SYX66x Commissioning Guide
V1.10.3 300117
Page 36 of 61
10.
Heating Menu Pages
10.1
Switch Page
Temperature Control
– Space Frost – This will indicate the presence of a space frost condition. The controller as
detected a low space temperature and will have initiated the heating system. This will clear when the space sensor
has increased by 2’C above the Space Frost Set Point.
Boosting
– This will indicate the heating is in boost mode. An indication that the system is on and is raising the room
temperature ready for occupation
Space Hi-Limit
– This will indicate is the heating has been disabled due to the Room High Limit being exceeded by
the room temperature. The room high limit set point is adjusted using the Room High Limit Offset value as this is added
to the standard Space Setpoint.
Control
– This shows the current status of the heating system, its Historical changes can also be viewed to check on
when plant started and stopped. This display shows several conditions with status values as follows:
0 - Off
– The controller is not required. Frost protection is active
1 - Opt Off
– The controller has turned the heating off early due to the space temperature being above the day set
point and the calculated cool down rate of the building means that the space set point can be maintained until
occupation ends. If the space temp falls at a faster rate the heating will be re-started if required.
2 - Night
– The controller is outside the occupancy period and watching for frost conditions
3 - Frost
– This indicates the low space temperature has been detected
4 - Opt On
– This indicates that the controller is in its boost mode and is trying to heat the building to the target day
set point ready for the occupancy time programmed.
5 - Early
– This indicates that the heating was started too early and that the controller is learning a new run up
characteristic.
6 - Day
– The controller is inside the occupancy period
7 - Setback Mode
– The controller is outside the occupation period but running in a reduced flow temperature mode.
8 - Flow Eco
– The controller has been asked to provide a very low flow setpoint that is very close to the current room
temperature. The heating need not run.
9 - Outside Eco
– The outside high limit has been reached and the heating has been switched off. The heating will
come back on again if the outside temperature falls 1’C below this limit.
