1: Fans on Exhaust

1. Attach fans to the radiator using four UNC 6-32x30mm screws ? per fan. Tighten with the Allen key.
2. Prepare the PC chassis for radiator installation, aligning with pre-drilled fan-mounting holes (typically 105mm spacing for 120mm fans).
3. Align the radiator with chassis holes. Secure the radiator using four UNC 6-32 x 5mm screws ? per fan, screwing through the chassis into the radiator.
4. Install compression fittings ? onto the radiator's G1/4 ports and tighten clockwise.

Method 2: Fans on Air Inlet (Installing Radiator and Fans in One Go)

1. Prepare the PC chassis for radiator installation.
2. Align the radiator and fans with chassis holes. Secure fans to the radiator using four UNC 6-32 x 30mm screws ? per fan, screwing through the chassis and fans into the radiator.
3. Install compression fittings ? onto the radiator's G1/4 ports and tighten clockwise.

Installing the Pump-Reservoir Unit

The unit can be mounted vertically using the included UNI Bracket or Spider Bracket.

Installing to the Bottom of the Case

1. Place the pump-reservoir unit on the chosen bracket vertically. Do not install upside down.
2. Secure the unit from the back using four M4 x 10 screws ? and PVC washers with the 2.5mm Allen key.
3. Alternatively, mount directly to the chassis if a 62 x 34mm mounting pattern exists.
4. For mounting via the Spider Bracket to a 120mm fan holder: Secure the bracket to the chassis using M4 x 6 screws ? and M4 nuts with PVC washers.
5. Install fittings ? onto the pump-reservoir unit's G1/4 ports (marked IN/OUT) and tighten clockwise. Ensure correct port usage (IN/OUT).

Connecting the Tubing

The recommended loop order is Radiator Outlet → Water Block Inlet.

1. Visualize and measure the tube route, adding 2-3 cm spare length. Mark and cut tubes using the Soft Tube Cutter. Ensure tubes are not bent or twisted.
2. Remove fitting rings by rotating counter-clockwise.
3. Slide the fitting ring along the tube with the threaded side facing the fitting barb.
4. Install the tube onto the fitting barb, pushing it as far as it goes. Warm water can help.
5. Slide the fitting ring toward the barb and tighten clockwise. Repeat for all connections.

Electrical Connections

Connecting the Pump

Connect the 4-pin PWM female connector from the pump to a CPU-dedicated PWM header on the motherboard for optimal regulation.

Connecting the Fans

Use the included EK-Cable Y splitter to connect multiple fans to a single motherboard header or fan controller. Connect the female fan connectors to the splitter's male connectors. Connect the splitter to a CPU-dedicated PWM header.

Connecting D-RGB Lights

Connect the 3-pin D-RGB connectors from the pump-reservoir, water block, and fans to the motherboard's D-RGB header (+5V, Data, Empty, Ground). Ensure the arrow on the connector aligns with the +5V line on the motherboard. Incorrect connection to a 12V header will damage the LEDs. Use the 6-way D-RGB splitter cable to connect multiple components.

Recommended Filling and Leak-Testing Procedure

This procedure allows filling and leak testing with only the pump powered.

1. Disconnect all PSU power connectors (ATX, EPS, PCIe, SATA).
2. Plug the EK-ATX Bridging Plug into the 24-pin ATX PSU cable. This allows jump-starting the PSU.
3. Ensure only the pump is connected to the PSU. The system is now ready for filling and leak testing.

Filling the System for the First Time

1. Prepare the cooling liquid: Mix 100mL of coolant concentrate with 900mL of distilled water in a clean container.
2. Remove the reservoir top cover. Protect surrounding hardware with paper towels. Pour the pre-mixed coolant into the reservoir until it's about 2cm below the top.
3. Ensure the EK-ATX Bridging Plug and EK-Cable Pump Testing Adapter are connected. Turn on the PSU ⚡ briefly to run only the pump.
4. As the pump runs, coolant ? will flow. Continuously fill the reservoir while the pump is running, or cycle the PSU ON/OFF to bleed air. Fill until the coolant level is steady and about 2cm below the edge. Screw the reservoir top cover back on.
5. Tilt the PC chassis to help remove trapped air from the radiator. Add more coolant ? if needed.
6. Perform a 24-hour leak test. After a successful test, disconnect the ATX Bridging Plug and connect all PC power cables.

