Installing A Condensate Drain - Navien NCB-190/060H Installation & Operation Manual

9.6.3 Direct Vent Application –
Horizontal Installation
In cases where a 12" horizontal clearance is not
possible, provide a vertical clearance of at least
36" with the exhaust above the intake but do not
exceed 20' .
i n .
m ) m
0 0 m
1 2 " ( 3
Exhaust Gas
Intake Air
Exhaust
Maximum
length 20'
(6 m)
Minimum
length 36"
Intake
(91 cm)
The illustration is intended for
Note
●
reference purposes only.
Direct the exhaust away from any
●
building openings.
During cold weather situations, the
●
temperature of the exhaust will be
much warmer than the ambient air.
Therefore, you will see water vapor
being produced at the termination.

9.7 Installing a Condensate Drain

Refer to the following examples to install a
condensate drain hose (field supplied) to the
common vent system. The condensate drain hose
prevents condensate or rain from entering the
exhaust system and gathering above the Common
Vent Collar Kit. The exhaust vent must be sloped
down towards the drain to prevent water from
collecting within the pipe.
Intake
End
Cap
Siphon loop
End
Cap
Siphon loop
Installing a Common Vent System
Exhaust
Drain hose
Drain
Exhaust
Intake
Drain hose
Drain
93