Our own experiments with the LION 'look-alike' have followed a very similar path so far. We are also running another variant using electrolytically deuterated diapads. The only thing of interest in the latter test is a modest radiation peak (2-3x background) which seems to be coincident with cooling - we are cycling this between 300-600 - the peak looks to be coincident with the 310-340C region, but mostly on the way down rather than on the way up. Since we are not yet equipped for 'livestream' data display the proof of this will have to wait until the run stops and we pull the SD card from the logger.
Bremsstrahlung not only occurs when the LENR reaction begins but also when it ends. You may be seeing Bremsstrahlung when the LENR reaction is ending. Heat is not always generated by the LENR reaction. SO heat production is a bad indication to judge if LENR is active or not.
Weak LENR systems produce ionizing radiation and sub atomic particles. Heat may not be produced.