Mueller SENTRY II Owner's manual

SENTRY®II
WITH WATER WORKS BOX
INSTALLATION • OPERATION • MAINTENANCE
Part No. 8823728
Effective April 1, 2000
Revised November 10, 2003
®
THE MILK COOLING SYSTEMS SPECIALISTSTM

®
Table of Contents
SENTRY™II WITH WATER WORKS BOX
INSTALLATION AND OPERATION MANUAL
Section 1.0 - Introduction
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 and Cleaning Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .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
2.18 Milk Cooler Vent Assembly Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 13—Milk Cooler Vent Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Section 3.0 - Electrical Wiring
3.1 Field Electrical Connections at Milk Cooler’s Rear Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Figure 14—Milk Cooler Electrical Terminal Strip (Rear Junction Box) . . . . . . . . . . . . . . . . . . . . . . . . . .16
Figure 15—Electrical Schematic - Rear Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Figure 16—Internal Conduit Raceways - Milk Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Figure 17—Electrical Schematic - Field Wiring (Enlarged Schematic Attached in Back) . . . . . . . . . . . . .19
Part No. 8823728

Section 3.0 - Electrical Wiring - Continued
Figure 18—Electrical Schematic - Factory Wiring (Enlarged Schematic Attached in Back) . . . . . . . . . . .20
Figure 19—Relay and Switch Contact Positions (For Sentry II with Water Works Box) . . . . . . . . . . . . . .21
3.2 PLC Electrical Troubleshooting (Input and Output Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Table 1—PLC Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 20—Electrical Schematic - PLC (For Sentry II Models with Water Works Box) . . . . . . . . . . . . . . .23
Figure 21—Electrical Schematic - Water Works Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .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 22—Sentry II Thermocouple Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
4.3 Sentry II Thermocouple Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Figure 23—Sentry II Thermocouple Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Figure 24—Sentry II Thermocouple - Temperature Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.4 Important Thermocouple Splicing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.5 Sentry II Temperature Control Calibration Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.6 Sentry II Temperature Control Lock and Unlock Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 25—Sentry II Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
4.7 Sentry II Temperature Control Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
4.8 Sentry II Temperature Control Set Point Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
4.9 Sentry II Temperature Control Unit of Measure (Fahrenheit or Celsius) . . . . . . . . . . . . . . . . . . . . . . . .30
Section 5.0 - Chemical Dosing with Sentry II Water Works Box
5.1 Determining Chemical Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
5.2 Chemical Cautions (Additional Cautions are Listed in Section 2.15) . . . . . . . . . . . . . . . . . . . . . . . . . . .31
5.3 Determining Water Usage Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Figure 26—PLC Fill-Time Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Table 2—Minimum Water Requirements (Per Cycle) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
5.4 Determining Actual Water Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Table 3—Calculated Water Usage (Fill-Time/Supply Pressure) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
5.5 Wash Cycle Timing Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Chart 1—Detergent Wash or Complete Wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Chart 2—Acid Cycle or Sanitize Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Section 6.0 - Sentry II PLC Programming
6.1 Sentry II Programmable Features, Options, and Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . .36
6.2 Sentry II - MTA to PLC Programming Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
6.3 Sentry II Service Reference Form, Programmable Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Section 7.0 - Operating Instructions
7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Figure 27—Sentry II Operating Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
7.2 Cool-Off-Wash Rotary Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
7.3 Cooling Bottom Units Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
7.4 Cooling All Units Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
7.5 Pre-Start Cooling Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
7.6 Pre-Start Agitator Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
7.7 Detergent Cycle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
7.8 Acid Cycle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Table of Contents - Continued

