Intellihot iN199, Installation & Operation Manual

Page: 36 / 78

iN199 Adjusting CO2 Level 32
November 2021 - Revision 00
NOTICE
Do NOT change the blower speed settings. This adjustment
MUST be completed by factory personnel ONLY. Changing
this setting VOIDS the warranty!
6. Create a hot water flow of at least 6.0 GPM as shown on
the display screen.
Note: If flow rate is inadequate, a pop-up message notifies
you to increase the flow.
7. At a flow rate of 6.0 GPM, the heat engine starts.
8. Press HIGH FIRE on the display screen.
9. Allow three minutes of operation at High Fire.
10. Record “initial output” in Hire Fire Recorded Values table.
11. If the CO
2
values are within appropriate range, proceed to
Step 12, otherwise continue.
a. Use a flat-blade screwdriver to turn the High Fire
screw clockwise to decrease and counterclockwise to
increase the CO
2
value.
b. Adjust in ¼ turn increments.
c. Wait three minutes to stabilize flue gas readings and
recheck values.
d. Adjust until values fall with specified range.
HIGH
FIRE
SCREW
12. After the desired values are achieved, record the new
High Fire CO
2
“adjusted values” in the table.
CO
2
and CO Standards
Description CO
2
Range Max. CO Level
Natural Gas High Fire 9.1% to 9.3% < 200 ppm
Propane High Fire 10.1% to 10.5% < 200 ppm
High Fire Recorded Values
Date ____ / ____ / _______
Heat Engine Initial Output Adjusted Value
CO
2
Value %
Max CO ppm
6