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Table 5. Equivalent Feet of Pipe Due to Valve and Fitting Friction

Copper Tuber, O.D., Type “L”

1/2

5/8

7/8 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)

118

138

168

Angle Valve (Open)

90˚ Turn Through Tee

Tee (Straight Through)

or Sweep Below

.75

1.5

2.5

3.5

90˚ Elbow or Reducing

Tee (Straight Through)

Table 4. Pressure Loss of Liquid Refrigerants in Liquid Line Risers

(Expressed in Pressure Drop, PSIG, and Subcooling Loss, ˚F).

Liquid Line Rise in Feet

10ʼ

15ʼ

20ʼ

25ʼ

30ʼ

40ʼ

50ʼ

75ʼ

100ʼ

Refrigerant PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F

R22

4.8

1.6

7.3

2.3

9.7

3.1 12.1 3.8 14.5 4.7 19.4 6.2 24.2 8.0 36.3 12.1 48.4 16.5

R134a

4.9

2.0

7.4

2.9

9.8

4.1 12.3 5.2 14.7 6.3 19.7 8.8 24.6 11.0 36.8 17.0 49.1 23.7

R507, R404A 4.1

1.1

6.1

1.6

8.2

2.1 10.2 2.7 12.2 3.3 16.3 4.1 20.4 5.6 30.6 8.3 40.8 11.8

Based on 110˚F liquid temperature at bottom of riser.

Содержание H-IM-FL1A

Страница 1: ...riers Sight Glasses 5 Refrigerant Oils 6 Phase Loss Monitor 7 Recommended Refrigerant Piping Practices 7 Refrigeration Pipe Supports 7 Suction Lines 8 Suction Line Risers 8 Liquid Lines 8 Evacuation and Leak Detection 11 Refrigerant Charging Instructions 12 Field Wiring 12 Check Out and Start Up 12 Operational Check Out 13 System Balancing Compressor Superheat 13 System Troubleshooting Guide 14 Pr...

Страница 2: ...turerʼs recommendations or if the serial number has been altered defaced or removed MOTOR COMPRESSORS Motor compressors furnished by SELLER are subject to the standard warranty terms set forth above except that motor compressor replacements or exchanges shall be made through the nearest authorized wholesaler of the motor compressor manufacturer not at SELLERʼs factory and no freight shall be allow...

Страница 3: ...d Location Requirements for Air Cooled Condensing Units and Remote Condensers Units in Pits The top of the unit should be level with the top of the pit and side distance increased to 2W If the top of the unit is not level with the top of pit discharge cones or stacks must be used to raise discharge air to the top of the pit This is a minimum requirement Decorative Fences Fences must have 50 free a...

Страница 4: ...ess Provide adequate space at the compressor end of the unit for servicing Provide adequate space on the connection side to permit service of components Spring Mounted Compressor Compressors are secured rigidly to make sure there is no transit damage Before operating the unit it is necessary to follow these steps a Remove the upper nuts and washers b Discard the shipping spacers c Install the neop...

Страница 5: ... drier The sight glass is designed to give a visual indication of moisture content in the system Generally it requires no ﬁeld service However in cases of extreme acid formation in a system after a compressor burnout the acid may damage the sensing element or etch the glass This would require that the sight glass be replaced along with the liquid line drier after any compressor motor burnout CAUTI...

Страница 6: ...introduction of the Polyol ester lubricants Table 3 below summarizes which oils lubricants are approved for use in Copeland compressors Polyol Ester Lubricants Hygroscopicity Ester lubricants POE have the characteristic of quickly absorbing moisture from the ambient surroundings This is shown graphically in Figure 3 where it can be seen that such lubricants absorb moisture faster and in greater qu...

Страница 7: ... the base of each suction riser of four 4 feet or more to enhance oil return to the compressor e For desired method of superheat measurement a pressure tap should be installed in each evaporator suction line in the proximity of the expansion valve bulb f When brazing refrigerant lines an inert gas should be passed through the line at low pressure to prevent scaling and oxidation inside the tubing ...

Страница 8: ...superheat at the compressor Figure 6 Suction P Traps Slope 1 4 per 10 ft toward compressor Suction Lines NOTE If the suction line must rise to a point higher than the suction connection on the evaporator a suction line trap at the outlet of the evaporator must be provided Horizontal suction lines should slope away from the evaporator toward the compressor at the rate of 1 4 inch per 10 feet for go...

Страница 9: ...Tee Straight Through 1 2 2 3 4 4 5 7 8 10 12 14 16 Table 4 Pressure Loss of Liquid Refrigerants in Liquid Line Risers Expressed in Pressure Drop PSIG and Subcooling Loss F Liquid Line Rise in Feet 10ʼ 15ʼ 20ʼ 25ʼ 30ʼ 40ʼ 50ʼ 75ʼ 100ʼ Refrigerant PSIG F PSIG F PSIG F PSIG F PSIG F PSIG F PSIG F PSIG F PSIG F R22 4 8 1 6 7 3 2 3 9 7 3 1 12 1 3 8 14 5 4 7 19 4 6 2 24 2 8 0 36 3 12 1 48 4 16 5 R134a 4...

