Munchkin 399M manual Munchkin Burnertech GAS Valve, Combustion Settings

GAS CONNECTION

removing the cap and installing the manometer. The gas pressure must remain between 7" and 14" during stand-by (static) mode and while in operating (dynamic) mode. If an in-line regulator is used, it must be a minimum of 10 feet from the Munchkin. It is very important that the gas line is prop- erly purged by the gas supplier or utility. Failure to properly purge the lines or improper line siz- ing, will result in ignition failure. This problem is especially noticeable in NEW LP installations and also in empty tank situations. This can also occur when a utility company shuts off service to an area to provide maintenance to their lines. This gas valve must not be replaced with a conventional gas valve under any circumstances. As an additional safety feature, this gas valve has a flanged con- nection to the Venturi and blower.

MUNCHKIN BURNERTECH GAS VALVE

110 VOLT AC ELECTRICAL CONNECTION

INLET PRESSURE TAP

(NOTE: INLET GAS PRESSURE CAN BE MEASURED TO ASSURE PROPER GAS SUPPLY)

VENTURI

OUTLET PRESSURE TAP

(NOTE: A NEGATIVE READING WILL BE MEASURED WHILE THE FAN IS

IN OPERATION)

THROTTLE ADJUSTER
(NOTE: IF FOR ANY REASON THE THROTTLE
NEEDS TO BE ADJUSTED,
IT IS VERY IMPORTANT THAT A " COMBUSTION
ANALYZER " BE USED TO ENSURE SAFE AND PROPER OPERATION
TURN THE ADJUSTER TO THE (+) TO INCREASE GAS
OR TO THE (-) TO DECREASE THE GAS SUPPLY.
THIS ADJUSTMENT COULD AFFECT THE CO/CO % LEVELS. 2
MAKE SURE THE LEVELS CORRESPOND TO THE CHART IN	Fig. 3-1
FIG. 3-2 COMBUSTION SETTINGS)

WARNING

Failure to follow all precautions could result in fire, explosion or death!

COMBUSTION SETTINGS

HIGH FIRING RATES and LOW FIRING RATES ON ALL MODELS

		Natural Gas		Propane LP
		low	high	low	high
	Carbon CO ppm	0–20 ppm	70 ppm–135 ppm	0–20 ppm	80–150 ppm
	Monoxide
	Carbon CO 2%	8-1/2% – 9-1/2%	8-1/2% – 9-1/2%	9-1/2% – 10-1/2%	9-1/2% – 10-1/2%
	Dioxide
Fig. 3-2

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