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Gas Fired Boiler
Harsco Industrial, Patterson-Kelley Technical Service 1.877.728.5351
24
Interior Component Clearances
All vent system components shall be installed so as to maintain the following required minimum clearances:
Table 3.5.3.2
Combustible
Non-Combustibles
Unlisted single wall metal pipe
Do NOT Use
Do NOT Use
Single wall PVC pipe
Do NOT Use
Do NOT Use
UL 1738 listed Category IV vent
Per manufacturer’s listing
Per manufacturer’s listing
Figure 3.5.3.2
3.5.3.3 Flue Connection
Figure 3.5.3.3
The complete exhaust with drain system is shown in the figure. The
boiler connector (provided) is designed to accept a 10”
OD
nominal
flue pipe. This connector incorporates provisions to drain
condensate formed in the vent system using a 3/4”
OD
drain stub.
This drain stub should be connected with the condensate drain on
the boiler. The condensate drains shall have a 4” tall trap to prevent
the passage of flue gases through the condensate system.
The boiler vent should not be
connected into any portion of
another mechanical draft system
without consulting the vent
manufacturer. The boiler shall not
be connected to any part of a vent
system serving a Category I
appliance, nor shall a Category I
appliance be connected to any part
of the vent system serving this
appliance. For Category II
common venting, refer to local
venting codes. Improper
interconnection of venting systems
may result in leakage of flue gases
into occupied spaces.
N
OTE
!
The condensate formed from
combustion flue gases is acidic.
The condensate shall be drained in
accordance with local code
requirements. A condensate
neutralizer may be required by
local code.
Reference: NFPA 54/ANSI Z223.1 National Fuel Gas Code
4” Tall Condensate Trap
Summary of Contents for SC-2000
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