Mueller SENTRY II Installation And Operation Manual

SENTRY II

WITH AUTO-DOSING ASSEMBLY

INSTALLATION AND OPERATION

MANUAL

PART NO. 8823644

EFFECTIVE 4/1/00

®

THE MILK COOLING SYSTEMS SPECIALISTS

TM

®

®

Table of Contents

SENTRY

®

II WITH AUTO-DOSING ASSEMBLY

INSTALLATION AND OPERATION MANUAL

Section 1.0 - Introduction Page

1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.2 Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.3 Regulatory Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Figure 1 - Sentry II Control Cabinet and Milk Cooler Components . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Section 2.0 - Installation

2.1 Crate Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.2 Skid Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Figure 2—Skid Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.3 Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.4 Hot Water Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.5 Water Supply Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.6 Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.7 Foundation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Formula 1—Gross Weight of Milk Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Figure 3—Foundation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.8 Leveling the Milk Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Figure 4—Leveling the Milk Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

2.9 Bulk Head Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Figure 5—Agitator Weather Shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Figure 6—Basic Bulk Head Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2.10 Milk Room Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Figure 7—Milk Room Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

2.11 Agitator Assembly Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Figure 8—Agitator Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

2.12 Pump Assembly and Electric Drain Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Figure 9—Pump Assembly and Electric Drain Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2.13 Instructions for Mounting the Sentry II Control Box Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

2.14 Water Line Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Figure 10—Sentry II Control Box Installation and Water Connections . . . . . . . . . . . . . . . . . . . . . . . .11

2.15 Chemical Line Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2.16 Manway Wash Tube Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Figure 11—Manway Wash Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

2.17 Spray Dish Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Figure 12—Spray Dish Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Figure 13—Spray Dish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

2.18 Milk Cooler Vent Assembly Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Figure 14—Milk Cooler Vent Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Section 3.0 - Electrical Wiring

3.1 Field Electrical Connections at Milk Cooler’s Rear Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Figure 15—Milk Cooler Electrical Terminal Strip (Rear Junction Box) . . . . . . . . . . . . . . . . . . . . . . . . .16

Part No. 8823644

Section 3.0 - Electrical Wiring -

Continued

Figure 16—Electrical Schematic - Wash Pump Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Figure 17—Electrical Schematic - Agitator Motor(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Figure 18—Electrical Schematic - Rear Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Figure 19—Internal Conduit Raceways - Milk Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Figure 20—Electrical Schematic - Field Wiring (enlarged schematic in back of manual) . . . . . . . . . . .19

Figure 21—Electrical Schematic - Factory Wiring (enlarged schematic in back of manual) . . . . . . . . .20

Figure 22—Sentry II Relay and Switch Contact Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

3.2 PLC Electrical Troubleshooting (Input and Output Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Table 1—PLC Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Figure 23—Electrical Schematic - PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Figure 24—Electrical Schematic - Peristaltic Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Section 4.0 - Sentry II Temperature Control

4.1 Sentry II Temperature Control and Thermocouple Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

4.2 Sentry II Thermocouple Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Figure 25—Sentry II Thermocouple Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

4.3 Sentry II Thermocouple Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Figure 26—Sentry II Thermocouple Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

4.4 Important Thermocouple Splicing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Figure 27—Sentry II Thermocouple - Temperature Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . .27

4.5 Sentry II Temperature Control Calibration Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

4.6 Sentry II Temperature Control Lock and Unlock Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Figure 28—Sentry II Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

4.7 Sentry II Temperature Control Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

4.8 Sentry II Temperature Control Set Point Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

4.9 Sentry II Temperature Control Unit of Measure (Fahrenheit or Celsius) . . . . . . . . . . . . . . . . . . . . . . .30

Section 5.0 - Automatic Chemical Dosing

5.1 Initial Start-Up Procedures for Automatic Dosing and Chemical Usage . . . . . . . . . . . . . . . . . . . . . . . .31

5.2 Peristaltic Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

5.3 Chemical Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

5.4 Peristaltic Pump Priming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Figure 29—Peristaltic Pump Priming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

5.5 Adjusting Peristaltic Pump Timers for Proper Chemical Concentration . . . . . . . . . . . . . . . . . . . . . . . .33

Figure 30—Peristaltic Pump Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Table 2—Timer Selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Table 3A—Peristaltic Pump Timing for Specific Chemical Concentrations (2-240 Seconds) . . . . . . . . .34

Table 3B—Peristaltic Pump Timing for Specific Chemical Concentrations (240-478 Seconds) . . . . . . .35

Table 3C—Peristaltic Pump Timing for Specific Chemical Concentrations (478-726 Seconds) . . . . . . .36

5.6 Determining Water Usage Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Figure 31—PLC Fill-Time Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Table 4—Minimum Water Requirements (Per Cycle) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

5.7 Determining Actual Water Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Table 5—Calculated Water Usage (Fill-Time/Supply Pressure) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

5.8 Wash Cycle Timing Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Chart 1—Detergent Wash or Complete Wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Chart 2—Acid Cycle or Sanitize Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Table of Contents -

Continued

Section 6.0 - Sentry II PLC Programming

6.1 Sentry II Programmable Features, Options, and Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . .41

6.2 Sentry II - MTA to PLC Programming Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

6.3 Sentry II Service Reference Form, Programmable Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Section 7.0 - Operating Instructions

7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Figure 32—Sentry II Operating Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

7.2 “Cool-Off-Wash” Rotary-Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

7.3 Cooling Bottoms Units Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

7.4 Cooling All Units Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

7.5 Pre-Start Cooling Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

7.6 Pre-Start Agitator Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

7.7 Detergent Cycle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

7.8 Acid Cycle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

7.9 Sanitize Cycle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

7.10 Agitate Sample Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

7.11 Alarm Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

7.12 Milk Temperature Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

7.13 Cooling Override Switch (Emergency Use Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Section 8.0 - Weights and Dimensions

8.1 English Weights and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

8.2 Metric Weights and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Section 9.0 - Sentry II Replacement Parts

9.1 Sentry II Replacement Parts Drawing, Main Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

9.2 Sentry II Replacement Parts List, Main Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

9.3 Sentry II Replacement Parts Kit, Dosing and Manifold Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

9.4 Sentry II Replacement Parts List, Dosing and Manifold Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

9.5 Sentry II Replacement Parts Kit, Pump Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

9.6 Sentry II Replacement Parts List, Pump Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Section 10.0 - Sentry II Equipment Markings

10.1 Label No. 8822229, Lock Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

10.2 Label No. 8820482, Caution - Disconnect Power and Retain Latch . . . . . . . . . . . . . . . . . . . . . . . . . . .64

10.3 Label No. 8820623, Warning Symbol - Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

10.4 Label No. 8805616, Manual - Run Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

10.5 Label No. 8820248, Auto - Automatic Run Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

10.6 Label No. 8823064, Acid - Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

10.7 Label No. 8823063, Detergent - Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

10.8 Label No. 8823065, Sanitize - Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

10.9 Label No. 8822584, Pump Motor - Wire Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

10.10 Label No. 8802375, Agitator(s) - Wire Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

10.11 Label No. 3791, Hot - Water Valve Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

10.12 Label No. 8823609, Warning - Manifold Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

10.13 Label No. 8823013, Warning - Disconnect Power Before Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . .66

10.14 Label No. 8801150, Warning - Disconnect Power Before Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . .66

10.15 Label No. 8822225, CE Data Tag (U.K. Models Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

10.16 Label No. 8820410, Data Tag (U.K. Models Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

10.17 Label No. 30612, Notice - Chart Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

Table of Contents -

Continued

Table of Contents -

Continued

Section 10.0 - Sentry II Equipment Markings -

Continued

10.18 Label No. 8820454, Dry Nitrogen Holding Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

10.19 Label No. 8805299, Warning - HCFC Class II Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

10.20 Label No. 30737, Bottom Temp-Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

10.21 Label No. 8822972, Transformer Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

10.22 Label No. 8822705, Canadian and U.S. Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

10.23 Label No. 8822948, 24 VAC Component List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

10.24 Label No. 8820409, Mueller Name Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

10.25 Label No. 8822980, Programmable Controller Name Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

10.26 Label No. 8822558, Mueller Milk Cooler Data Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

10.27 Label No. 30890, Mueller Data Tag - Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

10.28 Label No. 8820677, Ground Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

10.29 Label No. 3792, Cold - Water Valve Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

10.30 Label No. 30397, Stainless Steel Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

10.31 Label No. 30166, Caution - Vent Must Be Over Milk Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

10.32 Label No. 8820508, Hot - Tube Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

10.33 Label No. 8802777, Caution - Do Not Sanitize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

10.34 Label No. 8823146, Terminal Block - 24 VAC - 240 VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

10.35 Label No. 8823263, Terminal Block - 24 VAC - 240 VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Section 11.0 - Safety

11.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

11.2 Manway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

Section 12.0 - Disposal

12.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

12.2 Chemical Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

12.3 Solid Component Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

SECTION 1.O - INTRODUCTION

1.1 General

The Mueller®Sentry®II refrigeration and cleaning control with auto-dosing feature is custom designed
and manufactured to provide programmable and automated push-button timing of the cleaning,
cooling, and agitation cycles. A large digital temperature display and automatic temperature alarm
system informs the operator of safe milk temperatures.

Durable construction and enhanced control circuitry ensures maximum cooling and energy efficiencies,
superior automation, and long-term reliability.

1.2 Technical Support

This manual provides the basic installation and operating information to ensure safe and optimum
performance of the Sentry II control system. Please contact your local Mueller Sales and Service
Representative if you require additional technical assistance pertaining to installation or operating
procedures.

Manufacturer’s support is available by contacting:

Paul Mueller Company
Dairy Farm Equipment Service Department
P.O. Box 828
Springfield, Missouri 65801
Telephone: [phone] • 1-800-MUELLER (683-5537)

1.3 Regulatory Requirements

It is the responsibility of the purchaser and installer to seek the necessary regulatory pre-approval of
an installation, ensuring that the site and method of installation meets all regulations for the locality.

Local, state, and/or county regulations pertaining to the installation, operation, and service of the
equipment may vary and must be followed accordingly.

Installation and service must be performed by authorized service technicians who have the proper
training and certification to install and service refrigeration and electrical equipment.

Sentry II with Auto-Dosing Assembly Operating Instructions 1 Effective April 1, 2000

Figure 1 - Sentry II Control Cabinet and Milk Cooler Components

Sentry II with Auto-Dosing Assembly Operating Instructions 2 Effective April 1, 2000

A. Sentry II Control Box
B. Alarm Indicator
C. Detergent Switch/Indicator
D. Acid Switch/Indicator
E. Sanitize Switch/Indicator
F. Sample Agitation Switch/Indicator
G. Cool/Off/Wash Selector Switch
H. Digital Temperature Indicator
I. Cooling Switch/Indicator (Bottom Units)
J. Cooling Switch/Indicator (All Units)
K. Pre-Start Switch/Indicator (Cooling)
L. Pre-Start Switch/Indicator (Agitate)

M. Peristaltic Pump Priming Switch
N. Priming Selector Switch
O. Peristaltic Pump (Sanitize)
P. Peristaltic Pump (Acid)
Q. Peristaltic Pump (Detergent)
R. Chemical Line Priming Disconnect
S. Fill Line Disconnect
T. Pressure Switch (No Water Alarm)
U. Manifold Assembly
V. Water Solenoid Valve (Dual)
W. Electric Drain Valve
X. Wash Pump Assembly

SECTION 2.0 - INSTALLATION

2.1 Crate Removal

CAUTION: Equipment used to move or lift the milk cooler must be rated for the weight of the
milk cooler. Approximate weights are provided in Section 8.

1. Remove any open-type crating and the packaged parts. Do not remove the skids attached to the
milk cooler legs at this time.

2. Inspect the milk cooler and report any damage to the transportation carrier. File a claim
immediately if the milk cooler is damaged.

3. Move the milk cooler into the milk house and position it to meet all regulatory requirements for
the locality.

4. Once in place, the skids can be removed.

2.2 Skid Removal

1. Raise one end of the milk cooler with the floor jack placed beneath the skid’s cross brace. Securely
block the skid to ensure safety and stability while removing the self-tapping screws from the
bottom of each leg.

2. Lower the milk cooler and repeat the procedure on the opposite end.

3. Remove cross-bracing members, leaving the two skids under the milk cooler’s legs.

4. Raise one end of the milk cooler with a floor jack and wooden-cradle block. Pivot the skids away
from the milk cooler. Lower the milk cooler and repeat the procedure for the other end.

