U.S. Boiler Company K2, Installation Instructions Manual

Page: 96 / 108

96
105294-05 - 5/15
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 fire. The boiler may be temporarily
locked into high or low fire 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 fire for around 10 minutes. After 10 minutes boiler automatically returns to automatic modulation.
At both high and low fire, CO readings should be less than 200 PPM air free. Typical CO
2
and O
2
readings are shown in
Table 11.5. Final readings should be taken with all doors and covers in place.
17) Perform a check of the ignition safety shut-off device. With the burner firing, carefully unplug the orange flame rod wire
at the flame rod using a pair of insulated pliers (Figure 11.1). 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.
• Defining the system pump operation.
20) Adjust the heating and indirect water heater thermostats to their final set points.
Model Fuel %CO
2
%O
2
Max. CO
air Free
K2-080 Natural Gas 8.9 - 9.3 4.6 - 5.3
COAF readings
should be less than
200 ppm.
K2-080 Propane 10.1 - 10.3 5.3 - 5.6
K2-100 Natural Gas 8.9 - 9.3 4.6 - 5.3
K2-100 Propane 10.1 - 10.3 5.3 - 5.6
K2-120 Natural Gas 8.9 - 9.3 4.6 - 5.3
K2-120 Propane 10.1 - 10.3 5.3 - 5.6
K2-150 Natural Gas 8.9 - 9.3 4.6 - 5.3
K2-150 Propane 10.1 - 10.3 5.3 - 5.6
K2-180 Natural Gas 8.8 - 9.1 4.9 - 5.4
K2-180 Propane 10.1 - 10.3 5.3 - 5.6
XI. Start-Up and Checkout
(continued)
Table 11.5: Typical Combustion Readings (Sea Level Only)
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.