Installation / Operation Instruction Manual

Table Of Contents
Page 15
a tee with the branch connection sized to allow for
insertion of a ue gas analyzer probe. The branch
connection must be resealable with a cap or other
means to ensure the vent system remains sealed.
(See Figure 4)
Consideration must be given to the placement and
orientation of the ue gas sampling port to ensure that
condensate is free to ow back into the unit and not
collect anywhere in the vent system - including in the
ue gas sampling port.
2.B.1.b Exhaust Vent Terminal -
An exhaust vent terminal must be installed. If an
exhaust vent terminal is not available with the certied
vent system, the manufacturer suggests the use of a
coupler tting from the certied vent system into which
the vent terminal screen can be installed. Be sure
to install and terminate both vent and combustion air
pipes per the instructions in this section.
Figure 4. Test Port
Table 4. Allowable Single Wall Stainless Steel Vent Suppliers and Part Numbers
Manufacturer Model Numbers (abbreviated)
external to the unit. A ue gas sampling port available
as a component of the ULC S636 certied vent system
is preferred. However, if one is not available with the
certied vent system, manufacturer suggests using
Table 5. Allowable Polypropylene Vent Manufacturers / Trade Names
Manufacturer Model Numbers (abbreviated)