Velocity Phantom-X PHNTM399C Installation, Operating And Service Instructions Download

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106309-03 - 4/19

IV. Venting

B. CPVC/PVC Venting - C. Polypropylene Venting (continued)

• Install screen and vent terminal

(supplied with boiler). See Figure 16 for

appropriate configuration.

• Brace exterior piping if required.

ii.

Combustion Air Piping

• If possible, locate combustion air

termination on the same roof location as
the vent termination to prevent nuisance
boiler shutdowns. Combustion air
terminal may be installed closer to roof
than vent. Alternatively, boiler may be
installed with vertical roof vent terminal
and sidewall combustion air terminal.

• Size roof opening to allow easy insertion

of combustion air piping and allow

proper installation of flashing and storm

collar to prevent moisture from entering
the structure.

- Use appropriately designed

vent flashing when passing through

roofs. Follow flashing manufacturers’

instructions for installation

procedures.

- Extend combustion air pipe to

maintain minimum vertical

and horizontal distance of 12 in.

(300 mm) from roof surface. Allow
additional vertical distance for
expected snow accumulation. Provide
brace as required.
- Install storm collar on combustion air

pipe immediately above

flashing. Apply Dow Corning Silastic

732 RTV Sealant or equivalent

between combustion air pipe and

storm collar to provide weather-tight

seal.

• Install screen and combustion air

terminal (supplied with boiler). See

Figure 16 for appropriate configuration.

• Brace exterior piping if required.

C. Polypropylene Venting

NOTICE

Do not exceed maximum vent/combustion air
system length. Refer to “2. Vent/Combustion
Air Piping” under “A. General Guidelines” of
this section for maximum vent/combustion air
system length.

Use only vent and combustion air terminals
and terminal locations shown in “3. Vent/
Combustion Air Terminals” under “A.
General Guidelines” of this section.

WARNING

Asphyxiation Hazard. Follow these instructions
and the installation instructions included by
the original polypropylene venting component
manufacturers, M&G/DuraVent or Centrotherm,
whichever applicable. Failure to do so could
cause products of combustion to enter the
building, resulting in severe property damage,

personal injury or death. Where a conflict

arises between M&G/DuraVent or Centrotherm
instructions and these instructions, the more
restrictive instructions shall govern.

Do not mix vent components or joining

methods for listed manufacturers.

Examine all components for possible

shipping damage prior to installation.

All condensate that forms in the vent must

be able to drain back to the boiler.

1. Components

a. Listed polypropylene vent system manufacturers

are shown in Table 16. It is the responsibility of
the installing contractor to procure polypropylene
vent system pipe and related components.

All listed polypropylene vent system

manufacturers comply with the requirements
of ULC-S636-08 ‘Standard for Type BH
Gas Venting Systems’.

ii.

Centrotherm Eco Systems InnoFlue SW

Rigid Vent and Flex Flexible Vent, and
Z-Flex Z-Dens Single Wall Rigid Vent and
Flexible Vent comply with the requirements
of UL 1738 ‘Standard for Safety for Venting
Systems’.

b. See Table 17A for specific M&G Duravent

components.

c. See Table 17B for specific Centrotherm Eco

Systems components.

d. See Table 18 for specific Z-Flex Z-Dens

components.

2. Field Installation of Polypropylene

Adapters

a. Vent Connector (see Figure 17)

No adapter is required for M&G DuraVent

PolyPro vent pipe unless vent diameter
is reduced per Table 8. See Table 17A
for M&G DuraVent boiler adapters for
reduced vent diameter. An adapter is always
required for Centrotherm InnoFlue vent
pipe and Z-Flex Z-Dens vent pipe. See
Table 17B for Centrotherm InnoFlue boiler
adapters and Table 18 for Z-Flex Z-Dens
boiler adapters.