Installation manual

68
Option 11 - Start-up method
Your thermostat can start up the
system in three different ways.
Press + until Option 11 is
displayed, use ‡ & ˆ to select
required setting.
Setting 0 Normal: Heating is turned up or down at the
programmed times.
Setting 1 Optimum start control (OSC) (or Comfort Set-
ting): This allows you to programme the time at
which you would like to be up to the required
temperature. The thermostat then calculates
how soon before the required time the heating
is turned up. This will vary with weather
conditions ranging from a maximum of 120
minutes to 0 minutes before the programmed
event time. This setting must be used together
with option 12 to match the optimiser setting
to the building in which it is installed.
Setting 2 Delay start (or Economy Setting): This is an
alternative to OSC. Set the event times in the
normal way taking into account the time that
the building takes to heat on an average day.
The thermostat monitors switch on time,
actual temperature and wanted temperature
and delays the start of the heating if the actual
temperature is close to the programmed tem-
perature.
Option 12 - Optimum start control pre-heat setting
(Option 11 set to 1)
Press + until Option 12 is displayed,
use ‡ & ˆ to select required
setting (only active if Option 11
is set to 1).
The optimum start control must be adjusted to match the
building energy characteristics. Use the ‡ & ˆ keys to
selected the required pre-heat period. The table below
suggests typical settings. If the building fails to reach
temperature on time, increase the setting by 15 minute steps
each day until the correct setting is found. If the building
reaches temperature ahead of time, decrease the setting by
15 minute steps each day until the correct setting is found.
00:15 15mins, warm air systems, well insulated building.
00:30 30mins, warm air systems, well insulated building.
00:45 45mins, warm air system poorly insulated building.
01:00 60 mins, radiator system, light weight well
insulated building. (Factory setting)
01:15 75 mins, radiator system, light weight medium
insulation.
01:30 90 mins, radiator system, medium weight poorly
insulation.
01:45 105 mins, radiator system, heavy weight building,
well insulated.
02:00 120 mins, radiator system, heavy weight building,
poorly insulated.
Option 13 - Optimum start control/Delayed start event
setting (Option 11 set to 1 or 2)
The Optimum start or delayed
start control can be applied to
event 1 only or to each event of
the day which requires a higher
temperature than the previous
event. Press + until Option 13 is
displayed, use ‡ & ˆ to select
required setting (only active if
Option 11 is set to 1 or 2).
Setting 0 Applies only to first event of day. (Factory
setting)
Setting 1 Applies to each event of the day that requires
a higher temperature compared to previous
event.
Programmable room stat