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Honeywell HE-300 Humidifier problems...
I have recently installed a honeywell HE300 humidifier in my house in Anchorage, Alaska. The climate is dry, dry, dry and HUM is definitely a huge plus. Most older houses in AK have hydronic base board systems (no ducts). I have mounted the HE-300 on a custom made hydronic fan coil/plenum which is set up as zone 1 (biggest zone) of my hydronic base board system. The house is approx 3000sqft.
The installation is fine, and is controlled by an Ecobee smart stat. Overall the system functions as designed with the exception of generating humidity. The ecobee website logs all the temp and HUM data, which also documents the problem over time.
I have noticed that the DC powered solenoid valve on the HE-300 modulates with some form of on-off cycle/time. I cannot find any technical manual or trouble shooting information from Honeywell that explains the operation of the water circuit, modulation and control. This is a mystery because I would have thought the water solenoid should be on constantly with a call for HUM? Is their a inbuilt sensor in the HE300 that shuts down the water on some form of high limit?
Honeywell do not provide any water flow information which could help troubleshoot the lack of humidity. It is possible to place a 16oz cup or catcher beneath the water injector nozzle (with the media pad removed). How much water flow should I be getting in a minute, or 3, 5 minut minute period? This can be fine tuned by the needle valve (supply pressure dependent) but no guidance is available.
If the unit is started and stopped frequently (zone turned on and off) their can be a reasonable puff of HUM visible on the ecobee log, timed with the solenoid cycle. If the zone is on for a long time (recovering from setback etc) the HUM does not work that well and usually stops completely.
I have tried turning up the water rate using the needle valve to the point the discharge line is overwhelmed, then turned it back a little....plenty of water going through when the valve is on.
I am currently thinking of "hacking" the unit, put in a hard wired 100% on time solenoid valve wired to the fancoil, or rip the HE300 out, junk it and try an Aprilaire 400.
Do any of the forum members have any documentation/test guidance on the HE300 beyond the walmart type information available from their website?