Combustion Air And Ventilation Openings; Insufficient Ventilation And Combustion Air - Watts AERCO Modulex EXT Commercial Series User Manual

Modulex EXT Commercial Series Boilers User Manual
CHAPTER 4: Installation Instructions
Please note that 10" and 12" PVC can be heavy and expensive. Alternative vent materials, such
as AL29-4C or polypropylene should be considered prior to installation.
The plastic components, primers and glues of the certified vent system must be from a single
system manufacturer and not mixed with other manufacturer's vent system parts.
The Inspection Port should be plugged with an appropriate plug (not included).
Figure 4-15: Installed Flue Exhaust Diameter Reduction Adaptor Kit

4.21 COMBUSTION AIR AND VENTILATION OPENINGS

Provisions for combustion and ventilation air must be made in accordance with section 5.3, Air
for Combustion and Ventilation, of the National Flue Gas Code, ANSI Z223.1/NFPA 54., or
Sections 7.2, 7.3 or 7.4 of CAN/CSA-B149.1-05, installation codes, or applicable provisions of
the local building codes.

4.21.1 Insufficient Ventilation and Combustion Air

BOILER DAMAGE AND OPERATIONAL FAILURES may occur due to insufficient or improper
openings for combustion air and/or ventilation of the boiler room.
Provisions for combustion air and ventilation are always required, regardless of whether the
combustion air is taken from the outside (sealed combustion) or inside (room air used as
combustion air).
Insufficient ventilation of the boiler room can lead to high air temperatures. This can result in
boiler damage. Note the following:
•
Make sure that intake and exhaust openings are sufficiently sized and no reduction or closure
of any openings takes place.
•
When a combustion air or ventilation problem is not resolved, do not operate the boiler.
OMM-0095_0H
GF-139
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
FLUE VENT PIPE
INSTALL FLUE
PIPING TO ADAPTER
WITH RTV LIQUID
SILICONE AND
WORM-DRIVEN
HOSE CLAMP
ADAPTER ASSEMBLY
EUROPEAN TO AMERICAN
STANDARD FLUE ADAPTER
3 feet
(914.4 mm)
Test Nipple
should be
installed
within first
3 feet of
flue start.
Page 43 of 144
09/15/2017