Figure 2 - Skid Removal

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Sentry II with Auto-Dosing Assembly Operating Instructions 3 Effective April 1, 2000

2.3 Site Requirements

It is the responsibility of the installer and/or purchaser to provide adequate electrical service, water
supply, floor drains, and footer foundations for the installation. Failure to do so can cause non­warranted structural damage to the milk cooler and/or costly service problems for the user.

2.4 Hot Water Requirements

A water heating device with adequate storage and temperature recovery capacity must be provided to
wash the milk cooler and milking equipment simultaneously. The water heater should be capable of
supplying water temperatures of 160-170°F (71-76.6°C) during the detergent wash cycle.

CAUTION: To prevent non-warranted expansion damage to the milk cooler, the maximum
wash water temperature shall not exceed 170°F (76.6°C). Installation sites that require water
temperatures in excess of 170°F (76.6°C) should install a tempering valve, Mueller Part No.
8820276, to regulate the milk cooler wash water temperature at 170°F (76.6°C) or below.

2.5 Water Supply Pressure

Water supply pressure to the milk coolers wash system must be maintained between 20 and 60 psig.

2.6 Electrical Requirements

The Sentry II Control System requires a 240/50-60/1 power supply, fused at 15 amps maximum. See
Section 3 for detailed wiring schematics.

NOTE: International markets may request optional transformer, Mueller Part No. 8823060, for power
supplies providing 195/50/1.

Electrical installation requirements for the refrigeration units should be obtained from the Installation
and Operation Manual specific to the refrigeration unit(s) being installed.

NOTE: All wiring to be performed in accordance with the National Electrical Code and/or regulatory
agency for the installation locality. All wiring that enters the Sentry II control box must be sealed with
cord grips or liquid-tight conduit connectors.

Sentry II with Auto-Dosing Assembly Operating Instructions 4 Effective April 1, 2000

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2.7 Foundation Requirements

IMPORTANT: Due to varying geographical soil conditions, contact a local civil engineer for footer,
concrete, and foundation requirements that will adequately support the weight of the milk cooler
when filled to maximum capacity.

The following information is required to determine the foundation requirements:

1. A drawing showing the layout location of the milk cooler’s legs. See Section 8.

2. A drawing describing the proposed installation layout.

3. Gross weight of the milk cooler when filled to maximum capacity.

Formula 1 - Gross Weight of Milk Cooler

Net Weight (lb)* + (Capacity in US Gallons x 8.6) = Gross Weight (lb)
Net Weight (kg)* + (Capacity in Liters x 1.0305) = Gross Weight (kg)

*Section 8 provides approximate net weights of Mueller milk coolers.

Example: 2,000 gallon Mueller milk cooler filled to maximum capacity.

2,356 lbs. + (2,000 x 8.6) = 19,556 lbs.
1,069 kg. + (7,570 x 1.0305) = 8,870 kg.

IMPORTANT NOTE: Mueller warrants to the original purchaser/user that the Mueller factory calibration
of a Mueller milk cooler will not be affected (i.e. exceed the tolerances prescribed by the National
Institute of Standards and Technology) by distortion or structural change for a period of five (5) years
from the date of installation or sixty-six (66) months from the date of shipment from the Company
factory, whichever occurs first. The Company’s obligation shall be limited to the correction of the
calibration only, and does not cover reimbursement of product loss. This warranty will not apply if
distortion is caused by changes in the floor or foundation on which the milk cooler is installed. Refer
to the Mueller Milk Cooler Warranty Card for complete warranty information.

Figure 3 - Foundation Requirements

Sentry II with Auto-Dosing Assembly Operating Instructions 5 Effective April 1, 2000

2.8 Leveling the Milk Cooler

With the assistance of a floor jack and protective wooden-cradle block, level the milk cooler as
described in the following steps:

1. Adjust the inner legs off the floor until the proper pitch is obtained with the four corner legs.

2. Place a carpenter’s level across the brim of the manway opening and level the milk cooler by
adjusting the corner legs with a nylon strap wrench. Legs may be extended by turning the legs
counterclockwise, and retracted by turning the legs clockwise.

3. Using the levels located on the side of the cooler, adjust each end of the milk cooler until the
proper height and pitch is obtained. (The milk cooler should pitch 1/4" per foot towards the outlet
valve.)

4. Using a certified seraphin, add the exact volume of water indicated for the “Set-Up Reading” on
the calibration chart.

5. Adjust the final pitch of the milk cooler, matching the calibration gauge reading with the “Set-Up
Reading” on the calibration chart.

6. When the front and back corner legs are positioned properly, the inner legs should be extended
firmly against the floor.

7. Ensure that the final location and position complies with all regulations for the installation locality,
including the proper height of the milk outlet and the proper dimensions beneath and around the
milk cooler.

Figure 4 - Leveling the Milk Cooler

Sentry II with Auto-Dosing Assembly Operating Instructions 6 Effective April 1, 2000

2.9 Bulk Head Installations

If the milk cooler is bulkheaded through a wall, the wall must be free-standing and not load bearing
against the milk cooler. Mueller offers an optional steel-formed structural support channel that may be
installed in masonry walls to prevent the wall from bearing load on the milk cooler. Contact Mueller’s
Sales Department for availability and pricing.

A weather shield kit, Part No. 93750, is required for agitator(s) that are located exterior of the milk
house wall. See Figures 5 and 8, and Section 2.11 for additional installation instructions.

Figure 5 - Agitator Weather Shield

Figure 6 - Basic Bulk Head Installation

Sentry II with Auto-Dosing Assembly Operating Instructions 7 Effective April 1, 2000

2.10 Milk Room Installations

Ensure proper clearances between the milk cooler and other obstacles or equipment as required by the
regulations in your locality. Special attention should be placed on floor drain locations, high-traffic and
working areas, and ease of access for the operators.

The milk cooler parts box includes two stainless steel brackets to secure the water/chemical fill line to
the rear head of the milk cooler, Part Nos. 8823254 (top) and 8823253 (bottom). Each bracket is
supplied with 1.125" rubber grommets, which provides a method to support the water/chemical fill
hose inside of .75" PVC conduit. See Figure 7.

Figure 7 - Milk Room Installations

Sentry II with Auto-Dosing Assembly Operating Instructions 8 Effective April 1, 2000

2.11 Agitator Assembly Installation

1. Remove the protective plastic shipping wrap and position the agitator shaft (Item 7) up through
the opening in the top of the milk cooler. Slip the neoprene shield (Item 8) over the end of the
agitator shaft. Be careful not to damage the internal and external finishes of the cooler during this
procedure.

2. Position the spacer sleeves (Item 3) on the studs located on the top of the cooler. Apply Never­Seez®to the shaft end (Item 7) and threads of the cap screws (Item 1). Slip the agitator shaft
through the agitator drive and secure in place with cap screws (Item 1), lock washers (Item 2), and
spacer sleeves (Item 3).

3. Align the hole in the agitator shaft with the hole in the output shaft of the agitator drive and insert
the roll-pin (Item 5).

4. Place the blue plastic cap (Item 6) over the top of the output shaft after assembly.

5. Thread the 90° liquid-tight conduit fitting (Item 10) through the plastic nut (Item 11) with the flat­washer flange facing the motor. Slip the cut gasket (Item 12) over the threads and thread the
assembly into the agitator motor. Insert the 3-wire cable through the straight conduit fitting,
conduit, and 90° fitting installed in the motor. Thread the straight liquid-tight conduit fitting into
the full coupling attached to the milk cooler. Connect L1 and L2 as shown in the wiring schematic,
secure the ground wire under the grounding screw in the motor housing. Ensure clockwise
rotation as viewed from the top of the drive.

6. The optional agitator weather shield (Item 13) must be installed on all agitators that are located
exterior of the milk room.

Figure 8 - Agitator Installation

Sentry II with Auto-Dosing Assembly Operating Instructions 9 Effective April 1, 2000

2.12 Pump Assembly and Electric Drain Installation

1. Bolt the pump assembly and electric motor to the left front corner of the milk cooler as shown in

Figure 9.

2. Trim the rubber elbow (Item 1) for proper fit and connect between the discharge fitting on the

pump assembly and the wash line in the milk cooler.

3. Install the straight, liquid-tight conduit fitting (Item 2) in the stainless steel cover plate located on

the left side of the milk cooler.

4. Thread the 3-wire cord (marked pump motor) through the conduit fitting and conduit (Item 3).

5. Thread the plastic nut (Item 4) with the flat flange facing the motor onto the 90° liquid-tight fitting

(Item 5).

6. Slip the neoprene gasket (Item 6) over the threads of the 90° liquid-tight fitting and thread the

assembly into the pump motor.

7. Thread the 3-wire cord and conduit into the 90° liquid-tight fitting and secure with the liquid-tight

compression fitting.

8. Wire the motor per the electrical schematic attached to the motor.

9. Install the stainless steel screen (Item 7) in the rubber adapter (Item 8) and clamp the electric drain

valve in position with the two stainless steel hose clamps.

10. Install the cord grip (Item 9) in the stainless steel cover plate located on the left side of the milk

cooler.

11. Thread the cord (marked drain valve) through the cord grip and wire to terminal numbers 1 and 2

at the 24-vac electric drain valve coil.

12. Reattach the stainless steel cover plate and tighten all cord grips and liquid-tight conduit fittings.

Figure 9 - Pump Assembly and Electric Drain Installation

Sentry II with Auto-Dosing Assembly Operating Instructions 10 Effective April 1, 2000

2.13 Instructions for Mounting the Sentry II Control Box Enclosures

1. Install the Sentry II control box in a location where it is easily accessible for the operator and
protected from excessive wash down.

2. Install the peristaltic pump box and manifold box in an area protected from freezing and within
easy access to the chemical storage drums.

NOTE: The maximum length for the chemical supply hose is 28 feet (8 meters).

2.14 Water Line Connections

1. Connect the hot and cold water fill hoses to the water solenoid valves located in the right side of
the manifold box. See Figure 10.

2. Some localities may require the installation of high hazard back-flow preventors in the water
supply plumbing if the installation is connected to chemical supply drums larger than 1 gallon.
Contact your local regulatory agencies for proper direction and compliance.

Figure 10 - Sentry II Control Box Installation and Water Connections

Sentry II with Auto-Dosing Assembly Operating Instructions 11 Effective April 1, 2000

2.15 Chemical Line Connections

1. Locate the chemical supply drums in an area protected from freezing, direct sunlight, and
unauthorized access.

2. Connect the chemical supply hoses between the chemical drums, peristaltic pumps, and manifold
box as follows:

a. Insert the clear-colored chemical supply hose to the bottom of the detergent drum. Route and

connect the opposite end to the inlet of the peristaltic pump marked detergent.

b. Connect a second piece of clear-colored chemical supply hose to the outlet of the detergent

pump. Route and connect the opposite end to the quick-disconnect and check valve located
on the bottom of the manifold box.

c. Repeat the procedure for the acid and sanitize connections, connecting the red hose to acid

and the blue hose to sanitize. See Figure 10.

NOTE: The maximum total length of the chemical supply hoses must not exceed 28 feet (8 meters).

CAUTION: Wear protective clothing and eye protection when handling caustic chemicals!
Always observe the chemical manufacturer’s precautions, warnings, and usage
recommendations! Store all chemicals in a location protected from freezing, unauthorized
access, and direct sunlight.

Sentry II with Auto-Dosing Assembly Operating Instructions 12 Effective April 1, 2000

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CAUTION

WEAR EYE PROTECTION,

RUBBER GLOVES, AND

APRONS WHEN HANDLING

CHEMICALS

CORROSIVE

POISON

2.16 Manway Wash Tube Installation

The manway wash tube provides positive wash of the manway opening and cover. The tube is
inserted in the stainless steel nipple in the top of the milk cooler and held in place with a stainless
steel pin. Refer to the drawing in Figure 11 for detailed installation procedures.

Figure 11 - Manway Wash Tube

Sentry II with Auto-Dosing Assembly Operating Instructions 13 Effective April 1, 2000

2.17 Spray Dish Installation

The spray dishes connect to the internal or external CIP wash line with a stainless steel keeper pin.
Check for proper spray dish installation and orientation during the installation and start-up inspection.
The rectangular notch cut across the bottom of the spray dish tube must face the front and rear heads
of the milk cooler and the slot cut in the bottom of the dish must point towards the center of the
agitator shaft. See Figures 12 and 13.

Figure 12 - Spray Dish Orientation

Figure 13 - Spray Dish

Sentry II with Auto-Dosing Assembly Operating Instructions 14 Effective April 1, 2000

Rectangular notch must face front and
rear heads of the milk cooler.

Orient slot towards the center of the
agitator shaft.

