Crown Boiler Phantom X series, Installation And Operating Instructions Manual, Page: 15 / 136

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IV. Venting
WARNING
Asphyxiation Hazard. Failure to vent this boiler in accordance with these instructions could cause
products of combustion to enter the building resulting in severe property damage, personal injury or
death.
Do not use a barometric damper, draft hood or vent damper with this boiler.
Do not locate vent termination under a deck.
Do not locate vent termination where exposed to prevailing winds.
Do not locate combustion air termination where chlorines, chlorofluorocarbons (CFC’s), petroleum
distillates, detergents, volatile vapors or other chemicals are present. Severe boiler corrosion and
failure will result.
Use specified vent and combustion air pipe diameters.
Do not interchange vent systems or materials unless otherwise specified.
Do not apply thermal insulation to vent pipe or fittings.
Moisture and ice may form on surface around vent termination. To prevent deterioration, surface must
be in good repair (sealed, painted, etc.).
Do not allow low spots in the vent where condensate may pool.
The CPVC vent materials supplied with this boiler do not comply with
Natural Gas and Propane
Installation Code , CAN/CSA B149.1.S1-07 and are not approved for use in Canadian jurisdictions that
require vent systems be listed to ULC S636-2008. In these jurisdictions, vent this boiler using either
stainless steel Special Gas vent or a listed ULC S636 Class IIB venting system.
A. General Guidelines
1. Listed Vent/Combustion Air Systems
a. Install vent system in accordance with National
Fuel Gas Code , ANSI Z223.1/NFPA 54 or
Natural Gas and Propane Installation Code ,
CAN/CSA B149.1 Installation Code for Canada,
or, applicable provisions of local building codes.
Contact local building or fire officials about
restrictions and installation inspection in your
area.
b. The Phantom X may be installed as a direct vent/
sealed combustion boiler or with optional room
air for combustion. Direct vent is recommended
for residential applications. For direct vent,
pipe combustion air from the outdoors directly
to the boiler cabinet. Room air is optional for
commercial applications. For room air, provide
combustion and ventilation air per the
National
Fuel Gas Code
, ANSI Z223.1, or, in Canada,
Installation Code for Gas Burning Appliances
and Equipment
, CGA Standard B149.
c. The following combustion air/vent system
options are listed for use with the Phantom X
boilers (refer to Table 7):
i. Two-Pipe CPVC/PVC Vent/Combustion
Air System - Separate CPVC/PVC pipe
serves to expel products of combustion and
separate PVC pipe delivers fresh outdoor
combustion air. Refer to Part B for specific
details.
ii. Two-Pipe Polypropylene Vent/
Combustion Air System - Separate rigid or
flexible polypropylene pipe serves to expel
products of combustion and separate rigid
polypropylene or PVC pipe delivers fresh
outdoor combustion air. Refer to Part C for
specific details.
iii. Two-Pipe Stainless Steel Vent/Combustion
Air System
- Separate stainless steel pipe
serves to expel products of combustion
and separate PVC or galvanized steel pipe
delivers fresh outdoor combustion air. Refer
to Part D for specific details.
iv. Room Air for Combustion – CPVC/
PVC, polypropylene, or stainless steel pipe
serves to expel products of combustion and
combustion air is supplied from the boiler
room. Refer to Part E for specific details.
2. Vent/Combustion Air Piping
a. Do not exceed maximum vent/combustion air
lengths listed in Table 8. Vent/combustion
air length restrictions are based on equivalent
length of vent/combustion air pipe (total
length of straight pipe plus equivalent length
of fittings). Table 9 lists equivalent lengths for
fittings. Do not include vent/combustion air
terminals in equivalent feet calculations. Use
vent/combustion air equivalent length worksheet
provided in Table 10.