91
nOTiCE
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.
at 0% Excess air the CO
2
readings will be either 11.9% CO
2
for natural gas or 1.8% 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 counterclockwise
% CO
2
will actually increase (% O
2
will drop) as the throttle is turned clockwise
If the boiler appears to operate with air deficiency, turn the throttle
clockwise to increase the amount of
Excess air to the burner.
as the throttle is turned clockwise, the CO
2
level will rise, eventually peaking @ 11.8% or 1.8%, depending
of the type of gas being used, before falling (conversely, O
2
level will drop to 0% before rising). after this
happens, continue turning the throttle clockwise, until CO
2
level drops (or O
2
level increases) to the values
shown in Table 2 or Table 25.
Boiler
Model
Altitude Range
0 - 7000 Ft.
% CO
2
% O
2
Range
CO, PPM
ALP080
10.1 - 8.5
(High Fire)
11.6 - 7.7
(Low Fire)
5.6 - 8.0
(High Fire)
3.2 - 9.2
(Low Fire)
Less than
100 PPM
ALP105
ALP150
ALP210
ALP285
ALP399
ALP500
Table 25: Recommended Combustion Settings,
LP gas
WaRning
The pressure regulator has been factory set using precision instruments and must never be adjusted in
the field. The gas valve outlet pressure is the same for both natural gas and propane. Make sure that
all adjustments are made with the throttle, not the pressure regulator. attempting to adjust the pressure
regulator will result in damage to the gas valve and may cause property damage, personal injury or loss of
life.
7. Perform a combustion test. Refer to Paragraph K
above for details.
8. While the burner is at high fire adjust the throttle as
needed to obtain the CO
2
(or O
2
) settings shown in
the Table 25:
• To reduce the CO
2
(increase the O
2
) turn the
throttle clockwise
• To increase the CO
2
(reduce the O
2
) turn the
throttle counter-clockwise
Make adjustments in increments of 1/8 to 1/4 turn
and allow the boiler at least a minute to respond to
each adjustment before making another. In general,
the CO level will be at its lowest somewhere in the
CO
2
range shown in this table.
9. Verify that the gas inlet pressure is between the
upper and lower limits shown in Table 17 with all
gas appliances (including the converted boiler) both
on and off.
10. A label sheet is provided with the boiler for
conversions from natural to LP gas. Once conversion
is completed, apply labels as follows:
• Apply the “Rating Plate Label” adjacent to the
rating plate.
• Apply the “Gas Valve Label” to a conspicuous
area on the gas valve.
• 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.
Xi. System Start-up (continued)
Summary of Contents for Alpine ALP080
Page 40: ...40 Figure 29 Condensate Trap and Drain Line V Condensate Disposal continued ...
Page 56: ...56 VIII Electrical continued ...
Page 57: ...57 VIII Electrical continued Figure 35 Wiring Connections Diagram ...
Page 58: ...58 Figure 36 Ladder Diagram VIII Electrical continued ...
Page 64: ...64 Figure 39 Modular Boiler Direct Vent Termination X Modular Installation continued ...
Page 65: ...65 Figure 40 Modular Boiler Concentric Vent Termination X Modular Installation continued ...
