71
110332-02 - 6/22
PHTM II
Installation, Operating & Service Instructions
18
Troubleshooting
(continued)
In event of high CO (CO air free greater than 200 ppm for 0-2,000 ft. (0-160 m) or greater than 300 ppm for above
2,000 ft. (610 m)) follow the below steps in specified order:
1. Confirm fuel settings (see Section 14 Start-up and Checkout)
A. Gas valve setting (1) for Natural Gas, (2) for LP
B. Control fuel gas selection [
A06
] (
0
) for Natural Gas, (
1
) for LP
C. Control altitude selection [
A07
] for
(
0
) 0 to 2,000 ft. (0 to 610 m)
(
1
) 2,001 to 6,000 ft. (611 to 1,828 m)
(
2
) 6,001 to 8,000 ft. (1,829 to 2,438 m)
(
3
) 8,001 to 10,100 ft. (2,438 to 3,079 m)
D. Confirm 150/180 LP electrode change (brown colored electrode) for installations above 2,000 ft. (610 m).
2. Perform manual calibration 5 times per Table 15-11 [
A08
].
3. Follow instructions in Section 18 Service and Maintenance to
A. Check burner for damage or deterioration.
B. Check ignitor flame sensor distance to burner per Figure 17-3.
4. Consult manufacturer.
