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AHE Series 4 Direct Vent Wall-Mounted Boilers — Boiler Manual
1c
Prepare boiler location — vent system
When removing boiler from
existing common vent system:
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.
a.
Seal any unused openings in the common venting
system.
b.
Visually inspect the venting system for proper size
and horizontal pitch and determine there is no
blockage or restriction, leakage, corrosion or other
deficiencies which could cause an unsafe condition.
c.
Test vent system — 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 maximum speed. Do not
operate a summer exhaust fan. Close fireplace
dampers.
6
d. Place in operation the appliance being inspected.
Follow the operating instructions. Adjust
thermostat so appliance will operate continuously.
e.
Test for spillage at draft hood relief opening after 5
minutes of main burner operation. Use the flame
of a match or candle.
f.
After it has been determined that each appliance
remaining connected to the common venting
system properly vents when tested as outlined
above, return doors, windows, exhaust fans,
fireplace dampers, and any other gas-burning
appliance to their previous conditions of use.
Any improper operation of common venting system
should be corrected so the installation conforms with
the National Fuel Gas Code, ANSI Z223.1–latest edition.
Correct by resizing to approach the minimum size as
determined using the appropriate tables in Part 11 of
that code. Canadian installations must comply with
B149.1 or B149.2 Installation Code.
Wall thickness
See Table 2 below for wall thicknesses for venting.
Table 2
Wall Sleeve
Wall Thickness
Minimum
5" - 9"
5"
9" - 13"
9"
13" - 24"
13"
Part number 550-141-887/0800
Maximum
9"
13"
24"
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