Crown Boiler Phantom-X PHNTM210, Installation And Operating Instructions Manual

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Table 24: Number of Clockwise Throttle Screw
Turns for LP Conversion
Boiler Model Gas Valve
Throttle Screw Turns at
Altitude Range
0 - 7000 Ft.
PHNTM210
Dungs
GB-055
(½” NPT)
2¾
4
3¼
4
PHNTM285
Dungs
GB-057
(¾” NPT)
4½
IX. System Start-up
(continued)
6. Verify
that the gas inlet pressure is between the
upper and lower limits shown in Table 20 with all
gas appliances (including the converted boiler) both
on and off.
WARNING
Asphyxiation Hazard. These instructions
include a procedure for adjusting the air-fuel
mixture on this boiler. This procedure requires a
combustion analyzer to measure the O
2
(or CO
2
)
and Carbon Monoxide (CO) levels in flue gas.
Adjusting the air-fuel mixture without a proper
combustion analyzer could result in unreliable
boiler operation, personal injury, or death due to
carbon monoxide poisoning.
7. A label sheet is provided
with the boiler for
conversions from natural gas to LP gas. Once
conversion is completed, apply labels as follows:
a. Apply the “Rating Plate Label” adjacent to the
rating plate.
b. Apply the “Gas Valve Label” to a conspicuous
area on the gas valve.
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.
R. Correcting Throttle Screw Mis-Adjustment
(if required)
Phantom 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
counter-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.
WARNING
The throttle adjustment values shown in Table
25A and Table 25B are approximate. The
final throttle setting must be found using a
combustion analyzer.
Figure 34: Dungs Gas Valve Detail