Crown Boiler PHANTOM-X SERIES Installation And Operating Instructions Manual page 55

VII. Gas Piping
(continued)
Table 32: Specific Gravity Correction Factors
Specific Correction
Gravity Factor
0.60 1.00
0.65 0.96
0.70 0.93
0.75 0.90
0.80 0.87
0.85 0.81
WARNING
Explosion Hazard. Failure to use proper
thread compounds on all gas connectors
may result in leaks of flammable gas.
Gas supply to boiler and system must be
absolutely shut off prior to installing or
servicing boiler gas piping.
1. Use methods and materials in accordance
with local plumbing codes and requirements of gas
supplier. In absence of such requirements, follow
National Fuel Gas Code, ANSI Z223.1/NFPA 54
and/or Natural Gas and Propane Installation Code,
CAN/CSA B149.1.
2. Use thread (joint) compounds (pipe dope)
resistant to action of liquefied petroleum gas.
3. Phantom X boilers have factory supplied
miscellaneous parts cartons, which include gas-
piping components to connect boiler gas valve(s) to
gas supply system. Install these components prior
to connecting boiler to gas supply system piping as
follows:
Boiler Model Miscellaneous
Parts Carton
PHNTM399C 106315-01
PHNTM500C 106316-01
Models PHNTM399C and PHNTM500C
a. Locate and remove the ¾ in. NPT x 6 in. long
black nipple and ¾ in. NPT external gas shutoff
valve (required).
b. Insert nipple though grommet in left side panel.
Apply pipe dope and thread nipple into gas valve
(PHNTM399C) or gas inlet tee (PHNTM500C).
c. Mount the ¾ in. NPT external gas shutoff valve
onto the nipple threaded end outside of the jacket
left side panel.
d. Install sediment trap, ground-joint union and
manual shut-off valve upstream of mounted
factory supplied manual shut-off valve. See
Figure 35 " Recommended Gas Piping ".
Specific Correction
Gravity Factor
0.90 0.82
1.00 0.78
1.10 0.74
1.20 0.71
1.30 0.68
1.40 0.66
Figure 35: Recommended Gas Piping
4. All above ground gas piping
from manual shut-off valve must be electrically
continuous and bonded to a grounding electrode. Do
not use gas piping as grounding electrode. Refer to
National Electrical Code, NFPA 70 and/or Canadian
Electrical Code Part 1, CSA C22.1, Electrical Code.
Table 33: Min./Max. Inlet Gas Pressure Ratings
Natural/LP
Boiler Model Gas Max,
in. wc (kPa)
PHNTM399C
14.0
(3.49)
PHNTM500C
upstream
Natural Gas LP Gas
Min, Min,
in. wc (kPa) in. wc (kPa)
4.0 8.0
(1.00) (1.99)
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