AE4-1302 R9
Application Guidelines For
K4 Refrigeration Copeland Scroll
™
Compressors 7.5 - 15 Horsepower
AE4-1302 R9
May 2014
TABLE OF CONTENTS
Section Page Section Page
Safety Instructions ................................................... 2
Safety Icon Explanation ........................................... 2
Instructions Pertaining to Risk of
Electrical Shock, Fire, or Injury to Persons.............. 3
Safety Statements ................................................... 3
Introduction ...............................................................4
Nomenclature ...........................................................4
Operating Envelope ..................................................4
Liquid or Vapor Injection ...........................................4
Accumulators ............................................................4
Superheat Requirements .........................................4
Crankcase Heat ........................................................5
Discharge Line Thermostat ......................................5
Pressure Controls .....................................................5
IPR Valve .................................................................5
Motor Protection .......................................................5
Programmable Logic Controller Requirements ........5
Phase Protection ......................................................5
Module and Sensor Functional Check......................6
Module Voltage Supply Troubleshooting ..................6
Sensor Troubleshooting............................................6
Compressor Voltage Supply Troubleshooting ..........6
Oil Type ....................................................................6
Oil Management for Rack Applications.....................7
Discharge Mufflers....................................................7
Compressor Mounting ..............................................7
Connection Fittings ...................................................8
Three Phase Scroll Compressors — Directional
Dependence .............................................................8
Deep Vacuum Operation ..........................................8
Unbrazing System Components ...............................8
HiPot Testing ............................................................8
Copeland Scroll Functional Check ...........................9
Figures & Tables
Application Envelopes .............................................10
Copeland Scroll K4 Liquid Injection ........................ 11
Copeland Scroll K4 Vapor Injection ........................ 11
Scroll Wiring Schematic.......................................... 11
OMB Electronic Oil Level Management System
Installation and Service Instructions ....................... 12
7.5 - 15 HP Copeland Scroll Rack Mounting .......... 13
7.5 - 15 HP Copeland Scoll Condensing Unit
Mounting .............................................................. 13
Typical Suction Tubing............................................ 13
Typical Injection Tubing .......................................... 13
Refrigerants and Lubricants ................................... 14
Capillary Tubes for Liquid or Vapor Injection .......... 14
External Wrap-Around Crankcase Heater Numbers
Conduit Ready Terminal Box Numbers .................. 14
Pressure Control Settings....................................... 14
Technical Data Summary........................................ 15
© 2014 Emerson Climate Technologies, Inc.
Printed in the U.S.A.
1
AE4-1302 R9
Safety Instructions
Copeland Scroll
Copeland Scroll
™
™
compressors are manufactured according to the latest U.S. and European Safety
compressors are manufactured according to the latest U.S. and European Safety Standards.
Particular emphasis has been placed on the user's safety. Safey icons are explained below and safety instructions applicable to the products in this bulletin are grouped on Page 3. These instructions should be retained throughout
to follow these safety instructions.
You are strongly advised to follow these safety instructions.
Safety Icon Explanation
DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
CAUTION
WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION, used with the safety alert symbol, indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
NOTICE
CAUTION
NOTICE is used to address practices not related to personal injury.
CAUTION, without the safety alert symbol, is used to address practices not related to personal injury.
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2
Instructions Pertaining to Risk of Electrical Shock, Fire, or Injury to Persons
WARNING
ELECTRICAL SHOCK HAZARD
• Disconnect and lock out power before servicing.
• Discharge all capacitors before servicing.
• Use compressor with grounded system only.
• Molded electrical plug must be used when required.
• Refer to original equipment wiring diagrams.
•
• Failure to follow these warnings could result in serious personal injury.
AE4-1302 R9
WARNING
PRESSURIZED SYSTEM HAZARD
• System contains refrigerant and oil under pressure.
• Remove refrigerant from both the high and low compressor side before removing compressor.
•
• Never install a system and leave it unattended when it has no charge, a holding charge, or with the service valves closed without electrically locking out the system.
• Use only approved refrigerants and refrigeration oils.
• Personal safety equipment must be used.
• Failure to follow these warnings could result in serious personal injury.
WARNING
BURN HAZARD
• Do not touch the compressor until it has cooled down.
• Ensure that materials and wiring do not touch high temperature areas of the compressor.
• Use caution when brazing system components.
• Personal safety equipment must be used.
