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iNSTALLATiON
Commissioning
The temperature controller is fitted with a safety cut-off switch
that responds at 85 °C ± 3 °C.
f If the safety cut-off switch responds, check what caused it to
be triggered and, once the problem has been rectified, press
the RESET button.
f Make sure the cover of the control panel is correctly posi-
tioned and the locking screw has been fitted.
The temperature controller offers a wide choice of configurations,
to provide maximum flexibility with the ESH Sole 109 mixing valve.
Wiring up threaded immersion heaters and temperature
controllers
Note
The entire electrical wiring must be carried out by a qual-
ified contractor and must comply with the latest edition
of the IET (formerly IEE).
Note
- Always use a suitable heat-resistant flexible cable
with a temperature resistance of at least 90 °C, e.g.
H05V2V2-F (309-Y).
- Size the conductors in accordance with the IET Wir-
ing Regulations.
- For threaded immersion heaters we recommend
≥ 2.5 mm², due to the high ambient temperatures of
up to 90 °C.
- The entire internal wiring is fitted at the factory.
f Follow the instructions and connect the electric cable (volt-
age), the neutral conductor and the earth as specified.
Specific features of the earth cable connection (E):
10. Commissioning
10.1 Checks before commissioning
f Check all connections for leaks.
10.2 Initial start-up
Material losses
Fill the appliance with water prior to switching on the
mains power supply.
f Open the DHW tap that is furthest away from the appliance.
f Open the cold water supply valve to fill the appliance.
f Once the water is flowing evenly out of the cold water supply
valve, leave it to run for a few minutes to flush out any dirt,
swarf or residues. Then close the cold water supply valve.
f Consecutively open the hot water taps to remove any remain-
ing air.
f Check all water connection for leaks and rectify if required.
f Manually operate the expansion valve to ensure free water
flow through the discharge pipe. To do this, turn the knob
anti-clockwise. To close the expansion valve, continue turn-
ing it anti-clockwise until the expansion valve closes.
f Manually operate the temperature and pressure limiter to
check that water can flow through the discharge pipe. To do
this, turn the knob anti-clockwise.
www.stiebel-eltron.co.uk
f Switch the mains power supply ON.
f Refit the cylinder cover. This is important as the cover pre-
vents heat loss from the DHW cylinder and combination
valve, thereby conserving energy.
Note
Do not place heavy objects on the cover.
10.3 Recommissioning
See chapter "Initial start-up".
11. Shutdown
WARNING Burns
If the thermal controller has failed, very hot water will
flow out.
f Disconnect the appliance from the mains power supply at the
MCB/fuse in the distribution board.
f Drain the appliance. See chapter "Maintenance / Draining the
appliance".
Fault
Cause
No water is supplied at
The water supply is off.
the hot water taps.
Dirt trap is blocked.
Water flowing from the
Threaded immersion
taps is cold.
heater is not switched on.
Safety cut-off switch of
DHW cylinder has re-
sponded.
Safety cut-off switch
of threaded immersion
heater has responded.
Water is discharged in-
Expansion vessel is not
termittently.
fully filled.
Water is discharged con-
Thermal controller has
tinuously.
failed.
Expansion valve is de-
fective.
Pressure reducing valve
of cold water inlet not
working.
Temperature and pres-
sure limiter is defective.
If you cannot remedy the fault, contact your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate (000000-0000-000000).
remedy
Open the appliance shut-
off valve.
Turn off water supply.
Remove the strainer and
clean it.
Switch on threaded im-
mersion heater.
Press the RESET button.
Press the RESET button.
Follow the instructions in
chapter "Maintenance /
Intermittent or slow
water discharge from
tundish".
Isolate threaded im-
mersion heater(s) from
power supply. If water
discharge ceases, check
thermal controller. Re-
place thermal controller
if it is faulty.
Replace expansion valve.
Check pressure of pres-
sure reducing valve. If
pressure is greater than
0.3 MPa, replace the
pressure reducing valve.
Drain 10 litres from DHW
cylinder and replace tem-
perature and pressure
limiter.
ESH Trend GB |
11
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Table of Contents
Troubleshooting
