1. Pengenalan
Thank you for choosing the WINTEMP KJU144 Tankless Electric Water Heater. This manual provides essential information for the safe installation, operation, and maintenance of your new water heater. Please read this manual thoroughly before installation and keep it for future reference. This unit is designed to provide on-demand hot water for single-point-of-use applications such as sinks, not for whole-house or shower use.

Imej 1.1: Depan view of the WINTEMP KJU144 Tankless Electric Water Heater.
2. Maklumat Keselamatan Penting
AMARAN: Pemasangan, pelarasan, pengubahan, servis atau penyelenggaraan yang tidak betul boleh menyebabkan kerosakan harta benda, kecederaan atau kematian. Baca arahan pemasangan, pengendalian dan penyelenggaraan dengan teliti sebelum memasang atau menservis peralatan ini.
- This appliance must be installed by a qualified electrician and plumber in accordance with all local electrical and plumbing codes.
- Ensure the electrical supply meets the unit's requirements: 4.4KW, 120 Volts, maximum 36 Amps. A dedicated 40 Amp double-pole breaker and 10 AWG wiring with ground are required.
- Jangan kendalikan unit jika ia rosak atau tidak berfungsi.
- Do not block or restrict water flow to or from the unit.
- The unit is equipped with overheat protection, dry-heating protection, and electricity leakage protection for user safety.
- The water connection is 1/2" NPT. This unit is not designed for shower applications.

Image 2.1: Multiple protection features for enhanced safety.
3. Kandungan Pakej
Sahkan bahawa semua komponen ada dan tidak rosak sebelum meneruskan pemasangan:
- WINTEMP KJU144 Tankless Electric Water Heater
- Rubber plug and screws for mounting
- Operation and Installation instructions manual (this document)
- Kord kuasa luaran
4. Spesifikasi Produk
| Ciri | Spesifikasi |
|---|---|
| Nombor Model | KJU144 |
| Wattage | 4.4 KW |
| Voltage | 120 Volt (AC) |
| maksimum Amppemadam | 36A |
| Pemutus yang Diperlukan | 1 x 40 Amp Double-Pole (DP) |
| Required Wiring | 10# AWG with ground |
| Dimensi Produk (W x H x D) | 8.9” x 7.7” x 3.1” |
| Sambungan Air | 1/2" NPT |
| Kadar Aliran Maksimum | 1.4 Gelen Seminit (GPM) |
| Suhu Maksimum | 121 Darjah Fahrenheit |
| Jenis Pemasangan | dinding |
| Ciri Khas | Fire-retardant ABS casing, Overheat Protection, Dry-heating Protection, Electricity Leakage Protection, Digital Display |
| Berat Barang | 5.2 paun |
5. Pemasangan
Installation must be performed by a qualified professional. Ensure all local and national electrical and plumbing codes are followed.
5.1 Senarai Semak Pra-Pemasangan
- Keperluan Elektrik: Confirm your electrical system can support a 4.4KW, 120V appliance requiring a dedicated 40 Amp double-pole breaker and 10 AWG wiring.
- Tekanan Air: Ensure water pressure is within acceptable limits (Max Operating Pressure: 90 PSI).
- lokasi: Choose a location that is protected from freezing temperatures, easily accessible for maintenance, and close to the point of use. The unit is compact and wall-mounted.
- Pelepasan: Allow adequate space around the unit for air circulation and servicing.
5.2 Memasang Unit
- Select a suitable wall location.
- Mark the mounting points using the unit as a template.
- Drill pilot holes and insert the provided rubber plugs.
- Secure the water heater to the wall using the provided screws.
5.3 Sambungan Paip
- Connect the cold water supply line to the 1/2" NPT inlet on the unit.
- Connect the hot water outlet line from the unit to the faucet using 1/2" NPT fittings.
- Pastikan semua sambungan adalah ketat dan bebas kebocoran.
- Open the hot water faucet to purge air from the system before turning on the power.
5.4 Sambungan Elektrik
- Matikan kuasa pada pemutus litar utama sebelum meneruskan.
- Connect the external power cord to the unit as per the wiring diagram.
- Connect the power cord to the dedicated 40 Amp double-pole circuit breaker. Ensure proper grounding.
- Double-check all electrical connections for tightness and correctness.

