Bradford White TW4-75S-76B-3X - Manual (Page 10)

10
Installation (Venting) continued-
Vent pipes serving power vented appliances are classified by building codes as
“vent connectors”. Required clearances from combustible materials must be
provided in accordance with information in this manual under LOCATION OF
WATER HEATER and CLEARANCES, and with National Fuel Gas Code and
local codes.
Venting System Condensation
Condensate formation does not occur in all installations of power vented
heaters, but should be protected against on installations where condensation
can form in the venting system.
Formation of condensation in the venting system of Power Vented water
heaters is dependent upon installation conditions including, but not limited to:
ambient temperature and humidity of installation location;
ambient temperature and humidity of venting space;
vent distance and slope;
and product usage.
In order to effectively control condensate from adversely affecting the
mechanical components of the water heater several methods may be
employed:
1. For horizontal installations the vent pipe can be installed with a
downward slope (not less than 1/8" nor greater than ½” per foot
maximum) and away from the blower motor.
2. In order to prevent condensate from draining back into the blower
(vertical or horizontal runs), a fitting and drain hose is available as a
condensate trap kit (see Table 1 for service part numbers). The all
rubber fitting with drain outlet mounts directly to the blower motor outlet
and is secured with two hose clamps (one to the blower motor outlet
and the other to the vent connector). The plastic tubing is provided to
drain any accumulated condensate away from the water heater and to
a suitable drain. The kit comes complete with instructions for proper
installation of the fitting.
Table 1
Model Service Part
2” (5.1 cm) Blower Outlet (exhaust) 239-42742-00
3” (7.6 cm) Blower Outlet (exhaust) 239-42743-00
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