Cornelius R-404A REFRIGERANT service manual Placing Unit in Operating Location

PLACING UNIT IN OPERATING LOCATION

IMPORTANT NOTICE

The FCB Dispensers manufactured prior to the models documented in this manual were elevated in the front (dispensing valve side) 1/4 to 3/8-inch higher than the back when placing the Unit in operating position to eliminate gas pockets being trapped inside the freeze cylinders. Due to a redesign of the foam pack in the models documented in this manual, elevating the front of the Dispenser is no longer required. The Dispenser must be leveled at time of placing in operating location.

1. Disconnect electrical power from Unit at the electrical power source disconnect switch.

IMPORTANT: When installing Unit in it’s operating position, do not allow obstructions to block sides, top, and front of the Unit which will block off cooling air intake to the inside of the Unit. Air flow through the Unit must be present to provide adequate cooling for the refrigeration system. Refer to SELECTING LOCATION for sides, top, and front clearances to be observed when placing Unit in operating position.

2.Referring to the preceding NOTE, very carefully, place the Unit in operating location.

3.Make sure the Unit is sitting level. The Unit may be leveled by using a carpenter’s level and adjusting the four leveling legs installed on the Unit during installation.

4.Restore Unit to operation by connecting electrical power at the electrical power source disconnect switch.

ADJUSTING BEATER MOTOR CURRENT (EITHER SIDE)

Adjusting beater motor current (either side) procedure is very important and must be performed as instructed. Be sure you fully understand the instructions before performing the current adjustments or doing any preventative maintenance current readings check.

Any current adjustments or preventative maintenance current readings check on the beater motor current (either side) must be performed with both freeze cylinders fully defrosted. A partially defrosted freeze cylinder will cause false current readings to be displayed on the message display. Adjust beater motor current (either side) as follows:

1.Using a flat blade screwdriver, turn lock counterclockwise to unlock the front access door (see Figure 5), then open the door.

2.Remove four screws securing the upper electrical control box cover (control box located on back of the front access door). Remove cover for access to the master circuit board (see Figure 4).

3.Place No. 4 ‘‘BEATER MOTOR CURRENT READOUT’’ switch on DIP SWITCH assembly on master circuit board (see Figure 4) in ‘‘ON’’ position. Both freeze cylinders beater motors will operate and beaters motors current ratings will be displayed on message display.

4.Display should be adjusted to read A150 B150 ± 2 by adjusting MOTOR CURRENT ADJUSTMENTS lo- cated on No. 1 and No. 2 relay circuit boards (see Figure 4). These figures will fluctuate slightly with varia- tions in line voltage and motor loads.

5.After completion of adjusting beater motor current to A150 B150 ± 2, make sure No. 5 ‘‘MOTOR CURRENT SELF-CALIBRATION’’ switch on DIP SWITCH assembly on master circuit board (see Figure 4) is in ‘‘OFF’’ position. No. 5 switch in ‘‘OFF’’ position allows the ‘‘MOTOR CURRENT’’ SELF-CALIBRATION’’ electronics to automatically self-calibrate the beaters motors currents at completion of each defrost cycle.

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