100
107774-02 - 4/18
Table 12.5A: Typical Natural Gas Combustion Readings (Sea Level Only)
Boiler Size
Measured High Fire %O
2
**
Maximum CO Air-Free
Range
Target
135
4.7-5.6
4.9
200ppm
150
180
** Low Fire Range and Target values are the same as High Fire above. Ensure low fire O
2
reading is greater
than or equal to high fire O
2
reading.
Boiler Size
Measured High Fire %CO
2
*
Maximum CO Air-Free
Range
Target
135
8.7-9.2
9.1
200ppm
150
180
* Low Fire Range and Target values are the same as High Fire above. Ensure low fire CO
2
reading is less
than or equal to high fire CO
2
reading.
Model
# Counter-clockwise Turns
(From Fully Closed)
135
12-1/4
150
10
180
15
Table 12.5B: Starting Number of Throttle Turns for Natural Gas
XII. Start-Up and Checkout
(continued)
NOTICE
In some cases, such as when the gas valve is replaced, the throttle may be far enough out of
adjustment that it is not possible to fire the boiler while “dialing in” the CO
2
(or O
2
) using a combustion
analyzer. In such a case, do the following:
1. Turn the throttle screw clockwise until it stops turning.
2. For natural gas applications, turn the throttle screw counter-clockwise by the number of turns shown
in Figure 12.5B.
3. For LP gas applications set the preliminary throttle setting per conversion kit instructions.
4. Start the boiler using the lighting instructions on Page 100.
5. Once the boiler is firing, use a combustion analyzer to adjust the CO
2
(or O
2
) to its final value as
described above.
NOTICE
This boiler has a limited warranty, a copy of which is included with this boiler. It is the
responsibility of the installing contractor to see that all controls are correctly installed and are operating
properly when the installation is complete.
Summary of Contents for K2WTC-135
Page 81: ...81 107774 02 4 18 X Domestic Hot Water Piping continued Figure 10 1 Domestic Hot Water Piping...
Page 89: ...89 107774 02 4 18 XI Wiring continued...
Page 90: ...90 107774 02 4 18 Figure 11 8 Internal Wiring Connections Diagram XI Wiring continued...
Page 101: ...101 107774 02 4 18 Lighting and Operating Instructions XII Start Up and Checkout continued...
Page 142: ...142 107774 02 4 18 XVI Repair Parts continued...
Page 145: ...145 107774 02 4 18 XVI Repair Parts continued...
Page 148: ...148 107774 02 4 18 XVI Repair Parts continued...
Page 150: ...150 107774 02 4 18 XVI Repair Parts continued...
Page 152: ...152 107774 02 4 18 XVI Repair Parts continued 120 121 122 123 124 125 126 127...
Page 159: ...159 107774 02 4 18 SERVICE RECORD DATE SERVICE PERFORMED...