©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specifications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone (336) 629-4651
MNL-ASTCU14000 6
Big Dipper
®
AST System
Suggested Settings/Timer Operation
7
3
2
1
4
5
AM
7
8
9
10
11
12
1
2
3
4
5
PM
8
9
10
11
12
12
6
7
9
3
TO SET TIMER:
1. Push on/off tabs on the outer ring
of timer inward into dial at desired
“ON” times. 1 Tab = 15 minutes.
Minimum of one (1) tab (15 min-
utes) not to exceed 2 hours in a
complete run cycle.
2.Turn dial CLOCKWISE
one or more complete revolutions
until the present time is aligned
with the time-of-day indicator
point.
3. Fill the unit with water by turning
on the sink water taps, then plug
the Big Dipper unit into grounded
electrical outlet.
4. Tabs pushed IN = ON
Tabs pushed OUT = OFF
Big Dipper
®
AST System Suggested Settings/Timer Operation
Time-of-day
indicator point
Tabs punched in
indicate “ON”setting
Tabs NOT
punched
in indicate
“OFF”setting
NOTE: IN CASE OF POWER FAILURE, RESET TIMER. (See Step 2 above).
After the plumbing installation is complete, the Big Dipper unit needs to be set for the proper
automatic self-cleaning operation for the facility. The Big Dipper W-750-AST model is equipped
with one (1) 24 Hour/96 Event time controller while the W-1250-AST model is equipped with two
(2) time controllers. The time controller is located under the lid of the motor housing mounted
on top of the Big Dipper lid (See Pages labeled “Electrical Connection Detail” sketches of this
location).
Depending upon the amount of accumulated grease and oils, the system may need to be reset
to operate more or less time to skim all separated grease and oils. This can be determined by
removing the top cover and observing the depth of the separated grease layer shortly after a
cleaning cycle is completed. This layer should not be more than 1/2” (12 mm) thick. If this layer is
consistently thicker, increase the operating times of the Big Dipper AST System by 30 minutes for
each additional 1” (25 mm) of grease not to exceed 2 hours in a complete run cycle. If required,
additional run cycles can be added throughout the day. Consequently, if there is any quantity of
water in the grease collector, then the Big Dipper is operating too long. Decrease the amount of
operating time by one tab (15 min.) at a time until no water is collected in the container.
Dial rotates
Clockwise
