STERO SD1 LOW TEMP DISHWASHER |
9
INSTALLATION
(continued)
Figure 9
CYCLE TIMER ADJUSTMENT
The cycle timer, which regulates the dishwasher cycle, may require adjustment in order to suit local conditions.
To gain access to the cycle timer, loosen the bottom screw on the access cover located on the right side of the
control box and rotate the access cover up (Figure 9).
The cycle timer (Figure 9) makes one complete revolution (one dishwasher cycle) in 90 seconds. It consists of
seven cams, four of which can be adjusted. These cams actuate switches which control various machine func-
tions. A degree marker is located at the right end of the timer and corresponding notches on each cam are
marked off in five degree increments. Every four degrees of rotation equals one second.
A description of the seven timer cams, from left to right, and each cam’s function follows:
1. The
Cycle/Reset
cam, which is not adjustable, controls power to the timer motor and is activated by the
door cycle switch.
2. The
Wash/Start
cam, which is not adjustable, controls power to the wash pump motor.
3. The
Drain
cam, which is not adjustable, controls power to the drain valve. This cam is factory-set to open
the drain at 42.5 seconds into the cycle and keep it open until 52.5 seconds into the cycle.
4. The
Fill/Flush
cam controls power to the fill valve. During the last three seconds of drain time, the fill valve
opens to provide a fresh water flush of the wash chamber. This flush time may be increased or decreased,
as required by local operating conditions, by rotating the right half of the cam. This cam is factory-set
to open the fill valve to fill the wash chamber at 49.5 seconds into the cycle and keep it open until 58.5
seconds into the cycle. At 20 psig flowing pressure, the required quantity of water, 1.7 gallons, is allowed
to flow into the dishwasher. If flowing pressure is different than 20 psig (or if drain flush time has been
changed), the fill time will need to be increased or decreased to allow the dishwasher to operate with a
minimum of 1.7 gallons of water.
5. The
Detergent
cam controls power to the detergent delivery pump. This cam is factory-set to turn the
pump on at 1 second into the cycle and turn it off at 6.5 seconds into the cycle. This time may be increased
or decreased to accommodate the type and concentration of detergent.
6. The
Sanitizer
cam controls power to the sanitizer delivery pump. This cam is factory-set to turn the pump
on at 57 seconds into the cycle and turn it off at 60 seconds into the cycle. This time may be increased or
decreased to accommodate the type and concentration of sanitizer.
7. The
Rinse Aid
cam controls power to the rinse aid delivery pump. This cam is factory-set to turn the pump
on at 56 seconds into the cycle and turn it off at 59 seconds into the cycle. This time may be increased or
decreased to accommodate the type and concentration of rinse aid.
Start and stop time of each function is controlled by the size of the gap between the right and left halves of its
cam and the degree of rotation at which the gap occurs. If an adjustment is required, use the supplied timer
adjusting wrench (Figure 10) (shipped inside the control box). Rotate the left side of each cam to open the
gap (increase “on” time) or close the gap (decrease “on” time).
Figure 10
TIMER ADJUSTING WRENCH
ACCESS COVER
CYCLE TIMER
LOOSEN SCREW
