IS255
‐
21A
J
&D
Manufacturing
•
Eau
Claire,
WI
54701
•
1
‐
800
‐
998
‐
2398
•
www.jdmfg.com
P a g e
|
23
*
Note:
All
the
fan
banks
use
the
Effective
temperature,
which
can
be
warmer
than
ambient°.
**Hidden
if
not
used.
The
duty
cycle,
will
cycle
a
fan
bank
on
and
off,
when
fan
would
normally
be
off.
The
duty
cycle
can
be
applied
to
fan
bank
#1
or
#2.
See
configuration
menu
to
activate
the
duty
cycle.
When
should
I
start
my
fans?
The
industry
has
found
lactating
cows
producing
100LB
or
more,
can
overheat
when
the
night
air
stayed
around
61°
ambient.
This
was
with
cows
laying
in
freestalls
and
no
air
movement.
This
was
at
12:30
to
2:00
AM
in
the
morning,
after
the
fans
turned
off.
At
59°
and
below
they
did
not
overheat.
Cows
in
60lb
production
did
not
overheat
at
night
unless
air
temperature
was
approximately
72°.
Please
note
humidity
was
high.
Variable
speed
fans
The
controller’s
variable
speed
output
changes
with
the
temperature.
The
hotter
it
gets,
the
faster
it
goes.
You
can
adjust
the
{P35}
minimum
speed
and
the
{P36}
full
speed.
When
the
fan
will
start
Variable
speed
fans
are
usually
connected
to
a
circulating
fan
relay.
The
circulating
fan
relay
will
stop
the
fan
when
it
gets
too
windy
or
cold.
(Note:
All
fans
run
at
same
speed
but
can
start
at
different
temperatures)
The
fans
use
the
Effective
temperature,
which
is
warmer
than
the
ambient
temperature
after
a
hot
day.
Manually
forcing
the
fan
speed
For
testing
the
fans,
you
can
manually
force
it
to
a
fixed
speed
{P38}.
When
P38
is
set
to
11,
the
speed
varies
with
the
temperature.
Setting
it
between
1
‐
10
will
force
the
fans
to
run
at
a
fixed
speed,
1=10%
5=50%.
You
must
remember
to
set
it
back
to
11,
so
fans
speed
adjusts
automatically.
P29
MPH
at
which
the
fans
will
turn
off.
With
optional
wind
meter.
If
you
have
open
sidewalls,
and
its
really
windy
outside,
you
can
save
electric
by
having
your
fans
turn
off
automatically.
12
3
60
P30
Duty
cycle,
off
minutes.
(For
cold
weather
ventilation**
2.0
.1
25.5
P31
Duty
cycle,
on
minutes
(
For
cold
weather
ventilation)**
2.0
.1
25.5
Table
3
Continued
