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Version 1.0Aug 2018
About the Gas Water Heater
ONSEN water heaters models
ONHW26NG50
ONHW26LP50
ONHW26NG60
ONHW26LP60
ONHW30NG60
The water heaters use gas as fuel, and can supply continuous flow of hot water for shower, washing, kitchen etc.
ONSEN gas hot water heaters MUST NOT be used for pool heating.
ONSEN hot water heaters features
Easy to operate – the operations are intelligent, automatic‐control with the advanced microcomputer chips
controlling proportional valve, infinite speed, exhaust fan speed, and heavy load combustion device.
Rainproof outdoor installation – the water heater itself is installed outdoors, with special hermitical
rainproof structures. Air for combustion is extracted from the atmosphere and the exhaust emitted back to
atmosphere.
Multiple remote controls (optional) – the hot water heater is capable of taking up to 3 remote controls
installed at different rooms at the same time. Controlling priority can be switched among all the remote
controls.
Non‐polar double frequency signal carrier remote control (optional) – the advanced method of signal carrier
& communication is used between the remote control and water heater control board. The installation is
easy and convenient by using non‐polar and low voltage wires.
Automatic error detection – when the hot water heater is in operation, the control board will monitor the
working state of control circuits, safety units, fan, proportional valve etc. if there is problem, the water
heater will stop working, and an error code will be displayed on the remote control if fitted.
Intelligent oxygen‐supply, safety protection – to ensure a complete & highly efficient combustion process is
maintained, the microcomputer will automatically detect if the oxygen content and air flow is sufficient. Fan
speed will be raised automatically to avoid incomplete combustion when there is a blockage to guarantee
smooth ventilation. When the fan speed reaches a certain point (CO boundary), the intelligent Oxygen
supply safety protection is triggered and flame is automatically extinguished.
Microcomputer smart control – the microcomputer in the water heater will work out the perfect working
parameters to ensure constant hot water temperature delivery based on input data such as inlet water
temperature, preset temperature etc.
Digital control temperature – real time temperature is monitored by a sensor probe and provides feedback
to microcomputer. An automatic adjustment of gas and air supply is maintained according to feedback data
to ensure a constant temperature of the water delivery.
High energy efficiency – the water heater microcomputer not only precisely controls the amount of supply
gas through gas regulator, it also adjusts the amount of air needed for complete combustion. ONSEN water
heaters have two built‐in functions (intensified combustion and forced heat transfer) that allow the water
heater rated efficiency to be higher than national standard requirements.
