American Water Heater 395T2506NOX Water Heater User Manual


 
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Servicing should only be performed by a Qualied Service Technician
CONTROLS OVERVIEW - CONTROL BOX ASSEMBLY
PRESSURE SWITCHES – ALL MODELS
All BCL 120 thru 250 models are provided with one blower prover switch with +0.38" w.c. setpoint. The blower
prover switch is provided on the heater to verify that the fan is operating. It is a positive pressure switch
whose electrical contacts are normally open. The blower prover switch electrical contacts will close on a rise
in pressure as the blower increases the pressure in the burner. This switch is connected to the blower outlet
pressure tap by a piece of silicone tubing. This tubing must be connected in order for the switch to close the
electrical contacts.
Digital
Thermostat
Ignition
Control
Blower
Prover
Switch
ON/OFF
Switch