Bradford White UPV Series Service Manual page 18

UPV Service Procedure III – Pressure Switch Testing and Replacement
Pressure Switch Replacement
Step 1. Position gas control power switch to "OFF"
position.
Step 2. Remove the three screws (T20 Torx driver)
from control access cover on blower
assembly and remove cover (see photo 3).
Step 3. Carefully remove pressure switch from
blower housing (see photo 4).
Step 4. Disconnect tubing from pressure switch (see
photo 5).
Step 5. Disconnect red wires from pressure switch
(see photo 6).
Step 6. Reconnect wires from step 5 to new
pressure switch.
Step 7. Reconnect tubing to new pressure switch.
Step 8. Carefully position pressure switch into
blower housing.
Step 9. Position gas control power switch to "ON"
position and verify proper heater operation.
Step 10. Replace control access cover from step 2.
18
Use caution to avoid personal injury.
5
18
WARNING
115 volt potential exposure.
Pressure switch
Slide pressure switch in direction
of arrow while tilting slightly
away from blower housing.
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4
6