Rinnai boiler controller [RE-wrenches]

[Christopher Freitas --- OutBack Power]

Adding the 50MFD motor run Capacitor to the inverter did not solve the
issue - theses Japanese heater systems seem extremely sensitive to power
quality.  

The motor run cap does drastically improve the waveform of the SW - but
mostly when unloaded.  The SW's waveform even at its best is still worse
than any of the HF PWM true sine waves - which are often 1% THD.  These
heaters still seem to notice something... 

The capacitor on the SW also increases the idle power consumption from
16 watts to about 35 or so - which is why we never built it in to the SW
at Trace.  Be sure to put it on a switch if you add one to a system so
it can be connected only when required.

These motor run caps do not seem to make any difference on the FX
waveform other than a slight increase in idle power - a few watts if I
remember correctly.  

On the lousy generator the motor run cap actually made it worse when I
looked at it with a O-scope!  

Christopher

 
Christopher Freitas
Director of Research of Development 
OutBack Power Systems, Inc.
cfreitas at outbackpower.com
Tel 360 435 6030
cell 360 202 4239
19009 62nd Ave NE 
Arlington WA 98223 USA
www.outbackpower.com



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