Platinum Plus
45
1. No differential temperatures from level to level in this regime. All the levels operate at
exactly the same target temperature.
2. Gradually increasing air flow. Note that the examples follow a rule of approximately
1/3 more air at each succeeding level. Increases of 25% to 50% from one level to the
next work well with factory default settings in related parameters.
Since the Platinum Plus can use any of these ventilation levels at the same target
temperature, how does it pick the particular one it needs? The brief answer is that it doesn’t
change ventilation levels instantly when there is a small difference from the target
temperature. It has programmed ‘patience’ factors, so that it waits a minute or two before
making corrections. The factory default patience factors are 3 minute delay on ventilation
level increase, and 1 minute delay on ventilation level decrease. These delays work well with
the 20% to 50% recommended change in ventilation from level to level.
The Platinum Plus also has special rules for emergency conditions and such. Please refer
to the Details, Precision Mode section.
As ventilation levels increase, we get into the transitional region. Consider this example:
Exhaust Fans Tunnel Fans
Lev
Diff
On
Off
1 2 3 4 1 2 3 4 5 6 7 8 9
10 100 200
◙ ◙ ● ●
11 240 60
◙ ◙ ● ●
12 120 180
◙ ◙ ◙ ◙
13 60 240
◙ ◙ ◙ ◙ ○ ○ ○ ○ ○ ○ ○ ○ ○
14 300
◙ ◙ ◙ ◙ ○ ○ ○ ○ ○ ○ ○ ○ ○
15 1.0 150 150
◙ ◙ ◙ ◙ ◙ ○ ○ ○ ○ ○ ○ ○ ○
16 1.5 300
◙ ◙ ◙ ◙ ◙ ○ ○ ○ ○ ○ ○ ○ ○
17 2.0 300
◙ ◙ ◙ ◙ ◙ ◙ ◙
1. At level 15 we incorporate wind chill differentials in the transitional region just before
tunnel ventilation.
2. The tunnel fans rotate on timer to make them all wear evenly. As we see in level 17, it
is not necessary to rotate any fans; use the fan rotation feature as desired to make the
fans wear evenly and for best reliability.
3. In the event there are no exhaust fans, simply continue increasing ventilation from
level to level using only the tunnel fans.
Upon reaching tunnel ventilation levels, the differentials start over again, with no
differential for the first tunnel level.
Exhaust Fans Tunnel Fans
Lev
Diff
1 2 3 4 1 2 3 4 5 6 7 8 9
18
T
◙ ◙ ◙ ◙
19 1.0
T
◙ ◙ ◙ ◙ ◙
20 2.5
T
◙ ◙ ◙ ◙ ◙ ◙
21 4.0
T
◙ ◙ ◙ ◙ ◙ ◙ ◙
22 5.5
T
◙ ◙ ◙ ◙ ◙ ◙ ◙ ◙
23 7.0
T
◙ ◙ ◙ ◙ ◙ ◙ ◙ ◙ ◙
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