Service manual

8
FCX INSTALLATION AND SERVICE MANUAL
INSTALLATION
4 - ALTERNATIVE FLUE CONNECTIONS
All combustion appliances consume a quantity of air
proportional to their capacity. If unit is installed using inside
make up air, ventilation louvers must be installed in
confined areas according to code. To avoid corrosion, the
combustion air must not contain any harmful agents.
Halogenated hydrocarbons, containing combinations of
chlorine or fluorine that are found in solvents, paints, glues,
propellants, household cleaning products, etc.
The FCX
heating system is a condensing heating system, which
means that the combustion products from the appliance are
discharged at low temperature (120° to 212°F) and saturated
with humidity. Consequently, an airtight, corrosion-resistant
flue system must be provided. It is possible to use an existing
flue as long as it is lined. The lining must be inserted so that it
does not retain any condensate and so that any condensates
are transferred to a drain located at the foot of the flue or
directly back to the heating system condensate trap. The
material for the lining must be chosen specifically for use with
a condensing heating system. Suitable materials certified for
use in such combustion product systems are 904 L stainless
steel, PPS polypropylene, and PVDF. Specialized companies
market these systems and indicate the tubing assembly
procedures to be applied.
Some flue components available from Monitor Products are
as follows:
Flue Connection Adapter -
Adapter is a 4.33 to 3.15 inch (110 to 80 mm) off center reducer.
Fig. 22
Reference No 9103
Rigid Polypropylene Tubes
Fig. 23
Reference No Length inch (m) Ø inch (mm)
2256 39.37 (1) 3.15 (80)
9049 39.37 (1) 4.33 (110)
9102
78.7 (2)
4.33 (110)
Polypropylene Elbows
Fig. 24
Reference No Type Elbow Ø inch (mm)
2259 90° 3.15 (80)
9048 90° 4.33 (110)
Leaf Guard
Fig. 25
Reference No
2210 4.33” (110)
Should be used on the end of 110 mm piping run
Fig. 27
Roof evacuation above the ridge
Flue components:
Flue connection kit with off-center reducer (item 1)
4.33 in (110mm) polypropylene tube, 1m long (item 3),
4.33 in (110mm) polypropylene tube, 2m long (item 4),
4.33 in (110mm) 90° polypropylene elbow, (item 5)
L1 < 32.8 ft (10m)
Note:
•With this arrangement, the burner air inlet hose (10) is
disconnected from the burner. The burner draws air directly
into the unit from the premises in which the
heating system is
installed. Combustion air must be supplied to the premises
with a vent (11) or alternative means. Condensate drains down
the inside of the flue into the heat exchanger and out the
condensate drain tube.
•If you must deflect the flue system, use 45° degree elbows.
Use 45 degree elbows instead of 90° to lessen flue restrictions.
Use Condensate Tee
_
Rigid tubes can be run inside
a building, or inside an existing
negative pressure conduit.