tekmar 268 Boiler Control - Manual (Page 23)

23 of 32 © 2010 D 268 - 11/10
Rotate / Off
The Rotate / Off DIP switch selects whether or not the control is to
provide Equal Run Time Rotation of the boiler stages. If the switch is
set to Rotate, the stages will be rotated accordingly. If the switch is set
to Off, the firing sequence is fixed starting with the lowest stage to the
highest stage.
Fixed Last / Off
The Fixed Last / Off DIP switch selects whether or not the last boiler is
to be included in the rotation sequence. If the DIP switch is set to Fixed
Last, the last boiler is always the last to fire. This DIP switch is only
active when the Rotate / Off DIP switch is set to Rotate.
Fixed Lead / Off
The Fixed Lead / Off DIP switch selects whether or not the first boiler is
to be included in the rotation sequence. If the DIP switch is set to Fixed
Lead, the first boiler is always the first to fire. This DIP switch is only
active when the Rotate / Off DIP switch is set to Rotate.
First On / Last Off or First On / First Off
The First On / Last Off or First On / First Off DIP switch selects whether
the first boiler is the first to stage on and the last to stage off or the
first to stage on and the first to stage off. This DIP switch is only active
when the Rotate / Off DIP switch is set to Rotate and the Fixed Lead /
Off DIP switch is set to Fixed Lead.
Off / Exercise
The Off / Exercise DIP switch selects whether or not the control is to
exercise the primary pump and boiler pumps. If the DIP switch is set
to Exercise, the pumps are operated for 10 seconds after every three
days of inactivity.