The bases of two of the pins are colored black and
enable the user to properly orient the unit. The pine
are not actually numbered on the relay, but are
numbered on the illustration so the individual pins
can be identified in the text.
(2) Use a multimeter and test between 2 and
4. There should be continuity. Then, test between 2
and all other pins except 4. There should be no con-
t i n u i t y
(3) Test between pins 5 and 7. There should be
continuity. Now, test between pin 7 and all other
pins except 5. There should be no continuity be-
tween pin 7 and the other pins.
(4) Apply a source of 24-volt dc power to pins 3
and 6. This should operate the relay.
When testing the relay with a source
of power, do not allow the test probes
to contact pins 3 and 6 as damage to
the test instrument may result.
(5) With the power applied, test between pins
2 and 8. There should be continuity. Next, test be-
tween pins 2 and pins 4, and 5. There should be no
(6) Continue the test with the power applied
and test between pins 7 and 1. There should be con-
tinuity. Now, test between pin 7 and pins 5,4, and 8.
There should be no continuity.
(7) Replace a relay that fails to pass any of the
When installing relays, push straight in. Do not
twist as pins will be damaged.
(1) Install relays.
(2) Secure relays in socket with lockwashers
4-43. Outlet Receptacle (J1). (Model
a. Removal. Refer to figure 4-29 and the follow-
ing instructions to remove the outlet receptacle.
(1) Remove screws and lockwashers securing
the receptacle cover to the control box.
(2) Remove receptacle cover and gasket.
(3) Remove screws and lockwashers securing
the duplex receptacle.
(4) Slide receptacle forward. Tag and discon-
nect electrical leads and remove the receptacle.