60
Start-Up Procedures
c Check Vent Piping and Combustion Air
Piping.
Check for gas-tight seal at every con-
nection and seam of the venting and
combustion air piping.
Venting system must be sealed gas-tight
to prevent flue gas spillage and potential
carbon monoxide emissions, which will
result in severe personal injury or death.
c Check Gas Piping
Check around the unit for gas odor fol-
lowing the procedure outlined in this
manual on Page 58.
If any gas leaks are found or suspected,
shut the unit down immediately. Use a
gas detection device or bubble test to
locate the source of the gas leak and
repair at once. Do not operate the unit
until the leak is corrected. Failure to
comply with this procedure could result
in severe personal injury, death or sub-
stantial property damage.
c Verify Flame Pattern and Combustion
1. Check the flame pattern through the
inspection port of the heat exchanger.
The flame should be blue and stable.
The flame should be the length of the
burner head openings.
The combustion testing and adjustments
must be performed by a qualified
installer, service agency or the gas suppli-
er. All combustion measurements must be
performed with calibrated equipment to
ensure proper reading and accuracy.
2. Test for CO2 or O2 and for CO during
high firing rate. The combustion read-
ings should be within the range listed in
Table 2. The CO level should not
exceed 100 ppm when combustion is
correct. Perform the following proce-
dure to manually place the burner into
high fire.
a. Press the round INSTALLER button.
Reference Fig. 31, page 41.
b. Enter the installer access code “054” by
using the LEFT and RIGHT buttons to
select a digit and the UP and DOWN
buttons to change the digit. Press the
OK button to enter the access code.
c. Press the RIGHT button to highlight
the Manual Operation icon then
press the OK button.
d. Press the OK button while the FAN
icon is highlighted to manually fire the
burner and power the CH circulator.
An adequate CH load must be present to
dissipate the heat generated during the
combustion test. If an adequate CH load
is not available, an indirect water heater
can be used to dissipate the heat by cre-
ating a DHW call which will enable the
DHW circulator.
WARNING
WARNING
WARNING
NOTICE
Manual Operation
Released
O
O
O
CH
CH1
FAN
DHW
SYS
CH2
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