Digistat Installer Options - Worcester 24CDi Instruction Manual

Installer Options
If you wish to change any of the Installer Options as
shown below, enter the Installer Option Menu from
Auto mode by pressing < and + simultaneously for 5
seconds.
Pressing < and + again for 5 seconds will exit the
Menu and return to Auto mode.
Once the Installer Options screen has been selected,
the < and > buttons allow you to scroll through the
Menu (shown below). The + and - allow you to
change values. Once a value has been changed
pressing > before exiting the Menu will save the new
setting. (The figure below shows Option 02 OFF).
Installer Function
Options
02 Freeze protection
04 Low Set Point C
05 High Set Point C
06 Delayed Start (Energy
saving feature
10 System protection
11 System protection
time (Mins)
Option 02 - Freeze Protection
Freeze protection will switch on the heating if the
room temperature falls to 5°C and will then control
the temperature at 7°C even if the Digistat is in OFF
mode.
The Freeze Protection default in ON.
To switch off the Freeze Protection mode enter the
Installer Options Menu (Refer to Installer Options 02)
and change to OFF. Press > to accept.
Option 04 & 05 - Low and High Limit set points.
The user temperature set points defaults are High
32°C and Low 5°C, to change these limits enter the
Installer Options Menu
(Refer to Installer Options 04 & 05).
Select
Option
On Off
5 High
Limit
Low 32
Limit
On Off
On Off
1 5
DIGISTAT PROGRAMMABLE 24 HOUR
ROOM THERMOSTAT SYSTEM
8 716 114 518a (09.07)
Option 06 - Intelligent Delayed Start
The Intelligent Delayed Start is an energy saving
feature which automatically reduces the warm up
time for the heating system.
If enabled, the start time should be set an hour earli-
er than the time you want the property to reach the
set temperature.
Intelligent Start will delay that start time, by an
amount that it has calculated based on the actual
and set temperature.
As the weather becomes milder, the start time is
delayed, so that fuel is not wasted bringing the room
up to temperature earlier than necessary.
The Digistat calculates approximately 10 minutes to
raise the temperature by 1°C, up to a maximum of
6°C.
Note:
Intelligent Delayed Start only applies in Auto mode.
Intelligent Delayed Start default is in OFF mode.
To switch ON Intelligent Delayed Start enter the
Installer Options Menu (see Installer Options 06).
Default
Note:
The Intelligent Delayed start option is not suitable
for underfloor application.
On
Ensure Installer option 06 is set to OFF before final
commissioning for underfloor application.
5
Special Note:
32
If the Intelligent delayed start feature is
enabled, (Off changed to On in Installer option
06), please inform the end user of this feature.
Off
The following special note has been added to
the user instruction to explain the adjustment
Off
requirement:
When the delay period is operating indicated by the
3
flame symbol flashing, pressing any button returns
the Digistat to auto mode allowing normal button
operation until the next time/ temperature event,
when it will resume the delay start mode or follows
the Holiday, Manual, Override or Off modes as
selected.
Changes to the installer options and pre-set pro-
grammes must be made with the flame symbol not
flashing.
OPERATING & INSTALLATION
INSTRUCTIONS
DIGISTAT
INSTALLER OPTIONS
(Energy saving feature).
13