Application Note
J99x Series Pilots
Issue Date
September 14,
2017
J99x Series BASO® Replacement Pilot Burners
© 2017 BASO Gas Products
1
Part No. BASO-INS-J99xREPLACEMENT, Rev. B
www.baso.com
J99x Series BASO® Replacement Pilot Burners
Introduction
This application note aids the appliance engineer or
authorized service contractor in locating and testing
a pilot burner in a standing pilot application. J99x
Series replacement pilot burners are manufactured
with a variety of tips and mounting configurations.
Representative types of mounting with standard
pilots are illustrated in Figure 1. Dimensions are
approximate and may vary, provided the
requirements of good ignition are met.
Note:
When a pilot is to be installed on an
appliance already in the field, obtain the appliance
manufacturer’s recommendations for the correct pilot
specification and location dimensions for the
particular model.
Location Considerations
Consider the following when locating the pilot burner:
Locate the pilot burner so that it can be reached
easily for lighting.
Locate the pilot burner in a position that has a fixed
relation to the main burner (see Figure 1).
Locate the pilot burner in a position that receives
incoming air and not products of combustion from
the main burner. Locate the pilot burner where it will
not be affected by an excessive draft of incoming air.
Locate the pilot burner in such a position that it does
not receive the full force of igniting or extinguishing
puffs from the main burner.
Locate the pilot burner in a position that allows
removal for cleaning.
J999MKA-2*
J999MYA-2*
J999MHA-2*
J991MDA-2**, J993MDA-2**
J995MDA-2**, J997MDA-2**
J992MDA-2**
J996MDA-2**
J994MDA-2**
J998MDA-2**
J990MDA-2**
J999MDA-2**
45
o
* Mount pilot ignition port 3/8 in. (9.53 mm) above and 1/4 in. (6.35 mm) away from the center of nearest burner port.
** Mount pilot ignition port 1/4 in. (6.35 mm) above and 1/4 in. (6.35 mm) away from the center of nearest burner port.
Figure 1: Possible Mounting Positions
Note: All replacement pilot burners come with a natural gas inlet fitting (Y90AA-32xx, -62xx, or -72xx)
pre-assembled in the pilot burner. A LP gas inlet fitting (Y90AA-42xx) is included and may be used if required.
Please contact the manufacturer of the appliance prior to making any changes to the original installation.
