9 Condensate disposal
Condensate drain
1.This boiler is a high efficiency appliance that produces condensate.
2.The bottom of the boiler has a 1 1/4 inch pipe for connection of the condensate trap (FIG.
3.Slope condensate tubing down and away from the boiler into a drain or condensate neutralizing filter. Condensate from the Knight wall mount 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 is available from the factory (Kit 3087).
4.Do not expose condensate line to freezing temperatures.
5.Use only plastic tubing or piping as a condensate drain line (FIG.
Installation & Operation Manual
| NOTICE | Use materials approved by the authority |
| having jurisdiction. In the absence of other | |
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| authority, PVC and CPVC pipe must comply |
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| with ASTM D1785 or D2845. Cement and |
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| primer must comply with ASME D2564 or |
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| F493. For Canada use CSA or ULC certified |
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| PVC or CPVC pipe, fittings, and cement. |
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| To allow for proper drainage on large |
| NOTICE | |
| horizontal runs, a second line vent may be | |
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| required and tubing size may need to increase |
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| 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.
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.
Figure 9-1 Condensate Disposal
CONDENSATE
TRAP
REMOVABLE CAP
FOR CLEANING
TRAP
CONDENSATE DRAIN CONNECTION - ROUTE TO FLOOR DRAIN OR NEUTRALIZING FILTER USING
3/4" PVC TUBING
IMG00159
56 
