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Kwikot Commercial Series - User Manual

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Commercial Series
Air Source Heat Pump Water Heater
Instruction Manual
Model: GT-SKR030P
GT-SKR050P
GT-SKR070P
GT-SKR100P
GT-SKR150P
GT-SKR030B (commercial unit )
GT-SKR050B
The instructions in this manual are for the use of qualified individuals specially
trained and experienced in the installation and maintenance of this type of equipment.
Persons not qualified shall not attempt to install, service, or maintain this equipment.
Please read the manual carefully before installation.
Please keep this manual well for future reference.

Questions and Answers

  • J
    Jason StevensSep 23, 2025
    What to do if there is Environment sensor fault in my Kwikot Water Heater?
    • J
      Joseph JohnsonSep 23, 2025
      If there is an environment sensor fault (open circuit or short circuit) in your Kwikot Water Heater, it may be due to the sensor open circuit (reconnect the wirings of the sensor), the probe of the sensor falls down (retighten the probe), or the sensor short circuit (renovate wirings).
  • A
    Alejandra LeonardAug 25, 2025
    Why the compressor doesn't work in my Kwikot Water Heater?
    • M
      Makayla StewartAug 25, 2025
      If the compressor in your Kwikot Water Heater isn’t working, it could be due to a power failure (check and solve the problem), a destroyed compressor contactor (replace the contactor), poor connection (check and renovate it), overheating protection (check and solve the problems), water outlet temperature being too high (reset a proper temperature), or inadequate water-flow (clean the water filter and discharge the air in the water system).
  • J
    Joseph HerringAug 25, 2025
    Why does my Kwikot Water Heater have low heating capacity?
    • J
      John GarzaAug 26, 2025
      A low heating capacity in your Kwikot Water Heater may be due to inadequate refrigerant (leak hunting and fill in standard quantity of refrigerant), bad insulation of the water system (improve the heat insulation), drying filter stoppage (replace the drying filter), an inefficient air side heat exchanger (clean the heat exchanger), or inadequate water-flow (clean the water filter).
  • E
    emmadavisAug 27, 2025
    How to fix a Kwikot Water Heater when the fan doesn't work?
    • P
      Pamela EdwardsAug 27, 2025
      If the fan in your Kwikot Water Heater isn’t working, it could be due to a damaged capacitor (replace it), fans not being fixed well (fix it well again), a burned out electromotor (replace the electromotor), or a destroyed contactor (replace the contactor).
  • R
    randy42Aug 27, 2025
    Why is the compressor in my Kwikot Water Heater so noisy?
    • H
      Hunter DavisAug 27, 2025
      If the compressor in your Kwikot Water Heater is working but is too noisy, it might be because liquid refrigerant is entering the compressor (check the expansion valve), interior components are damaged (replace the compressor), or there's inadequate refrigeration oil (add in adequate refrigeration oil).
  • S
    Stephen OchoaSep 13, 2025
    What causes open-phase or anti-phase protection in my Kwikot Water Heater?
    • R
      Richard WashingtonSep 13, 2025
      Open-phase or anti-phase protection in your Kwikot Water Heater can be caused by issues with the three-phase power supply (check the three-phase power supply) or incorrect wiring (exchange wirings of two phases).
  • M
    Michael WilliamsSep 12, 2025
    What causes current protection to activate in my Kwikot Water Heater?
    • H
      holmeslisaSep 12, 2025
      Current protection in your Kwikot Water Heater activates when the current is excessive (check the voltage and the power source).
  • J
    jcamachoSep 12, 2025
    What causes a communication error in my Kwikot Water Heater?
    • A
      Angie NavarroSep 12, 2025
      A communication error in your Kwikot Water Heater, where the control panel can’t receive information from the PCB, is due to an open circuit or short circuit between the operation panel and PCB (renovate or replace the wire between the control panel and the PCB).
  • A
    andersonsamanthaSep 4, 2025
    What does low suction pressure indicate in my Kwikot Water Heater?
    • S
      Sharon SingletonSep 4, 2025
      Low suction pressure in your Kwikot Water Heater may indicate a drying filter stoppage (replace the filter), a lack of refrigerant (leak hunting and fill in standard quantity of refrigerant), or excessive pressure drop in the heat exchanger (check the opening of electronic expansion valve).
  • U
    uthomasSep 2, 2025
    How to troubleshoot a low pressure switch 1 fault in my Kwikot Water Heater?
    • R
      Rachael ClarkSep 2, 2025
      A low pressure switch 1 fault in your Kwikot Water Heater can occur if the low pressure switch is destroyed (replace the low pressure switch), there is inadequate refrigerant (leak hunting and fill in standard quantity of refrigerant), or the fins of the evaporator are dirty (clean the fins).

Overview

This document describes a Commercial Series Air Source Heat Pump Water Heater, available in models GT-SKR030P, GT-SKR050P, GT-SKR070P, GT-SKR100P, GT-SKR150P, GT-SKR030B (commercial unit), and GT-SKR050B.