2.18 Milk Cooler Vent Assembly Installation

Install the milk cooler vent assembly by rotating the vent assembly clockwise and allow the retaining
straps to engage in the retaining lugs. See Figure 14.

IMPORTANT: The vent for the milk cooler must be in place at all times. The vent prevents
contaminates from entering the milk cooler and provides proper air flow to prevent internal damage
resulting from vacuum or pressurization when the milk cooler is washed or emptied. Mueller Model
“O,” “OE,” “OH,” and “OHF” milk coolers are designed for operation at normal atmospheric pressure
only.

Figure 14 - Milk Cooler Vent Assembly

Sentry II with Auto-Dosing Assembly Operating Instructions 15 Effective April 1, 2000

VENT ASSEMBLY
MUST BE OVER MILK
INLET AT ALL TIMES!

EL ENSAMBLAJE
DE VENTEO DEBE
ESTAR SOBRE LA
ENTRADA DE LA
LECHE EN TODO
MOMENTO.

30166

CAUTION

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CUIDADO

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SECTION 3.0 - ELECTRICAL WIRING

3.1 Field Electrical Connections at Milk Cooler's Rear Junction Box

The rear junction box is factory equipped with a quick-connect terminal strip for simple field electrical
connections. See Figure 15.

Figure 15 - Milk Cooler Electrical Terminal Strip (Rear Junction Box)

To make electrical connections to the quick-connect terminal strip:

1. Disconnect all power supplies.

2. Strip .375-inches (10 mm) of insulation off each conductor.

3. Open the quick-connect terminal connection by inserting a 3-mm screwdriver into the bottom of
socket “A”.

4. Following the electrical schematics, insert the correct conductor into terminal connection “B” and
remove the screwdriver, allowing the quick-connect terminal to close on the conductor.

Sentry II with Auto-Dosing Assembly Operating Instructions 16 Effective April 1, 2000

Figure 16 - Electrical Schematic - Wash Pump Motor

Figure 17 - Electrical Schematic - Agitator Motor(s)

Figure 18 - Electrical Schematic - Rear Junction Box

Sentry II with Auto-Dosing Assembly Operating Instructions 17 Effective April 1, 2000

Figure 19 - Internal Conduit Raceways - Milk Cooler

Sentry II with Auto-Dosing Assembly Operating Instructions 18 Effective April 1, 2000

Figure 20 - Electrical Schematic - Field Wiring (Enlarged Schematic Attached in Back)

Sentry II with Auto-Dosing Assembly Operating Instructions 19 Effective April 1, 2000

Figure 21 - Electrical Schematic - Factory Wiring (Enlarged Schematic Attached in Back)

Sentry II with Auto-Dosing Assembly Operating Instructions 20 Effective April 1, 2000

Figure 22 - Sentry II Relay and Switch Contact Positions

Sentry II with Auto-Dosing Assembly Operating Instructions 21 Effective April 1, 2000

3.2 PLC Electrical Troubleshooting (Input and Output Data)

The LED lights on the top cover of the PLC provide a quick and simple visual aid for troubleshooting
the inputs and outputs. Compare the PLC input and output terminology from Table 1 with the
illuminated LED lights on the PLC for accurate troubleshooting of each individual circuit. Figure 23
provides an exploded view of the PLC electrical connections.

Table 1 - PLC Inputs and Outputs

Service Note: Inputs “X” are 24 VDC, outputs “Y0 - Y11” are 24 VAC, and “Y12 - Y15” are 240 VAC.

Sentry II with Auto-Dosing Assembly Operating Instructions 22 Effective April 1, 2000

Inputs Input Description Outputs Output Description

Not Used 24V 24 VDC (+) Output
L (Line) L1 of 240 VAC Supply OV 24 VDC (-) Output
Ground Electrical Ground COM0 (24VAC) Power for Y0, Y1, and COM1

N L2 of 240 VAC Supply Y0 (24VAC) Condensing Unit 1 (or) Hot Solenoid

S/S 24 VDC (-) Y1 (24VAC) Condensing Unit 2 (or) Cold Solenoid

Not Used Not Used

S/S 24 VDC (-) COM1 (24VAC) 24V Power for Y2-Y5 and COM2

X0 Agitator Sampling Switch Y2 (24VAC) Alarm Lamp
X1 Pre-Start Agitator Switch Y3 (24VAC) Agitator Lamp
X2 Pre-Start Cooling Switch Y4 (24VAC) Pre-Start Agitator Lamp
X3 Cooling Bottom Unit Switch Y5 (24VAC) Pre-Start Cooling Lamp
X4 Cooling All Units Switch Not Used
X5 Wash Cycle Start Switch COM2 (24VAC) 24V Power for Y6-Y11
X6 Acid Cycle Start Switch Y6 (24VAC) Cooling Bottom Unit Lamp (or) Drain Valve

X7 Sanitize Cycle Start Switch Y7 (24VAC) Cooling All Units Lamp (or) Detergent Wash
X10 Cooling Selector Switch Y10 (24VAC) Acid Cycle Lamp
X11 Wash Selector Switch Y11 (24VAC) Sanitize Cycle Lamp
X12 Temperature Control Set Point Not Used
X13 High/Low Temp. Alarm Input COM3 (240VAC) L1 of 240VAC/Power for Y12-Y15
X14 Not Used Y12 (240VAC) Agitator Coil (or) Wash Pump Coil
X15 Water Level Pressure Switch Y13 (240VAC) Detergent Chemical Pump
X16 Not Used Y14 (240VAC) Acid Chemical Pump

X17 Not Used Y15 (240VAC) Sanitize Chemical Pump

Figure 23 - Electrical Schematic - PLC

Sentry II with Auto-Dosing Assembly Operating Instructions 23 Effective April 1, 2000

Figure 24 - Electrical Schematic - Peristaltic Pumps

Sentry II with Auto-Dosing Assembly Operating Instructions 24 Effective April 1, 2000

SECTION 4.0 - SENTRY II TEMPERATURE CONTROL

4.1 Sentry II Temperature Control and Thermocouple Sensor

The Sentry II control uses an electronic temperature control with digital display and a Type “T”
thermocouple sensor. The following installation and calibration procedures are very important to
ensure accurate sensing of the milk temperature.

4.2 Sentry II Thermocouple Sensor Installation

Install the thermocouple sensor in the front-sensor raceway of the milk cooler as follows:

1. Fabricate an insertion rod from a 5-foot piece of 10-gauge solid wire by forming a 3/8" open loop
on one end. See Figure 25.

2. Align the flat side of the “T” shaped sensor with the inner shell of the milk cooler.

3. Slip the loop of the insertion rod over the thermocouple wire and push the sensor down the
raceway until it seats into the spring-clip at the end of the sensor raceway.

4. Being careful not to pull the thermocouple from the spring clip, withdraw the insertion rod from
the sensor raceway. See Figures 25 and 26.

Figure 25 - Sentry II Thermocouple Sensor Installation

Sentry II with Auto-Dosing Assembly Operating Instructions 25 Effective April 1, 2000

4.3 Sentry II Thermocouple Sensor Wiring

1. Route the thermocouple cable from the right-hand access opening through the internal conduit to
the left-hand access opening in the milk cooler.

2. Route the thermocouple cable from the left-hand access opening through the internal conduit to
the top-rear junction box of the milk cooler.

3. Mating copper (+) to copper (+) and constantan (-) to constantan (-), splice the thermocouple
cable to the thermocouple extension cable in the top-rear junction box of the milk cooler with
non-metallic wire nuts. See “Important Thermocouple Splicing Information” in Section 4.4.

4. Cut and insulate the foil shield and drain wire of the thermocouple extension cable at the top-rear
junction box. The drain wire should be grounded (one end only) at the Sentry II control cabinet.

5. Route the thermocouple extension cable from the rear junction box to the wall-mounted Sentry II.

Avoid routing this cable in conduit that contains high-voltage conductors.

6. Connect the copper (+) thermocouple conductor to Terminal No. 11 and the constantan/silver (-)

to Terminal No. 10 of the temperature control. Connect the drain wire to the electrical ground in
the Sentry II enclosure. See Figure 27.

Figure 26 - Sentry II Thermocouple Sensor Wiring

Sentry II with Auto-Dosing Assembly Operating Instructions 26 Effective April 1, 2000

4.4 Important Thermocouple Splicing Information

If it is necessary to splice the thermocouple cable, always mate copper to copper and constantan
(silver) to constantan (silver).

The thermocouple sensor must be wired continuously with Type “T” thermocouple cable. Do not use
ordinary copper wire.

Use non-metallic wire nuts, Mueller Part No. 8822361, to make all spliced thermocouple connections.

If thermocouple extension cable is required, Mueller Part No. 8820166, connect the drain wire to the
electrical ground at the Sentry II enclosure and cap and insulate the foil shield and drain wire at the
opposite end.

Figure 27 - Sentry II Thermocouple-Temperature Control Wiring

4.5 Sentry II Temperature Control Calibration Accuracy

Once the installation wiring is completed for the Sentry II control box, check the calibration accuracy
of the temperature control as outlined below:

1. Cover the bottom evaporator and agitator paddle with water or milk to check the temperature
calibration.

2. Allow the product temperature to stabilize for a minimum of 15 minutes.

3. Using an accurate electronic thermometer, determine the actual temperature of the water or milk in
the milk cooler.

4. If the known product temperature does not correspond with the temperature display, the
temperature control will require an input program correction. See Sections 4.6 and 4.7.

Sentry II with Auto-Dosing Assembly Operating Instructions 27 Effective April 1, 2000

4.6 Sentry II Temperature Control Lock and Unlock Features

The temperature control is equipped with a locking feature to prevent unauthorized adjustments to the
calibration, temperature set points, and unit of measure.

Unlock - To unlock the temperature control for adjustment, press and hold the and keys (see
Figure 28) simultaneously for two seconds. When released the display will blink once indicating a
successful unlock, otherwise repeat the process.

Lock - To lock the temperature control, press and hold the and keys simultaneously for 4
seconds. When released the display will blink once indicating a successful lock, otherwise repeat the
process. To validate a locked condition, press the key once, when released the display will
momentarily display “Lock.”

Note: The temperature control should be locked during normal operating conditions to prevent
unauthorized or accidental setting alterations.

Figure 28 - Sentry II Temperature Control

Sentry II with Auto-Dosing Assembly Operating Instructions 28 Effective April 1, 2000

Factory Temperature Control Settings:

Refrigeration On - 39°F (3.9°C)
Programmed Set Point - 38°F (3.3°C)
Refrigeration Off - 37°F (2.8°C)

Temperature Alarms:

High Alarm - 41°F (5.0°C)
Low Alarm - 35°F (1.7°C)

See Section 4.8.

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4.7 Sentry II Temperature Control Calibration

1. Unlock the temperature control as instructed in Section 4.6.

2. Press and hold the key until the display stops blinking, then release.

3. The display will show “SHIF” alternating with the current calibration setting.

NOTE: If display reverts to temperature, repeat step 2.

4. Press and release either the or key, the display will show 3 digits and 1 decimal (000.0).

5. Press and release either the or key to cycle to the decimal point or digit you wish to change.

The selected digit will be highlighted. Example (000.0)

6. Adjust the temperature calibration offset for the digit selected in step 5, by pressing and holding

the key to increase, or the key to decrease. Example: (001.0)

7. Note: For a negative calibration offset, select the first digit (X00.0) then press and hold the key
until “-” negative is displayed (-00.0). If “-100.0” is displayed, press the key until “-00.0” is
displayed. Example: (-01.0)

8. Press the key once to enter the change.

9. Press the key a second time to return to the temperature display.

10. Lock the temperature control by pressing and holding the and keys simultaneously for 4
seconds. When released the display will blink once indicating a successful lock, otherwise repeat
the process. To validate a locked condition, press the key once, when released the display will
momentarily display “Lock.”

EXAMPLE:

If the known product temperature was 37°F and the temperature control displayed 39°F, a correction
factor of -2°F would be required for calibration.

Starting at step 5 of the above instructions, you would perform the following procedure:

• Press and release the or key to cycle to the second digit (000.0)

• Press and hold the key until “2” (002.0) is displayed.

• Press and release either the or key to cycle to the first digit (002.0).

• Press and hold the key until “-” negative is displayed (-02.0).

• Press the key once to enter the change.

• Press the key a second time to return to the temperature display.

• Lock the temperature control by pressing and holding the and keys simultaneously for 4

seconds. When released the display will blink once indicating a successful lock, otherwise repeat
the process.

