Page 4
LAARS Heating Systems
DIP SWITCH CHART
1
2
3
4
5
6
7
8
ON
Switch 1
System Output
Switch 5
Rotation
Switches 6 and 7
Input Type
5
First On/Last Off
Lead stage rotates
every 24 hours
5
First On/First Off
First stage on is
the first stage
turned off
Temperature
6
7
External Set Point
Available for temperature
systems only, 4-20mA
signal changes Set Point
6
7
ON
ON
ON
ON
Switch 8
Set Point or Reset
8
Set Point
Set Point control
for temperature
8
Outdoor Reset
Hydronic heating
control with
outdoor reset
ON
ON
1
System Pump
SYSTEM relay is on
based on outside
temp, Shutdown,
and DHW priority
1
Combustion Air
Damper/Prove
SYSTEM relay is
on when any
OUTPUT is on
ON
ON
Switches 2, 3, and 4
Stage Type
2Stage Lo/Lo/Hi/Hi
On load increase
sequence on Lo
stages first, then Hi
stages
2
On/Off Stages
Each stage is
either on or off
2 Stage Lo/Hi
On load increase
sequence Lo to Hi
then next Lo to Hi
3
4
2
3
4
2
3 Stages
On load increase
sequence Lo, Mid,
Hi
3
4
2
3
4
4 Stages
On load increase
sequence Lo,
LoMid, HiMid, Hi
2
3
4
ON
ON
ON
ON
ON
ON
