56
10
Condensate disposal
Condensate drain
1. This boiler is a high efficiency appliance that produces
condensate.
2. The boiler has a 1/2 inch (12.7 mm) PVC union for
connection of a 1/2 inch (12.7 mm) PVC pipe (FIG.
10-1).
3. Slope condensate tubing down and away from the boiler
into a drain or condensate neutralizing filter. Condensate
from the Knight XL will be slightly acidic (typically with
a pH from 3 to 5). Install a neutralizing filter if required
by local codes.
A Neutralizer Kit (FIG. 10-1) is available from the
factory.
4. Do not expose condensate line to freezing temperatures.
5. Use only plastic tubing or piping as a condensate drain
line (FIG. 10-1).
6. A condensate removal pump is required if the boiler is
below the drain. When installing a condensate pump,
select one approved for use with condensing boilers and
furnaces. The pump should have an overflow switch to
prevent property damage from condensate spillage. The
switch should be wired in series with the blocked drain
switch inside the boiler (see FIG. 11-1).
Use materials approved by the authority
having jurisdiction. In the absence of other
authority, PVC and CPVC pipe must comply
with ASTM D1785 or D2845. Cement and
primer must comply with ASME D2564 or
F493. For Canada use CSA or ULC certified
PVC or CPVC pipe, fittings, and cement.
NOTICE
NOTICE
To allow for proper drainage on large
horizontal runs, a second line vent may
be required and tubing size may need to
increase to 1 inch (25 mm).
The condensate line must remain
unbstructed, allowing free flow of condensate.
If condensate is allowed to freeze in the line
or if the line is obstructed in any other
manner, condensate can exit from the boiler
tee, resulting in potential water damage to
property.
DIR #2000585216 00
CONDENSATE TRAP
NEUTRALIZER KIT
FLOOR DRAIN OR
DRAIN PAN
Figure 9-1
Condensate Disposal
Installation & Operation Manual
NOTE:
Neutralizer shown
for illustrative purposes only.
Actual neutralizer may vary.
