Before You Start!
Your Icebound Chiller is built to keep your water clean without any extra help. Here's what you need to know before your first plunge:
Sanitation is built in. Dual-stage filtration and integrated ozone handle the work. Some popular sanitizers — including Sirona Simply Sanitizer and Ouster Cold Plunge Weekly Treatment — list most ingredients as proprietary, and we've seen corrosion issues in units where they were used. To protect your chiller, skip them.
Run it regularly. Every hour your chiller runs, water is cycling through filtration and ozone. Cold water also naturally inhibits bacterial growth, so staying at temp does double duty. Turning it off for a while? Disconnect the hoses so the unit can drain — stagnant warm water is a bacteria party you don't want.
Test your water periodically. Check pH and alkalinity to keep things balanced and your system protected.
If you really want to add a sanitizer, the only approved additive is food-grade hydrogen peroxide. If you use it, grab some water chemistry test strips to monitor levels. 👉 Quick Water Maintenance Primer
Cold weather: Don't operate in freezing conditions. Storing for the off-season? Check out our Winterization Guide.
Hold onto your crate and packaging in case your unit ever needs service or return shipping.
Icebound Chiller Technical Manual
Now let's get started! Please, follow each section as indicated.
Main Filter Assembly
1. Make sure the filter house o-ring is in place (see image).
2. Insert the filter cartridge into the clear filter housing.
3. Fill the housing halfway with water to help prime the pump.
4. Screw the housing onto the filter base by hand until snug. Use the filter wrench only if you ever need to remove it for maintenance; do not overtighten.
Strainer Installation
Chiller Inlet & Outlet
1. Wrap 2–3 layers of PTFE (Teflon) tape around the threads of both ports.
2. Install the thick o-ring provided with your chiller accessories around the inlet port. This ensures a proper seal.
Strainer Base
1. Separate the clear strainer housing from the black base.
2. Screw the black base onto the inlet port until it’s almost hand-tight.
Final Assembly
1. Attach the clear strainer container.
2. Hand-tighten the assembly.
3. Check that the clear lid is pointing to the ground (4 to 8 o'clock position is acceptable for proper water flow).
Prepare Water Hoses & Fittings
Wrap PTFE (Teflon) tape around all male threads: 2–3 layers in a clockwise direction. This helps prevent leaks and protects the threads. Avoid over-wrapping; fittings should screw in smoothly by hand before final tightening.
Check the O-rings: Must be inside both ends of each hose or on the male threads of each fitting.
Thin O-rings. Go inside the tips of your water hoses. They seal the quick-connect fittings and replace pre-installed ones if needed.
Thick O-rings. Install this on the chiller inlet port before attaching the strainer housing body. When tightened, the strainer should face downward (4–8 o’clock position).
- Install fittings and valves: Your chiller and tub boxes include fitting adapters inside each kit. We recommend using the adapters that come with your tub to connect the hoses. Hand-tighten each one into the tub’s inlet and outlet ports. Don’t overtighten.
- If your tub has a third unused port, seal it with the included plug (also wrapped with PTFE tape).
For easier maintenance, install a ball valve on each tub port. This allows you to isolate the chiller during cleaning or service.
Connect the Hoses
- First hose
- Connect from the chiller’s WATER INLET (at the strainer) to the tub’s lower port (Green to Red).
- Tip: Fill this hose with water first so the strainer is completely full. This avoids air pockets.
2. Second hose
- Connect from the chiller’s WATER OUTLET to the tub’s upper port (Red to Green).
3. Fill the tub
- Add water until it’s above both water ports before powering on.
Important Note on Hoses & Fittings
There are three correct ways to connect the tub and the chiller using the hoses.
If your model is an Endurance Plunge, you can use either connection style because your kit includes both the small fitting and the 90° elbow with the 304 stainless steel nipple.
If your model is an Immersion Plunge or Endeavor Plunge, you must use the 90° elbow with the 304 stainless steel nipple, as these models do not include the small adapter.
Startup - Technical Support
Startup Process
Power the Chiller
1. Plug into a 120 V/15 A outlet (standard U.S.).
2. Use a dedicated circuit. No power strips.
Test the Safety (GFCI) Plug
- Press Test: the light goes off.
- Press Reset: the light comes back on
Turn It On
1. Hold the unlock button on the LED panel.
2. Set your desired temperature.
3. Hold the power button to start.
4. The pump will start immediately (you’ll hear a click) and run for 30 seconds during the initial priming cycle.
Initial Prime Cycle
1. During priming, hold the red button on the main filter housing until it fills with water. The pump will run for 30 seconds, then pause for another 30.
2. One minute after startup, the pump will restart along with the fan and compressor.
Switch Between °C and °F
- Unlock the screen.
- Hold the mode (three lines) and + keys for 6 seconds.
- Use + to reach P08.
- Press unlock to edit.
- Choose: 0 = Celsius, 1 = Fahrenheit.
