***** 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 Controls Kit Number: K08.61 Electronic Remote Controls Kit Number Number: K05.3 With 150 feet of Remote Wire Kit Number: K09.
INSTALLATION, OPERATION & MAINTENANCE OWNERS MANUAL Model: Voltage: Ref.
TABLE OF CONTENTS Model ……………………………………………………………………………………………… 1 Caution ………………………………………………………………………………………….… 2 Starting Check List ………………………………………………………………………………. 3 Wiring Diagram …………………………………………………………………………………… 5 Setting Solid State Controls & Solid State Control Panel……….………………………….…. 6 Chilled Water Distribution Piping ……………………………………………………………….. 8 Installation Instructions …………………………………………………………………………..
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.
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 judgments 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.
24V RED L3 L2 L1 1W T2 24 VAC G round Low Lev Pum p 1C Comp 1 T3 ALARM 4 2 TIME 1 DELAY 0 NC CO M NO T1 TC INPUTS RETURN DISCHARGE + - + - T1 T2 R ed Y ellow Ye llo w T1 Temp.
SETTING SOLID STATE CONTROL This unit has a solid-state control that controls the temperature on the refrigeration system. After the unit is wired to the proper voltage the control temperature and high temperature alarm can be set. 1. On the front of this control is the temperature display, to set the temperature press and hold button #2 while turning the set point screw above button #2. The temperature display will indicate the set temperature as you turn the set point screw. 2.
SPECIAL CONTROL FEATURES 1) Control LED’s for stage 1 & 2 will indicate "GREEN" when the DISCHARGE temperature is above their set point without time delay. 2) Power LED's for compressor 1 & 2 will indicate "GREEN" when the contactor driver is ON after a call for cooling from the set point and after the time-delay has occurred. 3) Temperature alarm will have a relay with dry contacts (rated for 7A) that will energize if DISCHARGE temperature is above set point.
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. NO BLACK IRON PIPE. 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.
INSTALLATION INSTRUCTIONS Air or Water Cooled Chillers 1. When the chiller is received, check for any shipping damage. If any is found, a 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.
7. Check the voltage on the chiller to see that it matches your supply. When applying power to the water pump (by turning the manual switch on), make sure all the switches on the control panel are in the "off" position. It is necessary to check the rotation of the water pump. The motors on all pumps have an internal overload protection. 8. Power to the unit should be on for 3 hours prior to full usage to allow the crank case heater to heat the compressor.
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 The control circuit for the refrigeration system has several controls wired in series. First are the high and low-pressure switches that are mounted in the control panel.
CHILLED WATER CIRCUIT The chilled water is pumped from the chiller's water tank 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 tank. Be sure to keep all lines full size (1"). If the size of the lines are reduced, then the flow of water will be restricted, and thus resulting in improper chilling.
REFRIGERATION SYSTEM: The refrigeration system is a medium temperature system with a range from 35°F to 70°F. This is the most efficient range. If temperatures 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.
FAN MOTOR SPECIFICATIONS Refer to your model number & voltage Model # H.P. Voltage 50AC 100AC 100AC 150AC 200AC 300AC 400AC 500AC 600AC 750AC 800AC 1001AC 1000AC 1250AC 1500AC 2000AC 2500AC 3000AC 1/4 Hp 1/4 Hp 1/4 Hp 1/4 Hp 1/2 Hp 1/2 Hp 1/2 Hp 1/2 Hp 1/2 Hp 1/2 Hp 1/2 Hp 1/2 Hp 1/2 Hp 1/2 Hp 1 Hp 1 Hp 1 Hp 1 Hp 115/208/230-1 Ph. 115/208/230-1 Ph. 460-3 Ph. 208/230/460-3 Ph. 208/230/460-3 Ph. 208/230/460-3 Ph. 208/230/460-3 Ph. 208/230/460-3 Ph. 208/230/460-3 Ph. 208/230/460-3 Ph. 208/230/460-3 Ph.
