View Full Version : Eclipse burner has poor pilot
10-22-2007, 12:40 AM
I have an Eclipse burner on a Mammoth RTU. Honeywell 7895 trips on pilot ign quite often. Flame rod and igniter have been cleaned repeatedly. More powerful transformer has been installed. Pilot line has been cleaned. Gas pressure is correct and air has been adjusted several times. The 7895 has been tested by the local honeywell rep on his test equip and it is good. Grounding has been checked and all wires have either been replaced or tested for continuity. Any ideas???
10-22-2007, 08:15 PM
electrical interference ..??
ifn' ya gotta good pilot ...
ya gotta good pilot ...
10-22-2007, 08:22 PM
join the club, I've got 9 of them on one account that does
this all the time. You change the linkage, and all is good,
next day, out again on the frickin failed ignition. All I
know is you got to have the fuel air mixture perfect and
don't never, ever, ever, ever even think about even lookin
At it. Cause if you do, you will piss it off and it will fail again. Trust me, I feel your pain.
10-27-2007, 01:30 AM
Tried lots of different settings with little or no effect. Power flame and Gordon Piatt give their pilots a separate pilot tube or burner. The eclipse puts the pilot gas in the main burner tube which causes a lot of turbulence. It appears that they sacrificed dependability for their quest for efficiency
I had several in a dryer system for a printing press system, the best thing that was ever done was to install a bell across the pilot flame fail light and show the operator how to press the button when the bell rings.
10-27-2007, 05:48 AM
have been in your shoes also! Some of the things that worked for me where, use a megger to varify you flame rod and wire are not leaking to ground lowering your signal. Reguardless of what the manual says adjust your pilot pressure while watching the flame, if you have to much pressure your pilot lifts off.
12-08-2007, 02:46 AM
Solved the problem by installing a uv sensor in place of the flame rod. Full 5vdc every time. It only has to see the flame instead of feel it. Been trouble free since! YEEHAW!
11-05-2008, 11:15 PM
Jbuster, I have a similar problem, w/ a mammoth rtu, please explain your procedure of replacing the rod w/ the uv sensor & what make/model please.
11-07-2008, 01:11 AM
Haven't been to those units in quite while. Honeywell 7800 series flame safety relay. Local honeywell rep was able to match up an amplifier and a uv sensor to the flame safety relay. There is a plug at the bottom of the burner under the burner tube that you can remove and install anipple and the uv sensor. Or install it in the port where the flame rod is. Good luck!
My old screen name was jbuster
11-10-2008, 12:01 PM
Yep, switching to a UV setup is a known fix for these types of situations.
A few years back Mammoth released a new setup procedure for the Eclipse burner. You might want to try getting a copy if you don't have one.
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