Sentry II with Auto-Dosing Assembly Operating Instructions 29 Effective April 1, 2000

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4.8 Sentry II Temperature Control Set Point Adjustment

The temperature control is factory programmed at 38°F (3.3°C) with a 1°F differential on rise and fall of
temperature. This setting turns the refrigeration off at 37°F (2.8°C) and on at 39°F (3.9°C).

The High and Low-Temperature Alarms are activated at 3°F above and 3°F below the programmed
temperature set point.

NOTE: The minimum and maximum set-point adjustments are regulated between 36-41°F (2.2-5.0°C).

1

Factory setting.

To change the factory settings:

1. Unlock the temperature control as instructed in Section 4.6.

2. Press either the or key once to display the current temperature set point.

3. Press and release either the or key to select the digit to be changed.

4. Adjust the temperature set point for the digit selected in step c, by pressing and holding the key
to increase, or the key to decrease.

5. Press and hold the key until the display stops blinking, then release to enter the change.

6. Press and release the key twice to return to the temperature display.

7. Lock the temperature control by pressing and holding the and keys simultaneously for 4
seconds. The display will blink once when the keys are released, informing you that the control
was successfully locked. See Section 4.6.

4.9 Sentry II Temperature Control Unit of Measure (Fahrenheit or Celsius)

1. Unlock the temperature control as instructed in Section 4.6.

2. Press and hold the key until the display stops flashing.

3. When the key is released “SHIF” will be displayed.

4. Press and release the key until “UNIT” is displayed.

5. Press and hold the to select °F or the key to select °C.

6. Press and hold the key until the display stops blinking, when released the temperature will
be displayed.

7. Lock the temperature control by pressing and holding the and keys simultaneously for 4
seconds. The display will blink once when the keys are released, informing you that the control
was successfully locked. See Section 4.6.

Sentry II with Auto-Dosing Assembly Operating Instructions 30 Effective April 1, 2000

Programmed Refrigeration Refrigeration High-Temp Low-Temp

Set Point ON OFF Alarm Alarm

36°F (2.2°C) 37°F (2.8°C) 35°F (1.7°C) 39°F (3.9°C) 33°F (0.6°C)
37°F (2.8°C) 38°F (3.3°C) 36°F (2.2°C) 40°F (4.4°C) 34°F (1.2°C)
38°F (3.3°C)

1

39°F (3.9°C)

1

37°F (2.8°C)

1

41°F (5.0°C)

1

35°F (1.7°C)

1

39°F (3.9°C) 40°F (4.4°C) 38°F (3.3°C) 42°F (5.5°C) 36°F (2.2°C)
40°F (4.4°C) 41°F (5.0°C) 39°F (3.9°C) 43°F (6.0°C) 37°F (2.8°C)
41°F (5.0°C) 42°F (5.5°C) 40°F (4.4°C) 44°F (6.6°C) 38°F (3.3°C)

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SECTION 5.0 - AUTOMATIC CHEMICAL DOSING

5.1 Initial Start-Up Procedures for Automatic Dosing and Chemical Usage

The chemical usage will vary depending on the make and manufacturer, the amount of water required
for each cycle, and the water quality. It is very important to have your Chemical Supplier test the water
supply and determine the proper usage and concentrations of each specific chemical. This information
should be posted on a cleaning chart near the milk cooler.

IMPORTANT NOTE: Improper chemical usage can cause non-warranted and non-repairable damage
to your stainless steel milk cooler. Chemicals should be purchased from a reputable source that
specializes in the proper application and usage of dairy cleansers for clean-in-place (CIP) applications.

5.2 Peristaltic Pumps

The peristaltic pumps are controlled by electronic timers and designed to deliver 2.6 milliliters (.0879
oz.) of liquid chemical per second of operation. See Section 5.5 and Tables 3A - 3C.

5.3 Chemical Cautions

• Proper safety precautions must be followed when handling chemicals.

• Read and abide by all Material Safety Data Sheets (MSDS), labels, instructions, warnings,

and health hazard information provided by the Chemical Manufacturer.

• Eye, face, and skin protection should be worn at all times!

• Prime peristaltic pumps in a glass jar only. Do not prime the pumps into the milk cooler.

• Without proper dilution, chemicals can damage the stainless steel milk cooler.

• Never mix chemicals—a deadly gas may be created.

• Ensure that all drains are properly trapped to prevent mixed chemical gasses from re-

entering the workplace.

• Store chemicals in an area protected from freezing and out of direct sunlight.

• Store chemicals in an area that prevents access by children or unauthorized individuals.

Sentry II with Auto-Dosing Assembly Operating Instructions 31 Effective April 1, 2000

WEAR EYE PROTECTION,

RUBBER GLOVES, AND

APRONS WHEN HANDLING

CHEMICALS

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CAUTION

WEAR EYE PROTECTION,

RUBBER GLOVES, AND

APRONS WHEN HANDLING

CHEMICALS

CORROSIVE

CAUTION

5.4 Peristaltic Pump Priming

The peristaltic chemical pumps will require priming upon the initial installation and each time the
chemical supply drums are emptied and replaced thereafter. The following procedure provides the
proper method of priming each pump:

1. While holding the female barbed fitting stationary, separate the in-line disconnect by pulling the
quick-connect down and turning it a 1/2turn counterclockwise.

2. Select the pump to be primed with the priming selector switch located on the top-left corner of
the chemical dosing box.

3. Hold a clean glass jar beneath the pump’s discharge line and press the momentary priming switch
located on the top-right corner of the chemical dosing box until a solid column of chemical is
discharged from the pump into the glass jar.

4. Reconnect the quick-connect fitting by inserting the male end into the female socket and turning

1

/2turn clockwise to lock it into position.

5. Safely dispose of the small amount of chemical in the glass jar.

6. Thoroughly wash all chemical traces from the glass jar and repeat the procedure for the remaining
peristaltic chemical pumps.

Figure 29 - Peristaltic Pump Priming

Sentry II with Auto-Dosing Assembly Operating Instructions 32 Effective April 1, 2000

5.5 Adjusting Peristaltic Pump Timers for Proper Chemical Concentration

1. Each peristaltic pump is connected to a timer that must be adjusted to provide the proper

concentration of each specific chemical. The peristaltic pumps are designed to deliver 2.6 milliliters
(.0879 oz.) of chemical per second.

IMPORTANT: The timers must be readjusted for the proper chemical concentration anytime the
type or manufacture of chemical is changed!

2. The timer has 10 switches that will select a predetermined operating time (seconds x 10) for each

peristaltic pump. Multiple switches may be selected for an additive run time to obtain the exact
concentration of chemical recommended by the Chemical Supplier. See Figure 30 and Table 2.

Figure 30 - Peristaltic Pump Timer Table 2 - Timer Selections

NOTE: Time is additive when multiple switches are selected in the on position. Multiply the seconds
labeled for each switch by 10.

EXAMPLE:

• Switch Number 8 and 9 on, all others off.

• Switch 8 (12.8 x 10 = 128 seconds) + Switch 9 (25.6 x 10 = 256 seconds).

• The peristaltic pump will operate for 384 seconds.

• Referencing the Table 3B, 384 seconds will deliver 998.4 ml (33.75 oz.).

SERVICE NOTE: Peristaltic pump hoses should be inspected on a regular basis. Replace every two
years or at any time they show signs of cracking or collapsing, or if they become non-pliable.

Using the Chemical Supplier’s concentration recommendations, select the required run time in seconds
for each of the cleaning chemicals from Tables 3A - 3C.

Sentry II with Auto-Dosing Assembly Operating Instructions 33 Effective April 1, 2000

Switch Number Seconds of Operation

10 51.2 x 10 = 512 sec.

9 25.6 x 10 = 256 sec.

8 12.8 x 10 = 128 sec.

7 6.4 x 10 = 64 sec.

6 3.2 x 10 = 32 sec.

5 1.6 x 10 = 16 sec.

4 0.8 x 10 = 8 sec.

3 0.4 x 10 = 4 sec.

2 0.2 x 10 = 2 sec.

1 0.1 x 10 = 1 sec.

Table 3A - Peristaltic Pump Timing for Specific Chemical Concentrations

(2 - 240 seconds)

Sentry II with Auto-Dosing Assembly Operating Instructions 34 Effective April 1, 2000

Table 3B - Peristaltic Pump Timing for Specific Chemical Concentrations

(240 - 478 seconds)

Sentry II with Auto-Dosing Assembly Operating Instructions 35 Effective April 1, 2000

Table 3C - Peristaltic Pump Timing for Specific Chemical Concentrations

(478 - 726 seconds)

Sentry II with Auto-Dosing Assembly Operating Instructions 36 Effective April 1, 2000

5.6 Determining Water Usage Requirements

The PLC in the Sentry II is supplied with a potentiometer that allows the volume of fill water to be
adjusted for each specific installation. As the timer is turned clockwise to increase the volume of wash
water, it automatically increases the electric drain time to ensure adequate drainage at the end of each
cycle. See Figure 31.

There are two factors that must be considered when determining the amount of water required during
the wash cycle:

a. The first requirement is to ensure there is sufficient water to prevent cavitation of the wash pump.

See Table 4 for minimum water requirements.

b. The second requirement is to ensure that there is sufficient water to maintain a minimum drain

temperature of 115°F (46°C) at the end of the hot-detergent wash cycle. The volume of water
required to satisfy the minimum drain temperature will vary depending on the surface area and
temperature of the milk cooler and the inlet supply water temperature. The installation technician
will need to adjust the fill water volume until the minimum drain temperature is achieved for the
hot-detergent cycle.

Figure 31 - PLC Fill-Time Potentiometer

Sentry II with Auto-Dosing Assembly Operating Instructions 37 Effective April 1, 2000

The fill-time potentiometer
increases or decreases the
amount of water admitted for
each cleaning cycle.

Turned to the far
counterclockwise position, the
fill-time is regulated at 3
minutes.

Turned to the far clockwise
position, the fill-time is
regulated at 15 minutes.

Time the actual fill cycle and
refer to Table 5 for calculated
water usage.

NOTE: The maximum
adjustment rotation for the
fill-time potentiometer is
less than one turn. Do not
force it beyond stops!

Table 4 - Minimum Water Requirements (Per Cycle)

5.7 Determining Actual Water Usage

To estimate the actual water usage:

1. Measure the customer’s water supply pressure.

2. Record the actual fill-time of the wash cycle after adjusting the fill-time potentiometer.

3. Refer to the calculated water usage provided in Table 5.

Table 5 - Calculated Water Usage (Fill-Time/Supply Pressure)

Sentry II with Auto-Dosing Assembly Operating Instructions 38 Effective April 1, 2000

Cooler Model Liters U.S. Gallons

400 - 1000 37.9 10.0

1,350 - 2,000 56.8 15.0

2,700 - 3,000 60.6 16.0

4,000 - 5,000 75.7 20.0

6,000 - 8,000 113.6 30.0

Measured Measured Water Supply Pressure (psig)

Fill-Time 15 psig 20 psig 30-50 psig 60 psig

(Minutes) Liters Gallons Liters Gallons Liters Gallons Liters Gallons

3.00 35.89 9.48 42.59 11.25 48.83 12.90 51.10 13.50

4.00 47.85 12.64 56.78 15.00 65.11 17.20 68.14 18.00

5.00 59.81 15.80 70.98 18.75 81.39 21.50 85.17 22.50

6.00 71.77 18.96 85.17 22.50 97.66 25.80 102.21 27.00

7.00 83.73 22.12 99.37 26.25 113.94 30.10 119.24 31.50

8.00 95.70 25.28 113.56 30.00 130.22 34.40 136.27 36.00

9.00 107.66 28.44 127.76 33.75 146.50 38.70 153.31 40.50

10.00 119.62 31.60 141.95 37.50 162.77 43.00 170.34 45.00

11.00 131.58 34.76 156.15 41.25 179.05 47.30 187.38 49.50

12.00 143.54 37.92 170.34 45.00 195.33 51.60 204.41 54.00

13.00 155.50 41.08 184.54 48.75 211.60 55.90 221.45 58.50

14.00 167.47 44.24 198.73 52.50 227.88 60.20 238.48 63.00

15.00 179.43 47.40 212.93 56.25 244.16 64.50 255.52 67.50

5.8 Wash Cycle Timing Sequence

The Sentry II provides several programming options for the wash cycles. See Section 6 for detailed
information.

Chart 1 - (Detergent Wash or Complete Wash)

NOTE: Fill and drain times are charted with the PLC potentiometer turned to the far counterclockwise
position. See Section 5.6 and Figure 31.

