Crown Boiler PHNTM080 - Page 91

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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.Theboilermaybetemporarilylocked
intohighorlowreasfollows:
a) From the Home Screen, press “MENU” to enter the main menu.
b) Press “SETTINGS”.
c) If prompted for a password, use the “+1” key to raise the password to “005” and press SUBMIT, then NEXT (if you
accidentally scroll past 005, press EXIT to return to the main menu and start over).
d) Review the Warning and press ACCEPT to continue to the Settings Menu.
e) At the Settings Menu select “MANUAL INPUT”.
f) Press HIGH FIRE HOLD or LOW FIRE HOLD 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untilthedisplayreturnstotheHomeScreen.Thishappensautomaticallyifthescreenisnottouchedfor
a period of time, which varies depending on which screen is open. From the manual input screen, it takes 12min:45s.
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 11.5. 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ring,carefullyunplugtheorangeamerodwireat
theamerodusingapairofinsulatedpliers(Figure13.1).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 Section 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.




  
2
%O
2



80MBH Natural Gas 9.0 5.1 200
80MBH Propane 10.2 5.4 200
100MBH Natural Gas 9.0 5.1 200
100MBH Propane 10.2 5.4 200
120MBH Natural Gas 9.0 5.1 200
120MBH Propane 10.2 5.4 200
150MBH Natural Gas 9.0 5.1 200
150MBH Propane 10.2 5.4 200
180MBH Natural Gas 9.0 5.1 200
180MBH Propane 10.2 5.4 200
TABLE 11.5: TYPICAL SEA LEVEL COMBUSTION READINGS