Crown Boiler Phantom X series, Installation And Operating Instructions Manual, Page: 74 / 136

74
IX. System Start-up
(continued)
2. Test the flow switch
by disabling the primary
loop circulator. The boiler must not start if flow is
not present.
3. Test any other external limits
or other controls
in accordance with the manufacturer’s instructions.
Q. Check Thermostat Operation
Verify that the boiler starts and stops in response to
calls for heat from the heating thermostat and indirect
water heater thermostat. Make sure that the appropriate
circulators also start and stop in response to the
thermostats.
R. Adjust Supply Water Temperature
As shipped, the heating set point supply temperature
is set to 180°F (82.2°C) and, indirect water heater set
point supply temperature is set to 170°F (76.7°C). If
necessary, adjust these to the appropriate settings for the
type of system to which this boiler is connected. See
Section X “Operation” (parameter table) of this manual
for information on how to adjust supply setpoint.
S. Adjust Thermostats
Adjust the heating and indirect water heater thermostats
to their final set points.
T. Field Conversion From Natural Gas to LP
Gas (Propane)
Phantom X models PHNTM399C and PHNTM500C
are factory shipped as natural gas builds and can be
field converted to LP gas. Follow steps below for field
conversion from natural gas to LP Gas.
1. Conversion
of Phantom X models PHNTM399C
and PHNTM500C from one fuel to another is
accomplished using the throttle screw on the gas
valve. Figure 49 “Gas Valve Detail” shows the
location of the throttle screw on the valve. Locate
the throttle screw on the boiler being converted.
WARNING
Explosion Hazard. Asphyxiation Hazard.
This conversion should be performed by a
qualified service agency in accordance with the
manufacturer’s instructions and all applicable
codes and requirements of the authority
having jurisdiction. If the information in these
instructions is not followed exactly, a fire, an
explosion or production of carbon monoxide
may result causing property damage, personal
injury, or loss of life. The qualified service
agency is responsible for proper conversion of
these boilers. The conversion is not proper and
complete until the operation of the converted
appliance is checked as specified in this manual.
2. If conversion is being made on a new
installation,
install the boiler in accordance
with the installation instructions supplied with the
boiler. If an installed boiler is being converted,
connect the new gas supply to the boiler, check for
gas leaks, and purge the gas line up to the boiler
in accordance with the National Fuel Gas Code
,
ANSI Z223.1/NFPA 54 and/or Natural Gas and
Propane Installation Code , CAN/CSA B149.1 or the
requirements of the authority having jurisdiction.
3. Before attempting to start the boiler,
make the
number of turns to the throttle screw called for in
Table 37.
4. Start the boiler using operating instructions
in Figure 47. After the boiler is powered up with
a call for heat, the boiler should go through the
sequence of operation shown in Table 44. Even if
the gas line has been completely purged of air, it
may take several tries for ignition before a flame
is established. If more than 2 tries for ignition are
needed, it will be necessary to press the reset button
to restart the boiler. If boiler does not light, turn
the throttle screw counter-clockwise in 1/4 turn
increments, allowing the boiler to make at least
three tries for ignition at each setting, until the boiler
lights.
Table 37: Approximate Clockwise Throttle
Screw Turns for LP Gas (Propane)
Conversion
Boiler Model
Approximate
Throttle Screw Turns
PHNTM399C 2¾
PHNTM500C 3