• Failure to follow these warnings could result in serious personal injury or property damage.
CAUTION
COMPRESSOR HANDLING
• Use the appropriate lifting devices to move compressors.
• Personal safety equipment must be used.
• Failure to follow these warnings could result in personal injury or property damage.
Safety Statements
• Refrigerant compressors must be employed only for their intended use.
• install, commission and maintain this equipment.
•
• All valid standards and codes for installing, servicing, and maintaining electrical and refrigeration equipment must be observed.
© 2014 Emerson Climate Technologies, Inc.
Printed in the U.S.A.
3
Introduction
The Copeland Scroll
™ refrigeration compressor product offering has expanded into the higher horsepower ranges. The scope of this bulletin will cover the application parameters unique to the new models.
Nomenclature
The Copeland Scroll model numbers include the nominal capacity at the standard 60 Hertz “ARI” rating conditions. Please refer to product literature for model number details.
Operating Envelope
These Copeland Scroll models can also be used with a variety of refrigerants. Table 1 at the end of this bulletin shows the selection options
The operating envelopes are depicted in
Figures 1A through 1D at the end of this bulletin. See Oil Type section for recommended lubricants.
Liquid or Vapor Injection
The low temperature models are provided with an injection port that can be used for either liquid or vapor injection. Schematics are shown in Figures 2 and 3.
The requirements are outlined below:
• Capillary Tube - Liquid must be fed through an appropriately sized capillary tube as defined in
Table 2. The vapor injection method, in addition to the capillary tube, will require an external heat exchanger (Refer to Figure 3).
• Solenoid Valve - A solenoid valve with a minimum
.109 inch orifice must be provided in the injection circuit that opens whenever the compressor is operative or cooling is required during pumpdown.
The solenoid must be closed when the compressor is cycled off. Failure to provide the solenoid valve can result in liquid refrigerant completely filling the
Scroll during an “off-cycle". If power is reapplied in this condition, the hydraulic effect produced could result in pressure high enough to cause permanent damage to the compressor. Due to this, it is a condition of warranty that the capillary tube and solenoid valve, properly installed, be provided whenever liquid or vapor injection is used.
The following components are not required, but they are recommended for liquid injection.
• Sight Glass - A sight glass should be installed just before the capillary tube inlet to allow visual inspection for the presence of liquid refrigerant.
AE4-1302 R9
• Filter/Drier - A filter/drier should be installed in the injection circuit to avoid the possibility of capillary tube blockage due to contaminants.
Figures 2 and 3 are a representation of typical systems depicting the location of these components.
The advantage of this type of injection system is that it tends to self-regulate i.e., as the pressure differential across the capillary tube increases, the amount of liquid fed to the compressor also increases. Since more cooling is needed at high compression ratio conditions, this "automatic" increase in liquid feed is exactly what is needed.
For the liquid injection system to be effective, a minmum of 5 °F subcooled liquid at the capillary inlet is required. However, do not use mechanically cooled liquid refrigerant, such as found on supermarket rack applications. The cap tube will be oversized and may result in feeding too much refrigerant into the scrolls.
This condition can dilute the oil in the crankcase and cause lubrication issues.
Accumulators
Due to our Copeland Scroll compressor's inherent ability to handle liquid refrigerant in flooded start and defrost operation conditions, accumulators may not be required. An accumulator is required on single compressor systems with charges over 17 lbs. On systems with defrost schemes or transient operations that allow prolonged, uncontrolled liquid return to the compressor, an accumulator is required unless a suction header of sufficient volume to prevent liquid migration to the compressor is used.
Superheat Requirements
In order to assure that liquid refrigerant does not return to the compressor during the running cycle, attention must be given to maintaining proper superheat at the compressor suction inlet. Emerson recommends a minimum of 20°F (11°C) superheat, measured on the suction line 6 inches (152mm) from the suction valve, to prevent liquid refrigerant floodback.
Another method to determine if liquid refrigerant is returning to the compressor is to accurately measure the temperature difference between the compressor oil crankcase and the suction line. During continuous operation we recommend that this difference be a minimum of 50°F (27°C). This “crankcase differential temperature” requirement supersedes the minimum suction superheat requirement in the last paragraph.
To measure oil temperature through the compressor
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4 4
shell, place a thermocouple on the bottom center (not the side) of the compressor shell and insulate from the ambient.
