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H-IM-SCU
Screw Compressor Condensing Units
Table of Contents
General Safety Information .............................................2
Inspection .......................................................................2
Warranty Statement ........................................................2
Space and Location Requirements ................................3
Condensing Unit Rigging and Mounting .........................4
Head Pressure Control ....................................................4
Refrigerant Oils ...............................................................4
Recommended Refrigerant Piping Practices ..................5
Refrigeration Pipe Supports ...........................................5
Suction Lines ..................................................................6
Liquid Lines ....................................................................6
Unit Cooler Piping ...........................................................6
Line Sizing Tables ....................................................... 7-9
Evacuation and Leak Detection ....................................10
Operations Manual
October 2015
Refrigerant Charging Instructions.................................10
Field Wiring ...................................................................10
Check Out and Start Up ................................................11
Operational Check Out ..................................................11
System Balancing-Compressor Superheat ...................11
General Sequence of Operation .............................. 12-17
System Troubleshooting Guide .....................................18
Magnum Alarm and Safeties ........................................20
Magnum System Alarms ...............................................21
Setpoint Safety Alarms ........................................... 21-22
Preventive Maintenance Guidelines .............................23
Typical Wiring Diagrams ...............................................24
InterLink™ Replacement Parts ....................................26
Installation and
Part No. 25008501
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Summary of Contents for Heatcraft H-IM-SCU
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Page 1: Table Of Contents
Installation and Operations Manual H-IM-SCU October 2015 Part No. 25008501 Screw Compressor Condensing Units Table of Contents General Safety Information ..........2 Refrigerant Charging Instructions.........10 Inspection ...............2 Field Wiring ..............10 Warranty Statement ............2 Check Out and Start Up ..........11 Space and Location Requirements ........3 Operational Check Out ..........11... -
Page 2: General Safety Information
Warranty Statement purchaser must submit a proof-of-purchase of a compressor and supply it to Heatcraft Refrigeration Products Warranty Claims for reimbursement. Seller warrants to its direct purchasers that products, including Service Parts, manufactured by SELLER shall be of a merchantable quality, free of defects in Seller makes no express warranties except as noted above. -
Page 3: Space And Location Requirements
Fences must have 50% free area, with 1 foot undercut, a “W” minimum clearance, and must not exceed the top ofunit. If these requirements are not met, unit must be installed as indicated for “Units in pits". © 2015 Heatcraft Refrigeration Products, LLC... -
Page 4: Condensing Unit Rigging And Mounting
The receiver discharge is regulated by the ORI valve. AIR COOLED CONDENSER DRAIN REGULATOR BYPASS REGULATOR CHECK VALVE STD. LIQUID LINE OUTLET RECEIVER DIP TUBE DISCHARGE LINE COMPRESSOR © 2015 Heatcraft Refrigeration Products, LLC... -
Page 5: Recommended Refrigerant Piping Practices
Figure 10. Condensing Unit / Compressor to Wall Support Recommended Refrigerant Piping Practices The system as supplied by Heatcraft Refrigeration Products, was thoroughly cleaned and dehydrated at the factory. Foreign matter may enter the system by way of the evaporator to condensing unit piping. Therefore, care must be used during installation of the piping to prevent entrance of foreign matter. -
Page 6: Suction Lines
136 feet • (5) additional 90° elbows to first evaporator. • (4) additional 90° elbows to second evaporator. 5. Table 8 indicates 1-5/8" suction line and 1-1/8" liquid line from main line to both evaporators. © 2015 Heatcraft Refrigeration Products, LLC... -
Page 7: Line Sizing Tables
Copper Tube, O.D., Type “L” 1-1/8 1-3/8 1-5/8 2-1/8 2-5/8 3-1/8 3-5/8 4-1/8 5-1/8 6-1/8 Globe Valve (Open) Angle Valve (Open) 90˚ Turn Through Tee Tee (Straight Through) or Sweep Below 90˚ Elbow or Reducing Tee (Straight Through) © 2015 Heatcraft Refrigeration Products, LLC... - Page 8 2. Suction line sizes selected at pressure drop equivalent to 2˚F. Reduce estimate of system capacity accordingly. 3. If system load drops below 40% of design, consideration to installing double suction risers should be made. © 2015 Heatcraft Refrigeration Products, LLC...
- Page 9 2. Suction line sizes selected at pressure drop equivalent to 2˚F. Reduce estimate of system capacity accordingly. 3. If system load drops below 40% of design, consideration to installing double suction risers should be made. © 2015 Heatcraft Refrigeration Products, LLC...
