Combustion Air And Vent Piping; General; Removal Of Existing Boiler From Common Vent System - UTICA BOILERS UCS 380 Installation, Operation And Maintenance Manual

WARNING
!
Fire, explosion, and asphyxiation hazard. Improper
installation could result in death or serious
injury. Read these instructions and understand all
requirements before beginning installation.
WARNING
!
ABS/PVC venting shall not to be used this product.
Use of DWV plumbing pipes to vent this boiler shall
be prohibited.
Use of cellular core PVC (ASTM F891), cellular core
CPVC, or Radel® (polyphenolsulfone) in venting
systems shall be prohibited.
Covering non-metallic vent pipe and fittings with
thermal insulation shall be prohibited.
Failure to follow these instructions could result in
death or serious injury.
Follow venting manufacturer's equivalent lengths
Note
for speciality fittings.

6.1 General

• Installations shall comply with Authority having jurisdiction
and in absence of such with:
» U.S. ANSI Z223.1 /NFPA 54 in the United States
» CSA B149.1 in Canada.
• This boiler requires a dedicated direct vent system or may
be category IV Indoor air.
• Vent connections serving appliances vented by natural draft
shall not be connected into any portion of mechanical draft
systems operating under positive pressure.
• Materials used in the U.S. shall comply with Authority
having jurisdiction and in absence of such with: ANSI/
ASTM D1785, ANSI/ASTM F441, ANSI/ASTF493, UL1738 or
ULC S636.
• Canadian installations only: All venting material, primer
and glue must be listed to ULC S636.
• Canadian installations only: First 3 ft. (0.9m) of plastic vent
pipe from vent connector must be readily accessible for
visual inspection.
• Support piping in accordance with pipe manufacturer's
instruction and authority having jurisdiction. In absence
of manufacturer's instruction use pipe hooks, pipe straps,
brackets, or hangers of adequate and strength located
at intervals of 3 ft (1m) or less. Allow for expansion/
contraction of pipe.
• Venting system must be free to expand and contract.
• Vent system shall have unrestricted movement through
walls, ceilings and roof penetrations.
• Wall and roof openings must be framed to provide support
attachment of termination assemblies.

6 - COMBUSTION AIR AND VENT PIPING

• If vent is penetrating ceilings and /or floors, openings
shall have means of fire-stopping in joist areas and proper
firestop spacer assemblies installed.
• Standard roof flashing methods shall be employed to install
roof flashing.
• Assemble piping in accordance with pipe manufacturer's
instructions.
• Unless specifically stated in other sections of this manual,
slope exhaust pipe minimum of 1/4" per foot; or vent
manufacturer's recommendation whichever is greater, back
toward the boiler.
• Support horizontal sections of vent pipe to prevent sags
capable of accumulating condensation. Unless otherwise
specified support venting every 3 ft. (1m) using steel
strapping or equivalent.
• Unless specifically stated in other sections of this manual,
use vent pipe manufacturer's specified material for
lubrication during assembly of vent pipe.
• Check for proper joint construction when joining pipe to
.
fittings
• Manufacturer requires use of an approved mechanical
fastener, which may vary per vent pipe manufacturer, at
every push-fit gasket connection when using a single wall
polypropylene vent system.
6.2 Removal of Existing Boiler From Common Vent
System
When existing boiler is removed from common venting
system, common venting system is likely to be too large for
proper venting of appliances remaining connected to it.
After removal of existing boiler, following steps shall be
followed with each appliance remaining connected to common
venting system placed in operation, while other appliances
remaining connected to common venting system are not in
operation:
• Seal any unused openings in common venting system.
• Visually inspect venting system for proper size and
horizontal pitch. Determine there is no blockage or
restrictions, leakage, corrosion and other deficiencies which
could cause an unsafe condition.
• When practical, close all building doors, windows, and
all doors between space in which appliances remaining
connected to common venting system are located and
other spaces of building. Turn on clothes dryer and any
appliance not connected to common venting system.
Turn on exhaust fans, such as range hoods and bathroom
exhaust so they will operate at maximum speed. Do not
operate summer exhaust fan. Close fireplace dampers.
• Turn on appliance being inspected. Follow lighting
instructions. Adjust thermostat so appliances will operate
continuously.
• Test for spillage at draft hood relief opening after 5
minutes of main burner operation. Use flame of match or
candle, smoke from cigarette, cigar or pipe.
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PN 240011662 Rev. K [01/31/2020]