94
103448-10- 6/18
IX. System Start-up
(continued)
c. Apply the “Boiler Conversion Label” to a
conspicuous surface on, or adjacent to,
the outer boiler jacket. Fill in the date of the
conversion and the name and address of
the company making the conversion with a
permanent marker.
S. Correcting Throttle Screw Mis-Adjustment
(if
required)
Alpine boilers are fire tested at factory and gas valve
throttle screws are preset. However, if boiler does not
start when first turned on, and, the problem cannot
be remedied following “Help” prompts on the boiler
control display, it may be necessary to reset and
readjust the throttle screw according to the following
instructions.
1. Fully close throttle
by turning throttle screw
clockwise until it fully stops.
2. Open throttle screw
c
ounter-clockwise the
number of full (360 degrees) and partial turns
listed in Table 25A for natural gas or Table 25B
for LP gas.
3. Follow instructions in Section L
“Perform
Combustion Test” to verify O
2
(or CO
2
) is within
the range specified in Table 22 for natural gas
or Table 23 for LP gas at both high fire and low
fire.
Boiler
Model
Throttle Position (Number of Counter-clockwise
Turns from Fully Closed Position
ALP080B
6 & 3/4
ALP105B
8 & 1/4
ALP150B
8 & 1/4
ALP210B
9 &1/2
ALP285B
9
Table 25B: Approximate Throttle Screw
Adjustment Values from Fully Closed
Position, LP Gas
Boiler
Model
Throttle Position (Number of Counter-clockwise
Turns from Fully Closed Position
ALP080B
4
ALP105B
4 & 1/4
ALP150B
5
ALP210B
5 & 1/2
ALP285B
4 & 1/2
Table 25A: Approximate Throttle Screw
Adjustment Values from Fully Closed
Position, Natural Gas
The throttle adjustment
values shown in Table 25A and Table 25B are
approximate. The final throttle setting must be
found using a combustion analyzer.
WARNING
Asphyxiation Hazard. If the throttle is very far out of adjustment on the “rich” (counter-
clockwise) side, the boiler burner may be running at 0% excess air or even with air deficiency. Operating
the boiler in this condition may cause property damage, personal injury or loss of life.
At 0% excess air the CO
2
readings will be either 11.9% CO
2
for natural gas or 13.8% CO
2
for LP gas (O
2
will
be 0%) and CO level will be extremely high (well over 1000 PPM).
If the burner operates with air deficiency, the following phenomena may be observed:
% CO
2
will actually drop (% O
2
will increase) as the throttle is turned counter-clockwise
% CO
2
will actually increase (% O
2
will drop) as the throttle is turned clockwise
If the boiler appears to operate with air deficiency, shut down the boiler and follow instructions in
Paragraph S “Correcting Throttle Screws Mis-Adjustment. Then, use a combustion analyzer to verify and
adjust O
2
(or CO
2
) and CO to values shown in Table 22 for natural gas or Table 23 for LP gas.
WARNING
Summary of Contents for Alpine ALP080B
Page 76: ...76 103448 10 6 18 VIII Electrical continued...
Page 77: ...103448 10 6 18 77 VIII Electrical continued Figure 27 Wiring Connection Diagram...
Page 78: ...78 103448 10 6 18 Figure 28 Ladder Diagram VIII Electrical continued...
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Page 147: ...103448 10 6 18 147...
