Elwa HOTRUN 35 Operating And Fitting Instructions Manual page 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
Troubleshooting
9