11
RUV X.X –
This display shows the software revision number. (DV units are
loaded with variable speed drive.)
NR O -
Indicates simple operation of unit as a
U
niversal
S
olar
D
ifferential
T
emperature (
USDT
) controller. You may move to next level of sophistication by
registering your unit and having an authorization code. Change this value to 1 for
activation of third sensor.
Hysteresis Bandwidth –
User can program hysteresis (temperature range for
output control) by using
max
?
, max
=
, min
=
,
and
min
?
.
max
?
1
Pump stops above this temperature (T1, T2, T3)
max
=
1
Pump runs below this temperature if other conditions are
met (T1, T2, T3)
Note: This feature is useful to protect over heating of storage tank (T2) and in
other program version not supported with basic software load.
diff
=
1
Pump runs when temperature difference between collector
T1
(collector) and
T2
(tank) exceeds this value. Factory
setting is 15
o
F. Consult your collector manufacturer for the
recommended value.
diff
?
1
Pump stops when temperature difference between collector
T1
(collector) and
T2
(tank) reaches this value. Factory
setting is 7
o
F. Consult your collector manufacturer for the
recommended value.
