Install Instructions

16
Figure 12: Typical Vent Installation
6. Vent pipe to chimney must not be smaller than outlet
on draft hood or damper. Although single wall vent
pipe may be used, Type B is recommended. The
venting system must be arranged so that only the
boiler is served by the damper device. Installation
per paragraph (C) complies with this provision.
7. Where two or more appliances vent into a common
vent, the area of the common vent should at least
equal the area of the largest vent plus 50% of the
area in the additional vents. Do not connect the vent
of this appliance into any portion of mechanical
draft system operating under positive pressure.
8. Vent pipe should have the greatest possible initial
rise above the draft hood consistent with the head
room available and the required clearance from
adjacent combustible building structure. Vent Pipe
should be installed above the bottom of chimney to
prevent blockage.
9. Vent pipe should slope upward from draft hood to
chimney not less than one inch in four feet. Doivent
présenter des tronçons horizontaux dont la pente
montante est d’au moins ¼ po par pied (21 mm/m)
entre la chaudière et l’évent. No portion of vent
pipe should run downward or have dips or sags.
Vent pipe must be securely supported. Les sections
horizontales doivent être supportées pour prévenir le
échissement.
10. Vent pipe must be inserted into but not beyond
inside wall of chimney liner. Seal tight between vent
pipe and chimney.
11. Do not install non-listed (AGA, CGA, CSA, ETL or
UL) vent damper or other obstruction in vent pipe.
V. VENTING (continued)
WARNING
E. IF AN EXISTING BOILER IS REMOVED -
When an existing boiler is removed from a common
venting system, the common venting system is likely to
be too large for proper venting of the appliances
remaining to it.
At the time of removal of an existing boiler, the
following steps shall be followed with each
appliance remaining connected to the common
venting system placed in operation, while the other
appliances remaining connected to the common
venting system are not in operation:
1. Seal any unused openings in the common venting
system.
2. Visually inspect the venting system for proper size
and horizontal pitch and determine there is no
blockage or restriction, leakage, corrosion, and other
deciencies which could cause an unsafe condition.
3. Insofar as is practical, close all building doors and
windows and all doors between the space in which
the appliances remaining connected to the common
venting system are located and other spaces of the
building. Turn on clothes dryers and any appliance
not connected to the common venting system. Turn
on any exhaust fans, such as range-hoods and
bathroom exhausts, so they will operate at maxi mum
speed. Do not operate a summer exhaust fan. Close
replace dampers.
4. Place in operation the appliance being inspected.
Follow the Lighting (or Operating) Instructions.
Adjust thermo stat so appliance will operate
continuously.
5. Test for spillage at the draft hood relief opening
after 5 minutes of main burner operation. Use the
ame of a match or candle, or smoke from a
cigarette, cigar or pipe.
6. After it has been determined that each appliance
remain ing connected to the common venting system
properly vents when tested as outlined above, return
doors, win dows, exhaust fans, replace dampers and
any other gas burning appliance to their previous
conditions of use.
7. Any improper operation of the common venting
system should be corrected so the installation
conforms with the National Fuel Gas Code, ANSI
Z223.1 and/or CAN/CSA B149.1, Installation
Codes. When resizing any portion of the common
venting system, the common venting system
should be resized to approach the minimum size as
determined using the National Fuel Gas Code,
ANSI Z223.1 and/or CAN/CSA B149.1, Installation
Codes.