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Heatcraft Refrigeration Products Condensing Units H-IM-CU Installating And Operation Manual Download Page 13

1

Table 8. Recommended Line Sizes for R-0A and R507*

Capacity 

BTUH

 Suction Line Size

Liquid Line Size

Suction Temperature

Receiver to 

Expansion Valve 

Equivalent 

Lengths

+20˚F  

Equivalent Lengths

+10˚F 

Equivalent Lengths

 -10˚F  

Equivalent Lengths

-20˚F 

Equivalent Lengths

-0˚F 

Equivalent Lengths

-0˚F 

Equivalent Lengths

25' 50' 100' 150' 25' 50' 100' 150' 25' 50' 100' 150' 25' 50' 100' 150' 25' 50' 100' 150' 25' 50' 100' 150' 25' 50' 100' 150'

1,000

3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 1/2 1/2 3/8 3/8 1/2 1/2 3/8 3/8 1/2 1/2 3/8 1/2 1/2 5/8 3/8 3/8 3/8 3/8

3,000

3/8 3/8 1/2 1/2 3/8 1/2 1/2 5/8 1/2 1/2 5/8 5/8 1/2 1/2 5/8 7/8 1/2 1/2 5/8 7/8 1/2 1/2 5/8 7/8 3/8 3/8 3/8 3/8

4,000

3/8 1/2 1/2 5/8 1/2 1/2 5/8 5/8 1/2 5/8 5/8 7/8 1/2 5/8 7/8 7/8 5/8 5/8 7/8 7/8 1/2 5/8 7/8 7/8 3/8 3/8 3/8 3/8

6,000

1/2 1/2 5/8 7/8 1/2 1/2 5/8 7/8 1/2 5/8 7/8 7/8 5/8 5/8 7/8 7/8 5/8 5/8 7/8 7/8 5/8 5/8 7/8 7/8 3/8 3/8 3/8 3/8