During rapid system changes, such as defrost or ice harvest cycles, this temperature difference may drop rapidly for a short period of time. When the crankcase temperature difference falls below the recommended 50°F (27°C), our recommendation is the duration should not exceed a maximum (continuous) time period of two minutes and should not go lower than a
25°F (14°C) difference.
Contact your Emerson Climate Technologies representative regarding any exceptions to the above requirements.
Crankcase Heat
Crankcase heaters* are required, on outdoor systems, when the system charge exceeds 17 lbs.
*The above listed crankcase heaters are intended for use only where there is limited access. The heaters are not equipped for use with electrical conduit. Where applicable electrical safety codes require heater lead protection, a crankcase heater terminal box should be used. Recommended crankcase heater terminal cover and box numbers are listed in Table 3B. If there are any questions concerning their application, contact the
Emerson Climate Technologies Application Engineering
Department.
Discharge Line Thermostat
A discharge line thermostat is not required on these models. The compressor features an internal temperature sensor which works in conjunction with the protection module and will shut the compressor off if high discharge temperatures exist.
Pressure Controls
Both high and low pressure controls are required. See
Table 4 for the minimum and maximum set points.
IPR Valve
There is no internal pressure relief valve in these larger horsepower scrolls. Therefore a high pressure control located prior to any shut-off valves is mandatory. There is an access port located on the compressor discharge
Rotalock fitting to accommodate this control.
Motor Protection
There are five PTC (Positive Temperature Coefficient) internal thermistors connected in series that react with avalanching resistance in the event of high temperatures.
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AE4-1302 R9
Four of the thermistors are used to sense motor temperatures, and the fifth is used as a discharge temperature sensor. The thermistor circuit is connected to the protector module terminals S1 and S2.
When any thermistor reaches a limiting value, the module interrupts the control circuit and shuts off the compressor. After the thermistor has cooled sufficiently, it will reset. However, the module has a 30 minute time delay before reset after a thermistor trip.
Programmable Logic Controller Requirements
If the INT69SCY (071-0597-00) module is applied in conjunction with a Programmable Logic Controller, it is important that a minimum load is carried through the
M1-M2 control circuit contacts.
The minimum required current through the module relay contacts needs to be greater than 100 milliamps but not to exceed 5 amps. If this minimum current is not maintained, this has a detrimental effect upon the long-term contact resistance of the relay and may result in false compressor trips.
PLC operated control circuits may not always provide this minimum current. In these cases modifications to the
PLC control circuit are required. Consult your Application
Engineering Department for details.
Phase Protection
The INT69-SCY module provides phase protection for the compressor. The module senses the correct phase sequence, phase loss and voltage sag for each leg (L1, L2 and L3) of the incoming power supplied to the compressor. At installation the three phases of the power supply must be wired in the correct 120° phase sequence. This will ensure the compressor will start and operate in the correct clockwise direction.
The INT69-SCY module trips (M1-M2 contacts open) when the module senses a phase loss. There is a 5 minute time delay before the module attempts a restart.
If all three phases are present, then the module will reset
(M1-M2 contacts will close) and the compressor will start and run. If not, the module will attempt a restart after another 5 minute time delay. After 10 failed attempts to restart, the module will lock-out (M1-M2 contacts will remain open) and can only be reset by removing the power from T1-T2 for a minimum of 5 seconds.
The INT69SCY is intended to protect the compressor.
The L1/L2/L3 and S1/S2 leads are pre-wired on the compressor and are engineered to work in conjunction with the motor protector module. The module leads should not be moved or extended because of the
possibility of inducing electronic noise into the INT69SCY, which could cause false trips of the module.
Refer to Figure 4 for wiring schematic details. Also, see the module and sensor functional check section for proper operation procedures.
Module and Sensor Functional Check
The following field troubleshooting procedure can be used to evaluate the solid state control circuit:
Refer to
Table 5 for a technical data summary.
Module Voltage Supply Troubleshooting
• Verify that all wire connectors are maintaining a good mechanical connection. Replace any connectors that are loose.
• Measure the voltage across T1-T2 to ensure proper supply voltage.
• Determine the control voltage by using a voltmeter and then measure the voltage across the M1-M2 contacts: a) If the measured voltage is equal to the control volts then the M1-M2 contacts are open. b) If the measurement is less than 1 volt and the compressor is not running, then the problem is external to the INT69-SCY module. c) If the voltage is greater than 1 volt but less than the control voltage, the module is faulty and should be replaced.