Section 7.0 - Operating Instructions - Continued
7.9 Sanitize Cycle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
7.10 Agitate Sample Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
7.11 Alarm Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
7.12 Milk Temperature Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
7.13 Cooling Override Switch (Emergency Use Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Section 8.0 - Weights and Dimensions
8.1 English Weights and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
8.2 Metric Weights and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Section 9.0 - Sentry II Equipment Markings
9.1 Label No. 8822229, Lock Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.2 Label No. 8820482, Caution - Disconnect Power and Retain Latch . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.3 Label No. 8820623, Warning Symbol - Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.4 Label No. 8805616, Manual - Run Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.5 Label No. 8820248, Auto - Automatic Run Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.6 Label No. 8822584, Pump Motor - Wire Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.7 Label No. 8802375, Agitator(s) - Wire Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.8 Label No. 3791, Hot - Water Valve Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
9.9 Label No. 3792, Cold - Water Valve Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
9.10 Label No. 8823612, Warning - Water Works Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
9.11 Label No. 8823013, Warning - Disconnect Power Before Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
9.12 Label No. 8822225, CE Data Tag (U.K. Models Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
9.13 Label No. 8801150, Warning - Disconnect Power Before Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
9.14 Label No. 8820410, Data Tag (U.K. Models Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
9.15 Label No. 30612, Notice - Chart Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
9.16 Label No. 8820454, Dry Nitrogen Holding Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
9.17 Label No. 8805299, Warning - HCFC Class II Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
9.18 Label No. 30737, Bottom Temp-Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
9.19 Label No. 8822972, Transformer Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
9.20 Label No. 8822705, Canadian and U.S. Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
9.21 Label No. 8823729, 24 VAC and 240 VAC Component List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
9.22 Label No. 8820409, Mueller Name Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
9.23 Label No. 8823369, Programmable Controller Name Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
9.24 Label No. 8822558, Mueller Milk Cooler Data Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
9.25 Label No. 30890, Mueller Data Tag - Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
9.26 Label No. 8820677, Ground Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
9.27 Label No. 30397, Stainless Steel Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
9.28 Label No. 30166, Caution - Vent Must Be Over Milk Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
9.29 Label No. 8802777, Caution - Do Not Sanitize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
9.30 Label No. 8823146, Terminal Block - 24 VAC - 240 VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Section 10.0 - Safety
10.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
10.2 Manway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Section 11.0 - Disposal
11.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
11.2 Chemical Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
11.3 Solid Component Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Table of Contents - Continued

SECTION 1.O - INTRODUCTION
1.1 General
The Mueller®Sentry™II refrigeration and cleaning control 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 efficiency,
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.
1
Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003

Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
Figure 1 - Sentry II Control Cabinet and Milk Cooler Components
2
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. Water Works Box
N. Hot Water Solenoid
O. Cold Water Solenoid
P. Detergent Jar
Q. Acid/Sanitize Jar
R. Fill Line Disconnect -
3
/ 8 " x
5
/ 8 "
S. Flow Control Orifice
T. Wash Pump Assembly
U. Electric Drain Valve
V. External Trough - Raceway
R
S
3/8" ID Hose
5/8" Water/Chemical
Fill Line to Milk Cooler
A
WASH
M LK TEMPERATURE
ALARM
OFF
COOL
COOLING BOTTOM UNITS
COOLING ALL UNITS
PRE START COOL NG
PRE START AG TATOR
DETERGENT CYCLE
AC D CYCLE
SANITIZE CYCLE
AGITATE SAMPLE
B
C
D
E
F
G
H
I
J
K
L
ACID
SAN T ZER DETERGENT
Q
P
O
N
M
V
T
U

Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
SECTION 2.0 - INSTALLATION
2.1 Crate Removal
IMPORTANT: 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
Floor Jack
Self-Tapping Screws
Skid
Cross Brace
Cradle Block
Block skids to ensure safety while removing the
self-tapping screws from the bottom of each leg.
3
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Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
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 non-
warranted 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.
IMPORTANT: 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.
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Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
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)
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.
*Section 8 provides approximate net weights of Mueller milk coolers.
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
5
DFE0161
Contact a local civil engineer for footer and foundation requirements.
!
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Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
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
6
DFE0161
Place level across manway opening
with manway cover and gasket removed.
Side Mounted Levels
Adjust milk cooler legs
with a nylon strap wrench.
Floor Jack
Wood Cradle Block

Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
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
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Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
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
8

