Intellihot iN401, Руководство по эксплуатации и установке

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iN401 - iN501 Adjusting CO2 Level 32
May 2019 - Revision 00
10. Adjusting CO
2
Level
10.1 General Information
This procedure is required:
1) only during installation in a high-altitude location over
8,000 feet, or
2) when converting the unit from natural gas to propane.
This procedure should be performed only by a qualified
technician.
DANGER
A concentration of carbon monoxide (CO) as small as
0.04% (400 parts per million) in the air can be fatal. When
making High Fire and/or Low Fire adjustments, CO levels
must be monitored using a flue gas analyzer and must not
exceed 400 ppm of CO at any time during the operation.
Adjusting the “Low Fire screw” or the “High Fire screw”
even in small increments can result in a significant
increase in CO concentration. To avoid serious injury or
death, DO NOT make any adjustments to the gas valve
without monitoring the exhaust gases with a functional
and calibrated flue gas analyzer.
CO
2
and CO Standards
Description CO
2
Range (%) Max. CO Level (ppm)
Natural Gas
High Fire 9.1% to 9.3% < 200 ppm
Low Fire 9.1% to 9.3% < 60 ppm
Propane
High Fire 10.1% to 10.5% < 200 ppm
Low Fire 10.1% to 10.5% < 60 ppm
NOTICE
The values listed in the table are for nominal conditions.
Variables such as gas pressure, heating value of the gas,
humidity, and temperature of combustion air can impact
CO and CO
2
values. Changes in these variables can result in
different CO and CO
2
values on the same water heater.
A qualified service technician must use a
calibrated flue gas analyzer to adjust the gas valve
to achieve the desired CO
2
and CO values.
Before any adjustments are made, the service
technician must confirm the static gas pressure
meets these minimum requirements.
Natural Gas - 8” W.C.
Propane - 11” W.C.
10.2 Adjustment Procedure
1. Open or remove the front doors.
2. Locate the gas valve on each heat engine. There are two
heat engines.
3. Remove the plug from the test port on the exhaust
manifold. Insert a calibrated flue gas analyzer into the test
port.
4. Follow the display screens.