Sentry II with Auto-Dosing Assembly Operating Instructions 39 Effective April 1, 2000

Chart 2 - (Acid Cycle or Sanitize Cycle)

NOTE: Fill and drain times are charted with the PLC potentiometer turned to the far counterclockwise
position. See Section 5.6 and Figure 31.

Sentry II with Auto-Dosing Assembly Operating Instructions 40 Effective April 1, 2000

SECTION 6.0 - SENTRY II PLC PROGRAMMING

6.1 Sentry II Programmable Features, Options, and Recommendations

The Sentry II offers the following programming options, allowing the cooling and washing procedures
to be customized for each specific installation:

Note 1: Standard program only, not available with Japan program.
Note 2: Japan program is programmable for cold or warm sanitize cycle only. Acid cycle temperature is not adjustable.

Sentry II with Auto-Dosing Assembly Operating Instructions 41 Effective April 1, 2000

Programming Selectable Reference

Feature Description and Recommendations Options Section

Cooling Delay Allows the user to initiate a delayed start of the bottom refrigeration 0-120 min. Sec. 6.2

Bottom Unit(s) unit(s) at the onset of the first milking. (1-10)

Select a time delay that will delay the start of the bottom refrigeration
unit(s) until an adequate amount of milk has entered the cooler and made
contact with the agitator blade.

Cooling Delay Allows the user to initiate a delayed start of the side refrigeration unit(s) 0-120 min. Sec. 6.2

Side Unit(s) at the onset of the second, third, or fourth milking. (11-15)

Select a time delay that will delay the start of the side refrigeration unit(s) until
a sufficient amount of milk has entered the cooler to cover 1/3of the side
evaporator(s). NOTE: Time starts after bottom unit delay.

Pre-Start Allows the user to pre-start the agitator(s) and refrigeration 30 min. Sec. 6.2
Cooling unit(s) at the onset of the second, third, or fourth milking. Pre-Start or (16-20)

Cooling is disabled at 34°F (1.1°C) for freeze protection. 60 min.
Dependent upon fill rate into milk cooler.

Pre-Start Allows the user to pre-start the agitator(s) to blend incoming milk at the 30 min. Sec. 6.2

Agitate Only onset of the second, third, or fourth milking. or (21-25)

Dependent upon fill rate into milk cooler. 60 min.

Interval Allows the user to select an interval agitation time period to ensure proper On-3 min. Sec. 6.2

Agitation agitation of the milk. every 18 min. (26-30)

Timer or

Select 3 minutes every 30 minutes for 1,600 gallon and smaller milk coolers On-3 min.
and 3 minutes every 18 minutes for 2,000 gallon and larger milk coolers. every 30 min.

Sample Allows the user to select a time period that ensures adequate agitation for 2, 5, or 10 Sec. 6.2

Agitation proper milk sampling. min. (31-37)

Timer Select 5 minutes for 1,600 gallon and smaller milk coolers and 10 minutes

for 2,000 gallons and larger milk coolers.

Pre-Rinse Allows the user to select the fill water temperature for the Pre-Rinse Cycle. Cold Sec. 6.2

Fill or (38-42)

Temperature Follow your chemical supplier’s recommendations. Warm

Automatic Allows the user to select the option of an automatic Fifth-Cycle at the end On Sec. 6.2

Fifth-Cycle of a complete wash. or (43-47)

(See Note 1). Off (See Note 1).

Cycle Sequence: Pre-Rinse, Rinse, Wash, Post-Rinse, Selectable Fifth Cycle.
Normally programmed “On” for acid rinse. Follow your chemical supplier’s
recommendations.

Fifth-Cycle Allows the user to select Acid or Sanitizer for the chemical injection during the Acid Sec. 6.2

Acid or Fifth-Cycle. or (48-52)
Sanitize Normally programmed for Acid Rinse. Follow your chemical supplier’s Sanitizer (See Note 1).

(See Note 1). recommendations.

Fifth-Cycle Allows the user to select the fill water temperature for the Fifth-Cycle, Acid, Cold Sec. 6.2

Fill Temperature or Sanitize. or (53-57)

(See Note 2). Follow your chemical supplier’s recommendations. Warm (See Note 2).

Full Allows the user to select a 45-minute delayed start for the complete None Sec. 6.2

Wash Automatic Wash Cycle. or (58-62)

Delay Recommended for installations where the milk cooler and milking 45 min.

equipment are normally washed at the same time. The 45-minute delay
will allow adequate time for the water heating device to recover, and
generate sufficient hot water for washing the milk cooler.

6.2 Sentry II - MTA to PLC Programming Procedures

1. Open the hinged door on the PLC.

2. Energize the power supply to the Sentry II
Control before proceeding to Step 3.

3. Plug the MTA into the PLC.

CAUTION: Be careful not to touch any
terminals, power is applied!

4. The MTA will display:

■ SENTRY ➞ 1 ➞ 2

5. Press the key twice to select Sentry 2.

The MTA will display:

SENTRY ➞ 1 ■ 2

6. Press the ✚ key to enter the selection for
the Sentry II Model.

The MTA will display:

SENTRY II

Sentry II with Auto-Dosing Assembly Operating Instructions 42 Effective April 1, 2000

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PROGRAMMING NOTE:

If ➞ RETURN TO MENU is displayed at any
time, press the ✚ key to return to SENTRY II,
and use the ▼ to scroll back to the desired
programmable option.

7. Press the ▼ key to scroll to the first
programmable selection, “Bottom
Refrigeration Unit Time Delay.”

NOTE: If you scroll past a programming
selection, use the ▲ key to scroll back to the
desired selection.

The MTA will display:

➞ Cond Bottm Unit

8. Press the ✚ key to display the current time
delay setting—0-120 minutes.

The MTA will display:

xx Minute Delay

9. Press the ✚ key to increase or the key to
decrease the “Bottom Unit Time Delay.”

Sentry II with Auto-Dosing Assembly Operating Instructions 43 Effective April 1, 2000

10. Press the key to enter the selected
“Bottom Unit Time Delay.”

The MTA will display:

➞ RETURN TO MENU

11. Press the ✚ key to return to the main menu.

The MTA will display:

SENTRY II

12. Press the ▼ key, scrolling past the previous
programmable selection, to the next option,
“Side Unit(s) Delay.”

The MTA will display:

➞ Cond Side Units

13. Press the ✚ key to display the current time
delay setting—0-120 minutes.

The MTA will display the current time delay
selection:

xx Minute Delay

Sentry II with Auto-Dosing Assembly Operating Instructions 44 Effective April 1, 2000

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14. Press the ✚ key to increase or the key to
decrease the “Side Unit(s) Time Delay.”

15. Press the key to enter the selected “Side
Unit(s) Time Delay.”

The MTA will display:

➞ RETURN TO MENU

16. Press the ✚ key to return to the main menu.

The MTA will display:

SENTRY II

17. Press the ▼ key, scrolling past the previous
programmable selection, to the next option,
“Pre-Start Cooling.”

The MTA will display:

➞ Pre-Start Cool

Sentry II with Auto-Dosing Assembly Operating Instructions 45 Effective April 1, 2000

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18. Press the ✚ key to display the current
settings, 30 or 60 minutes.

19. Press the ✚ key to select 60 minutes or the
key to select 30 minutes.

20. Press the key to enter the selection.

21. Press the ✚ key to return to the main menu.

22. Press the ▼ key to scroll to the next option,
"Pre-Start Agitation.”

23. Press the ✚ key to display the current
settings—30 or 60 minutes.

24. Press the ✚ key to select 60 minutes or the
key to select 30 minutes.

25. Press the key to enter the selection.

26. Press the ✚ key to return to the main menu.

27. Press the ▼ key to scroll to the next option,
"Agitation Interval Timer.”

28. Press the ✚ key to display the current
settings—3 out of every 30 minutes or 3 out
of every 18 minutes.

Sentry II with Auto-Dosing Assembly Operating Instructions 46 Effective April 1, 2000

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29. Press the ✚ key to select 3 out of every 30
minutes or the key to select 3 out of every
18 minutes.

30. Press the key to enter the selection.

31. Press the ✚ key to return to the main menu.

32. Press the ▼ key to scroll to the next option,
"Sample Agitation Time.”

33. Press the ✚ key to display the current
setting—2, 5, or 10 minutes.

34. Press the ✚ key a second time to change the
current setting.

35. Press the ▲ or ▼ keys to select the desired
time—2, 5, or 10 minutes.

36. Press the ✚ key to enter the new setting.

37. Press the key to enter the selection.

38. Press the ✚ key to return to the main menu.

Sentry II with Auto-Dosing Assembly Operating Instructions 47 Effective April 1, 2000

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39. Press the ▼ key to scroll to the next option,
"Pre-Rinse Temperature.”

40. Press the ✚ key to display the current setting,
Cold or Warm.

41. Press the ✚ key to select Warm or the key
to select Cold.

42. Press the key to enter the selection.

43. Press the ✚ key to return to the main menu.

44. Press the ▼ key to scroll to the next option,
"Fifth Cycle On or Off.”

NOTE: This allows the Fifth-Cycle, Acid or
Sanitize, to be turned off for specific
International requirements.

Pre-Rinse, Rinse, Wash, Rinse, Fifth-Cycle—

On or Off

45. Press the ✚ key to display the current setting,
On or Off.

46. Press the ✚ key to turn the Fifth-Cycle On, or
the key to turn it Off.

47. Press the key to enter the selection.

48. Press the ✚ key to return to the main menu.

Sentry II with Auto-Dosing Assembly Operating Instructions 48 Effective April 1, 2000

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Japan Program:
Skip to Step 53.

49. Press the ▼ key to scroll to the next option,
"Fifth Cycle Acid or Sanitize.”

NOTE: This selects Acid or Sanitize
Chemicals for the automatic Fifth Cycle, if
selected in the previous programming step.

50. Press the ✚ key to display the current setting,
Sanitize or Acid.

51. Press the ✚ key to introduce Sanitizer, or the

key to introduce Acid chemicals in the

Fifth-Cycle.

52. Press the key to enter the selection.

53. Press the ✚ key to return to the main menu.

54. Press the ▼ key to scroll to the next option,
"Acid/Sanitize Cycle Fill Temperature.”

Japan Program: “Sanitize Temp.”

55. Press the ✚ key to display the current
settings, Cold or Warm.

56. Press the ✚ key to select Warm or the key
to select Cold.

57. Press the key to enter the selection.

58. Press the ✚ key to return to the main menu.

Sentry II with Auto-Dosing Assembly Operating Instructions 49 Effective April 1, 2000

▲▲

59. Press the ▼ key to scroll to the next option,
"Full Wash Delay.”

NOTE: This option allows the Full Automatic
Wash Cycle to be delayed for 45 minutes to
allow adequate recovery time of the water
heating device in specific installations.

60. Press the ✚ key to display the current setting,
no delay or 45 minute delay.

61. Press the ✚ key to select a 45 minute delay
or the key to select no delay.

62. Press the key to enter the selection.

63. Press the ✚ key to return to the main menu.

64. Press the ▼ key to scroll to the next option,
"Service Contact.”

65. Press the ✚ key to select “Paul Mueller
Company.”

66. Consecutively press the ▼ key, scrolling
through the "Service Contact” information
and telephone numbers until “Return to
Menu” is displayed.

67. Press the ✚ key to return to the main menu.

68. Programming is complete, unplug the MTA
from the PLC.

Note: De-energize the power supply to the Sentry II for 5

minutes after making any programming changes.

This will ensure that the changes are stored to the E.Prom of the PLC.

Sentry II with Auto-Dosing Assembly Operating Instructions 50 Effective April 1, 2000

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6.3 Sentry II Service Reference Form, Programmable Features

Please complete for future service reference:

Mueller Authorized Dealer: End User/Owner:

Name: Name:

Address: Address:

Phone: Phone:

Contact: Contact:

Please check the selected program options:

Description: Options and Selection

Bottom Unit(s) Cooling Delay 0-120 minutes ________ minutes

All Units Cooling Delay 0-120 minutes ________ minutes

Pre-Start Cooling ______ 30 minutes ______ 60 minutes

Pre-Start Agitation ______ 30 minutes ______ 60 minutes

Interval Agitation ______ 3 out of 18 min. ______ 3 out of 30 min.