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Page 10: Evacuation And Leak Detection
Repeat this operation a second time. Open the compressor service valves and evacuate the entire system to 500 microns absolute pressure. Raise the pressure to 2 psig with the refrigerant and remove the vacuum pump. © 2015 Heatcraft Refrigeration Products, LLC... -
Page 11: Check Out And Start Up
7. Check drain pan for proper drainage. 8. Check winter head pressure controls for pressure setting. 9. Check oil sump heater operation 10. Install instruction card and control system diagram for use of building manager or owner. © 2015 Heatcraft Refrigeration Products, LLC... -
Page 12: General Sequence Of Operation
© 2015 Heatcraft Refrigeration Products, LLC ... - Page 13 Low & Unsafe Differential Oil Pressure c. Low & High Discharge Pressure d. High Discharge, Oil and Motor Temperatures e. Low & High Motor Ampere f. No Compressor Proof g. Freeze protection for split barrels units © 2015 Heatcraft Refrigeration Products, LLC...
- Page 14 Pressing the Page Down button shows the next Circuit Status screen: Pressing the Page Down button shows the next Circuit Status screen: ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION © 2015 Heatcraft Refrigeration Products, LLC...
- Page 15 4 Sensor Outputs: ACTUAL DISPLAY ACTUAL DISPLAY DESCRIPTION DESCRIPTION ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY ACTUAL DISPLAY DESCRIPTION DESCRIPTION ACTUAL DISPLAY ACTUAL DISPLAY DESCRIPTION DESCRIPTION ACTUAL DISPLAY DESCRIPTION © 2015 Heatcraft Refrigeration Products, LLC...
- Page 16 Setpoints Menu Selecting the 'Setpoints' menu option shows the first 4 setpoints: Selecting the option shows the first 4 Setpoints: ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION © 2015 Heatcraft Refrigeration Products, LLC...
- Page 17 Lockout RST Menu Selecting the option shows the following: Selecting the 'Lckout RST' menu option shows the following: Selecting the 'Lckout RST' menu option shows the following: DESCRIPTION ACTUAL DISPLAY ACTUAL DISPLAY DESCRIPTION ACTUAL DISPLAY DESCRIPTION © 2015 Heatcraft Refrigeration Products, LLC...
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Page 18: System Troubleshooting Guide
1. Add components to bring conditions within acceptable limits (i.e., CPR/EPR protector switch open valves, additional condenser surface, liquid injection, etc.). 2. Dirty condenser coil. 3. Overcharged system. 2. Open valve. 3. Clean coil. 4. Reduce charge. © 2015 Heatcraft Refrigeration Products, LLC... - Page 19 • Press SERVICE DIAGNOSTICS until the auth. option appears Press the • ENTER key • From the 'Display Status' menu press keys corresponding to your authorization • Press ENTER © 2015 Heatcraft Refrigeration Products, LLC...
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Page 20: Magnum Alarm And Safeties
The following alarms indicate an action that the Magnum made automatically: • ROTATED LEAD- Generated when the Magnum automatically rotates the Lead Compressor. • DAYLIGHT SAVINGS – Generated when the Magnum automatically changes the real time clock to adjust for Daylight Savings Time. © 2015 Heatcraft Refrigeration Products, LLC... -
Page 21: Magnum System Alarms
Magnum will wait for 2 seconds before the Lock Out occurs. The alarm will be PHASE LOSS and no restart will be attempted. If setpoint #166 is active, the name of the setpoint will be in the message. Refer to section 13 setpoint #166. © 2015 Heatcraft Refrigeration Products, LLC... - Page 22 Temperature>100 or < -20 40034 Suction Temperature>100 or < -30 40036 Discharge Temperature>110 or < -30 40046 Leaving Water Temperature>100 or < -20 40031 Suction Pressure>1200 or < -30 40033 Discharge Pressure>3500 or < -30 © 2015 Heatcraft Refrigeration Products, LLC...
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Page 23: Preventive Maintenance Guidelines
• Check for unusual noise or vibration. Take corrective action as required. • Inspect wiring for signs of wear or discoloration and repair if needed. • Check and tighten all flare connections. © 2015 Heatcraft Refrigeration Products, LLC... -
Page 24: Typical Wiring Diagrams
AND IS SUPPLIED ONLY ON A PROPRIETY BASIS. NO TRANSMITTAL SHALL BE MADE TO ANY PERSON, FIRM, OR TYPICAL MICRO CONTROLS CORPORATION WITHOUT PRIOR WRITTEN APPROVAL. DRAWN DATE REF NO. CHECKED DATE DWG. NO. DATE REV. REV. © 2015 Heatcraft Refrigeration Products, LLC... - Page 25 _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ ______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ © 2015 Heatcraft Refrigeration Products, LLC...
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Page 26: Interlink™ Replacement Parts
The original invoice from the parts supplier must accompany all warranty claims for replacement part reimbursement. Heatcraft Refrigeration Products reserves the right to adjust the compensation amount paid on any parts submitted for warranty reimbursement when a parts supplier's original invoice is not provided with a claim.
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