285 Issue 1 - Service Manual - Iceberg
10
4.2 Cooler Operation – Auto Sequence
The following sequences are normal operation in Auto mode, with the Networker at
a set comfort level, and the room temperature varying according to the Cooler's
operation and load conditions.
When the Networker is turned ON in Cooler Auto mode, an immediate signal is
sent to the cooler to indicate if the unit is required to operate or not.
If the
comfort level setting is adjusted
on the Networker when operating in
Cooler Auto mode, an
immediate signal
is also sent to the cooler.
Whenever the Networker sends an
OFF
or
ON
signal to the N-E6 module,
both
the pump and the fan will be turned OFF or ON
, however, their operation may
be delayed by the fill and Pre-wet functions.
The Cooler will be turned
ON
, if the room temperature is
0.5
0
C. higher
than the
set comfort level, and
OFF
if the room
temperature is lower.
The ON fan signal from the Networker accompanies a fan speed signal, to
determine the
speed required according to the temperature differential
between the room temperature and set comfort level.
The fan will operate at
minimum speed
, when the room temperature is up to
1
0
C,
above the set comfort level, and is incremented to be at
maximum fan speed
,
when the room temperature is
5
0
C, or more
above the set comfort level.
During normal operation, at
5 minute intervals
, the
Networker updates
the N-E6
module on the temperature differential between room temperature and the set
comfort level, and if the temperature has varied by
0.5
0
C. or more
then the cooler
is adjusted.
However, if the temperature changed rapidly by
2.5
0
C,
or more within the 5 minute
update interval, then the Networker will signal the N-E6 module to
adjust
immediately.
If the room temperature is higher than the set point when the Networker is turned
ON, then the fan will immediately operate at the speed according to the set point,
following the normal ServoSeal, water fill and Pre-wet operations.