Draining the Loop

1. Turn off the PC and unplug the power cord. Prepare paper towels.
2. Unscrew the four (4) M4 nuts that are securing the Pump Reservoir Bracket to the PC chassis. Slowly pull the pump-reservoir unit along with the bracket outside of the case. Do not pull the tubing off the fittings at this stage.
3. Place a container under the pump-reservoir unit.
4. Unscrew the fitting ring from the outlet port of the pump-reservoir unit. Rotate the ring in the counter-clockwise direction. Gently pull the tube off the fitting and direct it into the container to drain coolant ?.
5. Disconnect the inlet port tube. Keep one tube in the container and blow into the other one to drain the system additionally.
6. Drain the pump-reservoir unit thoroughly, tilting it or removing the top cap. Dry all components.

System Expansion Possibilities

Custom loops can be expanded. A general rule is one 120mm radiator section per water-cooled component plus one additional radiator for optimal performance. For example, CPU + GPU cooling might benefit from a 360mm radiator.

1. Drain the loop if already filled.
2. Install additional components (e.g., GPU water block) according to their manuals, ensuring cold coolant reaches water blocks.
3. Determine optimal tube routing, install compatible fittings ?, and plugs.
4. Measure and cut tubing for new connections. Attach tubes to fittings and secure compression rings.
5. Check all tubing connections. Fill the system following the "Filling the System for the First Time" procedure.

Maintenance

• Dust Removal: Clean dust every 2-3 months using a vacuum cleaner or compressed air, especially the radiator. Turn off computer and unplug PSU ⚡.
• Electrical Components Check: Annually check pump and fan operation for silent running and proper PWM response.
• Unit Cleaning: Annually drain the loop, flush the radiator, check/clean the pump, and consider changing tubing.
• Part Usage: Use only genuine EK liquid cooling parts to prevent performance, compatibility, or warranty issues.

Frequently Asked Questions (FAQ)

• ❓Q: How many water blocks can be added?
  ❗A: For optimal performance: max one GPU block for S/P240 kits, max two GPU blocks for S/P360 kits.
• ❓Q: What flow rates can be expected?
  ❗A: Typically ~440L/h. Adding a GPU block drops it to ~360L/h. Two blocks drop it to ~300L/h. Run pump at 100% for higher flow rates with multiple blocks.
• ❓Q: Can Push-Pull Fan configuration be used?
  ❗A: Yes, with additional screws ? (purchased separately). Use UNC 6-32 30mm screws for standard 120x120x25mm fans.
• ❓Q: Is it possible to daisy-chain the PWM splitter?
  ❗A: Yes, additional splitters can be daisy-chained, provided the total power draw does not exceed 12W (1A on +12VDC) limit of the motherboard header.

Troubleshooting

The CPU is Overheating

Possible causes include:

• Malfunctioning Pump: Rapid temperature spikes under load. Check pump connection and liquid flow ?. Feel for vibration.
• Malfunctioning Fans: Rapid temperature spikes under load. Check fan connections and rotation.
• Kinked Tubing: Restricted flow. Check tubing for bends or obstructions.
• Clogged Microchannels: Buildup of particles in the water block. Inspect internals and clean if necessary.
• Improper Thermal Interface Material (TIM) Application: Too much or too little TIM. Refer to water block installation steps.
• Coolant Freezing: System operating below 5°C can cause freezing. Ensure ambient temperature is adequate.

Note on CPU Thermal Contact: Some CPUs have poor thermal contact between the die and IHS, leading to high temperatures even with proper cooling. This is a CPU issue, not a cooler issue. De-lidding or TIM replacement may be required, voiding CPU warranty.

The Cooler is Too Loud

Ensure fans are set to PWM control mode in UEFI/BIOS, not DC. Verify the 4-pin PWM fan connector is properly plugged into the motherboard header. Consult motherboard manual for fan speed settings.

For further assistance, consult the EK knowledge base at http://support.ekwb.com/ or contact EK Support.

Cleaning Guide

Disassembly for cleaning is permitted but voids the EK Leak-Free Guarantee.

• Cleaning Nickel-Plated Copper: Use warm water, a nonabrasive cloth, and optionally automotive metal polish. Avoid aggressive chemicals (including vinegar) and rough materials. Rinse with distilled water after cleaning. Staining from dyes is usually reversible.
• Cleaning Acrylic (Plexi) Tops: Use only warm, soapy water and a soft toothbrush. Aggressive chemicals, alcohol, or acetone will damage acrylic and void the warranty.

Preventive Steps

Use corrosion-inhibiting coolants like EK-CryoFuel, which also act as a biocide to prevent algae growth. Using coolants with corrosion, scale, and biological inhibitors is mandatory to protect nickel-plated components.