52
110332-04 - 2/23
PHTM II
Installation, Operating & Service Instructions
14
Start-Up and Checkout
(continued)
10. Perform combustion test.
WARNING
Asphyxiation Hazard.
Use a combustion analyzer to verify proper
operation by checking carbon monoxide (CO)
levels. Failure to use a combustion analyzer
could cause operation of boiler with elevated
CO levels resulting in severe personal injury,
death or substantial property damage.
!
Figure 14-8: Gas Valve Inlet Pressure Tap
Inlet
Pressure
Tapping
A. Boiler is equipped with a screw cap in
vent adapter. Be sure to replace this cap
when combustion testing is complete.
B. Measure carbon monoxide (CO) level after
5 minutes of operation above 50% firing rate.
Ensure door is sealed before taking
combustion readings.
C. For altitudes 0 to 2,000 ft. (0 to 610 m)
CO should not exceed 200 ppm air free. For
altitudes above 2,000 ft. (610 m), CO should
not exceed 300 ppm air free. (In event of
high CO, see Section 18 Troubleshooting).
11. Perform a check of ignition safety shut-off device.
With burner firing, carefully unplug black ignitor/
flame sensor wire at burner door using a pair of
insulated pliers (Figure 14-1). Burner should shut
off immediately.
12. Test any external limits or other controls in
accordance with manufacturer's instructions.
13. Refer to Section 15 Operation to set-up control for
system in which boiler is installed. Some common
set-up tasks include:
A. Setting CH temperature setpoints.
B. Defining boiler and system pump operation.
14. Review User's Information Manual and system
operation with homeowner.
