Element
Section 8: Water Heater and AquaSolve Startup:
L-OMM-0003_A
• 10/8/2021 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
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11. Once the desired
Low Fire
combustion levels are achieved, return to the touch screen and
increase the
HTR
MOD
firing rate to the maximum
High Fire
rate for the specific product.
NOTE
: The maximum factory-set
High
Fire
firing rate may not be 100%.
12. With the burner firing rate now stabilized at High Fire, turn the Gas Valve Orifice Adjustment
screw clockwise to decrease gas flow and decrease CO2, or counter-clockwise to increase
gas flow and increase CO2. For models LC5Q to LC8Q, loosen the set screw on the side of
the shutter valve body before attempting to adjust the shutter. Be sure to tighten the set screw
on the valve body when adjustments are complete.
13. Once desired combustion is reached at
High
Fire
, return to
Low
Fire
to confirm settings.
14. When all combustion adjustments are complete, go back to the
MANUAL
OVERRIDE
screen
and return the function back to the “
AUTO
” setting.
8.6.3 Check the Vent Pressure
Once the combustion is properly adjusted, use the test hole in the flue vent to measure vent
pressure. With the burner firing, confirm the vent pressure does not exceed 0
.5” W.C. Pressure in
excess of 0
.5” W.C. indicates a vent sizing issue that must be addressed before operating the
water heater.
W A R N I N G !
When adjustments are complete return the MAN OVR function back to “AUTO” before operating
unit to avoid risk of high water temperature that may result in property damage, scalding, other
serious injury or death
.
