User Guide

2 Maintenance schedule (continued)
7
Figure 2-1 Condensate Trap
Condensate disposal
1. This boiler is a high efficiency appliance that produces
condensate.
2. The condensate trap is sized for a 1/2” PVC outlet
connection pipe.
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. Call your qualified service technician to
inspect the boiler and system.
A Neutralizer Kit is available from the factory. Call your
qualified service technician to install.
4. Do not expose condensate line to freezing temperatures.
5. Use only plastic tubing or piping as a condensate drain
line (FIG. 2-2).
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. 2-2).
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.
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. Call your
qualified service technician to inspect
the boiler and system.
Figure 2-2 Condensate Disposal
User’s Information Manual
FRONT VIEW
REAR VIEW
DIR #2000507911 00
TO FLOOR DRAIN
OR NEUTRALIZER KIT
1/2” PVC / CPVC CONNECTION
FROM CONDENSATE
VENT ON APPLIANCE
FROM CONDENSATE
DRAIN ON APPLIANCE
DIR #2000585216 00
CONDENSATE TRAP
NEUTRALIZER KIT
FLOOR DRAIN OR
DRAIN PAN
NOTE: Neutralizer shown
for illustrative purposes only.
Actual neutralizer may vary.