TESTING
DUAL
FUEL
When the
UT32
is configured for dual fuel operation, testing is the same as
a
heating and cooling system with the exception that a 3 minute time delay is
activated before the
‘Y1’
compressor relay will energize on a call for heating or
cooling.
Mode
will flash to indicate the thermostat is in time delay. Depending on
the mode of operation and equipment configuration,
Heat
or
Cool
will flash when
the
‘Y1’
compressor relay is energized.
Heat 2
or
Cool 2
will flash when the
‘Y2’
compressor relay is energized.
Heat 3
will flash when the auxiliary
‘W1’
relay is
energized.
E.Heat
will flash when the mode is set to emergency heat. Whenever
the thermostat calls for auxiliary heat, the heat pump compressor or compressors
will be de-energized and the auxiliary heat will remain on until the call is satisfied.
LOW BALANCE POINT (Heat Pump or Dual Fuel)
When an outdoor sensor is used with the
UT32
Installer Option 16 allows
you
to
select a low balance point temperature. When the outdoor temperature falls
below the low balance point setting, a call for heat from the thermostat
automatically energizes the
‘W1’
relay and bypasses the
‘Y1’
compressor relay.
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