Install Instructions

98
107750-01 - 9/17
XI. Start-Up and Checkout (continued)
16. Perform a combustion test. Boilers are equipped with a screw cap in the vent adapter. Be sure to replace this cap when
combustion testing is complete. Check CO
2
(or O
2
) and CO at both high and low re. Ensure the door panel is sealed
before combustion readings are taken. The boiler may be temporarily locked into high or low re as follows:
a. Fire the boiler through any call for heat.
b. From the Home Screen, press “ADJUST” to enter the adjust menu.
c. Press “ADJUST”.
d. Press “LOGIN”.
e. Press “000”.
f. Enter the password “086”.
g. Press return arrow
to close the keypad.
h. Press “SAVE”.
i. Press “ADJUST”.
j. Press “MANUAL CONTROL”.
k. Press “HIGH” or “LOW” as appropriate.
To return the boiler to automatic modulation, press AUTO FIRE. Note: If the Auto Fire button is not pressed, boiler will
remain in manual re for around 10 minutes. After 10 minutes boiler automatically returns to automatic modulation.
At both high and low re, CO readings should be less than 200 PPM air free. Typical CO
2
and O
2
readings are shown in
Table 11.4. Final readings should be taken with all doors and covers in place. If adjustments are needed, make them as
follows:
i. With burner at high re, adjust throttle as needed to obtain CO
2
(or O
2
) setting shown in Table 11.4:
• To reduce the CO
2
(increase the O
2
) turn throttle clockwise. 
• To increase the CO
2
(reduce the O
2
) turn throttle counter clockwise. 
Make adjustments in increments of 1/8 and 1/4 turns and allow the boiler at least a minute to respond to each
adjustment.
ii. With the burner at low re, adjust offset regulator as needed to obtain CO
2
(or O
2
) setting shown in Table 11.4.
• To reduce the CO
2
(increase the O
2
) turn offset regulator counter-clockwise. 
• To increase the CO
2
(reduce the O
2
) turn offset regulator clockwise. 
Make adjustments in increments no more than 1/8 turns and allow the boiler at least a minute to respond to each
adjustment before making another.
17. Perform a check of the ignition safety shut-off device. With the burner ring, carefully unplug the orange ame rod wire
at the ame rod using a pair of insulated pliers. The burner should shut off immediately.
18. Test any external limits or other controls in accordance with the manufacturer’s instructions.
19. Refer to the Operation Manual to set-up the control for the system in which the boiler is installed. Some common set-up
tasks include:
• Setting the CH and DHW temperature set-points (as shipped, both setpoints are set to 180°F).
• Selecting the type of indirect water heater (if any) and location of DHW pumps.
• Dening the system pump operation.
20. Adjust the heating and indirect water heater thermostats to their nal set points.