9
CONTROL ADJUSTMENTS
The ACT5 Maintenance Checker
plugs into the Main CPU Board, shown in
Fig. 8, and is used in many functions,
including choosing the leaving chilled/hot
water temperature set points.
This board also has the Mode Setting
Switch. This switch must be positioned
to the left whenever the unit is to be in
normal operating condition. Position this
switch to the right when adjusting the
burner. Position this switch to the middle
when the unit is to sit dormant and
unresponsive, but with power applied to
it.
The Unit Number Setting Dip Switch is
only used in conjunction with the optional
AroTrend Remote Monitoring or an
optional LON Adapter. If not being
monitored, this dial switch must be set to
“0” or “F”.
Fig. 8
– Main CPU Board