Sensor Troubleshooting
• Remove the leads from S1-S2, and then by using an ohmmeter measure the resistance of the incoming leads.
CAUTION: Use an Ohmmeter with a maximum of 9 VDC for checking – do not attempt to check continuity through the sensors with any other type of instrument. Any external voltage or current may cause damage requiring compressor replacement.
a) During normal operation, this resistance value should read less than 4500 ohms ±20%.
b) If the M1-M2 contacts are open, the measured
S1-S2 value is above 2750 ohms ±20% and the compressor has been tripped less then 30 minutes then the module is functioning properly.
AE4-1302 R9
• If the S1-S2 wire leads read less than 2750 ohms
±20% and the M1-M2 contacts are open, reset the module by removing the power to T1-T2 for a minimum of 5 seconds.
• Replace all wire leads and use a voltmeter to verify the M1-M2 contacts are closed.
• If the M1-M2 contacts remain open and S1-S2 are less than 2500 ohms, remove leads from the M1-
M2 contacts and jumper together;
CAUTION
Compressor should start at this time. HOWEVER
DO NOT LEAVE JUMPER IN PLACE FOR NORMAL
SYSTEM OPERATIONS. THE JUMPER IS USED
FOR DIAGNOSTIC PURPOSES ONLY.
• See Compressor Supply Voltage Troubleshooting.
Compressor Voltage Supply Troubleshooting
• Remove phase sensing leads from the module from
L1/L2/L3.
WARNING
• Use a voltmeter to measure the incoming 3 phase voltage on L1/L2/L3.
WARNING: L1/L2/L3 could
be at a potential up to 600VAC.
• Ensure proper voltage on each phase.
• Remove power to the module for a minimum of 5 seconds to reset and replace all wire leads. Reenergize the module. If the M1-M2 contacts are open with proper voltage to T1-T2, L1/L2/L3 and proper resistance to S1-S2 then the module is faulty and should be replaced.
Oil Type
Polyol ester lubricant (POE) must be provided if the
Copeland Scroll is to be used with HFC refrigerants.
Copeland
™
Ultra 22 CC™, Mobil EAL Arctic 22 CC, or
ICI EMKARATE RL 32CF are the only polyol ester oils approved by Emerson Climate Technologies at this time.
The factory oil charge for all 7.5-15 HP. models is 140 ounces. Field recharge is 135 ounces.
Note: Do not add mineral oil to compressors charged with POE oil intended for use with HFC refrigerants.
Use only the Emerson approved POE lubricants for these applications.
© 2014 Emerson Climate Technologies, Inc.
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CAUTION
POE must be handled carefully and the proper protective equipment (gloves, eye protection, etc.) must be used when handling POE lubricant. POE must not come into contact with any surface or material that might be harmed by POE, including without limitation, certain polymers (e.g. PVC/CPVC and polycarbonate).
Oil Management for Rack Applications
Copeland
™
refrigeration scrolls may be used on multiple compressor parallel rack applications. This requires the use of an oil management system to maintain proper oil level in each compressor crankcase. The sight glass connection supplied can accommodate the mounting of the oil control devices.
Unlike Semi-Hermetic compressors, Scrolls do not have an oil pump with accompanying oil pressure safety controls. Therefore, an external oil level control is required.
The OMB Oil Level Management Control combines the functions of level control and timed compressor shut-off should the level not come back to normal within a set period of time. This device has been found to provide excellent performance in field tests on Scroll compressors and is recommended for parallel system applications.
Refer to
Figure 5.
Immediately after system start-up the oil reservoir level will fluctuate until equilibrium is reached. It is advisable to monitor the oil level during this time to assure sufficient oil is available. This will prevent unnecessary trips of the oil control system.
Note: If oil management problems are occuring please refer to AE 17-1320 or contact the Emerson
Climate Technologies Application Engineering
Department.
Note: ZB50, 58, 66, 76, 88 are not approved for rack
applications due to compressor limitations.
Discharge Mufflers
Gas flow through scroll compressors is continuous with relatively low pulsation. External mufflers applied to piston compressors will probably not be required on
Copeland Scrolls. Due to system variability individual tests should be conducted by the system manufacturer to verify acceptable levels of sound and vibration.
