750-437
Q Series Full Modulation
3-3
Operation
Normal automatic operation is detailed in Table 3.1 and the corresponding AZL indications are shown in Fig 3-1.
Note:
In this manual, AZL display text is shown in brackets, e.g. “{OFF}.”
TABLE 3- 1.
Normal Automatic Sequence Of Operation
Sequence
LMV37
Note
Phase
Action
AZL DISPLAY
TEXT
INDICATOR
C
M
I
V
F
Standby
12
Standby
OFF
No call for heat exists
Call for heat made
22
Fan motor on
Ph 22
Gas press. switches must
be made to progress to
ph24
24
Air volume increased for pre-purge
Ph 24
Pre-purge
30
Pre-purge
Ph 30 _XX
where XX = countdown
timer in seconds
36
Air volume adjusted for ignition
Ph 36
Ignition
38
Ignition transformer energized
Ph 38
Main fuel
40
Fuel valve
Ph 40
Ignition/main flame
42
Ignition
Ph 42
Delay before
modulating
44
Interval 1 pilot stabilization
Ph44 _XX
where XX = countdown
timer in seconds
Released to
modulate
60
Operation (LMV37 responding to
modulating control input)
oP: YY.Y
where YY.Y = % firing rate
Call for heat ends
62
Fuel and air adjust to the low-fire rate
Ph 62
70
After-burn time (confirms no flame)
Ph 70
72
Air volume is adjusted to the post-
purge rate
Ph 72
Post-purge
74
Mandatory post-purge time
Ph 74 _XX
where XX = countdown
timer in seconds
78
Optional post-purge time
Ph 78
User added time (via
parameter)
Low-fire position
10
Home run (fuel actuator referencing)
Ph 10
Actuator self-check
FIGURE 3-1.
AZL Status Indications for Normal Operation
Summary of Contents for ProFire Q Series
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Page 28: ...Installation 2 10 750 437 Q Series Full Modulation...
Page 50: ...Operation 3 22 750 437 Q Series Full Modulation...
Page 82: ...Troubleshooting 6 24 750 437 Q Series Full Modulation...
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