Страница 10: ... 1 3 27 26 39 63 86 1 24 134a 64 2 2 57 14 26 40 61 1 91 1 3 8 22 63 5 3 50 27 42 64 93 1 33 R507 404A 55 0 4 98 40 58 95 1 32 1 87 134a 90 9 3 65 20 37 57 87 1 30 1 5 8 22 90 0 4 96 37 59 90 1 33 1 88 R507 404A 78 0 7 07 56 82 1 35 1 86 2 64 134a 158 6 34 34 64 98 1 51 2 24 2 1 8 22 156 8 61 65 1 03 1 57 2 30 3 26 R507 404A 134 12 25 98 1 43 2 35 3 23 4 58 134a 244 9 78 52 99 1 51 2 32 3 47 2 5 8...

Страница 11: ...CFCʼs There is a view that even small quantities of chlorine may act as a catalyst encouraging copper plating and or corrosion and should therefore be avoided WARNING HFC 134a has been shown to be combus tible at pressure as low as 5 5 psig at 350 F when mixed with air at concen trations more than 60 air by volume At lower temperature higher pressures are required to support combustion Therefore a...

Страница 12: ...ng until system has sufﬁcient refrigerant for proper operation Do not overcharge Remember that bubbles in a sight glass may be caused by a restriction as well as a shortage of refrigerant i Do not leave unit unattended until the system has reached normal operating conditions and the oil charge has been properly adjusted to maintain the oil level at the center of the sight glass CAUTION Extreme car...

Страница 13: ...ve at the evaporator should be adjusted Operational Check Out After the system has been charged and has operated for at least two hours at normal operating conditions without any indication of malfunction it should be allowed to operate overnight on automatic controls Then a thorough recheck of the entire system operation should be made as follows a Check compressor discharge and suction pressures...

Страница 14: ... system 3 Check for leaks Repair and add charge 4 Low suction pressure 4 See corrective steps for low suction pressure 5 Variable head pressure valve 5 Check valve setting High suction pressure 1 Excessive load 1 Reduce load or add additional equipment 2 Expansion valve overfeeding 2 Check remote bulb Regulate superheat Low suction pressure 1 Lack of refrigerant 1 Check for leaks Repair and add ch...

Страница 15: ... and components Verify that all electrical and ground connections are secure tighten as required Check condition of compressor and heater contactors Look for discoloration and pitting Replace as required Check operation and calibration of all timers relays pressure controls and safety controls Clean electrical cabinet Look for signs of moisture dirt debris insects and wildlife Take corrective acti...

Страница 16: ...ATE MODULE R1 R4 RELAYS TD7 8 START TIMER FIELD WIRING FACTORY WIRING CB1 CB7 CIRCUIT BREAKERS F1 FUSE CLASS CC CCH CRANKCASE HEATERS C1 C4 COMPRESSOR CONTACTORS C1A1 C4A1 C1 C4 AUXILIARY CONTACTS C5 C12 CONDENSER FAN CONTACTORS FCT FAN CYCLE TEMP CONTROL LSV LIQUID LINE SOLENOID VALVE HPS HIGH PRESSURE SWITCH LPS LOW PRESSURE SWITCH LEGEND w 30 MIN TIME DELAY 25 A M1 M3 C5 25 A C6 25 A M5 M7 C7 2...

Страница 17: ...TE MODULE R1 R4 RELAYS TD7 8 START TIMER FIELD WIRING FACTORY WIRING CB1 CB7 CIRCUIT BREAKERS F1 FUSE CLASS CC CCH CRANKCASE HEATERS C1 C4 COMPRESSOR CONTACTORS C1A1 C4A1 C1 C4 AUXILIARY CONTACTS C5 C12 CONDENSER FAN CONTACTORS FCT FAN CYCLE TEMP CONTROL LSV LIQUID LINE SOLENOID VALVE HPS HIGH PRESSURE SWITCH LPS LOW PRESSURE SWITCH LEGEND w 30 MIN TIME DELAY 25 A M1 M3 C5 25 A C6 25 A M5 M7 C7 25...

Страница 18: ...18 Control Circuit Wiring Diagram for BACU51 and BACU59 ...

Страница 19: ...19 Submittal ...

Страница 20: ...20 Submittal ...

Страница 21: ...t Serial ________________________________________ Compressor Model ____________________ Compressor Model _________________ Compressor Serial ____________________ Compressor Serial __________________ Electrical _________________ Volts __________________ Phase _______ Voltage at Compressor L1__________ L2 ___________ L3 ___________ Amperage at Compressor L1__________ L2 ___________ L3 ___________ Se...

Страница 22: ...22 Notes ...

Страница 23: ...23 Notes ...

Страница 24: ...PLACE BOULEVARD STONE MOUNTAIN GA 30087 USA 770 465 5600 FAX 770 465 5990 WWW HEATCRAFTRPD COM Since product improvement is a continuing effort we reserve the right to make changes in specifications without notice Visit us online at www heatcraftrpd com ...

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