Specifications

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Note:
A random start delay time between 180 and 240
seconds is generated at power up.
Figure 16: MicroTech III unit controller terminal locations
The IV/PR(H8) terminals of the
MicroTech III unit controller are
used for motorized valve / pump
restart. This terminal passes a
voltage signal whenever the
unit compressor is turned on.
This signal is detected by a
pump restart relay providing a
N.O. or N.C. set of contacts for
heat pump loop circulation
pump or motorized valve
control. When used with a
system control (by others), the
relay operation accommodates
turning off circulation pumps
during unoccupied periods with
a safety override dependent, at
minimum, on WSHP’s need.
The IV/PR(H8) terminals may
be “daisy chained” between
200 units.
Figure 17: Location of configuration jumpers on the
MicroTech III unit controller