Technical data

Troubleshooting
9
Remedy
- Fix the water pressure problems; remove any flow restrictors in outlets.
- Switch the electric power supply off, check that there is no power on any of the terminals.
- Seek electrical assistance to check power all the way to the elements.
Problem 2
- The water that is coming out of the Hotrun is not warm enough.
Cause
- The incoming water is very cold (below 12°C)
- The total flow is too high.
Remedy
- A flow restrictor should have been installed. If so, an additional ball valve in the water
supply to the Hotrun can enable you to reduce the flow and so increase the temperature
(not for Hotrun-T models).
Problem 3
- The heating of water stops when trying to set the required temperature to a colder setting.
Cause
- Aerator/restrictor in nozzle of outlet causing too much back pressure.
- Incorrectly balanced flow restrictor in the supply line.
- Flow from the cold supply line is less than the requirements for the Hotrun.
Remedy
- Remove the restrictors in the tap or aerator fitting. Fit the appropriate restrictor to the cold
supply line for the Hotrun. Check that other taps or restrictors inbuilt into the supply line are
not effecting the flow or reducing the pressure too much.
Problem 4
- A Hotrun fitted in an upper floor situation of a building that is gravity fed, the Hotrun doesn’t switch on.
Cause
- The pressure is less than 100kPa. The pressure of water under gravity is 9kPa per metre, this
equates to approximately 30kPa per floor plus the height of the roof tank. On request we can
help to accommodate for most situations, sometimes just leaving out the flow restrictor from
the cold water inlet can be sufficient.
Remedy
- Remove all restrictors in the tap or aerator and use ‘star’ inserts in spout instead of aerator.
Allowing full flow will often help in low pressure situations.
If the tests above indicate a fault then contact Elwa Technical Support