Isophase Flashcards
1
Q
What cools the cooling coils for isophase?
A
TBCW
2
Q
When will the standby fan auto start?
A
Low flow on running fan 10 second time delay
3
Q
When are isophase duct heaters used and why?
A
When plant is shutdown to control humidity
4
Q
What is operating mode also called?
A
Closed loop
5
Q
What mode of operation is required if TBCW is lost?
A
once through
6
Q
Will isophase automatically swap operating mode to once-through mode?
will it swap back?
A
yes
no it will NOT auto swap back
7
Q
When standby fans start, what happens to the running fans?
A
trip
8
Q
Can all 4 fans run at the same time?
A
no
9
Q
What duct is cooled by the cooling coils?
A
B
10
Q
Which ducts have forced air through them by the fans?
A
A and C
11
Q
which fans provide cooling air through which ducts?
A
A1 and B1 for A duct
A2 and B2 for C duct
