4
9
Carbon
Monoxide
-
Never
leave the unit operating while
producing Carbon Monoxide (CO)
concentrations in excess of the
values indicated in Table 3. Failure
to follow this warning may result in
serious injury or death.
Table 4 Gas
Input at Min and Max Power
Model
Mi
n Power
Max
Power
B u r n e r P ower
MBH
MBH
TFTN
085
8.5
85
TFTN
110
11.0
110
TFTN
150
15.0
150
TFTN
199
19.9
199
1. Canada: Altitudes between 2000-4500 ft, de-rate by 10%. Consult local authorities
for de-rating for altitudes above 4500ft.
2. USA: De-rate capacity by 4% for every 1000 ft above sea level, if altitude is above
2000 ft.
the
CO
2
level; clockwise
increase
it.
Wait 1 minute
after each
adjustment for
the CO
2
value
to stabilize.
WARNING! Min
Power a
djustment
is very sensitive.
If the value measured corresponds to
the value given in Table 3
, Min Power
adjustment is complete. Otherwise
continue
with
the procedure.
Attention!!
If Screw 2 has been adjusted, it is
necessary to repeat the 'Ajusting
the CO
2
at Max Power' procedure.
1
3
2
4
2
Adjusting the Gas Valve at Min
Power
Remove cap and adjust screw
2
by
turning counter-clockwise to reduce
Figure 8 - Min
Power
CO
2
Adjustment
4. Ending Adjustment
1.
Exit Test Mode by pressing
the '
Press to
Stop Test
'
button (located in the lower-
left corner of the Burner Test screen
).
2.
Turn down the thermostat and /
or stop
the DHW draw.
3.
Reinstall the
C
ombustion
T
est
P
ort
plug
(
s
ee Figure 6
)
.
4.
Check for and repair any
gas
leaks
.
5.
Reinstall the front cover.
If the
CO
2
(%)
reading a
t Min Power
is
not 0.2
– 1.0%
lower
than the
CO
2
(%)
reading at
Max Power, adjust
the gas
valve following the instructions below.
Otherwise move directly to
the
next
operation.
WARNING
10 %
B u r n e r P ower
100 %
2
Pa
rt
3.
Checking/Adjusting the
CO
2
at Max
and Min Power
Summary of Contents for TFTN
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