Submittal

LAARS S8
®
Date:
Project #:
Engineer:
Prepared By:
Bid Date:
Project Name:
Location:
Contractor:
Standard
Equipment
• Multiple boiler control, for up to
eight boiler stages
• Ready to use with up to two
S8EXT extension modules for
control of up to twenty-four
boiler stages
• Outdoor reset or setpoint control
• Ready to use with XSIG module
to accept external 4-20mA
control signal
• System water temperature
sensor
Features
• System water temperature sensor
well
• Outdoor air temperature sensor
• Outdoor air temperature sensor clip
•
Graphics that display in plain
English
• Brightly lit LCD, visible with no
ambient light
•
Can be used with on/off, two-
stage and four-stage units
• Each boiler can be set individu-
ally to be automatically operat-
ed, fully on, manually adjusted,
off or standby.
• Communicates with EMS
(energy management systems)
by adding the XSIG 4-20mA
interface module
•
 Canbeconguredforindirect
domestic hot water pump control
with the additional the DHW
sensor, or by using a dry contact
closure, for a variety of domestic
water priority and control options
•
 Settingsarepre-congured,but
adjustable
• Three rotation options – timed,
manualorrst-on/rst-off
•
Minimum boiler return feature
with optional return sensor
•
Adjustable day and night sched-
ule
•
PID Lo/Hi/Lo/Hi or Lo/Lo/Hi/Hi
sequencing or over-sized-sys-
tem sequencing with features
such as last stage hold, reaction
time or minimum run time, to
minimize short-cycling
•
System output relay for system
pump with adjustable run-on
delay, or combustion air damper
with prove for air damper
•
Adjustable outdoor temperature
cutoff and customizable reset
curves
•
Internal programming switch pro-
tected by locking cover for security
against unexpected changes to
program
•
UL Listed, tested per standard 916
•
Boost feature
• Summer shutdown option with
domestic water override
•
Memory and backup with lithium
battery to store information for 100
days
Control for
Multiple Stage
-Fired Boilers
CA004000
Submittal Data