14 Installation, Operation and Maintenance Instructions. Model NPE/NPE-F DESCRIPTION & SPECIFICATIONS: The models NPE (close-coupled) and NPE-F (framemounted) are end suction, single stage centrifugal pumps for general liquid transfer service, booster applications, etc. Liquid-end construction is all AISI Type 304 stainless steel, stamped and welded. Impellers are fully enclosed, non-trimable to immediate diameters. Casings are fitted with a diffuser for efficiency and for negligible radial shaft loading.
2.3.2. Place unit in position on wedges located at four points (two below approximate center of driver and two below approximate center of pump). Adjust wedges to level unit. Level or plumb suction and discharge flanges. 2.3.3. Make sure bedplate is not distorted and final coupling alignment can be made within the limits of movement of motor and by shimming, if necessary. 2.3.4. Tighten foundation bolts finger tight and build dam around foundation.
6.1.1. Single-phase motor: Non-reversible. 6.1.2. Three-phase motor: Interchange any two power supply leads. 9.4.4. Remove impeller (101) by turning counterclockwise when looking at the front of the pump. Protect hand with rag or glove. CAUTION Failure to remove impeller in a counter-clockwise direction may damage threading on the impeller, shaft or both. 7. Operation: 7.1. Before starting, pump must be primed (free of air and suction pipe full of liquid) and discharge valve partially open.
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WARNING Overcharging a refrigeration or air conditioning system can be dangerous. **** If a system refrigerant overcharge is sufficient to immerse the major parts of the motor and compressor in liquid refrigerant, a situation has been created which, when followed by unusual circumstances can lead to compressor housing seam separation or rupture.
SERVICE BULLETIN HERMETIC COMPRESSOR ELECTRICAL TERMINAL VENTING CAN BE DANGEROUS **** When the insulating material, which supports a hermetic compressor electrical terminal, suddenly disintegrates due to physical abuse or as a result of an electrical short between the terminal and the compressor housing, the terminal may be expelled, venting the vaporous and liquid contents of the compressor housing and system.
Hermetic compressors can be properly serviced without unnecessarily removing the terminal PROTECTIVE COVER by adhering to the following service procedures: 1. If the branch circuit, short circuit, and ground fault protective device, i.e., fuse or circuit breaker, is open, this is a strong indication that an electrical problem exists and must be found and corrected.
8. Repeat #5 testing, carefully checking for ground, directly between each compressor terminal (C, S, & R) and ground. 9. If once again a ground is indicated, proceed to properly replace the compressor, as it has failed and cannot be repaired. 10. It is important to note that a volt-ohmmeter may be used only to check the resistance and/or continuity of the motor windings.
Again, we want to stress that it is essential that WHENEVER ELECTRIC POWER is applied to the motor-compressor, the terminal PROTECTIVE COVER must be properly in place. Servicing refrigeration and air conditioning systems can be dangerous, and extreme caution in all respects should be exercised by the personnel servicing such equipment. The precautions discussed in this bulletin deal only with those dangers associated with VENTING TERMINALS.
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.
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
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.
CHILLER PARTS IDENTIFICATION 27
PARTS LIST 300AC-220/3 460/3 M.R.I. UNIT If this unit has special feature(s) installed, see appendix for part number(s).
P145-2S P149-WSGA P151-1.0 P151-WSG P160-1.0 P160-2 P155 K08.6P K08.
Schreiber Limited Warranty Schreiber warrants the product described herein against defective material or workmanship for one year from the date of purchase. If any part is found to be defective within the warranty period, Schreiber, or its authorized service agent, will replace, or at Schreiber's options, repair the part free of charge for materials and labor. This warranty does not cover damage caused by misuse, accident, abuse, incorrect installation or operation.
APPENDIX SPECIAL FEATURES
MRI SPECIAL FEATURES Manual Bypass This unit has an adjustable water by-pass. It can be adjusted in the field. This feature cuts down the amount of flow of water coming out of the water pump. Kit Number: K08.12 : Discharge Pressure Gauge There is a water pressure gauge on the water discharge line of the water pump, reading the water pressure. Kit Number: k08.19 Pump Upgrade The standard water pump in this unit has been upgraded to a 2 HP stainless steel pump.
