LAARS LLS-1 - Instruction Manual - Manual (Page 5)

Laars Logic System Page 5
Figure 1. Laars Logic System Connections.
DHW Tank Temp - T3
This connection is for a Laars DHW
(domestic hot water) Sensor only. (Standard tank
aquastats must be connected to T1, the Field Interlock
connection on the controller.) The Laars DHW sensor
is a thermistor, not a switch, and this connection reads
resistance. Use of this sensor allows the user to
program domestic water features that are not available
when using a standard tank aquastat.
WARNING
If DHW sensor is used, additional components that
are tied to the field interlock will NOT prevent the
unit from firing when the DHW sensor calls for heat.
For field-supplied safety switches that must keep the
boiler from firing, connect directly through the boiler
wiring or through the auxiliary switch connection on
the LLS (J32).
OUT OF
PRODUCTION