- Press unlock to save.
- Exit by holding mode + + for 6 seconds or wait 30 seconds.
You can also easily change the temperature unit without entering the factory settings:
- Unlock the chiller (if it's locked).
- Press and hold the “+” button and the “Unlock” button at the same time.
- Hold for about 3 seconds until the display switches between °C and °F.
That’s it; your chiller will now show temperatures in the selected unit.
Temperature Set-Point Tolerance
Your chiller uses a temperature differential (menu code F01) to avoid constant fan operation and rapid cycling. The factory default is 2 °C (≈3.6 °F).
- Example: If your target is 37 °F with the 3.6 °F default, the chiller cools to 37 °F, then the fan and compressor stop while the pump keeps running. Cooling resumes only when the water warms to 40.6 °F (target + differential).
- Startup note: If the water is 39 °F and the target is 37 °F, cooling won’t start until it reaches 40.6 °F.
For tighter control, you can lower F01 to 0.2 °C (≈0.4 °F).
A 1 °F differential keeps water between 37 °F and 38 °F.
See sections 2.5 and 3 of the technical manual for adjustment instructions.
Connecting to Wi-Fi 🛜
Download Mobile App
Start by downloading Huilian Smart (iOS & Android compatible).
Chiller Wi-Fi Status
The Wi-Fi icon at the top of your control panel tells you what's going on with your connection at a glance:
- Blinking rapidly — Ready to pair with the smart app. Go ahead and connect!
- Blinking slowly — Wi-Fi needs a reset before pairing. See the Wi-Fi Reset tab below for instructions.
- Solid — Connected and good to go.
Resetting Your Wi-Fi
- Cycle the power using the two red Test and Reset buttons on the GFCI — located on your plug or on the back of the chiller depending on your model.
- Unlock the control panel.
- Press and hold two buttons simultaneously: the left button (☰) and the bottom button ( − ).
- Hold for ~6 seconds until you hear a beep, then release. You should see the Wi-Fi icon blinking rapidly.
- Repeat step 3 — press and hold the same two buttons until you hear another beep and the Wi-Fi icon is blinking rapidly.
- You're ready to pair! Open the app and connect.
Add Chiller to the App
Connect your phone to Wi-Fi and make sure Bluetooth and location access are enabled.
- 💡 2.4GHz networks offer better range and stability, but 5GHz works too.
- Open the app and tap "Add Device" or the + button.
- Enter your Wi-Fi network password when prompted.
- The app will handle the rest — your chiller should appear as connected within a few seconds.
Frequently Asked Questions
The cooling time depends on several factors: initial water temperature, ambient temperature and humidity, and the amount of water in your tub.
- With a 100-gallon fill and room temperature water (around 70°F), you can expect:
- Initial cooldown to plunge temperature (37°F) in approximately 2.5-3 hours
- Once cold, the system maintains your desired temperature efficiently
- Our commercial-grade 1HP chiller delivers consistent, powerful cooling performance that makes your plunge ready when you need it.
Yes! The chiller is designed and certified for outdoor use as long as ambient temperatures are above freezing.
The chiller carries IPX4 water resistance certification and ETL safety certification, ensuring reliable performance in various weather conditions. You can confidently setup your chiller indoors or outdoors, knowing it meets rigorous safety and durability standards.
Our chiller’s dual sanitation system keeps your plunge water
crystal clear and hygienic.
The system features:
- A strainer for larger debris plus a 5-micron filtration (finer than many competitors' 20-micron filters) to remove particles, skin cells, and debris
- Built-in ozone generator for chemical-free sanitization
- Continuous water circulation for consistent cleanliness
For optimal performance:
- Clean the filter monthly by rinsing with water (a garden hose with a jet stream nozzle works great)
- Swap out filter for new or clean, used filter
- Change water approximately every 3-4 weeks
- Keep the tub covered when not in use
- Clean the tub's inner surface during water changes
For more details, please check The Ultimate Guide for Water Maintenance.
These alarms are safety features to protect your pump - there's no need for concern. The E11 alarm indicates low water flow, typically caused by air in the line or insufficient water flow to the pump. While E12 is temperature-related, it's often triggered by low flow conditions as well.
Check these items if you encounter either alarm:
Strainer Position and Fill
- Must be 100% full of water
- Install at approximately 90° angle with clear housing at bottom
- Incorrect orientation can trigger low flow detection
Filter Housing
- Should be completely full of water (some bubbles during operation are normal)
- If not full, press and hold the red vent button on top until water flows from the vent
Hose Connections
- Connect the chiller water inlet hose to your tub's lower water port
- Verify all connections are secure
Water Level
- Maintain water level above the port that connects to the chiller water inlet
We've got your back, and your plunge! If you encounter any issues, our dedicated in-house team will spring into action faster than you can say 'brain freeze.' We'll do whatever it takes to get you back to your icy zen.