11
Prs (Pressure)
Exch Test (Heat Exchanger Integrity Test)
Menu
Status
Aux
Fuel
Flue Test
Prs
Exch
Test
Temp
Room
CO
Up
Down
Enter
C225
I N D U S T R I A L E O S A N A L Y Z E R
CO
2
H
2
CO ∆T PRS
PRESSURE
PRESS TO
ZERO
Menu
Status
Aux
Fuel
Flue Test
Prs
Exch
Test
Temp
Room
CO
Up
Down
Enter
C225
I N D U S T R I A L E O S A N A L Y Z E R
CO
2
H
2
CO ∆T PRS
COp 000
O2% 20.9
X 00
PRESS
Menu
Status
Aux
Fuel
Flue Test
Prs
Exch
Test
Temp
Room
CO
Up
Down
Enter
C225
I N D U S T R I A L E O S A N A L Y Z E R
CO
2
H
2
CO ∆T PRS
PRESSURE
P 0.00
mBar
10:07:35
Menu
Status
Aux
Fuel
Flue Test
Prs
Exch
Test
Temp
Room
CO
Up
Down
Enter
C225
I N D U S T R I A L E O S A N A L Y Z E R
CO
2
H
2
CO ∆T PRS
COp 000
O2% 20.9
X 00
PRESS
Menu
Status
Aux
Fuel
Flue Test
Prs
Exch
Test
Temp
Room
CO
Up
Down
Enter
C225
I N D U S T R I A L E O S A N A L Y Z E R
CO
2
H
2
CO ∆T PRS
EXC TEST
TO START
PRESS
Menu
Status
Aux
Fuel
Flue Test
Prs
Exch
Test
Temp
Room
CO
Up
Down
Enter
C225
I N D U S T R I A L E O S A N A L Y Z E R
CO
2
H
2
CO ∆T PRS
SAMPLE
IN
PROGRESS
TIME 50
Menu
Status
Aux
Fuel
Flue Test
Prs
Exch
Test
Temp
Room
CO
Up
Down
Enter
C225
I N D U S T R I A L E O S A N A L Y Z E R
CO
2
H
2
CO ∆T PRS
Variance
CO 00
O2 00
X 00
Rotate dial to
Prs
Press
“
t
“ DOWN to zero
to atmosphere,
Connect true draft hose
and probe into P1 . Use
both P1 and P2 for
differential . Place probe
tip in stack to measure
draft . Connect static
pressure hose to P1 and
P2 to measure differential
pressure . UEi recommends
the ASP1 static probe
tips to measure static
pressures .
Rotate dial to
Exch
Test
Rotate test
selector to Exch Test .
Call for heat on the
system . Observe and
wait for O2 readings to
stabilize .
Prior to the blower
turning on, and after
readings have stabilized,
press the SEND button .
This will store the Pre-
Blower test segment .
After the blower turns
on press PUMP to start
the Post- Blower test .
The meter will wait 60
seconds and then record
the Post-Blower values
for CO, O2 and Excess
Air . Test results will
automatically be stored
to exchange reports .
Report includes both
Pre and Post Blower
test segments and
differences .
Results are displayed at
the end of the test and
you can view through
the “MENU” go to the
“REPORT” screen and
select EXCH . Select
“VIEW” and scroll to
desired log . (See page 7)
Press “SEND” to print .
Place true draft hose and probe tip in
flue to measure draft . You can also
use the combustion draft probe for
measuring pressure .
Press “Send” to print results or press
and hold “Send” to log results . (See
page 7)
There are many methods to test heat exchanger integrity . One of these is to observe the Excess Air, O2 and CO readings both before
and after the blower turns on . If the heat exchanger is sealed your O2 and CO readings should remain fairly stable . A breach in the heat
exchanger may allow fresh air to be forced into the flue after the blower turns on due to a pressure increase in the plenum . The result may
be a rise in the measured O2 in the stack gas and an increase in the Excess Air . In some sealed systems the fresh air drawn in through
the breach may reduce the combustion air available leading to an increase in the CO reading . If either of these situations are present it is
probable that there is a problem with the Heat Exchanger which may require additional testing and inspection .
NOTE: Many cracks are invisible to borescopes or the naked eye, and only open or separate from pressure or temperature changes during
operations .
Note: Pressure readings are also available on “Flue Test” and “Aux” selector positions .
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