Check first that every coil connection is correctly mounted.
Then do the following:
Check that the water from the open hotwater tap flows freely. without interuptions of air. Then close the hotwater tap.
After emptying the heater, the safty valve closes by turinging the wheel with the clock, og by mounting the drain plug. Close all open taps. Adjust the mixing valve to orginal setting.
The output hot water temperature of the drainage points in the housing is adjusted with the steering wheel on the mixing valve. The adjusting of the mixing valve does not affect the temperature of the hotwater of the product.
To adjust the temperature:
The heaters temperature is adjusted with help from the electrical thermostat. This is normally adjusted from 60-90 °C. The thermostat should not be adjusted lower than 65 °C to prevent bacterial growth.
To adjust the temperature:
The changing of the temperature settings on the thermostat only changes the temerature of the water in the tank. The temperature for drain points is adjusted on the mixing valve ( see installation instructions)
The products safety valve Produktets sikkerhetstermostat knocks out in risk of overheating.
This is reset by:
If the thermostat knocks out repeatedly, contact authorized installer.
Possible cause 1: It is mounted pressure reducing valve, water meter or tight setbackvalve on the main water intake of the residence. Alternatively, the cold water pressure is in the home too high during the day.
Solution: Install AX expansion tank which takes up expansion during heating and mounting / adjusting pressure reducing valve for stable water pressure into the home. Pressure reducing valve adjusted in relation to the expansion vessel preprint (usally 5 bar). Contact authorized installer.
Possible cause 2: The heaters safty valvel is worn or there are particles between membrane and valve seat due to unclean water.
Solution: try to flush through the savfty valve with water. Open the valve for about 1 minute. If the valve is stil dripping after closing the valve must be replaced. Contact authorized installer.
Possible cause 3: leakage by electric heating element.
Vertify by:
Solution if YES: change gasket / heater. Contact authorized installer.
Possible cause 1: The power supply to the water heater is broken.
Solution: Vertify by:
Possible cause 2: The electrical thermostat has turned out for security function.
Solution: Press the “RESET” button on the safety thermostat.
Possible cause 3: The thermostat DHW is defective.
Solution: Replace heating element. Contact authorized installer.
Possible cause 4: Leakage on hot water pipes in the property
Veritfy by:
If YES, there is leakage on hot water pipes or other leaks.
Solution: contact authorized installer.
Probable cause is that there is a lot of consumption of hot water in the home. (If the heater is the problem, it is not the hotwater).
Solution 1: Adjust the temperature on the thermostat to 80°C.
Solution 2: Change to a larger OSO hotwater heater. Contact authorized installer.
Possible cause 1: The mixing valve on the heater is set to low temperature.
Solution: adjust the temperature on the mixing valve:
Possible cause 2: The electrical thermostat is set to low temperature.
Solution: adjust the temperature on the thermostat to 80 °C.
Possible cause 3: There are estimates in the crane (s) from cold water to hot water (suddenly cold or hot water in the crane).
Solution: contact authorized installer.
Possible cause is incorrect on the heaters’s electrical system.
Verify by:
Break electrical supply
Unscrew the electric lid in front of the electrical central
If YES, contact OSO or authorized electrician for inspection or remediation. Fit the electric lid.
Often this occurs because there are long pipes (distance) from the hotwater heater to the drainage point.
Solution: Mount a hotwater circulation cord or an electrical heatcabel on the hotwater pipe. Alternatively a heater (for example OSO NANO) can be mounted by the drainage point. Contact authorized installer.
The “hammering” comes from a sudden pressure increase when the tap closes quickly and is completely normal.
Solution: Mount an expansion vessel if the problem persists. Contact authorized installer.
Over 85 years OSO Hotwater has earned the trust from suppliers, co-workers and customers. We are still going to earn, and manage, this trust in an exceptionally good way, and value the opinion of our partners.
Our guiding targets:
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