Rodent Screens; Condensate Drain Line; Condensate Piping Arrangement - Crown Boiler BWC Series Installation Instructions Manual

d) 4" galvanized smoke pipe will fit inside the inlet collar on the BWC boiler. Depending upon the exact
OD of the pipe used, it may be necessary to crimp this pipe. Secure with a single #10 sheet metal screw
through the hole in the inlet collar and seal the outside of the joint with silicone. If PVC is used for the
intake system, use a short piece of 4" galvanized pipe to connect the PVC to the boiler. Silicone the outside
of the joint between the PVC and galvanized pipe.
e) Two 90-degree elbows may be used to make the 180-degree air intake termination elbow used on vertical
direct vent installations.
7) Rodent Screens - A rodent screen is provided with the BWC boiler for installation in the air inlet terminal.
8) Condensate Drain Line - All condensate which forms in the boiler or vent system collects in the sump under
the heat exchanger and leaves the boiler through the condensate trap. This trap allows condensate to drain
from the sump while retaining flue gases in the boiler. A length of drain hose is supplied with the boiler and
is connected to the trap as shown in Figure 6.11. This hose may be routed through the back of the boiler or to
either side through the knockouts provided. Route this hose to a drain or other suitable point for disposal. Note
the following when disposing of the condensate:
a) If the condensate drain line must be extended, construct the extension from PVC or CPVC pipe. Insert the
hose provided with the boiler into the end of the extension as shown in Figure 6.11.
b) Condensate is slightly acidic. Do not use metallic pipe or fittings in the condensate drain line. Do not route
the drain line through areas that could be damaged by leaking condensate.
c) Some jurisdictions may require that the condensate be neutralized before being disposed of. Dispose of
condensate in accordance with local codes.
d) Do not route, or terminate, the condensate drain line in areas subjected to freezing temperatures.
e) If the point of condensate disposal is above the trap, it will be necessary to use a condensate pump to
move the condensate to the drain. In such cases, select a condensate pump that is approved for use
with condensing furnaces. If overflow from this pump would result in property damage, select a pump
with an overflow switch and use this switch to shut down the boiler. Alternatively, if heat is a necessity, use
the overflow switch to trigger an alarm.
f) Do not attempt to move the trap from the location shown in Figure 6.11. Do not attempt to substitute
another trap for the one provided with the boiler.
g) The vent shown in Figure 6.11 must be left open for the trap to work properly.
BOILER CONDENSATE IS CORROSIVE. ROUTE CONDENSATE DRAIN LINE IN A MANNER SUCH
THAT ANY CONDENSATE LEAKAGE WILL NOT CAUSE PROPERTY DAMAGE.
SOME JURISDICTIONS MAY REQUIRE THAT CONDENSATE BE NEUTRALIZED PRIOR TO DISPOSAL.
FIGURE 6.11: CONDENSATE PIPING ARRANGEMENT
WARNING
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