AE4-1302 R9
Compressor Mounting
Compressor mounting must be selected based on application. Consideration must be given to sound reduction and tubing reliability. Some tubing geometry or “shock loops” may be required to reduce vibration transferred from the compressor to external tubing.
Mounting for Rack Systems - Specially designed steel spacers and rubber isolator pads are available for
Copeland Scroll 7.5-15 H.P. scroll rack applications. This mounting arrangement limits the compressors motion thereby minimizing potential problems of excessive tubing stress. Sufficient isolation is provided to prevent vibration from being transmitted to the mounting structure. This mounting arrangement is recommended for multiple compressor rack installations. See
Figure
6A for a detail of this mounting system.
Note: The use of standard soft grommets is not recommended for Copeland Scroll rack installations.
These “softer” mounts allow for excessive movement that will result in tube breakage unless the entire system is properly designed.
Condensing Units- For 7.5-15 H.P. Copeland
Scroll condensing unit applications soft mounts are recommended. See
Figure 6B.
Tubing Considerations - Proper tube design must be taken into consideration when designing the tubing connecting the scroll to the remaining system. The tubing should provide enough “flexibility” to allow normal starting and stopping of the compressor without exerting excessive stress on the tube joints.
In addition, it is desirable to design tubing with a natural frequency away from the normal running frequency of the compressor. Failure to do this can result in tube resonance and unacceptable tubing life.
Figures 7A and 7B are examples of acceptable tubing configurations.
CAUTION
These examples are intended only as guidelines to depict the need for flexibility in tube designs. In order to properly determine if a design is appropriate for a given application, samples should be tested and evaluated for stress under various conditions of use including voltage, frequency, and load fluctuations, and shipping vibration. The guidelines above may be helpful; however, testing should be performed for each system designed.
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Connection Fittings
Larger horsepower Copelnd Scroll compressors are supplied with Rotalock adapter spuds welded on the shell. The fitting sizes for 7.5 through 15 H.P. scrolls are as follows:
7.5 through 13 Horsepower
Suction Rotolock Spud Connection 1 3/4-12
Discharge Rotolock Spud Connection 1 1/4-12
15 Horsepower
Suction Rotolock Spud Connection 2 1/4-12
Discharge Rotolock Spud Connection 1 3/4-12
Low temperature “ZF” models are also equipped with a
1/4 inch I.D. injection port. This fitting is a copper plated steel connection. Brazing procedures for this type of fitting is inherently different than brazing pure copper fittings.
See the section on Field Service in the AE4-1299 for suggestions on how to properly make this connection.
Three Phase Scroll Compressors — Directional
Dependence
Scroll compressors are directional dependent; i.e. they will compress in one rotational direction only. Three phase scrolls will rotate in either direction depending on power phasing. Since there is a 50/50 chance of connected power being “backwards”, contractors should be warned of this. Appropriate instructions or notices should be provided by the OEM. To eliminate the possibility of reverse rotation a Copeland Phase
Control line monitor, P/N 085-0160-00, or other phase monitor is recommended on installations not using the phase sensing module. However, our newer modules will prevent operation in the wrong direction. Refer to
Table 5 for module features.
Verification of proper rotation can be made by observing that the suction pressure drops and the discharge pressure rises when the compressor is energized.
Additionally, if operated in reverse the compressor is noisier and its current draw is substantially reduced compared to tabulated values.
No time delay is required on three phase models to prevent reverse rotation due to brief power interruptions.
Deep Vacuum Operation
WARNING
Do not run a Copeland Scroll compressor in a deep vacuum. Failure to heed this advice can result in arcing of the Fusite pins and permanent damage to the compressor.
AE4-1302 R9
A low pressure control is required for protection against deep vacuum operation. See Pressure Control section for proper set points.
(Table 4)
Scroll compressors (as with any refrigerant compressor) should never be used to evacuate a refrigeration or air conditioning system. See
AE24-1105 for proper system evacuation procedures.
Unbrazing System Components
If the refrigerant charge is removed from a Scroll unit by bleeding the high side only, it is sometimes possible for the scrolls to seal, preventing pressure equalization through the compressor. This may leave the low side shell and suction line tubing pressurized. If a brazing torch is then applied to the low side, the pressurized refrigerant and oil mixture could ignite as it escapes and contacts the brazing flame. It is important to check both the high and low sides with manifold gauges before unbrazing or in the case of assembly line repair, remove refrigerant from both the high and low sides. Instructions should be provided in appropriate product literature and assembly
(line repair) areas.
