Condensate Drain - NTI Matrix Installation And Operation Instructions Manual

Matrix

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 that condensate does not collect in the venting system; therefore, all exhaust
piping must slope back to the boiler a minimum 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 notes that must be taken into consideration when constructing the condensate drain
system (See Figure 6-1 for further details):
 DO NOT install condensate lines outside. A frozen or blocked drain will cause the condensate to fill the
combustion chamber. This will result in a no heat condition, as the unit will shut down, and damage to the
flame sensor, and components can occur.
 NEVER use copper, steel, or galvanized piping in the construction of the condensate disposal system as
condensate is very corrosive and will corrode most metallic drains and sewer pipes.
 When a condensate pump is used or required, select a pump that is designed for residential furnaces.
If the combustion chamber has been flooded due to the condensate drain backing up, or
for any other reason, the combustion chamber door must be removed and the inside of
the boiler must be inspected for component damage, e.g. the internal insulation at the
front and back of the chamber. Failure to follow these instructions may result in fire,
property damage, serious injury or death.
Figure 6-1 Condensate Drain Piping
Installation and Operation Instructions
Boiler Condensate Drain
Corrugated Outlet Tube routed
to household drain, condensate
pump or neutralizer