NuVision Energy Saver Training manual

FAULT FINDING
If your central heating system does not switch on then check the
following:
1. The time clock is in the ON position.
If the time clock is within the normal ON period then check
that the selector switch is in the timed position.
2. The room thermostat (if fitted) is turned UP.
Turn the room thermostat (if fitted) to it’s maximum setting
and listen for the ‘click’ to indicate that it is now on.
3. The mains supply is ON.
Check that the indicator lights on the Energy Saver are
ON. If not a fuse may have blown.
If checks 1 to 3 prove satisfactory then switch the BYPASS switch
on the Energy Saver to the BYPASS position. If the boiler
operates then leave the switch in this position and contact your
installer. If the boiler still refuses to operate then there is probably
a fault with it, once again contact your installer.
________________________
Domestic Boiler
Energy Saver
Commissioning
Instructions
NuVision Energy
Queensgate House
48 Queen Street
Exeter
Devon EX4 3SR
www.nuvisionenergy.co.uk 01392247880
Modern boilers can benefit from the installation of a Boiler Energy
Saver. However the set up to achieve the maximum saving is more
crucial than standard system boilers.
The flow temperature setting on the Boiler Energy Sensor should
ideally be set at 1°C below the set temperature of the boiler
thermostat.
Setting the boiler temperature just above the Boiler Energy Saver
temperature is very important as this ensures that the Energy Saver is
in control of the boiler firing pattern.
Modulating and twin sensor controlled boilers

ENERGY SAVER COMMISSIONING INSTRUCTIONS
There are three user controls on the Energy Saver, these being:
1) Temperature Button (top)
2) Boost Button (middle)
3) Active / Bypass Switch (lower right)
For maximum economy the temperature program should be set so
as not to exceed the actual maximum temperature as achieved
when the boiler thermostat is set to it’s normal setting. To do this
proceed as follows:
1) With the Bypass Switch in the ‘bypass’ position allow the
boiler to cycle twice on the boiler thermostat’s normal
setting. The heating system must be up to normal running
temperature.
2) Press and hold the ‘Boost’ button until the display changes,
showing the flow ‘F’ and return ‘R’ temperatures (the boost
light will be on during this procedure). Make a note of the
flow temperature ‘F’.
3) The ‘Temperature Set’ button should now be held until the
temperature setting as shown on the display (1 to 7) is as
close to, but below the noted flow temperature.
E.G. If the noted ‘F’ value was 70’C then set the
temperature on the Energy Saver to program 5 –
67’C.
Note: If a different boiler thermostat setting is selected for
Winter/Spring, repeat the above procedure for the new
setting.
VIEW TEMPS
F 57 R 20 E 00
4) When the ‘Temperature Set’ button is released the display,
after a few seconds, will show the ‘Set Min Retn’ screen.
Again use the ‘Temperature Set’ button to set the minimum
return temperature as per boiler specification, e.g. gas set
to 40 – 50 ‘C, oil set to 50 – 55’C.
Note: If the minimum return temperature is already set above the
value required simply hold in the ‘Temperature Set’ button
until the temperature reaches 65’C at which point it will loop
back round to 32’C and you can then increase it to the
desired level.
5) Return the Active/Bypass switch to the ‘Active’ position.
Commissioning is now complete.
If it is found that the Energy Saver settings cause a noticeable
drop in hot water or room temperature then set the boiler
thermostat to the next available higher position and adjust the
Energy Minder temperature setting to the next higher value (as per
step 3).
WHAT THE INDICATORS MEAN
The Energy Saver has a digital display which can indicate the
following modes of operation:
FIRING – When displayed the boiler will be on and producing heat.
ECONOMISING – When displayed the boiler should be off, the
Energy Saver will be in economy mode. If the boiler is on then
check that the bypass switch is in the correct ACTIVE position.
BOOST – This will be displayed at first switch-on and will go off as
the system warms up. On certain types of heating system (gravity
hot water) the indicator will stay on during hot water only periods.
TEMP SET – This indicates that the heating system has reached
the required temperature as set in the Energy Saver.