Sample Agitation ______ 2 minutes ______ 5 minutes ______ 10 minutes

Pre-Rinse Temperature ______ Cold ______ Warm

Fifth-Cycle for Complete Wash ______ On ______ Off ______ n/a Japan Program

Fifth-Cycle (Acid or Sanitize) ______ Acid ______ Sanitize ______ n/a Japan Program

Acid/Sanitize Temperature* ______ Cold ______ Warm

Delayed Start - Complete Wash ______ None ______ 45 minutes

*Selects sanitize temperature only with Japan program.

Sentry Information: Milk Cooler Information:

Part Number/Model: Part Number/Model:

Serial Number: Serial Number:

Comments:

Sentry II with Auto-Dosing Assembly Operating Instructions 51 Effective April 1, 2000

SECTION 7.0 - OPERATING INSTRUCTIONS

7.1 General

The Sentry II control system is designed for easy, touch-of-a-button operation with simple visual
notification of each operational mode with bright, illuminated indicators.

Please locate the enclosed plastic laminated reference chart, Part No. 8823066, near the Sentry II
control. This will provide unfamiliar operators with a quick reference to the basic operation and
features of the Sentry II control system.

Figure 32 - Sentry II Operating Controls

7.2 “Cool-Off-Wash” Rotary-Selector Switch

Select “Cool” for cooling modes, “Off” for sample agitation or when the milk cooler is not in use, and
“Wash” for cleaning modes.

7.3 Cooling Bottom Units Switch

1. With the rotary selector switch in the “Cool” position, press the “Cooling Bottom Units” switch
once to initiate the time-delayed start of the bottom refrigeration unit(s). The lamp will flash until
the programmable time-delay expires. After the time delay expires, the lamp will remain on, and
the bottom refrigeration unit(s) will energize if the temperature control is calling for cooling. The
programmable time delay may be adjusted between 0-120 minutes. See Sections 6.1 and 6.2 (1-10).

2. Pressing the “Cooling Bottom Units” selector switch a second time will by-pass the programmable
time delay and immediately start the bottom refrigeration unit(s).

3. To cancel the bottom or all refrigeration unit(s), turn the “Cool-Off-Wash” rotary switch to the “Off”
position.

Sentry II with Auto-Dosing Assembly Operating Instructions 52 Effective April 1, 2000

7.4 Cooling All Units Switch

1. With the rotary selector switch in the “Cool” position, press the “Cooling All Units” switch once to
initiate the time-delayed start of the side refrigeration unit(s). The lamp will flash until the
programmable time-delay expires. The programmable time delay may be adjusted between 0-120
minutes. See Sections 6.1 and 6.2 (11-15).

NOTE: The time delay for “Cooling All Units” will not start timing until the “Cooling Bottom Units”
time delay expires.

2. After the “Cooling All Units” time delay expires, the lamp will remain on, and the side refrigeration
unit(s) will energize if the temperature control is calling for cooling.

3. Pressing the “Cooling All Units” selector switch a second time will by-pass the programmable time
delay and immediately start the bottom and side refrigeration units.

4. To cancel all refrigeration units, turn the “Cool-Off-Wash” rotary switch to the “Off” position.

7.5 Pre-Start Cooling Switch

1. With the rotary selector switch in the “Cool” position and “Cooling Bottom Units” and/or “Cooling
All Units” in the automatic cool position, press the “Pre-Start Cooling” switch once to initiate an
automatic override of the agitator(s) and refrigeration unit(s). The “Pre-Start Cooling” mode may be
programmed for 30 or 60 minutes. See Sections 6.1 and 6.2 (16-20).

2. After the programmed time period expires, the refrigeration unit(s) will return to the normal
cooling mode.

3. This feature will pre-cool and blend the milk to 34°F (1.1°C) at the onset of the second, third, or
fourth milkings.

4. To cancel “Pre-Start Cooling” press the switch a second time.

7.6 Pre-Start Agitator Switch

1. With the rotary selector switch in the “Cool”position and “Cooling Bottom Units” and/or “Cooling
All Units” in the automatic cool position, press the “Pre-Start Agitator” switch once to initiate
manual agitation for programmed period of 30 or 60 minutes. See Section 6.1 and 6.2 (21-25).

2. This feature blends the warm incoming milk at the onset of the second, third, or fourth milkings.

3. To cancel “Pre-Start Agitation” press the switch a second time.

Sentry II with Auto-Dosing Assembly Operating Instructions 53 Effective April 1, 2000

7.7 Detergent Cycle Switch

1. With the rotary selector switch in the “Wash” position, press the “Detergent Cycle” switch once to
start the automatic wash cycle.

2. The “Detergent Cycle” offers two programmable-cycle options:

• “Pre-Rinse—Rinse—Detergent—Post-Rinse” (Standard and Japan program)

• “Pre-Rinse—Rinse—Detergent—Post-Rinse—Acid/Sanitize” (Standard program only)
See Sections 5.8, 6.1, and 6.2 (43-57).

3. The Pre-Rinse and Acid/Sanitize Cycles may be programmed for warm or cold fill water
temperature. See Sections 5.8, 6.1, and 6.2 (38-57).

4. A programmable 45-minute delayed start is available to allow sufficient recovery time for the
water-heating device. See Sections 6.1 and 6.2 (58-62).

5. To cancel and reset the “Wash Cycle,” turn the “Cool-Off-Wash” rotary switch to the “Off” position.

7.8 Acid Cycle Switch

1. With the rotary selector switch in the “Wash” position, press the “Acid Cycle” switch once to start a
“Rinse—Acid” cycle. (Japan program starts a “Pre-Rinse—Hot Acid—Post-Rinse” cycle.) See Section

5.8, Chart 2.

2. To cancel and reset the “Acid Cycle,” turn the “Cool-Off-Wash” rotary switch to the “Off” position.

7.9 Sanitize Cycle Switch

1. With the rotary selector switch in the “Wash” position, press the “Sanitize Cycle” switch once to

start a “Sanitize” cycle. See Section 5.8, Chart 2.

2. To cancel and reset the “Sanitize Cycle,” turn the “Cool-Off-Wash” rotary switch to the “Off”

position.

7.10 Agitate Sample Switch

1. With the rotary selector switch on the “Off” position, press the “Agitate Sample” switch once to

start the agitator(s) for milk sampling. The agitator(s) will operate for the programmed period of 2,
5, or 10 minutes, and shut off automatically. See Sections 6.1 and 6.2 (31-37).

2. To cancel “Agitate Sample” press the switch a second time.

7.11 Alarm Lamp

1. The “Alarm Lamp” provides visual aid of the following alarm conditions:

a. Flashing at 11/2second intervals—The milk temperature is above a safe holding temperature.

b. Flashing at 1/2second intervals—The milk temperature is below a safe holding temperature

and near freezing. (Call a Mueller Authorized Service Technician.)

c. Constant illumination—Wash water did not enter the milk cooler within 2 minutes of a fill

cycle. (Call a Mueller Authorized Service Technician.)

2. To test the “Alarm Lamp,” turn the rotary selector switch to the “OFF” position and press the

“Detergent Cycle” switch.

Sentry II with Auto-Dosing Assembly Operating Instructions 54 Effective April 1, 2000

7.12 Milk Temperature Display

The milk temperature display provides a digital readout of the product temperature. To ensure
calibration accuracy and safe product holding temperatures, check and compare the actual product
temperature with an accurate secondary thermometer on a regular basis. See Sections 4.6 - 4.10.

7.13 Cooling Override Switch (Emergency Use Only)

1. The Sentry II has an emergency override switch located inside the enclosure. This will override the
temperature control and several other components and engage the bottom refrigeration unit(s) and
agitator(s) in an emergency situation.

2. To access and activate this switch, turn the power off to the Sentry II control box, open the door
and move this switch to the “Manual” position. Close the door, turn selector switch to the “Cool”
position, and reapply power.

IMPORTANT NOTE: There will be no automatic temperature control in the “Manual Over-Ride
Position.” When the product temperature is at a safe holding temperature, turn the power supply off to
the Sentry II control. (This is for emergency cooling only and an authorized Mueller Technician should
be contacted for immediate service.)

Sentry II with Auto-Dosing Assembly Operating Instructions 55 Effective April 1, 2000

SECTION 8.0 - WEIGHTS AND DIMENSIONS

8.1 English Weights and Dimensions

Dimensions not to be used for construction unless certified.

1

Actual calibration capacity may exceed certified capacity

2

Minimum and maximum clearance under the milk cooler with standard adjustable legs.

3

Approximate weight measured in pounds (includes agitator(s), pump assembly, and controls).

Sentry II with Auto-Dosing Assembly Operating Instructions 56 Effective April 1, 2000

Revised February 5, 2001

Capacity

1

ABCDE F GH2J No. of Weight

3

Model (gallons) (inches) (inches) (inches) (inches) (inches) (inches) (inches) (inches) (inches) Legs (Empty)

O-500 500 78 61 37.25 51 63.75 18 42 4-5 8.25 4 934

O-600 600 90 61 37.25 51.25 64 18 54 4-5 8.25 4 1,044

O-800S 800 80 71.25 50 60.75 73.5 18 44 4-8 8.25 4 1,284

O-1000S 1,000 102 71.25 50 61.25 74 18 33 4-8 8.25 6 1,530

O-1000D 1,000 102 71.25 50 61.25 74 18 33 4-8 8.25 6 1,576

O-1350 1,350 102 80 48.25 69.125 82 18 33 7-9 8.25 6 1,770

O-1600 1,600 120 80 48.25 69.5 82.25 18 42 7-9 8.25 6 1,988

O-2000 2,000 155 80 48.25 70.25 83 17.5 40 7-9 8.25 8 2,432

O-2700 2,700 155 90.5 48.25 70.25 83 17.5 40 7-9 8.25 8 3,220

O-3000 3,000 176 90.5 55 79.375 92.25 18 35 7-9 8.25 10 3,792

O-4000 4,000 196 97.625 58 86.25 99 18 32 7-9 8.25 12 5,982

O-5000 5,000 196 108 62 93.675 106.25 18 32 7-9 5.375 12 6,282

O-6000 6,000 196 119 72 99.375 112.25 12.25 24.5 7.9 5.375 16 6,792

O-7000 7,000 196 127 78 106.5 119.25 12.25 24.5 7-9 5.375 16 6,912

O-8000 8,000 228 126.3125 78 107.125 119.25 12 25.5 7-9 5.375 18 7,744

8.2 Metric Weights and Conversions

Dimensions not to be used for construction unless certified.

1

Actual calibration capacity may exceed certified capacity

2

Minimum and maximum clearance under the milk cooler with standard adjustable legs.

3

Approximate weight measured in kilograms (includes agitator(s), pump assembly, and controls).

Sentry II with Auto-Dosing Assembly Operating Instructions 57 Effective April 1, 2000

Capacity1ABCDE FGH2J No. of Weight

3

Model (liters) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) Legs (Empty)

O-500 1,893 1981.2 1549.4 946.2 1295.4 1619.3 457.2 1066.8 101-127 209.6 4 424

O-600 2,271 2286.0 1549.4 946.2 1301.8 1625.6 457.2 1371.6 101-127 209.6 4 474

O-800S 3,028 2032.0 1809.8 1270.0 1543.1 1866.9 457.2 1117.6 101-203 209.6 4 582

O-1000S 3,785 2590.8 1809.8 1270.0 1555.8 1879.6 457.2 838.2 101-203 209.6 6 694

O-1000D 3,785 2590.8 1809.8 1270.0 1555.8 1879.6 457.2 838.2 101-203 209.6 6 715

O-1350 5,110 2590.8 2032.0 1225.6 1755.8 2082.8 457.2 838.2 178-229 209.6 6 803

O-1600 6,057 3048.0 2032.0 1225.6 1765.3 2089.2 457.2 1066.8 178-229 209.6 6 902

O-2000 7,571 3937.0 2032.0 1225.6 1765.3 2108.2 444.5 1016.0 178-229 209.6 8 1,103

O-2700 10,221 3937.0 2298.7 1397.0 2006.6 2333.6 444.5 1016.0 178-229 209.6 8 1,461

O-3000 11,356 4470.4 2298.7 1397.0 2016.1 2343.2 457.2 889.0 178-229 209.6 10 1,720

O-4000 15,142 4978.4 2479.7 1473.2 2190.8 2514.6 457.2 812.8 178-229 209.6 12 2,713

O-5000 18,927 4978.4 2743.2 1574.8 2371.7 2698.8 457.2 812.8 178-229 136.5 12 2,849

O-6000 22,712 4978.4 3022.6 1828.8 2524.1 2851.2 311.2 622.3 178-229 136.5 16 3,081

O-7000 26,498 4978.4 3225.8 1981.2 2705.1 3029.0 311.2 622.3 178-229 136.5 16 3,135

O-8000 30,283 5791.2 3208.3 1981.2 2721.0 3029.0 304.8 647.7 178-229 136.5 18 3513

SECTION 9.0 - SENTRY II REPLACEMENT PARTS

9.1 Sentry II Replacement Parts Drawing, Main Control

Sentry II with Auto-Dosing Assembly Operating Instructions 58 Effective April 1, 2000

