Potterton Envoy Flowsure, Installation & Service Instructions Manual

Page: 20 / 39

Boiler Display & Controls
Publication No. 559779
20
Boiler Display & Controls – Page 20
Note: If you hold the Lockout Reset/Function Button for
more than 5 seconds you will enter the installer
adjustment mode settings. If this happens, leave the
controls alone and they will reset after a few minutes.
Further information on installer adjustment is provided
below.
Pump Overrun: This is displayed on completion of a
heating period when the residual heat from the boiler is
being dissipated.
Hot Water: This is displayed when the storage tank
water is being heated.
Reset Button
Pressing the reset button will allow the control to be
reset and the boiler restarted should a lockout condition
have occurred. (The character is shown on the
status/function display and a number i.e. shown on
the temperature/settings display)
To Shut Off
Set both the CH & DHW switches to 'Off'.
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Installer Adjustment
The following functions allow you (the installer) to
configure the boiler to a particular site or to gain
information about the boiler and system including the
most recent faults that may have occurred. In most
cases the default settings will have been used to ensure
the most efficient operation and should not be changed
unless necessary. To enter the adjustment mode
proceed as follows:-
From Stand-by: Press the Lockout Reset/Function
Button twice and the display will change to a flashing.
From Central Heating: Press the Lockout
Reset/Function Button once and the flashing will
change to a flashing .
To enter the installer settings mode depress the
Lockout/Reset function button and hold down for around
5 seconds. The Status/Function display will change to
Important:
If a setting is changed when in this mode the Lockout
Reset/Function Button must be pressed through the
following sequence to store the change in memory.
Settings: Press the reset button after each selection to move
to the next function.
Storage Tank: The 50 litre is set at 50 and the 20 litre
tank is set at 20. The 20 litre may also use 00 in areas
where water hardness is a problem. Whilst in this mode
press the + or - buttons to select appropriate tank size as
indicated in the Flow Temperature & settings Display.
Minimum Flow Temp: See Outdoor Weather
Compensator.
Reference Temp: See Outdoor Weather Compensator -
if fitted.
Used only to change from the default setting of :
This allows the Setback Function to operate and means
that the boiler will run at times when the secondary
controls are satisfied due to the Outdoor Weather
Compensator controlling the boiler.
Return Water Temp: Actual reading (°C) shown in Flow
Temperature & Settings Display.
Pump Overrun: Settings available are 1, 5, 10, 15, 20,
25, 30, 35, 40, minutes and (continuous). Whilst in
this mode press the + or - buttons to select appropriate
timings as indicated in the Flow Temperature & settings
Display.
Flame Signal: When this is shown, the flame signal will
be shown as a percentage between & in the
Temperature & Settings Display.
Last Lockout: This is when a lockout has occurred and
the control has been reset. For more information see the
Fault Finding section.
Last Blocking Error: This is when a blocking error has
occurred and then cleared. For more information see the
Fault Finding section.
Maximum Fan Speed: This is normally set at 99 which
is equivalent to 4680 RPM. For more information see the
Fault Finding section.
Minimum Fan Speed: This is normally set at 40 which is
equivalent to 2920 RPM. For more information see the
Fault Finding section.
Fan Speed Offset: This allows for an offset in the fan
speed. For more information see the Fault Finding
section.
Control Status: From the information shown on the Flow
Temperature & Settings Display it is possible to
determine the function the control is performing at any
one time.
For more information see the Fault Finding
section.
Display returns to User Mode at this point.