Image 5.1: Installation Guide for electrical and plumbing connections.

Image 5.2: KJU-144 Application Guidance based on inlet water temperature and fixture GPM.
6. Operasi
6.1 Permulaan Awal
- After plumbing and electrical connections are complete and checked, ensure water is flowing through the unit by opening a hot water faucet.
- Turn on the power at the main circuit breaker.
- The unit's digital display will illuminate.
6.2 Pelarasan Suhu
- Use the '+' and '-' buttons on the unit's control panel to adjust the desired water temperature. The digital display will show the set temperature.
- The unit features self-adjusting temperature control, which regulates power input based on real-time flow and temperature settings to maintain a consistent output temperature.
6.3 On-Demand Hot Water
The WINTEMP KJU144 provides hot water within approximately 3 seconds of activation, eliminating the need for preheating and ensuring a continuous supply of hot water for your sink.

Image 6.1: Features of on-demand hot water delivery.

Imej 6.2: Cthampkurang lokasi pemasangan yang sesuai.
7. Penyelenggaraan
Penyelenggaraan berkala memastikan prestasi optimum dan jangka hayat pemanas air anda.
7.1 Pembersihan
- Lap bahagian luar unit dengan lembut, damp kain. Jangan gunakan pembersih atau pelarut yang melelas.
- Ensure the digital display and control buttons are kept clean and free from debris.
7.2 Descaling (Annual)
Depending on your water quality, mineral deposits (scale) can build up inside the heating element. To descale:
- Turn off power and water supply to the unit.
- Disconnect the water lines from the unit.
- Flush the unit with a descaling solution designed for water heaters. Follow the descaling solution manufacturer's instructions carefully.
- Bilas bersih dengan air bersih.
- Reconnect water lines and restore power.
8. Penyelesaian masalah
Sebelum menghubungi sokongan, silaview isu dan penyelesaian biasa berikut:
| Masalah | Kemungkinan Punca | Penyelesaian |
|---|---|---|
| Tiada air panas / Unit tidak dipanaskan | No power; Circuit breaker tripped; Water flow too low; Overheat protection activated. | Check power supply and breaker; Ensure adequate water flow (min. 0.31 GPM); Reset unit by cycling power. |
| Air tidak cukup panas | Temperature setting too low; Inlet water temperature too cold; Water flow too high. | Increase temperature setting; Reduce water flow at the faucet; Refer to application guidance (Image 5.2). |
| Kebocoran air | Loose plumbing connections; Damaged seals or internal components. | Tighten connections; If leakage persists, turn off water and power and contact support. |
| Paparan digital tidak berfungsi | No power; Internal fault. | Check power supply; Contact support if power is present but display is off. |
9. Waranti dan Sokongan
9.1 Maklumat Waranti
The WINTEMP KJU144 Tankless Electric Water Heater comes with a Tempoh jaminan 2 tahun dari tarikh pembelian. Waranti ini melindungi kecacatan pada bahan dan mutu kerja di bawah penggunaan dan perkhidmatan biasa.
Waranti tidak melindungi kerosakan akibat:
- Pemasangan atau penyelenggaraan yang tidak betul.
- Abuse, accident, or neglect.
- Pembaikan atau pengubahsuaian yang tidak dibenarkan.
- Operation outside the specified environmental or electrical limits.
9.2 Sokongan Pelanggan
If you encounter any issues during the usage of your WINTEMP water heater or require warranty service, please contact WINTEMP customer support. You can typically find contact information through your purchase platform or the official WINTEMP webtapak.
Apabila menghubungi sokongan, sila sediakan maklumat berikut:
- Model Number: KJU144
- Tarikh Pembelian
- Penerangan mengenai isu tersebut