TFTN 085-199 Installation and Operation Manual
29
6.0 CONDENSATE DRAIN
This unit produces liquid condensate in the heat exchanger and venting system as a product of combustion. Steps must be
taken to ensure condensate does not collect in the venting system; therefore, all exhaust piping must slope back to the
boiler a minimu
m 1/4” per linear foot of vent.
Condensate must be drained from the unit into a household drain.
Check with your municipality, or local gas company, to determine if the disposal of combustion
condensate is permitted in your area (e.g., in the
State of Massachusetts
the condensate must be
neutralized prior to entering a drain).
The following are important factors that must be taken into consideration when constructing the condensate drain system:
•
DO NOT
install condensate lines outside. A frozen or blocked drain will cause the condensate to back-up and leak. This
may result in damage to boiler components resulting in a no heat condition; property damage may also occur.
•
NEVER
use copper, steel, or galvanized piping in the construction of the condensate system (condensate is very
corrosive and will corrode most metals).
•
When a condensate pump is used or required, select a pump that is designed for residential furnaces.
All tubing, drains and surfaces that come in contact with condensate draining from the boiler, must
be constructed out of corrosion resistant material; copper, steel and galvanized are not acceptable
materials for draining condensate. Failure to abide by this caution will result in property damage.
The Condensate Trap (Siphon) must be periodically disassembled and cleaned as part of a regular
maintenance plan. Failure to clean the trap regularly can cause condensate drain blockage leading
to boiler malfunction, property damage and even personal injury.
Condensate Trap (Siphon) Assembly
Ensure the condensate trap is properly assembled (or reassembled following service). An
improperly assembled condensate trap could result in flue gas spillage and leeching of carbon
monoxide emissions into the surroundings resulting in serious injury or death.
TFTN085-199
models come with the
Siphon preassembled and installed in the boiler. The installer only needs to remove
the protective cover, inspect the siphon for damage, and connect the included drain hose; see Figure 6-1.
NOTE
: it is recommended to leave the protective cover in place while mounting the boiler, to avoid damaging the siphon
during handling.
Figure 6-1 Siphon Details (TFTN085-199)
Protective Cover
–
only remove
after the boiler is mounted to
the wall. Reinstall the screws
to maintain cabinet sealing.
Disassemble during periodic
maintenance to remove
buildup. Ensure the metal
retaining clip is properly
installed following reassembly.
Drain Hose
–
route to household drain,
condensate pump or neutralizer (check
with your local authority regarding the
disposal of condensate). DO NOT route
drain higher than the Siphon outlet.
Ball Float
Cone
Trap
Retaining Clip
