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IAQH-1000 Manual
11. Adjust and Verify Main Gas Regulator:
a. Turn the burner up to its maximum firing rate by changing HX Control
Loop to manual and power to 100%
b. Use a manometer to check the inlet pressure on the tee on the
upstream side of the pilot regulator, see See Figure GT1, Item 12
c. Confirm that the inlet pressure remains between the maximum and
minimum, for this machine: 7-10 inH20 (17-25 mBar) during the high fire
testing
d. Plug the upstream tee and or use another manometer to check the main
gas regulator outlet pressure on the downstream side of the
downstream solenoid valve, see See Figure GT1, Item 21, this is also
1/8” NPT
NOTE: Do not leave the machine in this mode unattended, the unit will
continue to heat until the high limit circuit is tripped, the commissioning
engineer must watch the system thermal values and ensure to not allow
the machine to run for extended periods in this setting.
e. Set the Main Gas regulator See Figure GT1, Item 10 to be 1 inH20 lower
than the upstream side. For example if the inlet is 10 inH20, set
downstream to 9 inWC.
12. Verify the Ratio Regulator Adjustment
a. Use a manometer to check the load pressure on the ratio regulator, see
See Figure GT1, Item 5
b. Adjust the burner power until the load line pressure is 2.0 inH20 or
5 mBar.
c. Check the manifold pressure near where the valve train attaches to the
burner, see See Figure GT1, Item 3
d. Verify that the manifold pressure is 0.8–0.9 inH20 or 2–2.2 mBar on
natural gas, and on propane set to 0.3-0.4 inH20 0.74-1 mBar on
propane
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Содержание IAQH Series
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Страница 50: ...IAQH 1000 Manual Gas Connection and Burner Setup FIgure GT1 50 ...
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