Armstrong Air Conditioning A97DSMV, Руководство по установке

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507029-03 Page 16 of 68 Issue 1622
Use the following steps to correctly size vent pipe diameter.
The following steps shall be followed for each appliance
connected to the venting system being placed into operation,
while all other appliances connected to the venting system
are not in operation:
1. Seal any unused openings in the common venting
system.
2. Inspect the venting system for proper size and horizontal
pitch. Determine that there is no blockage, restiction,
leakage, corrosion, or other deficiencies which could
cause and unsafe condition.
3. Close all building doors and windows and all doors
beween 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 appliances 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.
4. Follow the lighting instructions. Turn on the appliance
that is being inspected. Adjust the thermostat so that
the appliance operates continuously.
5. After the main burner has operated for 5 minutes, test
for leaks of flue gases at the draft hood relief opening.
Use the flame of a match or candle.
6. After determining that each appliance connected to
the common venting system is venting properly, (step
3) return all doors, windows, exhaust fans, fireplace
dampers, and any other gas furning appliances to their
previous mode of operation.
7. If a venting problem is found during any of the preceding
tests, the common venting system must be modified to
correct the problem.
Resize the common venting system to the minimum vent
pipe size determined by using the appropriated tables
in Appendix G. (These are in the current standards of
the National Fuel Gas Code ANSI Z223.1.)
Figure 17
EXHAUST PIPE
Figure 16
Horizontal Application
NOTE: All horizontal runs of exhaust pipe must slope back toward unit.
A minimum of 1/4” (6 mm) drop for each 12” (305 mm) of horizontal
run is mandatory for drainage.
NOTE: Exhaust pipe MUST be glued to furnace exhaust fittings.
NOTE
: Exhaust piping should be checked carefully to make sure
there are no sages or low spots.