VIII. START UP. Applied Air GAS-FIRED HEATERS

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VIII. START UP. Applied Air GAS-FIRED HEATERS | Manualzz

VIII.START-UP PROCEDURE

Adjust Air Flow Switch

Lock unit into high fire.

No

Is incoming gas pressure 7”?

Yes

Is high fire at least a 70° temp rise?

No

Yes

Lock unit into low fire.

Adjust incoming gas pressure.

Adjust high fire.

NOTE: The start up procedure should be followed in the order outlined at left. Failure to do so may result in unit not performing properly. Follow procedures to make adjustments.

These adjustments should be made after Ventilation System has been balanced.

To Adjust Air Flow Switch:

With heater in HEAT mode, slowly turn air flow switch adjustment until air flow light goes out on FSC. Then turn back one half turn.

Setting Incoming Pressure:

Pressure must be measured at first “T” in supply gas line before the first gas valve.

Adjusting High Fire:

Remove wire #4 from the Maxitrol amplifier. This will drive the valve into its full open position. Adjust high fire with the regulator inside the unit. Turn clockwise to increase.

Is low fire approximately a 10° F temp rise?

No

Yes

Start up complete

Adjust low fire.

Adjusting Low Fire:

Remove terminal #5 from the Maxitrol amplifier. This will drive the valve into its lowest position. Adjust the low fire by turning the low fire bypass on the side of the modulating valve for M511 and

M611 models. For MR212D, the low and high fire are both inside the valve. Refer to the included Maxitrol literature.

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