Manual

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2500AC

TABLE OF CONTENTS

Model ……………………………………………………………………………………………… 1

Caution ………………………………………………………………………………………….… 2

Starting Check List ……………………………………………………………………………….. 3

Wiring Diagram …………………………………………………………………………………… 5

Setting Solid State Controls…………………………………………………………………….. 6

Solid State Control Panel ……………………………………………………………………….. 7

Chilled Water Distribution Piping………………………………………………………………… 8

Installation Instructions …………………………………………………………………………… 9

Special Instructions………………………………………………………………………………. 11

Fan Motors ……………………………………………………………………………………….. 14

Water Pump ……………………………………………………………………………………… 15

Refrigeration System……………………………………………………………………………… 19

Service Bulletin …………………………………………………………………………………… 20

Crank Case Heaters ……………………………………………………………………………. 23

Maintenance Information………………………………………………………………………... 24

Trouble Shooting – Part I ……………………………………………………………………... 25

Trouble Shooting – Part II ………………………………………………………………………. 26

Chiller Parts Identification ………………………………………………………………………. 27

Parts ……………………………………………………………………………………………… 28

Limited Warranty …………………………………………………………………………….….. 29

Special Feature)s) Appendix

Schreiber Engineering Corp

12111 East Park Street, Cerritos CA 90703

Phone (562) 926-3855 Fax (562) 926-0969

Summary of content (19 pages)