9.2 Sentry II Replacement Parts List, Main Control

Sentry II with Auto-Dosing Assembly Operating Instructions 59 Effective April 1, 2000

ITEM PART NO. DESCRIPTION

1 8822971 TRANSFORMER, 240/24 VAC, 75 VA (SEE ITEM 2 FOR 195 VAC)

2 8823060 TRANSFORMER, 195/24 VAC, 150 VA

3 8823007 RELAY, DPST, 240 VAC COIL, 30 AMP, NO

4 8822995 TEMPERATURE CONTROLLER, THERMOCOUPLE INPUT, 2 RELAY OUTPUT

5 8822988 INDICATOR LIGHT, 24 VAC, RED

6 8822989 PUSH-BUTTON SWITCH, LIGHTED, 24 VAC, GREEN

7 8822990 PUSH-BUTTON SWITCH, LIGHTED, 24 VAC, AMBER

8 8822991 PUSH-BUTTON SWITCH, LIGHTED, 24 VAC, BLUE

9 8822992 RELAY, 4PDT, 24 VAC, 14 PIN

10 8822993 RELAY, SOCKET, 14 PIN

11A 8823313 PROGRAMMABLE CONTROLLER, PLC, FACTORY PROGRAMMED (US)

11B 8823314 PROGRAMMABLE CONTROLLER, PLC, FACTORY PROGRAMMED (JAPAN)

12 8822985 TERMINAL STRIP, FUSED

13 8822983 FUSE CARTRIDGE, 1 AMP, 250V BUSS MDL-1

14 8822984 FUSE CARTRIDGE, 2 AMP, 250V BUSS MDL-2

15 8820704 FUSE CARTRIDGE, 3 AMP, 250V BUSS AGC-3

16 8800086 TOGGLE SWITCH, DPST, 10 AMP

17 8822981 SELECTOR SWITCH, 3 POSITION ROTARY

18 8823011 SPACER, .375" OD X 1.50" LG, NYLON

19 8822927 TERMINAL BLOCK, INSULATOR

20 8808268 REPLACEMENT BULB, 24 VAC

21 8820165 THERMOCOUPLE, 50 FEET

22 8822013 CABLE, PLC TO MTA HAND-HELD INTERFACE PROGRAMMER

23 8822179 MTA, HAND-HELD INTERFACE PROGRAMMER WITH CABLE (U.S. PROGRAM)

24 8823315 MTA, HAND-HELD INTERFACE PROGRAMMER WITH CABLE (JAPAN PROGRAM)

25 8820166 THERMOCOUPLE EXTENSION WIRE, 20/2 TYPE “T” (PURCHASED BY THE FOOT)

26 8822361 NUT, WIRE, ALL PLASTIC FOR THERMOCOUPLE CONNECTIONS

9.3 Sentry II Replacement Parts Kit, Dosing and Manifold Box

Sentry II with Auto-Dosing Assembly Operating Instructions 60 Effective April 1, 2000

9.4 Sentry II Replacement Parts List, Dosing and Manifold Box

Sentry II with Auto-Dosing Assembly Operating Instructions 61 Effective April 1, 2000

ITEM PART NO. DESCRIPTION

1A 8823002 BOX ASSEMBLY DOSING, SENTRY II (INCLUDES ITEMS 1-14), STANDARD LABEL

1B 8823365 BOX ASSEMBLY DOSING, SENTRY II (INCLUDES ITEMS 1-14), JAPANESE LABEL

2 8822996 TIMER, 230 VAC, 1-1023 SECONDS, DIP SWITCH SELECTABLE

3 8822997 SWITCH, TOGGLE, SPST, OFF/ON/MOMENTARY

4 8822998 SWITCH, TOGGLE, SPTT, ON/ON/ON

5 31381 WASHER, LOCK, TOGGLE SWITCH

6 31382 RING, LOCK, TOGGLE SWITCH

7 3995 BOOT, RUBBER, TOGGLE SWITCH

8 8822978 TERMINAL STRIP, 8 POLE

9 8822976 GEAR MOTOR, 230-VAC, 50/60-HZ, 58-RPM INTERMITTENT DUTY

10A 8822977 KIT, PERISTALTIC PUMP (INCLUDES HOUSING, COVER, ROLLER BRACKET, & .25" NORPRENE HOSE)

10B 8823710 .25" X 9" NORPRENE HOSE

11 8823011 SPACER, .375" OD X 1.5" LG. X .171" ID, NYLON

12 3200128 SCREW, MACHINE, .25-20NC X 1", 18-8 S/S

13 8822974 SCREW, MACHINE, 8-32 NC X 2.25", 18-8 S/S

14 8823030 TERMINAL BLOCK INSULATOR

15 8823021 ADAPTER, BARBED MALE

16 8823019 ELBOW, POLYPROPYLENE, 90 DEGREE X .25" BARB X .25" BARB

17 8823041 TUBE, .375" OD X .25" ID (CLEAR PVC)

18 8823042 TUBE, .375" OD X .25" ID (BLUE PVC)

19 8823043 TUBE, .375" OD X .25" ID (RED PVC)

20 8823068 HOSE CLAMP, PLASTIC, RYAN

21 8823236 BOX ASSEMBLY, MANIFOLD SOLUTION (INCLUDES ITEMS 22 - 33)

22 8823071 VALVE, SOLENOID, DUAL, 24-VAC

23 505263 CORD GRIP

24 3690 NUT LOCK CONDUIT

25 8823239 MANIFOLD, SOLUTION

26 8823614 SWITCH, PRESSURE, 5 PSI

27 8823602 ADAPTER HOSE, .5" MPT X .5" HOSE BARB

28 8823240 VALVE, CHECK, .25" MPT X .25" FPT

29 8823709 REDUCER, .25-18 NPT TO .25 UNF

30 8823241 COUPLING, QUICK CONNECT, BODY, .5" NPT

31 8823244 ADAPTER, THREADED, FEMALE

32 8823070 HOSE, .5" ID

33 30423 CLAMP, HOSE, S/S

34 30581 HOSE, .375" ID

35 93590 HOSE ASSEMBLY, WATER (INCLUDES HOT AND COLD HOSE, AND BACK FLOW PREVENTER)

36 8823243 COUPLING, QUICK CONNECT, INSERT, BARBED

37 8823301 COIL, SOLENOID, 24 VAC (REPLACEMENT ONLY)

9.5 Sentry II Replacement Parts Kit, Pump Assembly

Sentry II with Auto-Dosing Assembly Operating Instructions 62 Effective April 1, 2000

9.6 Sentry II Replacement Parts List, Pump Assembly

Sentry II with Auto-Dosing Assembly Operating Instructions 63 Effective April 1, 2000

ITEM QTY PART NO. DESCRIPTION

1A 1 30455 MOTOR, ELECTRIC, .75 HP, 208-230/50-60/1

1B 1 8823665 MOTOR, ELECTRIC, .75 HP, STAINLESS STEEL, 208-230/50-60/1

1C 1 30456 MOTOR, ELECTRIC, 1.5 HP, 208-230/50-60/1

1D 1 8823666 MOTOR, ELECTRIC, 1.5 HP, STAINLESS STEEL, 208-230/50-60/1

2 1 3909 SEAL, SHAFT

3A 1 31195 IMPELLER, 4.25" OD (.75 HP)

3B 1 8802751 IMPELLER, 5" OD (1.5 HP)

4 1 8823074 VALVE, DRAIN, 24 VAC, COIL

5 1 8823300 COIL, DRAIN, VALVE, 24 VAC

6 1 30419 ADAPTER, OUTLET, NEOPRENE, 2" X 2"

7 1 8823058 SCREEN, DRAIN VALVE

8A 1 8822415 SEAL, RETAINER (.75 HP)

8B 1 8822202 SEAL, RETAINER (1.5 HP)

9A 1 30690 GASKET, PUMP HOUSING, 6.625" OD (.75 HP)

9B 1 30691 GASKET, PUMP HOUSING, 8.125" OD (1.5 HP)

10A 1 8823672 PUMP, SUCTION HOUSING (300- TO 600-GALLON MILK COOLER)

10B 1 8823673 PUMP, SUCTION HOUSING (800- TO 1,600-GALLON MILK COOLER)

10C 1 8823678 PUMP, SUCTION HOUSING (2,000- TO 8,000-GALLON MILK COOLER)

11 1 8823232 CONNECTOR, CONDUIT, .375", 90°

12 1 8820593 WASHER, NEOPRENE

13 1 8822085 NUT, LOCK, CONDUIT, .5", NYLON

14 1 8823233 CONNECTOR, CONDUIT, .375", STRAIGHT

15 2LF 8823337 CONDUIT, FLEX, .375", LIQUID TIGHT

16 1 505263 CORD, GRIP, .25" - .375"

17 1 8823231 ELBOW, RUBBER, 45°, 1" ID X 1.375" OD

18 2 30420 CLAMP HOSE, STAINLESS STEEL

SECTION 10.0 - SENTRY II EQUIPMENT MARKINGS

10.1 Label No. 8822229, Lock Out

10.2 Label No. 8820482, Caution - Disconnect Power and Retain Latch

10.3 Label No. 8820623, Warning Symbol - Electrical

10.4 Label No. 8805616, Manual - Run Position

Sentry II with Auto-Dosing Assembly Operating Instructions 64 Effective April 1, 2000

LOCK OUT

HERE

BEFORE ENTERING TANK

DISCONNECT POWER TO
AGITATOR. REMOVE AND

RETAIN COVER LATCH.

8820482

▲

CAUTION

!

MANUAL

8805616

10.5 Label No. 8820248, Auto - Automatic Run Position

10.6 Label No. 8823064, Acid - Timer

10.7 Label No. 8823063, Detergent - Timer

10.8 Label No. 8823065, Sanitize - Timer

10.9 Label No. 8822584, Pump Motor - Wire Marker

10.10 Label No. 8802375, Agitator(s) - Wire Marker

10.11 Label No. 3791, Hot - Water Valve Marker

Sentry II with Auto-Dosing Assembly Operating Instructions 65 Effective April 1, 2000

AUTO

8820248

Acid

8823064

Detergent

8823063

Sanitize

8823065

PUMP MOTOR

8822584

HOT

3791

AGITATOR(S)

8802375

10.12 Label No. 8823609, Warning - Manifold Box

10.13 Label No. 8823013, Warning - Disconnect Power Before Servicing

10.14 Label No. 8801150, Warning - Disconnect Power Before Servicing

Sentry II with Auto-Dosing Assembly Operating Instructions 66 Effective April 1, 2000

DISCONNECT SENTRY II

®

CONTROL CABINET FROM

MAIN POWER SUPPLY

BEFORE SERVICING.

8908 8823013

▲

WARNING

!

Disconnect both condensing unit
and Mueller Matic

®

control cabinet
from main power supply before
servicing.

Antes de empezar a dar servicio o
reparar la unidad condensadora o
el gabinete de control del Mueller
Matic

®

, es indispensable
desconectarios del suministro de
corriente eléctrica.

Separez l’unité réfrigérant et la
cabine de contrôle du systéme
Mueller Matic

®

du câble de

distribution avant de réparer.

8801150

▲

WARNING

!

▲

PELIGRO

!

▲

ADVERTISSEMENT

!

10.15 Part No. 8822225, CE Data Tag (U.K. Models Only)

10.16 Label No. 8820410, Data Tag (U.K. Models Only)

10.17 Label No. 30612, Notice - Chart Accuracy

Sentry II with Auto-Dosing Assembly Operating Instructions 67 Effective April 1, 2000

PAUL MUELLER COMPANY

MILK COOLER

MODEL PART NO. SERIAL NO.

NOMINAL CAPACITY WEIGHT, EMPTY

VOLTS HERTZ PHASE F.L.A.

Note: For electrical characteristics of condensing unit, refer to

condensing unit data plate.

ISO PERFORMANCE CLASS REFRIGERANT

8820410

litres

kg.

®

Paul Mueller Company • 1600 W. Phelps • P.O. Box 828 •
Springfield, Missouri 65801-0828, U.S.A.

