3
®
INSTALLATION OF CONTROL, SCANNERS, AND FLAME DETECTORS
Wiring Base
Mount the control in an enclosure/burner panel that provides the proper protection for the control.
The location should be free from moisture, excessive vibration and within the specified ambient tem-
perature rating. The control may be mounted in any angular position.
All wiring should comply with applicable electrical codes, regulations, and local ordinances. Use
moisture resistant wire suitable for at least 90 degrees C. Circuit recommendations are found on
pages 10 through 11. Consult the factory for assistance with non-standard applications.
WARNING: Installer must be trained and qualified. Follow the burner manufacturer's in-
structions, if supplied. Otherwise, proceed as follows.
WARNING: Controls require safety limits utilizing isolated mechanical contacts. Solid state
limit switches are not acceptable and should not be used due to their high leakage currents.
WARNING: Remove power from the control before proceeding.
Replaceable Fuse
The M4RT1 is designed with a field replaceable fuse. The fuse is located on the printed circuit
board. The fuse will blow as a result of an overload condition on Terminals 3, 4 or 5. To replace the
fuse, remove power from the system. Using a small screwdriver or similar tool, remove the fuse
from its holder. Install a Fireye replacement fuse (P/N 23-176) or equivalent 8 amp fuse (e.g. Little-
fuse 225008P, 8 amp, 125V).
WARNING: Turn off the power when installing or removing the control.
INSTALLATION - 69ND1 FLAME ROD
The 69ND1 flame rod proves a gas pilot flame and/or main gas flame. It is a
spark plug
type unit
consisting of
1
/
2
NPT mount, a KANTHAL flame rod, a glazed porcelain insulating rod holder and
a spark plug connector for making electrical connections. The 69ND1 is available in 12,
18
or 24
lengths.
The flame rod may be located to monitor only the gas pilot flame or both the gas pilot and main gas
flames. It is mounted on a
1
/
2
NPT coupling.
The following instructions should be observed:
1.
Keep flame rod as short as possible.
2.
Keep flame rod at least
1
/
2
from any refractory.
3.
Flame rod should enter the pilot flame from the side so as to safely prove an adequate pilot
flame under all draft conditions.
4.
If the flame is nonluminous (air and gas mixed before burning), the electrode tip should extend
at least
1
/
2
into the flame, but not more than halfway through.
WRONG POSITION
OF ROD
INADEQUATE FLAME
PILOT BURNER
CORRECT POSITION
OF PILOT FLAME
CORRECT
POSITION
OF ROD
