need help to clarify the recirculation fans logic on the 748

[windshearDK 52]

I am loving this bird a lot! Can't wait for the rainmaker to be implemented on the other aircraft as well as the EFB.

One thing I haven't been able to figure out is the recirculation fans on the 748F. They are off in this picture, but looking at the overhead I do not see any switches that can turn them on. Am I missing something? What is the logic behind this in case there is no switch for recirculation fans?

 

 

 

any information or help is appreciated!

 

 

[pete_auau 1,158]

On the  fcom   page  of  the  748  page  on 885  it  says   it  suppose  to be  on the  ecs  panel  it  shows  the  upper-recirc-lwr    switches  but  in the  sim they  are  not  there,  but  only  the  fan  switch  as  you have posted

Edited October 2, 2018 by pete_auau

[mfrantz 45]

Only passenger aircraft have recirculation fan switches. In the freighters there are no switches and the recirculation fans are set automatically.

The FCOM pages 883-890 describe the passenger aircraft Air Conditioning system (model ident 806) and pages 891-900 the freighters Air Conditioning system (model ident 914). 

 

 

[windshearDK 52]

4 hours ago, mfrantz said:

Only passenger aircraft have recirculation fan switches. In the freighters there are no switches and the recirculation fans are set automatically.

The FCOM pages 883-890 describe the passenger aircraft Air Conditioning system (model ident 806) and pages 891-900 the freighters Air Conditioning system (model ident 914). 

 

 

Interesting, so the fact that they still feature on the ECS page is simply down to this nuance not being changed in the EICAS in the cargo version?

[downscc 1,327]

20 minutes ago, windshearDK said:

Interesting, so the fact that they still feature on the ECS page is simply down to this nuance not being changed in the EICAS in the cargo version?

I thought it was done purposefully to elicit questions from beta testers and astute users such as you.  At one point it was even more curious in that the 1 2 3 would sometimes disappear and that attracted me down this rabbit hole.  The labels are fixed and all is as it should be with regard to fans.

[mfrantz 45]

37 minutes ago, windshearDK said:

Interesting, so the fact that they still feature on the ECS page is simply down to this nuance not being changed in the EICAS in the cargo version?

As I said before:

In the freighters there are no switches and the recirculation fans are set automatically.

There are no switches but the are fans, which are set automatically and their status is shown on the ECS page.