LAARS LLS-1 - Instruction Manual - Manual (Page 7)

Laars Logic System Page 7
Mighty Therm Boilers, models HH and PH, 175
and 250, require that vent dampers be installed. The
vent damper relay (supplied with the controller) is
plugged into this connection, but no other
connections are made to the relay. The function of
the relay is to close connections internal to the
control board.
ID Tag Port - J2
ID tag must NEVER be removed. Do not
tamper with this connection at any time.
To LCD Panel - J4
An additional LCD (controller display) can be
connected here and remote mounted up to 500 feet
away from the LLS. This is for display only. Changes
cannot be made, and the control cannot be reset from
the remote display.
SECTION 4.
Factory Installed Connections
The following connections are made at the
factory, if required, and descriptions are provided
here for informational purposes only. Some
connection points are not functional on the LLS-1,
and will not be used. Contact the factory before
modifying any of these connections. The LLS-1 has
several operating parameters that can be changed to
ensure that the boiler operation best meets the needs
for your application. See Section 5 and 6 for specifics
about programming options.
Inlet Temp Sensor - J7
This connection is made at the factory for the
temperature sensor on the boiler/heater inlet.
Outlet Temp Sensor - J8
This is the factory connection for the
temperature sensor on the boiler/heater outlet.
Water Level Sensor - J9
This connection is made at the factory on units
that are ordered with the Low Water Cutoff option,
or other options that include a Low Water Cutoff.
Water Flow Sensor - J10
This connection is made at the factory, for the
water flow sensor (flow switch).
Tran Sec - J6
This is the factory connection for the unit’s
transformer.
Gas V-5 H-Volt - J22
Not used on LLS-1
Gas V-6 H-Volt - J21
Not used on LLS-1
Valve Gas 2 - J18
This connection is made at the factory to
control safety gas valve or stage.
Valve Gas 1 - J17
This connection is made at the factory to
control safety gas valve or stage.
Blocked Vent Sw - J13
This is the factory connection for a unit that is
equipped with a blocked vent switch.
Venturi Sw - J16
This is the factory connection for a unit that is
equipped with a venturi pressure switch.
Roll Out Sw - J14
This connection is made at the factory on units
that are equipped with roll-out switches.
Fuse Link - J15
This is the factory connection for a unit that is
built with a fusible link.
Gas Valve 3 Relay - J26
Not used on LLS-1
Gas Valve 4 Relay - J25
Not used on LLS-1
Gas Valve 5 Relay - J24
Not used on LLS-1
Gas Valve 6 Relay - J23
Not used on LLS-1
ID Tag Port - J2
ID tag must NEVER be removed. Do not
tamper with this connection at any time.
To LCD + Keyboard - J3
This connection is made at the factory, for the
LLS display and keypad. Additional remote LCD
panel must be connected to J4.
SECTION 5.
Programmable Parameters
See Section 6 For Programming
Instructions
The LLS-1 has several operating parameters
that can be changed to ensure that the boiler
operation best meets the needs for your application.
The following is a list of the programmable
parameters, minimum and maximum values, and
defaults. NOTE: Laars controls boiler water
temperature at inlet.
OUT OF
PRODUCTION