Operation
3A6319E
15
Operation
Pump Operation
The G3 pump can be controlled using an external, user
supplied, power source and controller.
Refer to
, page 8 for correct loca
-
tion of the required fuses.
NOTE:
• When using an external power source and control
-
ler, Pump ON (Run) Time should be set for no lon
-
ger than 30 minutes.
• In most cases, Pump OFF (Rest) Time should be
twice as long as Pump ON (Run) time. If alternative
ON / OFF times are required, contact Graco Cus
-
tomer Service for assistance.
Low Level Output Option
Some G3 pumps without controllers include a Low
Level Output Option. The low level signal is monitored
across PINS 3 and 4. For PIN 3 and 4 locations and wir
-
ing information see the
NOTE:
A low level warning is triggered when the con
-
troller detects PINS 3 and 4 have momentarily closed.
When the grease level has reached a low warning level,
PINS 3 and 4 momentarily close (one (1) time per pad
-
dle revolution) sending the signal that the fluid has
reached a low level to the controller.
To ensure that a low level condition has been met, three
(3) or more low level triggers must be detected within
one (1) minute or less.
See F
. 13 for an illustration of a typical Low Level Out
-
put response to low grease level.
Typical Low Level Output Response with Low Level Fluids
F
IG
. 13
Closed
Open
200 ms
3 s
Contact
Position