Function Description

Air source heat pump water heaters are designed to produce hot water for various applications, including space heating, domestic hot water systems, or commercial hot water systems. The basic principle of operation is similar to an air conditioner in cooling mode, but in heating mode, the refrigerant flow is reversed. Heat is extracted from the outside air to heat air or water. The heat pump absorbs heat where it is plentiful, transports it, and releases it where it can be used for heating. This process exploits the refrigerant fluid's ability to boil from a liquid to a vapor and then condense back into a liquid, a continuous cycle while the compressor runs.

Important Technical Specifications

  • Operating Temperature Range: The unit is designed for outdoor installation. When ambient temperature is lower than 0°C, the unit should be drained to prevent ice formation. If power failure lasts more than 3-5 hours with ambient temperature below 2°C, drain water to prevent ice.
  • Water Temperature Setting: The desired water tank temperature can be set between 28-60 degrees Celsius. The unit automatically stops when the desired temperature is reached and restarts if the temperature drops by 5°C (default difference).
  • Compressor Delay Protection: A 3-minute delay is implemented for compressor start/stop to protect the compressor. The first start-up after power-on has a 1-minute delay.
  • Defrosting: Coil temperature to start defrosting is -1~-9°C (default -3°C). Coil temperature to stop defrosting is 5~25°C (default 12°C). Time interval for defrosting is 10~90 minutes (default 45 minutes). Running time of defrosting is 5-17 minutes (default 10 minutes).
  • Electrical Heating: Auxiliary electrical heating functions when ambient temperature is lower than the set temperature (default 5°C, range 0~35°C).
  • Water Return Temperature: Can be set between 28-60°C (default 40°C) for commercial units.
  • Safety Features: Includes compressor delay protection, dual pressure protection (high and low), overheating protection, anti-phase and open-phase protection, and high temperature protection. A leakage protection switch must be installed near the heat pump.
  • Water Level Control: Users can adjust high and low water levels. For pressurized water tanks, magnetic valves and high/low water level switches are not required.
  • Pipe Run Limitations: Vertical distance between the unit and water tank must be less than 6m, and horizontal distance not more than 20m.

Usage Features

  • Wide Application: Suitable for villas, factories, schools, hospitals, hotels, restaurants, swimming pools and spas, bath centers, laundries, etc.
  • Enhanced Safety: Water and electricity are completely isolated, eliminating electric shock risks. No fuel tubes or storage means no danger from oil leakage, fire, or explosion.
  • Energy-saving: Provides hot water at 1/4 the cost of electrical water heaters.
  • High Efficiency: Utilizes a super-sized evaporator coil with hydrophilic aluminum fins and rifled copper pipe, and a high-efficiency tube-in-shell heat exchanger.
  • Reliable Compressor: Equipped with world-renowned compressors (Copeland, Panasonic, Sanyo, Toshiba) for reliability, quiet operation, energy efficiency, and environmental friendliness.
  • Monoblock Design: Offers convenient installation and a neat appearance.
  • All-weather Running: Delivers reliable hot water regardless of rain, snow, or night.
  • Automatic Operation: Micro-computer controlled with timer function, allowing automatic start-up and stop based on water temperature and other conditions, eliminating the need for constant supervision.
  • Environmental Friendly: Pollution-free, reducing global greenhouse gas effects.
  • Control System: Features a PCB and operation panel with integrated functions and a large screen. Buttons can be locked/unlocked.
  • Timer Functionality: Allows setting up to three periods for unit On/Off and water supply.
  • Manual Water Supply Control: Users can manually control water supply when the water tank temperature reaches the set point.
  • Data Review: Allows reviewing actual measured data such as coil temperature, ambient temperature, water outlet temperature, and water tank temperature.
  • Fault Codes: The system displays recoverable fault codes (e.g., "01E" for overheat protection, "03E" for high pressure, "04E" for low pressure, "02E" for current issues) and sounds alarms.

Maintenance Features

  • Qualified Technician Requirement: Installation and repair must be performed by qualified technicians.
  • Power Disconnection: Always switch off and shut off power to the unit before any maintenance.
  • Cleaning: External parts can be wiped with a damp cloth and domestic cleaner. Avoid petrol, naphtha, dissolvent, or other chemicals.
  • Drainage: If the unit is shut down for a long time or ambient temperature is below 0°C, drain the water from the pipes.
  • Heat Exchanger Cleaning: Advised to clean the heat exchanger with phosphoric acid (15% consistency, 50~60℃) for 3 hours, followed by three tap water flushes. Do not use amyctic detergent.
  • Relocation: Contact the dealer or local Customer Service for assistance if the installation site needs to be changed.
  • Regular Checks: Ensure proper water flow, clear air intake/outlet paths, and functioning condensate outflow.
  • Safety Distances: Maintain adequate space around the unit for maintenance and service operations.

Kwikot Commercial Series Specifications

General IconGeneral
BrandKwikot
ModelCommercial Series
CategoryWater Heater
LanguageEnglish

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