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6 Condensate disposal
Condensate drain
1. This boiler is a high efficiency appliance that produces
condensate.
2. The side of the boiler has a 1/2 inch PVC union for
connection of a 1/2 inch PVC pipe (FIG. 6-1).
3. Slope condensate tubing down and away from the
boiler into a drain or condensate neutralizing filter.
Condensate from the outdoor boiler 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. 6-1) is available from the factory
(Kit 3087).
4. Install the 1/2 inch PVC tee assembly (shipped with the
unit) as shown in FIG. 6-1.
5. Leave the top of the 1/2 inch tee OPEN. This is needed as
a vacuum break.
6. Do not expose condensate line to freezing temperatures.
Precautions should be taken to protect the condensate
management and disposal system during extended
periods of outdoor temperatures below 32°F.
7. Use only plastic tubing or piping as a condensate drain
line (FIG. 6-1).
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.
8. 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. 7-1 on page 34).
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.
The condensate line must remain
unobstructed, 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.
IMG00387
1/2" PVC TEE ASSEMBLY
(FACTORY SUPPLIED)
1/2" PVC UNION
(FACTORY SUPPLIED)
NEUTRALIZER KIT
FLOOR DRAIN OR
DRAIN PAN
Figure 6-1 Condensate Disposal
Outdoor Knight Boiler Installation & Operation Manual
32