High Potential (Hipot) Testing
Many of the Copeland brand compressors are configured with the motor below the compressor. As a result when liquid refrigerant is within the compressor shell the motor can be immersed in liquid refrigerant to a greater extent than with compressors with the motor mounted above the compressor. When Copeland brand compressors are
Hipot tested and liquid refrigerant is in the shell, they can show higher levels of leakage current than compressors with the motor on top because of the higher electrical conductivity of liquid refrigerant than refrigerant vapor and oil. This phenomenon can occur with any compressor when the motor is immersed in refrigerant. The level of current leakage does not present any safety issue. To lower the current leakage reading the system should be operated for a brief period of time to redistribute the refrigerant to a more normal configuration and the system
Hipot tested again. See bulletin
AE4-1294 for Megohm testing recommendations. Under no circumstances should the Hipot or Megohm test be performed while the compressor is under a vacuum.
Note: The solid state electronic module components and internal sensors are delicate and can be damaged by exposure to high voltage. Under no circumstances should a high potential test be made at the sensor terminals or sensor leads connected to the module. Damage to the sensors or module may result.
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Copeland Scroll Functional Check
Copeland Scroll compressors do not have internal suction valves. It is not necessary to perform functional compressor tests to check how the compressor will pull suction pressure. This type of test may damage a
Scroll compressor. The following diagnostic procedure should be used to evaluate whether a Copeland Scroll compressor is functioning properly.
1. Verify proper unit voltage.
2. Normal motor winding continuity and short to ground checks can be used to determine proper motor resistance or if an internal short to ground has developed.
3. With service gauges connected to the suction and discharge pressure fittings, turn on the compressor.
If suction pressure falls below normal levels the system is either low on charge or there is a flow blockage.
4. If the suction pressure does not drop and the discharge pressure does not rise, reverse any two of the compressor power leads and reapply power to verify the compressor was not wired to run in the reverse direction.
The operational compressor current draw should be compared to published performance curves at the operating conditions (pressures and voltages).
Significant deviation (± 15%) from published values may indicate a faulty compressor.
AE4-1302 R9
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AE4-1302 R9
Figure 1A
ZF**K4 Envelope (R-22)
Conditions: 65°F Return Gas;
0°F Subcooling; 95°F Ambient
Note: The ZF can operate as a ZS by capping the injection port.
Figure 1B
ZF**K4E Envelope (R-404A/R-507)
Conditions: 65°F Return Gas;
0°F Subcooling; 95°F Ambient
Figure 1C
ZS**K4E Envelope (R-404A/R-507)
Conditions: 65°F Return Gas;
0°F Subcooling; 95°F Ambient
Figure 1D
ZS**K4/K4E Envelope (R-22)
Conditions: 65°F Return Gas
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10
AE4-1302 R9
Figure 2 – Copeland Scroll K4 Liquid Injection*
Figure 3 – Copeland Scroll K4 Vapor Injection*
L1
Motor Overload Protector
T1 T2
Discharge
Pressure
Switch
Suction
Pressure
Switch
Oil Control
OMB Oil
Level
Control
Thermostat
M1
M2
S1 S2
(To Motor Overload Sensors)
(To Compressor Terminal Block)
(To 24 VAC Supply)
Figure 4 – Scroll Wiring Schematic
L2
Compressor
Contactor
Coil
C
Liquid/Vapor
Injection
Solenoid
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FEATURES
• Self contained unit with oil level sensor and integral solenoid to manage oil level supply
• Hall-effect sensor for precise measurement of oil level
• Alarm and status indication by LEDs
• SPDT output contact for compressor shutdown or alarming
• Easy installation by sightglass replacement
• Adapters suitable for various types of compressors including conventional and scroll compressors
• Signal generated by gravity based fl oatnot prone to errors from foaming like optical sensors
• Sacrifi cial magnet for reliable operation
SAFETY INSTRUCTIONS
WARNING
: Before opening any system, make sure the pressure in the system is brought to and remains at atmospheric pressure. Failure to comply can result in personal injury and/or system damage.
1. Read installation instructions thoroughly. Failure to follow instructions may result in product failure, system damage, or personal injury.