9,000

5/8 5/8 7/8 7/8 5/8 5/8 7/8 7/8 5/8 7/8 7/8 7/8 5/8 7/8 7/8 1-

1/8 5/8 7/8 7/8

1-

1/8 5/8 7/8 7/8

1-

1/8 3/8 3/8 3/8 3/8

12,000

5/8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 7/8 7/8 7/8 1-

1/8 7/8 7/8

1-

1/8

1-

1/8 7/8 7/8

1-

1/8

1-

1/8 7/8 7/8

1-

1/8

1-

1/8 3/8 3/8 3/8 3/8

15,000

5/8 7/8 7/8 7/8 7/8 7/8 7/8 1-

1/8 7/8 7/8

1-

1/8

1-

1/8 7/8 7/8

1-

1/8

1-

1/8 7/8 7/8

1-

1/8

1-

1/8 7/8 7/8

1-

1/8

1-

1/8 3/8 3/8 3/8 1/2

18,000

7/8 7/8 7/8 1-

1/8 7/8 7/8

1-

1/8

1-

1/8 7/8 7/8

1-

1/8

1-

1/8 7/8

1-

1/8

1-

1/8

1-

3/8 7/8

1-

1/8

1-

1/8

1-

3/8 7/8

1-

1/8

1-

1/8

1-

3/8 3/8 3/8 1/2 1/2

24,000

7/8 7/8 1-

1/8

1-

1/8 7/8

1-

1/8

1-

1/8

1-

1/8 7/8

1-

1/8

1-

1/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8 3/8 3/8 1/2 1/2

30,000

7/8 7/8 1-

1/8

1-

1/8 7/8

1-

1/8

1-

1/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8 3/8 1/2 1/2 1/2

36,000

7/8 1-

1/8

1-

1/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

3/8

1-

3/8

1-

3/8

1-

1/8

1-

3/8

1-

3/8

1-

5/8 1/2 1/2 1/2 1/2

42,000

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

3/8

1-

3/8

1-

5/8

1-

1/8

1-

3/8

1-

5/8

1-

5/8

1-

1/8

1-

3/8

1-

3/8

1-

5/8

1-

1/8

1-

3/8

1-

3/8

1-

5/8 1/2 1/2 1/2 5/8

48,000

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

1/8

1-

3/8

1-

5/8

1-

1/8

1-

3/8

1-

3/8

1-

5/8

1-

1/8

1-

3/8

1-

5/8

1-

5/8

1-

1/8

1-

3/8

1-

3/8

1-

5/8

1-

1/8

1-

3/8

1-

3/8

1-

5/8 1/2 1/2 5/8 5/8

54,000

1-

1/8

1-

1/8

1-

3/8

1-

3/8

1-

1/8

1-

3/8

1-

3/8

1-

5/8

1-

3/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

3/8

1-

5/8

1-

5/8 1/2 1/2 5/8 5/8

60,000

1-

1/8

1-

1/8

1-

3/8

1-

5/8

1-

1/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

3/8

1-

5/8

1-

5/8 1/2 1/2 5/8 5/8

66,000

1-

1/8

1-

3/8

1-

3/8

1-

5/8

1-

1/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

5/8

1-

5/8

1-

5/8

1-

3/8

1-

5/8

1-

5/8

1-

5/8

1-

3/8

1-

5/8

1-

5/8

1-

5/8

1-

3/8

1-

5/8

1-

5/8

1-

5/8 1/2 1/2 5/8 5/8

72,000

1-

1/8

1-

3/8

1-

5/8

1-

5/8

1-

1/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

5/8

1-

5/8

1-

5/8

1-

3/8

1-

5/8

1-

5/8

1-

5/8

1-

3/8

1-

5/8

1-

5/8

1-

5/8

1-

3/8

1-

5/8

1-

5/8

1-

5/8 1/2 5/8 5/8 5/8

78,000

1-

1/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

5/8

1-

5/8

1-

5/8

1-

5/8

1-

5/8

1-

5/8

2-

1/8

1-

5/8

1-

5/8

1-

5/8

2-

1/8

1-

5/8

1-

5/8

1-

5/8

2-

1/8 5/8 5/8 5/8 5/8

84,000

1-

1/8

1-

3/8

1-

5/8

1-

5/8

1-

3/8

1-

3/8

1-

5/8

2-

1/8

1-

3/8

1-

5/8

1-

5/8

2-

1/8

1-

5/8

1-

5/8

2-

1/8

2-

1/8

1-

5/8

1-

5/8

2-

1/8

2-

1/8

1-

5/8

1-

5/8

2-

1/8

2-

1/8 5/8 5/8 5/8 7/8

90,000

1-

3/8

1-

3/8

1-

5/8

2-

1/8

1-

3/8

1-

5/8

1-

5/8

2-

1/8

1-

5/8

1-

5/8

2-

1/8

2-

1/8

1-

5/8

1-

5/8

2-

1/8

2-

1/8

1-

5/8

2-

1/8

2-

1/8

2-

1/8

1-

5/8

1-

5/8

2-

1/8

2-

1/8 5/8 5/8 7/8 7/8

120,000

1-

3/8

1-

5/8

2-

1/8

2-

1/8

1-

3/8

1-

5/8

2-

1/8

2-

1/8

1-

5/8

2-

1/8

2-

1/8

2-

5/8

1-

5/8

2-

1/8

2-

1/8

2-

5/8

1-

5/8

2-

1/8

2-

1/8

2-

5/8

1-

5/8

2-

1/8

2-

1/8

2-

5/8 5/8 5/8 7/8 7/8

150,000

1-

5/8

1-

5/8

2-

1/8

2-

1/8

1-

5/8

2-

1/8

2-

1/8

2-

1/8

2-

1/8

2-

1/8

2-

5/8

2-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

5/8 5/8 7/8 7/8 7/8

180,000

1-

5/8

2-

1/8

2-

1/8

2-

1/8

1-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

5/8 7/8 7/8 7/8

1-

1/8

210,000

1-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

5/8

2-

1/8

2-

1/8

2-

5/8

3-

1/8

2-

1/8

2-

5/8

2-

5/8

3-

1/8

2-

