Messing around w/ my TAM7 (actually AAM7) and trying to understand real word results. It is setup with a slide in hydronic coil and the RS-485 hydro control board. I have W1-W3 jumpered for max fan, but I would like to slow it down a bit to find the heating sweet spot (highest supply temp possible)
Here is what I know from manuals:
- there are three dip switches on the hydro board. If W's are not jumpered, changing these around seem to change fan speed (putting all on = max fan) - this setting corresponds with an external hydro coil box so maybe it needs the extra oomph
- There is a dip switch bank called S-2. Setting these will adjust CFM/ton (both heating and cooling)
- There is also a separate dip switch bank which sets outdoor unit size and states a multiplier formula
- I have tried messing with all of these as well as the jumpering W1-W3. I have an el-cheapo anemometer, but when setting CFM/ton higher, I can't sense any real difference in wind speed. Is this setting more a volume thing than velocity?
- Will setting the OD unit multiplier affect the fan for total CFM? I only have a 2t outdoor unit. If I set it for 3t will it be fooled into blowing harder? I can't believe a max 800cfm fan can be told to put out 1000cfm somehow.
- Are either of these settings affected by OTHER inputs... like maybe the hydro board or W1-W3 jumpers overrides them all? Or is it CFM/Ton x OD multiplier x W setting? Very confusing.
- Either way, I am getting way less than the manual listed output temps for the fan speeds. I know that it's a product of GPM's, water temp, ideal conditions, etc, but how far off should I be? In some cases the manual says 130F and I'm getting 105F supply air. This is a DAT reading in a plenum maybe 10-12 inches downstream of the coil.
Sorry for the confusing questions but the manual does a poor job of explaining the effects of the settings, and there are just too damned many options!
Thx for any help!
(not for a TAM7, but same idea on the multiplier)