2. Do not open system under pressure.
3. Ensure supply voltage is within specifi ed OMB limits.
4. Disconnect supply voltage from system/OMB before installation/ service. Comply with local electrical regulations when wiring OMB.
5. Do not exceed maximum working pressure.
6. Keep temperature within nominal limits.
7. Work should be performed by qualifi ed service personnel or a licensed contractor
SPECIFICATIONS
Maximum Working Pressure: 500 psig
Solenoid MOPD:
Supply Voltage:
Solenoid Coil:
A S C 2 L
50/60 Hz
Current Consumption:
Time Delay for Low Level
Signal:
Time Delay After Setpoint
Recovery:
Alarm Delay Time:
(including alarm contact)
Alarm Switch:
SPDT
Alarm Contact Rating:
350 psig
24 VAC,
5 0 / 6 0 H z
2 4 V A C ,
0.6A
10 seconds
5 seconds
120 seconds
10A-125V,
5 A 2 5 0 V
Refrigerant Compatibility: HFC, HCFC,
(not for use with fl ammable CFC refrigerants or ammonia)
Refrigerant Temperature: -40°F TO
1 8 0 ° F
Storage and Ambient Temp.: -40°F TO
1 2 0 ° F
Ambient Temp. (Housing): -40°F TO
1 2 0 ° F
Oil Supply fi tting:
Compressor Adapter:
¼ Male SAE
See Table 1
TABLE 1
Mounting Adapter Kit Applications
Adapter Kit
ACA
Compressor Type
Copeland Glaciers,
ZF, ZS, ZB
AE4-1302 R9
INSTALLATION INSTRUCTIONS
1. Read installation instructions thoroughly.
2. Assure that you have the appropriate mounting adapter kit for the compressor.
See Table 1. For semi-hermetic compressors see steps 1A through 5A below. For Copeland compressors using adapter kit ACA see steps 1B through 6B.
For Copeland compressors using adapter kit ACB see steps 1C through 6C.
1B. Assure there is no pressure in the compressor crankcase and unscrew the ¾ pipe thread attaching the original sight glass to the compressor. Take note of the original oil level since oil may be lost when the sight glass is removed. Tip the compressor to avoid oil loss if possible.
2B. Using PTFE tape as a sealant, thread the adapter into the compressor with the three hole fl ange installed on the adapter to capture in the assembly. The chamfered side of the threaded bolt holes should face outward. Torque the pipe thread to 30-40 ft.lbs. Take care not to scratch the o-ring seal surface of the adapter.
3B. Using the O-ring and bolts provided, install the control unit to the adapter fl ange.
The top of the control unit must be perfectly horizontal with the oil inlet fi tting to the left.
Torque the bolts to 120 in.-lbs.
4B. Connect the oil supply line to the ¼ inch male fl are fi tting. A clean-able strainer is incorporated into the fi tting.
5B. Make wiring connections in accordance with Figure 1. Important: The screw clamp style connector plugs used for the power supply and solenoid coil must be unplugged from the circuit board to gain access to the wire clamp screws. Use a small screwdriver to pry them outward.
6B. Assure there is a proper oil level in the crankcase.
Figure 5
OMB Electronic Oil Level Management System Installation and Service Instructions
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102-0119-00
WASHER
AE4-1302 R9
030-0142-00
SLEEVE
027-0137-00
RUBBER SPACER
102-0008-21
WASHER
027-0115-00
RUBBER PAD
KIT #527-0158-00
027-0280-00
STEEL SPACER
Figure 6A
7.5 - 15 HP Copeland Scroll Rack Mounting
KIT #527-0159-00
027-0268-00
RUBBER GROMMET
COMPRESSOR
MOUNTING
Figure 6B
7.5 - 15 HP Copeland Scoll Condensing Unit
Mounting
Figure 7A
Typical Suction Tubing
Figure 7B
Typical Injection Tubing
Notes:
(1) The above tubing configurations are guidelines to minimize tube stress.
(2) Follow similar guidelines for discharge tubing and oil return tubing as needed.
(3) If a run over 30” is required, intermediate clamps may be necessary.
(4) Do not hang weights on tubing (e.g. filter drier on suction tubing) except after clamps or close to the header.
(5) Tube runs of less than 12” are not recommended.
(6) This dimension should be made as short as possible but still insuring a proper braze joint.
(7) The above tubing recommendations are based on “no elbow joints”. The use of continuous tubing is preferred.
