Crown Boiler PHNTM399, Инструкция по установке и эксплуатации

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67
IX. System Start-up
(continued)
increments, allowing the boiler to make at least
three tries for ignition at each setting, until the boiler
lights.
WARNING
Asphyxiation Hazard. The throttle adjustments
shown in Table 24 are approximate. The
final throttle setting must be found using a
combustion analyzer. Leaving the boiler in
operation with a CO level in excess of the value
shown in Table 23 could result in injury or death
from carbon monoxide poisoning.
5. After the burner lights,
complete all steps outlined
in Paragraph L “Perform Combustion Test” and
Paragraph M “Checking/Adjusting Gas Input Rate”
before proceeding.
6. Verify
that the gas inlet pressure is between the upper
and lower limits shown in Table 20 on page 49 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.
Table 24: Approximate Number of Clockwise
Throttle Screw Turns for LP Conversion
Boiler Model Gas Valve
Approximate Throttle
Screw Turns
PHNTM399
GB-057 HO
(¾” NPT)
1¾
PHNTM500
GB-057 HO
(¾” NPT)
1
Table 25A: Approximate Throttle Screw
Adjustment Values from Fully Closed
Position, Natural Gas
Boiler
Model
Throttle Position
(Number of Counter-clockwise Turns
from Fully Closed Position
PHNTM399 4 & 3/4
PHNTM500 4 & 3/4
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
PHNTM399 3
PHNTM500 3 & 3/4