PAGE 1
TABLE OF CONTENTS Model ……………………………………………………………………………………………… 1 Caution ………………………………………………………………………………………….… 2 Starting Check List ……………………………………………………………………………….. 3 Wiring Diagram …………………………………………………………………………………… 5 Setting Solid State Controls…………………………………………………………………….. 6 Solid State Control Panel ………………………………………………………………………..
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WATER CHILLER STARTING CHECKLIST PROPER VOLTAGE Check the voltage on the chiller to see that it matches your power supply. CRANK CASE HEATER Power to the unit should be on for 3 hours prior to full usage to allow the crank case heater to heat the compressor. PLEASE READ SECTION ON CRANK CASE HEATER ON PAGE 17. MOTOR ROTATION Make sure the fan motors and water pumps are running in the correct rotation.
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CONT. WATER CHILLER STARTING CHECKLIST ELECTRIC – POWER A good test to make sure power is off to the unit is to turn on the water pump switch. If power is on, the light on this pump will be on. We recommend you take caution in all judgment about the power being on. The best test to find if the power is on is to use a voltmeter. Please Note: A single-phase condition can cause a pilot light to be out and still have voltage to the unit. TESTING STANDARDS All components on the chiller meet UL's standards.
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24V RED L3 24 VAC Ground Low Lev Pump Con 1 Con2 1W T1 T2 4 2 TIME 1 DELAY 0 NC L1 ALARM COM NO L2 TC INPUTS RETURN DISCHARGE + - + - T3 R ed Y ellow T2 Black RED T1 Ye llo w 1C T3 Temp. Probes 2C 1LL WHITE T1 PURPLE T2 BLACK / WHITE T3 WHITE 1F 1W PINK T1 T2 PURPLE T3 1HP 1C 1LP 1FR T1 T2 T3 Note: No fans or fan contactor on WC models.
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SETTING SOLID STATE CONTROL This unit has solid state controls that regulates the temperature of the refrigeration system. After the unit is wired to the proper voltage, the temperature and high temperature alarm can be set. Setting the Temperature Refrigeration System One Press and hold the black button #7 as you turn the set point screw. The temperature shown on the discharge temperature display will indicate the temperature set point as you turn the set point screw.
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CHILLED WATER DISTRIBUTION PIPING The chilled water distribution piping is an important factor in the performance of the water chiller. Proper piping will add to the LIFE of your chiller. This chiller is designed to be a containment free system. The chilled water piping should be the same. 1. If you are installing this water chiller to some existing chiller water lines (Black or galvanized) there is a good chance there will be rust in this system.
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INSTALLATION INSTRUCTIONS Air or Water Cooled Chillers 1. When the chiller is received, check for any shipping damage. If any is found, freight claim should be filed at once with the carrier. 2. This water chiller is designed with a contaminant free chilled water system, stainless steel reservoir, and all copper evaporator. Installed properly, it will give you years of trouble free service.
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7. Fill the water reservoir through the reservoir fill inlet. Fill the reservoir until it reaches the level as marked on the water sight glass. The water level should be kept within ½" of the marked level. Do not fill the water reservoir with DEIONIZED WATER. If an automatic water fill is installed on the unit, it will maintain the proper water level automatically. In the event you ever over fill the reservoir, there is an overflow. 8. Check the voltage on the chiller to see that it matches your supply.
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SPECIAL INSTRUCTIONS WATER PUMP The water pump is controlled by the manual switch for off and on operations. The motor on this pump has a built-in overload protection, as do all the motors in our system. ELECTRICAL CONTROLS - Control Circuit 24 Volts This unit has two separate 12.5-ton refrigeration systems, each system having its own wiring circuit. Both circuits are the same. The control circuit for the refrigeration system has several controls wired in series.
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CHILLED WATER CIRCUIT The chilled water is pumped from the chiller's water reservoir to the discharge outlet of the chiller. Then from the discharge outlet, the water travels to the object to be cooled, through the heat exchanger, and returns through the chillers return line into the water reservoir. Be sure to keep all lines full size (2"). If the size of the lines are reduced, then the flow of water will be restricted, and thus resulting in improper chilling.
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REFRIGERATION SYSTEM The refrigeration system is a medium temperature system with a range from 35o F to 70o F. This is the most efficient range. If temperature below or above this range are required, they should be discussed with our engineering department. The refrigeration system also includes a hermetically sealed refrigeration system and all parts, except the evaporator coil, are standard to the refrigeration industry.
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FAN MOTORS SPECIFICATIONS: H.P. 1 each – 3 per unit. VOLTAGE - 460 3 phase HZ-50-60 RPM 1725 OVERLOAD - Automatic, Internal FRAME - LA56, ROT. CW from top of unit. MTG - Rigid, Open Motor CAT. NO. Leeson #111311 ROTATION: Motor can run either direction, clockwise (CW) or counter clockwise (CCW). Note the given direction on unit. – We set at the above rotation. FAN BLADE: 24" x 23o CW OR CCW – 3 each.
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MAINTENANCE INFORMATION 1. There are no lubrication points on the chiller. All motors have permanent lubrication in the bearings. 2. The water that is used in the chilled water circuit has no special requirements, except that deionized water cannot be used. The water should be clean and some type of water conditioner can be used. Nothing should be used in the chilled water circuit that could damage the all copper Heat Exchanger. THIS INCLUDES THE USE OF DEIONIZED WATER. 3.
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TROUBLE SHOOTING - PART I SYMPTOM DIAGNOSIS REMEDY Check Power supply Electrical circuit Correct circuit breaker Repair or replace bad circuit Line load voltage Temperature control Compressor overload Low pressure switch High pressure switch Manual switch Compressor All control circuit Correct voltage condition Repair or replace Replace Repair or replace Repair or replace Replace Replace Repair Check Compressor won't run Compressor runs No refrigeration Refrigerant leak Stuck expansion valve Repai
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TROUBLE SHOOTING - PART II REFRIGERATION SYSTEM INTERNAL PRESSURE USING REFRIGERANT R-22 * High Pressure Switch : Manual Reset - Cut out at 425 P.S.I. * Low Pressure Switch : Automatic Reset - Cut out at 25 P.S.I. WORKING REFRIGERANT PRESSURES R-22 * High Pressure : 185 to 325 P.S.I. * Low Pressure : 45 to 70 P.S.I. ***NOTE*** These pressures are under normal ambient temperatures and chilled water temperatures.
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PARTS LIST 2500AC/WC - 460/3 If this unit has special feature(s) installed, see appendix for part number(s). Part Number Description 460/3 Refrigeration R113-B R127 R177 R135-1 R136-2 R137 R140-12 R141-15 R144 R146-15 R154 R134 R181 R182 R183 R192 Electrical E100 E101-H E101-S E102 E103 E104 E111 E115 E128A-2 E128P*-D E128P-R E136 E143-B E149 E151 E153-24 E124-3 E166 Plumbing P128-S P145-35 P150-WSGA P152 P152-WSG P155 P160-25 Qty. Compressor – 440/3 – 12.5 HP Condenser – Air Cooled – SCC12.
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***** SPECIAL FEATURE ***** This unit has been modified for outdoor use Any reference in this manual stating “cannot be used for outdoor installation” does not apply to this unit The following feature has been added for this purpose: Head Pressure Control Kit Number: K08.69 Electronic Remote Controls Kit Number Number: K05.7 With 150 feet of Remote Wire Kit Number: K09.