LAARS NeoTherm LC NTV1700 - Install and Operating Manual - Manual (Page 76)

LAARS Heating Systems Page 72
WARNING
Improper adjustment may lead to poor
combustion quality, increasing the amount of
carbon monoxide produced. Excess carbon
monoxide levels may lead to personal injury or
death.
Primary
burner
Primary
controller
Gas
valve
Gas
valve
Secondary
controller
Secondary
burner
Operator
interface
Boiler 1
Fig. 97 – Primary and Secondary Burners in a Boiler
Fig. 98 – High and Low Fire Adjustments on
Gas Valve - NT 1000
High fire adjustment
Low fire adjustment
Fig. 99 – High and Low Fire Adjustments on
Gas Valve - NT 1700
High fire adjustment
Low fire adjustment
Note – If you are setting up an NT 1700 unit for
high-altitude operation, you must change the “low
fire” RPM setting (“Minimum Modulation Rate”). See
the instructions in Section 9.7.