101. September 2, 2007
Solar control panel progressing.
102. September 4, 2007
Solar control panel progresses further.
103. September 8, 2007
More solar control system wiring.
104. September 8, 2007
Circulating pumps wired. No more extension cords!
105. September 8, 2007
Resistance Temperature Device (RTD) installed and wired. RTD's internal
resistance changes as temperature changes. The measured resistance is
converted to it's equivalent temperature. The RTD's sit in a temperature
well along the water or glycol flow path.
106. September 10, 2007
Bruce works on solar PLC program.
107. September 10, 2007
Inside of the solar control panel.
(Line filter, upper left, is still missing.)
108. September 10, 2007
Basic (temporary) PanelView display screen.
TE13 = Glycol temp after going thru solar panel,
TE14 = Glycol temp before going thru solar panel,
TE20 = Water temp after going thru Heat exchanger,
TE21 = Five-zone header temp (zones inactive this run),
TE22 = Water temp before going thru Heat exchanger,
TE30 = Water temp before going into solar water heater,
TE40B= Sand layer temp 6" above lowest heat tubes.