Bradford White U-TW4-75S-76R-3N - Manual (Page 21)

Pressure Switch Replacement WARNING
115 volt potential exposure. Use caution
to avoid personal injury.
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.
Step 1. Position gas control power switch to
the “OFF” position.
Step 2. Remove the three screws (Phillips screw driver) from control access cover on blower assembly and
remove cover (see photos 4 and 5).
Pressure Switch
Slide pressure switch in direction of
arrow while tilting slightly away
from blower housing.
Step 3. Carefully remove pressure
switch from blower
housing (see photo 6).
Step 4. Disconnect tubing from
pressure switch
(see photo 7).
Step 5. Disconnect yellow wires
from pressure switch
(see photo 8).
U TTW SERVICE PROCEDURE IV
Pressure Switch Testing and
Replacement
Page 21
5
6
7 8
Control Access
Cover Screws
4
R
21