58
Start-Up Procedures
e. Press the
LEFT
and
RIGHT
buttons to
adjust the firing rate from 1% to 100%.
Hold down the
LEFT
or
RIGHT
but-
ton to rapidly increase or decrease the
firing rate.
f. Press the
OK
button while the FAN
icon is highlighted to shutdown the
burner.
g. Cycle power to the Prestige once com-
bustion testing is complete to return to
normal operation.
The combustion levels should be mea-
sured at high firing rate. If the combus-
tion levels are not within the range given
in Table 4 for the firing rate, shut the
boiler down and contact ACV-Triangle
Tube Technical Support. Failure to com-
ply with this requirement could result in
severe personal injury, death or substan-
tial property damage.
If the combustion levels during high fire
(100%) is outside the recommended combus-
tion settings adjust the THROTTLE SCREW
(see Fig. 16. page 27) as follows:
Counter-clockwise adjustment of the throt-
tle screw at High Fire:
O2 decreases and CO2 increases
Clockwise adjustment of the throttle screw
at High Fire:
O2 increases and CO2 decreases
3. Once the combustion level is set at high fire
(100%), manually place the boiler into low
fire (1%) mode by pressing the
LEFT
but-
ton to adjust firing rate down.
4. If the CO2 combustion level during low
fire (1%) is not /- 0.2 of the com-
bustion level measured at high fire, adjust
the plastic OFFSET SCREW under the
cover screw on the top of the gas valve (see
Fig. 16, page 27).
Counter-clockwise adjustment of the OFF-
SET SCREW at Low Fire:
O2 increases and CO2 decreases
Clockwise adjustment of the OFFSET
SCREW at Low Fire:
O2 decreases and CO2 increases
c
Measure Input - Natural Gas Only
1. Ensure the boiler is firing at maximum firing
rate. To manually place the boiler into high
fire mode, reference page 57.
2. Operate the unit for approximately 10
minutes.
3. Turn off all gas appliances within the build-
ing, except the PRESTIGE Excellence.
4. At the gas meter, record the time required
to use one cubic foot of gas.
5. Calculate Natural gas input using the fol-
lowing equation:
3600 x 1000 / number of second recorded
for one cubic foot of gas = BTU/H.
6. The BTU/H calculated should approximate
the input rating listed on the unit.
WARNING
Table 4: Recommended Combustion Levels
Natural Gas
Propane
O2 Min.
2.30%
2.70%
O2 Max.
5.30%
4.70%
CO2 Min.
8.80%
10.70%
CO2 Max.
10.50%
12.00%
CO Max.
100 ppm
100 ppm
