#042793 Manual

6
Version 1.1
Operating Instructions and first operation test
Note to installer: You must test the operation of this appliance after installation.
1. Pressurize the water system by turning on pump or city water pressure.
2. Purge all air from system by turning on the taps until a steady stream of water flows from the
taps. Turn off taps.
3. Turn on the 12 VDC power supply. A testing sequence on the remote starts and after a few
seconds, the display shows the last selected temperature. The production preset water
temperature of the water heater is 45° C.
The selected water temperature is stored in nonvolatile memory. Even after disconnecting the
electric power, the former selected temperature will be displayed. This is a very useful feature
as you don’t have to select your desired temperature again in case of a power loss.
For colder (blue button) or warmer water (red button) press the buttons till you reach the desired
temperature.
4. Turn on the gas supply at the tank and the manual gas valve if installed in system. Heater will
remain dormant (and will not use any gas) until a water tap is opened and the heater senses a
water flow of at least 1.5 l/min.
5. Turn on the hot water tap (water flows and/or pump starts). The heater will fire up within two seconds
and hot water will start to flow from the tap in the time that it takes to get through the plumbing from the
heater to the tap. Hot water delivery will continue as long as the water is flowing. Depending on the
length of the hot water line, it might take up to 20 seconds until the hot water comes out of the tap.
After the first installation or when you change the gas bottle, it might need 3-5 trials, until the gas has
reached the burner and you have ignition. On the display failure E1 is shown, which means no flame
detection. When E1 appears, just turn the water tap on and off to trigger a new ignition sequence.
After the burner ignites you will see the current temperature on the display. Depending on the water
flow and the ambient temperature of the cold water, it will take some seconds, until the control
reaches the desired water temperature. If the water temperature does not reach the desired
temperature, the water flow may be too high, or you have extremely cold incoming water.
Reducing the water flow will allow the outgoing water to reach to the desired temperature.