1/8

2-

5/8

2-

5/8

3-

1/8

2-

1/8

2-

5/8

2-

5/8

3-

1/8 7/8 7/8

1-

1/8

1-

1/8

240,000

1-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

1/8

2-

1/8

2-

5/8

2-

5/8

2-

1/8

2-

5/8

2-

5/8

3-

1/8

2-

1/8

2-

5/8

2-

5/8

3-

1/8

2-

5/8

2-

5/8

3-

1/8

3-

1/8

2-

5/8

2-

5/8

3-

1/8

3-

1/8 7/8 7/8

1-

1/8

1-

1/8

300,000

2-

1/8

2-

1/8

2-

5/8

2-

5/8

2-

1/8

2-

5/8

2-

5/8

3-

1/8

2-

5/8

2-

5/8

3-

1/8

3-

1/8

2-

5/8

2-

5/8

3-

1/8

3-

5/8

2-

5/8

2-

5/8

3-

1/8

3-

5/8

2-

5/8

2-

5/8

3-

5/8

3-

5/8 7/8

1-

1/8

1-

1/8

1-

3/8

360,000

2-

1/8

2-

1/8

2-

5/8

3-

1/8

2-

1/8

2-

5/8

2-

5/8

3-

1/8

2-

5/8

2-

5/8

3-

1/8

3-

5/8

2-

5/8

2-

5/8

3-

5/8

3-

5/8

2-

5/8

3-

1/8

3-

5/8

3-

5/8

2-

5/8

3-

1/8

3-

5/8

4-

1/8

1-

1/8

1-

1/8

1-

3/8

1-

3/8

480,000

2-

1/8

2-

5/8

3-

1/8

3-

1/8

2-

5/8

2-

5/8

2-

5/8

3-

5/8

2-

5/8

3-

1/8

3-

5/8

3-

5/8

2-

5/8

3-

1/8

3-

5/8

3-

5/8

3-

1/8

3-

5/8

4-

1/8

4-

1/8

3-

1/8

3-

5/8

4-

1/8

4-

1/8

1-

1/8

1-

1/8

1-

3/8

1-

5/8

600,000

2-

5/8

2-

5/8

3-

1/8

3-

5/8

2-

5/8

2-

5/8

3-

1/8

3-

5/8

3-

1/8

3-

1/8

3-

5/8

4-

1/8

3-

1/8

3-

1/8

3-

5/8

3-

5/8

3-

1/8

3-

5/8

4-

1/8

4-

1/8

3-

1/8

3-

5/8

4-

1/8

4-

1/8

1-

1/8

1-

3/8

1-

5/8

1-

5/8

* NOTES:

Sizes that are highlighted indicate maximum suction line sizes that should be used for risers.  Riser size should not exceed horizontal size.   

 

 

        Properly placed suction traps must also be used for adequate oil return. 

        All sizes shown are for O.D. Type L copper tubing.

Suction line sizes selected at pressure drop equivalent to 2˚F.  Reduce estimate of system capacity accordingly.
Recommended liquid line size may increase with reverse cycle hot gas systems.
If system load drops below 40% of design, consideration to installing double suction risers should be made.

1.

2.
3.
4.

Summary of Contents for Condensing Units H-IM-CU

Page 1: ...or 8 Recommended Refrigerant Piping Practices 8 Refrigeration Pipe Supports 8 Suction Lines 8 Liquid Lines 9 Hot Gas Defrost Systems 9 Unit Cooler Piping 10 Line Sizing Tables 10 13 Evacuation and Lea...

Page 2: ...s factory and no freight shall be allowed for transportation of the motor compressor to and from the wholesaler The replacement motor compressor shall be identical to the model of the motor compresso...

Page 3: ...top of the pit This is a minimum requirement Decorative Fences Fences must have 50 free area with 1 foot undercut a W minimum clearance and must not exceed the top of unit If these requirements are n...

Page 4: ...where incoming water is 75 F and condensing temperature is 105 F Tower refers to a higher temperature relationship which is normally 85 F incoming water and 105 F condensing temperature Water circuit...

Page 5: ...units a structural analysis by a qualified engineer may be required before mounting Roof mounted units should be installed level on steel channels or an I beam frame capable of supporting the weight o...

Page 6: ...50 30 8 fan units 25 65 55 40 20 70 65 50 15 75 70 60 NOTE Cycle pairs of fans on double wide units Operation and Adjustment Condensing units with dual valves require sufficient charge to partially f...

Page 7: ...which oils lubricants are approved for use in Copeland compressors Mineral Oils The BR and Scroll compressors use Sontex 200 a white oil This oil is not suitable for low temperature applications nor i...

Page 8: ...at the base of each suction riser to enhance oil return to the compressor For desired method of superheat measurement a pressure tap should be installed in each evaporator suction line in the proximi...

