AM Series Boiler & Water Heater User Manual
CHAPTER 8
– UNIT START-UP
OMM-0100_E
•
GF-146
•
11/15/2019
Technical Support
•
(800) 526-0288
•
Mon-Fri, 8 am - 5 pm EST Page 101 of 170
Combustion Calibration
- Continued
8.
Set value of parameter
2201
to LOW. The Burner 1 (Master) will now run for 20 minutes at
low fire input.
9.
Wait 2 to 3 minutes for the CO
2
to stabilize.
10.
Compare the CO
2
reading with the low fire range given in Table 8-1, making sure to use the
range for the gas type in use. The CO
2
reading must be inside the specified range; if not,
STOP the unit and call the Factory service department (see phone number on the last cover
page).
11.
Set Parameter 2201 in the Installer Menu (Section 9.16) to OFF.
12.
Repeat this process for burners 2, 3, and 4 as applicable, using parameters 2202-2204 to
calibrate each burner in turn.
13.
Close the combustio
n analysis probe “H” in Figure 6-2 with a suitable cap in accordance
w
ith the vent pipe manufacturers’ instructions.
WARNING!
Once the analyzer probe cap in Figure 6-2 is correctly installed with the unit at high fire,
check that there are no leaks and that the cap is mechanically secure.
8.8 Lost Ignition Procedure
If the burner will not stay lit long enough to perform combustion calibration, perform the following
steps:
Lost Ignition Procedure
1.
Ensure the gas pressure to the unit is between 3"-13" W.C., ensure that parameter 3002 is
set correctly on each burner, and that the gas valve has the appropriate gas orifice for either
natural gas or propane.
2.
Turn the setpoint to
OFF
.
3.
For burner 1, turn parameter 2201 to
IGN
, for burner 2 use parameter 2202, etc.
4.
Change the setpoint to 90°F.
5.
Allow the unit to fire. Monitor parameter 1008 (flame strength). The minimum flame
strength is 3.0. If the burner does not light, back the adjustment screw "E" fully out
counterclockwise.
6.
Repeat ignition trial. If the burner fails to stay lit, turn the adjustment screw one turn
clockwise.
7.
This procedure may be repeated for LOW and HIGH fire if necessary.
8.9 Minimum Water Flow
This unit is self-protected against low water flow. A flow meter (Item 16 in Figure 2-7)
continuously monitors the water flow to each burner. If the water flow decreases below the
Minimum Water Flow
in Section 11:
Technical Data
, the burner automatically shuts off.
This value is adjustable via parameter 3035.
