User Guide

For the Installer
Symptom
Little or no water flows -
neon light off.
The water pressure is very low.
The filter is blocked or there is dirt in
the unit.
Use a pump to boost the supply
from a storage tank.
Disconnect the unit and flush it
through. Clean the filter as described
on page 9.
Cold water only
- neon light off.
The main water supply is connected
to the OUTLET of the unit.
The water pressure is too low.
The thermal cut-out has triggered.
The flow switch is not working.
Reconnect the main supply to the
INLET (marked in blue).
Use a pump to boost the supply
from a storage tank.
Reset it by opening the unit and
pushing the button on the cut-out
(diagram 10.) Before you do this you must
remove the cause of the problem.
Contact Redring.
Water too cold
- neon light on.
The power select screw set to ‘LO’.
(neon dim).
One element is not working
(neon dim).
The Power Supply Voltage has
dropped.
The flow switch is not set correctly.
Change the power select screw to ‘HI’
(see page 7).
Switch off the electricity supply & check the
resistance of the elements.You should
get the following readings:
The Heater should draw the following
currents;
40 amps for the 9.5kW model
45 amps for the 10.8kW model
50 amps for the 12 kW model
Change the brass jet for one with a
smaller hole.
Water flow too low, or
temperature too high.
The service valve is fitted to the
OUTLET.
There are constrictions in
the plumbing.
Fit the service valve to the INLET of the unit.
Check the plumbing. Only use PTFE tape
for making pipe joints.
Water goes from
hot to cold.
The service valve is fitted to the
OUTLET.
Fit the service valve valve to the
INLET of the unit.
Cause What to do
Loading kW Resistance Ω
9.5
10.8
12
12
10.6
9.6