Page 9: ...freezing The hot gas exits the loop at the pan loop outlet header and enters the evaporator through the check valve assembly As the hot gas defrosts the coil heat is removed from the hot gas and even...

Page 10: ...rator Refer to Table 5 Each 1 1 8 90 elbow adds 3 equivalent feet of pipe Each 90 turn through a 1 1 8 tee adds 6 equivalent feet Actual line run evap 1 105 feet 5 1 1 8 elbows 3 15 feet 1 90 turn thr...

Page 11: ...0 3 8 3 8 3 8 3 8 6 000 50 3 8 3 8 1 2 3 8 100 1 2 3 8 1 2 3 8 9 000 50 1 2 3 8 1 2 3 8 100 1 2 3 8 1 2 3 8 12 000 50 1 2 3 8 1 2 3 8 100 5 8 3 8 5 8 1 2 18 000 50 5 8 3 8 5 8 1 2 100 5 8 3 8 7 8 1 2...

Page 12: ...1 5 8 1 3 8 1 5 8 1 5 8 2 1 8 1 2 1 2 5 8 5 8 72 000 1 1 8 1 1 8 1 3 8 1 3 8 1 1 8 1 3 8 1 3 8 1 5 8 1 1 8 1 3 8 1 5 8 1 5 8 1 3 8 1 3 8 1 5 8 2 1 8 1 3 8 1 3 8 1 5 8 2 1 8 1 3 8 1 5 8 2 1 8 2 1 8 1 2...

Page 13: ...5 8 1 5 8 1 5 8 1 3 8 1 5 8 1 5 8 1 5 8 1 3 8 1 5 8 1 5 8 1 5 8 1 2 1 2 5 8 5 8 72 000 1 1 8 1 3 8 1 5 8 1 5 8 1 1 8 1 3 8 1 5 8 1 5 8 1 3 8 1 5 8 1 5 8 1 5 8 1 3 8 1 5 8 1 5 8 1 5 8 1 3 8 1 5 8 1 5 8...

Page 14: ...lve The vacuum pump should be operated until a pressure of 1 500 microns absolute pressure is reached at which time the vacuum should be broken with the refrigerant to be used in the system through a...

Page 15: ...re has stabilized Observe system pressures during charging and initial operation Do not add oil while the system is short of refrigerant unless oil level is dangerously low Continue charging until sys...

Page 16: ...rve oil level in compressor crankcase sight glass Add oil as necessary to bring level to bottom 1 4 of the sight glass Thermostatic expansion valves must be checked for proper superheat settings Feele...

Page 17: ...ly The defrost heaters are off The room thermostat closes when the temperature rises above the desired setting The liquid line solenoid is energized and opens which allows liquid refrigerant to flow t...

Page 18: ...ol operation 2 Open valve 3 Check for leaks Repair and add charge 4 See corrective steps for low suction pressure 5 Check valve setting High suction pressure 1 Excessive load 2 Expansion valve overfee...

Page 19: ...Check unit cooler superheat and compare reading for your specific application Visually inspect coil for even distribution Check moisture indicator sightglass for flash gas If found check entire syste...

Page 20: ...20 Diagram 3 Typical Wiring Diagram for Single Evaporator with and without Defrost Timer Diagram 4 Typical Wiring Diagram for Single Evaporator with Defrost Timer Only...

Page 21: ...21 Diagram 5 Typical Wiring Diagram for Multiple Evaporators with Defrost Timer Only Diagram 6 Typical Wiring Diagram for Single Evaporator Single Phase Defrost and Evaporator Fan Contactors...

Page 22: ...ram 7 Typical Wiring Diagram for Single Evaporator Defrost and Evaporator Fan Contactors Diagram 8 Typical Wiring Diagram for Multiple Evaporators with Evaporator Fan Contactors without Heater Limit D...

Page 23: ...Wiring Diagram for Multiple Evaporators Defrost and Evaporator Fan Contactors with Unit Cooler Holdout Relay Diagram 9 Typical Wiring Diagram for Multiple Evaporators with Heater Limit Defrost and Eva...

Page 24: ...the same high performance standards with which all HRP brands are built backed by a dedicated team to serve every customer need delivering at the best lead times in the industry Replacement parts sho...

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