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 Never-
Seez®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 flat-
washer 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 on the wiring schematic
in motor, 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 Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
9

Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
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
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Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
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 water works box in an area protected from freezing and within easy access to the
chemical storage drums.
2.14 Water Line Connections
1. Connect the backflow preventors and hot and cold water fill hoses between the water supply
valves and water solenoid valves located in the right side of the water works box. See Figure 10.
2. Route the fill line hose between the water works box and fill nipple located on the wash pump
assembly. See Figures 6 and 7.
3. Insert the flow control orifice and fill line disconnect in the fill line hose at a location easily
accessible for the operator. See Figures 6, 7, and 10.
NOTE: The fill line disconnect should be separated when cooling or storing milk.
Figure 10 - Sentry II Control Box Installation and Water Connections
11
Fill Line Disconnect
5/8" Flow
Control
Orifice
Hot
Cold
Water Supply Valves
Backflow Preventers
Hot and Cold Water Fill Hoses
WASH
M LK TEMPERATURE
ALARM
OFF
COOL
COOLING BOTTOM UN TS
COOLING ALL UNITS
PRE-START COOLING
PRE-START AGITATOR
DETERGENT CYCLE
ACID CYCLE
SANIT ZE CYCLE
AG TATE SAMPLE
AC D
SANITIZER DETERGENT
Support fill line in
PVC pipe and long-
radius sweep elbows.
NOTE: Locate water works box
convenient for operator and
protect from freezing.
5/8" ID Hose
3/8" ID Hose
3/8" X 5/8"

2.15 Chemical and Cleaning Cautions
▲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.
▲Wear eye protection, rubber gloves, and aprons when handling chemicals.
▲Follow all instructions, warnings, and health hazard information provided by chemical manufacturer.
▲Request a copy of the Material Safety Data Sheet (MSDS) for each cleaning chemical in use. Keep
these readily available and be familiar with the first aid instructions and emergency contacts in case
of a chemical accident or spill.
▲Keep all chemicals out of reach of children.
▲Only use cleaning solutions and materials specifically recommended for stainless steel and approved
for food handling equipment.
▲Never use more chemical than called for by the chemical manufacturer’s instructions. Excessive use
of cleaning chemicals can corrode and cause permanent damage to the stainless steel.
▲Do not sanitize your milk cooler with solutions containing in excess of 200 parts per million of
chlorine. This can cause permanent damage and corrosion to the stainless steel.
▲Never mix any chlorine containing compounds with acid. This can result in damage to the stainless
steel and can generate a hazardous gas dangerous to your health.
▲Never wash the milk cooler with water temperatures exceeding 170°F (76.6°C).
▲Never allow tools, clamps, or other wet objects to lie on the surface of the milk cooler.
▲Keep all surfaces of the milk cooler clean.
▲Never use abrasive materials on the stainless steel.
▲Never put cleaning chemicals in an empty milk cooler. Always have
water in the cooler first for proper chemical dilution.
▲The milk cooler’s vent assembly must be in place at all times. This milk
cooler is not designed for pressure or vacuum applications. Severe damage
can occur if not properly ventilated.
▲Before entering the milk cooler, disconnect power to the agitator, remove and
retain manway cover latch, and remove footwear that could scratch the stainless
steel. An additional person must be present for safety purposes during confined entry.
▲Always open manway cover for additional venting while the milk cooler is
being emptied.
▲Inspect the milk cooler ladder hardware on a regular basis. Never climb a ladder
which is in need of repair.
12
CAUTION
WEAR EYE PROTECTION,
RUBBER GLOVES, AND
APRONS WHEN HANDLING
CHEMICALS
CORROSIVE
POISON
Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003

Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
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 Figure 11 for detailed installation procedures.
Figure 11 - Manway Wash Tube
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Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
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 Figure 12.
Figure 12 - Spray Dish Orientation
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Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
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 13.
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 13 - Milk Cooler Vent Assembly
15
!
CAUTION
¡CUIDADO!
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

Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
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 14.
Figure 14 - 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" (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.
16