TM 10-4510-206-14
TO 40P1-6-2-1
5 - 7.
REPAIR PROCEDURES (CONT'D)
1 .1. Load Limit Switch (Applies to Model PBU-100 only) The load limit
switch used on the water pump is identical to the load limit switch
used on the water heater control box assembly.
Use these
i n s t r u c t i o n s t o r e p a i r b o t h s w i t c h e s.
1. On Model PBU-100,
b e f o r e s e r i a l n u m b e r P B U 1 0 0 4 4 2,
remove two
s c r e w s ( 1 ) s e c u r i n g o v e r l o a d h e a t e r ( 2 ) t o s w i t c h ( 3 ).
Separate
heater from switch.
2 . I n s p e c t l o a d l i m i t s w i t c h f o r b r o k e n c a s e a n d d a m a g e d t h r e a d s .
U s e o h m m e t e r t o c h e c k c o n t i n u i t y a c r o s s s w i t c h t e r m i n a l s w i th
switch in ON and OFF position.
3. On Model PBU-100, before serial number PBU100442, inspect overload
h e a t e r f o r b r e a k s o r b u r n s.
4 . Replace any defective items.
5. On Model PBU-100, before serial number PBU100442, position
overload heater (2) on switch (3) and secure with two screws (1).
N O T E
(Items numbers 1 and 2 not present on Model PBU-100, serial number
PBU100442 and subsequent, nor on Model HEI-100)
C h a n g e 7 5 - 5 7