Year of Construction
Model Number
Serial Number
Noise Level
Weight

6911 8822225

Notice

The accuracy of these charts depends upon the proper
installation of the cooler.

Follow the detailed “leveling” instructions carefully.
Check the level indicator and test gauge reading before use.
Improper installation could result in claims by the buyer or
seller of the milk against the party making the installation.

6911 30612

®

10.18 Label No. 8820454, Dry Nitrogen Holding Charge

10.19 Label No. 8805299, Warning - HCFC Class II Refrigerant (To Be Applied After
Installation)

10.20 Label No. 30737, Bottom Temp-Plate

Sentry II with Auto-Dosing Assembly Operating Instructions 68 Effective April 1, 2000

THIS EQUIPMENT CONTAINS R-22 HYDROCHLOROFLUOROCARBON (HCFC CLASS II)

A SUBSTANCE THAT, IF RELEASED INTO THE ENVIRONMENT, WILL CONTRIBUTE TO A SERIOUS PUBLIC HEALTH AND
ENVIRONMENTAL PROBLEM BY DEPLETING THE OZONE LAYER. OZONE LAYER DEPLETION INCREASES THE RISK OF SKIN
CANCER AND OTHER DISEASES IN HUMANS AND IS HARMFUL TO PLANT AND ANIMAL LIFE.

THIS EQUIPMENT SHALL BE SERVICED AND DISPOSED OF ONLY IN ACCORDANCE WITH THE

OZONE DEPLETING

SUBSTANCES REGULATION - CLEAN ENVIRONMENT ACT.

N.B. This regulation is consolidated to September 30, 1992.

LE PRÉSENT ÉQUIPMENT CONTIENT R-22 HYDROCHLOROFLUOROCARBON (HCFC CLASS II)

UNE SUBSTANCE QUI, LORSQU’ÉMISE DANS L’ENVIRONNEMENT, CONSTITUE UN SÉRIEUX DANGER `A LA SANTÉ PUBLIQUE
ET

`

A L’ENVIRONNEMENT EN APPAUVRISSANT LA COUCHE D’OZONE. L’APPAUVRISSEMENT DE LA COUCHE D’OZONE

AUGMENTE LES RISQUES DE CANCER DE LA PEAU ET D’AUTRES MALADIES CHEZ LES HUMAINS ET CONSTITUE UN DANGER

`

A LA VIE VÉGÉTALE ET ANIMALE.

LE PRÉSENT ÉQUIPEMENT EST MIS EN SERVICE ET N’EST ÉLIMINÉ QU’EN CONFORMITÉ DU

RÉGLEMENT SUR LES

SUBSTANCES APPAUVRISSANT LA COUCHE D’OZONE - LOI SUR L’ASSAINISSEMENT DE L’ENVIRONNEMENT.

N.B. Le présent réglement est refondu au 30 septembre 1992.

ESTE EQUIPO CONTIENE FLUOROCARBURO HIDROCLORADO R-22 (HCFC CLASS II)

(Escriba el nombre de la substancia empobrecedora de la capa de ozono.)
UNA SUBSTANCIA QUE, SI SE SUELTA AL MEDIO AMBIENTE, CONSTITUIRA UN SERIO PELIGRO PARA EL AMBIENTE Y LA

SALUD PUBLICA AL EMPOBRECER LA CAPA DE OZONO. EL EMPOBRECIMIENTO DE LA CAPA DE OZONO AUMENTA EL RIESGO
DE CANCER A LA PIEL Y OTRAS ENFERMEDADES EN LOS SERES HUMANOS Y ES TAMBIEN DAÑINO PARA LA VIDA DE LAS
PLANTAS Y LOS ANIMALES.

EL MANTENIMIENTO Y LA ELIMINACION DE ESTE EQUIPO SOLO SE PODRA REALIZAR EN CUMPLIMIENTO CON

LAS NORMAS
SOBRE LAS SUBSTANCIAS EMPOBRECEDORAS DE LA CAPA DE OZONO - LEY PARA LA CONSERVACION DEL AMBIENTE
LIMPIO.

N.B. La presente norma se ha consolidado hasta el 30 de septiembre de 1992.

8805299

WARNING

▲

!

IMPORTANT

THIS EQUIPMENT CONTAINS A HOLDING CHARGE OF DRY NITROGEN GAS.
SLOWLY RELEASE PRESSURE THROUGH SERVICE PORTS OR SCHRADER VALVES
BEFORE REMOVING FITTINGS.

EVACUATE THE SYSTEM TO 500 MICRONS BEFORE CHARGING
WITH REFRIGERANT. DISCARD THIS TAG UPON CHARGING SYSTEM WITH
REFRIGERANT AND APPLY A SYSTEM REFRIGERANT SPECIFICATION DECAL.

NOTE: IT IS THE TECHNICIAN’S RESPONSIBILITY TO COMPLY WITH ALL CURRENT
REFRIGERANT USAGE REGULATIONS.

(11/94) 8820454

BOTTOM TEMP-PLATE

30737

®

10.21 Label No. 8822972, Transformer Wiring

10.22 Label No. 8822705, Canadian and U.S. Certification

10.23 Label No. 8822948, 24 and 240 VAC Component List

Sentry II with Auto-Dosing Assembly Operating Instructions 69 Effective April 1, 2000

LR67608

NPI 8822705

240V 208V COM

X4 X2 X3 X1

H1 H2

®

DAIRY FARM EQUIPMENT

®

DAIRY FARM EQUIPMENT

9910 8822972

Standard Transformer

Part No. 8822971 (240V)

Japanese Transformer

Part No. 8823060 (195V)

24V

195V

240V

24V

3 Remote Alarm Lamp (24 VAC)
4 Remote Cool Lamp (24 VAC)
5 Remote Wash Lamp (24 VAC)
6 Condensing Unit 1 (24 VAC)
7 Condensing Unit 2 (24 VAC)
8 Drain Valve (24 VAC)
9 Hot Water Solenoid (24 VAC)

10 Cold Water Solenoid (24 VAC)

2 Neutral (24 VAC)
11 Pressure Switch (N.O.)
12 Pressure Switch (N.O.)
13 Detergent Pump (240 VAC)
14 Acid Pump (240 VAC)
15 Sanitize Pump (240 VAC)
16 Pump Motor (240 VAC)
17 Pump Motor (240 VAC)
18 Agitator Motor (240 VAC)
19 Agitator Motor (240 VAC)
L1 Main Power (240 VAC)
L2 Main Power (240 VAC)

0003 8822948

10.24 Label No. 8820409, Mueller Name Tag

10.25 Label No. 8822980, Programmable Controller Name Tag

10.26 Label No. 8822558, Mueller Milk Cooler Data Tag

Sentry II with Auto-Dosing Assembly Operating Instructions 70 Effective April 1, 2000

8820409

PLC Part No. 8823313

(9907) 8822980

10.27 Label No. 30890, Mueller Data Tag - Control Box

10.28 Label No. 8820677, Ground Symbol

10.29 Label No. 3792, Cold - Water Valve Marker

10.30 Label No. 30397, Stainless Steel Symbol

Sentry II with Auto-Dosing Assembly Operating Instructions 71 Effective April 1, 2000

®

PRODUCT

MODEL NUMBER PART NUMBER SERIAL NUMBER

VOLTS HERTZ PHASE FLA

DISCONNECT MAIN POWER SUPPLY BEFORE SERVICING.

6911 ROMPRE LE CABLE DE DISTRIBUTION AVANT DE REPARER 30890

COLD

3792

®

®

Stainless

Steel

10.31 Label No. 30166, Caution - Vent Must Be Over Milk Inlet

10.32 Label No. 8820508, Hot - Tube Marker

10.33 Label No. 8802777, Caution - Do Not Sanitize

VENT ASSEMBLY MUST BE OVER
MILK INLET AT ALL TIMES.

EL ENSAMBLAJE DE VENTEO
DEBE ESTAR SOBRE LA
ENTRADA DE LA LECHE EN
TODO MOMENTO.

30166

▲

CAUTION

▲

¡

CUIDADO!

Sentry II with Auto-Dosing Assembly Operating Instructions 72 Effective April 1, 2000

!

!

HOT

8820508

Do not sanitize your cooler with solutions containing

in excess of 200 parts per million of chlorine.

Do not mix sanitizers or any chlorine containing

substances with acid as this will result in damage to

the stainless steel surface and can generate a gas

that is lethal to your health.

Do not exceed 170°F(76°C) during the wash cycles.

8905 8802777

▲

CAUTION

!

10.34 Label No. 8823146, Terminal Block - 24 VAC - 240 VAC

10.35 Label No. 8823263, Terminal Block - 240 VAC

Sentry II with Auto-Dosing Assembly Operating Instructions 73 Effective April 1, 2000

13 Detergent Pump (240v AC)
14 Acid Pump (240v AC)
15 Sanitize Pump (240v AC)
L1 Main Power (240v AC)
L2 Main Power (240v AC)
20 Used for Internal Wiring (240v AC)
21 Used for Internal Wiring (240v AC)
22 Used for Internal Wiring (240v AC)

9904 8823263

SECTION 11.0 - SAFETY

Note: See all safety, warning, and caution labels displayed in Section 10.

11.1 General

1. The Mueller milk cooler and Sentry II control system should be operated by qualified personal
who are familiar with the equipment and instructions.

2. Improper handling, operation, or service of the equipment, cleaning chemicals, and/or electricity
can create a health hazard and possible non-warranted damage to the equipment.

3. An authorized Mueller Service Representative who is trained and certified in electrical and
refrigeration work must perform all service.

4. The equipment can start automatically! Use extreme caution when servicing. All guards and covers
must be in place during operation to prevent mechanical and electrical hazards.

11.2 Manway

1. The Mueller milk cooler manway is supplied with a lock-out cover to prevent entry during
operation. Ensure that this is securely locked during operation.

2. Disconnect the power supply before entering the milk cooler. Follow “Confined Entry” laws and
regulations when entering the milk cooler.

Sentry II with Auto-Dosing Assembly Operating Instructions 74 Effective April 1, 2000

SECTION 12.0 - DISPOSAL

12.1 General

If the milk cooler and controls are removed from the installation site, ensure the materials, refrigerants,
and chemicals are handled and/or disposed of according to applicable codes and regulations.

12.2 Chemical Disposal

All detergents, acids, sanitizers, refrigerants, and oils can be harmful and toxic to the environment if
not properly disposed of. Consult each chemical label and comply with all local environmental
regulations and agencies.

12.3 Solid Component Disposal

The milk cooler’s basic components consist of steel, copper, rubber, and plastics which may be
separated and recycled. The “CFC-Free” foam insulation should be disposed of according to local
environmental regulations and agencies.

Sentry II with Auto-Dosing Assembly Operating Instructions 75 Effective April 1, 2000

Sentry II Service Reference Form, Programmable Features

Please detach, complete, and leave in Sentry II control box for future reference.

Mueller Authorized Dealer: End User/Owner:

Name: Name:

Address: Address:

Phone: Phone:

Contact: Contact:

Please check the selected program options:

Description: Options and Selection

Bottom Unit(s) Cooling Delay 0-120 minutes ________ minutes

All Units Cooling Delay 0-120 minutes ________ minutes

Pre-Start Cooling ______ 30 minutes ______ 60 minutes

Pre-Start Agitation ______ 30 minutes ______ 60 minutes

Interval Agitation ______ 3 out of 18 min. ______ 3 out of 30 min.

Sample Agitation ______ 2 minutes ______ 5 minutes ______ 10 minutes

Pre-Rinse Temperature ______ Cold ______ Warm

Fifth-Cycle for Complete Wash ______ On ______ Off ______ n/a Japan Program

Fifth-Cycle (Acid or Sanitize) ______ Acid ______ Sanitize ______ n/a Japan Program

Acid/Sanitize Temperature* ______ Cold ______ Warm

Delayed Start - Complete Wash ______ None ______ 45 minutes

*Selects sanitize temperature only with Japan program.

Sentry Information: Milk Cooler Information:

Part Number/Model: Part Number/Model:

Serial Number: Serial Number:

Comments:

Sentry II Operating Instructions Effective April 1, 2000

P.O. Box 828 • Springfield, Missouri 65801-0828, U.S.A.
Phone: [phone] • 1-800-MUELLER • Fax: [phone]
www.muel.com • E-mail: [e-mail]

International Inquiries - Fax: [phone] • E-mail: [e-mail]

®

(2/00) 8823644