Complete Start Up Procedure - Dunkirk DKVLT-050 Installation, Operation & Maintenance Manual

FIGURE 9-3 Gas Valve - Models
050/075/100/150/200 MBH
Throttle Screw
FIGURE 9-4 Gas Valve - Model 299 MBH
9 - START UP PROCEDURE
Fire, explosion, asphyxiation and electrical shock
hazard. Read this instruction and understand all
requirements, including requirements of authority
having jurisdiction before making adjustments. Failure
to follow these instructions could result in death or
serious injury.
2.
Perform combustion test on HIGH fire using calibrated
combustion analyzer. Adjust CO2 to within specifications by
rotating the Throttle Screw, counterclockwise
CO2 level, clockwise
9-3, and 9-4.
After adjusting CO2 to correct level, verify:
(1) CO PPM level is in specified range and
(2) flame signal is in specified range.
See Appendix A page 78.
CO2 level, CO PPM level, and flame signal for HIGH fire
are given in the following tables.
Natural Gas
Propane
HIGH Fire Combustion - 50/75/100/150/200 MBH
Natural Gas
Propane
3.
Switch to LOW fire in boiler System Test. On user
interface push Enter. "HIGH power" starts flashing. Scroll
Throttle Screw
down to "Low Power". Push Enter. "Low Power" stops
flashing and becomes solid. Boiler is now locked in LOW
fire.
Note
Perform combustion test on LOW fire using calibrated
combustion analyzer. Adjust CO2 to within specifications
by turning Offset Screw, clockwise
level, counterclockwise
adjusting CO2 to correct level, verify
(1) CO PPM level is in specified range and
(2) flame signal is in specified range.
CO2 level, CO PPM level, and flame signal for LOW fire see
following tables.
41
!
WARNING
to decrease CO2 level. See Figures
HIGH Fire Combustion - 299 MBH
CO2
Gas
Min Max
9.0% 9.3%
10.0% 11.0
CO2
Gas
Min Max
9.0% 9.5%
10.0% 11.0
Adjust Offset Screw slowly and
in small steps, no more than 1/8
of a turn each time. See Figures 9-5 and 9-6.
to increase
Flame
signal
CO
Design
Target
9.3%
<200ppm 6.5 – 7.5
10.5%
Flame
signal
CO
Design
μA
Target
9.5%
<200ppm 6.5 – 7.5
11.0%
to increase CO2
to decrease CO2 level. After
P/N 240011326, Rev. B [04/15/2016]
μA