© 2014 Emerson Climate Technologies, Inc.
Printed in the U.S.A.
13
AE4-1302 R9
Table 1 – Refrigerants and Lubricants
Model
ZF, ZS
ZF, ZS
Refrigerant
R22
R-404A,
R-507, R-22
Lubricant
MO
POE
Table 2
Capillary Tubes for Liquid or Vapor Injection
Model
ZF24K4
ZF33K4
ZF40K4
ZF48K4
ZF24K4E
ZF33K4E
ZF40K4E
ZF48K4E
Cap Tube
I.D.
(inches)
Length
(inches)
R-22
5" 0.05
0.05
0.07
0.07
5"
30"
10"
0.05
R-404A/R-507
30"
0.05
0.07
0.07
17.5"
30"
30"
Emerson Kit
Number
998-1586-00
998-1586-00
998-1586-05
998-1586-06
998-1586-04
998-1586-01
998-1586-05
998-1586-05
Part No.
018-0036-01
018-0036-00
018-0036-02
018-0036-03
Table 3A
External Wrap-Around
Crankcase Heater Numbers*
Volts
120
240
480
575
Watts
70
70
70
60
Lead
Lengths
(in)
21
21
21
21
Ground
Wire
Lengths
(in)
29
29
29
29
Conduit Ready Terminal Box Numbers
Model
7.5-15 H. P.
7.5-15 H.P.
Table 3B
Item
Cover
Box
Part Number
005-7061-00
062-7015-00
Table 4 – Pressure Control Settings
Medium Temp.
(ZF)
Medium Temp.
(ZS)
Low Temp.
(ZF)
Low
High
Low
High
Low
High
R-404A/
R-507
8 PSIG Min.
R-22
10 PSIG Min.
445 PSIG Max.
381 PSIG Max.
8 PSIG Min.
24 PSIG Min.
445 PSIG Max.
381 PSIG Max.
0 PSIG Min.
2 in. Hg Min.
400 PSIG Max.
335 PSIG Max.
© 2014 Emerson Climate Technologies, Inc.
Printed in the U.S.A.
14
AE4-1302 R9
Emerson P/N
Manufacture P/N
T1-T2 Module Power
Voltage Supply
Frequency
120V & 240V
50Hz 60 Hz
M1-M2 Module Output Contacts
Maximum Voltage
Maximum Current
Minimum Current
Relay Output
Power Output
N/A
5 Amps
100 milliamps
2.5 A, 600 V
< 5.5 VA
S1-S2 Thermal Protection
Trip Out Resistance
Reset Resistance
Reset Time
Manual Reset
N/A
N/A
30 min ± 5 min.
T1-T2 interrupt for minimum of 5 sec
L1-L2-L3 Phase Monitoring
Phase Sensor
Phase Monitoring
Circuit Rating
Trip Delay
Lockout
Reset for Lockout
071-0520-07
T.I. 30AA201E
Non Phase Sensing
Non Phase Sensing
Non Phase Sensing
Non Phase Sensing
Non Phase Sensing
Table 5
Technical Data Summary
071-0520-05
Kriwan 69SC-DV
120V & 240V
50Hz 60 Hz
250VAC
5 Amps
100 milliamps
5 A, 300 VA
< 3 VA
4500/ ± 20%
2750/ ± 20%
30 min ± 5 min.
T1-T2 interrupt for minimum of 5 sec
Non Phase Sensing
Non Phase Sensing
Non Phase Sensing
Non Phase Sensing
Non Phase Sensing
071-0597-00
Kriwan 69SCY
120V & 240V
50Hz 60 Hz
250VAC
5 Amps
100 milliamps
5 A, 300 VA
< 3 VA
4500/ ± 20%
2750/ ± 20%
30 min ± 5 min.
T1-T2 interrupt for minimum of 5 sec
3
3 AC 50/60Hz 120V to 632V
5 min delay before restart attempt
After 10 module trips
T1-T2 interrupt for minimum of 5 sec
The contents of this publication are presented for informational purposes only and are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. Emerson Climate Technologies, Inc. and/or its affiliates (collectively "Emerson"), as applicable, reserve the right to modify the design or specifications of such products at any time without notice. Emerson does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson product remains solely with the purchaser or end user.
© 2014 Emerson Climate Technologies, Inc.
Printed in the U.S.A.
15
