Bradford-White Corp PDX75S70F(B, CX), C)*(N Inlet Pressure Switch Replacement, Remove screws

PDX Series

PDX SERVICE PROCEDURE III

Pressure Switch Testing and

Replacement

Inlet Pressure Switch		WARNING
Replacement
		120 volt potential exposure. Use caution
Step 1.	Position gas control power switch	to avoid personal injury.
	to “OFF” position.
Step 2.	Remove the three screws (Phillips screw driver) from control access cover on blower assembly and
	remove cover (see photo 8).
Step 3.	Disconnect the tubing from the pressure switch (see photo 9).
	8	9

Step 4. Remove inlet pressure switch from blower access cover. (see photo 10).

Step 5. Disconnect yellow wires from pressure switch (see photo 11).

Step 6. Attach new inlet pressure switch to blower control access cover.

Remove screws
to remove inlet	10
pressure switch		11

Step 7. Reconnect wires from step 5 to new pressure switch. Step 8. Reconnect tubing to new pressure switch.

Step 9. Replace control access cover from step 2.

Step 10. Position gas control power switch to “ON” position and verify proper heater operation.

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