Carrier 06D User Manual

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06D,07D Compressors and Condensing Units

Installation, Start-Upand

Service Instructions

Hermetic, Water-Cooled

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1

BEFORE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 1

Check Shipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Unit Location Considerations . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8

Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Piping Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Refrigerant Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

INITIAL START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

To Start Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

When working on the equipment, observe precautions in the literature, tags, stickers and labels attached to the equipment and any other safety precautions that apply. Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging and setting bulky equipment.

Electrical shock can cause personal injury and even death. Be sure power to equipment is shut off before installing or servicing this equipment. There may be more than one disconnect. Tag disconnect(s) to alert others not to turn power on until work is completed.

BEFORE INSTALLATION

CHECKING OPERATION. . . . . . . . . . . . . . . . . . . . . . . . .8,9

Oil Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

High-Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Low-Pressure Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Oil Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Time Guard® Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

CAPACITY CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . .9,10

Control Set Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

To Regulate Control Set Point . . . . . . . . . . . . . . . . . . . . 9

Pressure Differential Adjustment. . . . . . . . . . . . . . . . . 9

Capacity Control Pressure . . . . . . . . . . . . . . . . . . . . . . 10

CONDENSER MAINTENANCE . . . . . . . . . . . . . . . . .10,11

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-17

Service Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Testing Oil Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Cylinder Heads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Service Replacement Compressors . . . . . . . . . . . . . 14

Suction and Discharge Valve Plate Assembly . . . 15

Cleaning Suction Strainer . . . . . . . . . . . . . . . . . . . . . . . 16

Motor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Terminal Plate Assembly . . . . . . . . . . . . . . . . . . . . . . . . 16

Compressor Running Gear Removal . . . . . . . . . . . . 16

Compressor Running Gear Replacement. . . . . . . . 17

COMPRESSOR MOTOR BURNOUT . . . . . . . . . . . . . . 17

Clean-Up Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . .18,19

SAFETY CONSIDERATIONS

Installing, starting up and servicing this equipment can be hazardous due to system pressures, electrical components and equipment location (roofs, elevated structures, etc.). Only trained, qualified installers and service mechanics should install, start up and service this equipment.

Check Shipment — File claim with shipping company if shipment is damaged or incomplete.

Unit Location Considerations — Locate unit on floor in awell-ventilatedarea. Position unit to allow sufficient space for refrigerant and water connections and to service compressor. Place unit so suction and discharge valves can be easily reached and oil level checked. Do not install condensing unit where temperature will fall below freezing.

Local water can cause excessive fouling or sealing of condenser tubes. If such conditions are anticipated, a water treatment analysis is recommended. Refer to Carrier System Design Manual, Part 5, for general water conditioning information.

Make provision in piping layout to drain and vent condenser if system is to be shut down in winter.

INSTALLATION

Mount Unit — Level unit and bolt firmly to foundation. Loosen compressor mounting bolts and remove shipping blocks from under compressor. Tighten all 4 bolts on compressor. Next, loosen each bolt until the flanged washer can be moved sideways with finger pressure.

NOTE: Be sure that compressor floats freely on mounting springs.

Piping Connections — Attach water supply and return lines to connections indicated on condenser unit (Fig. 1). Water leaving condenser should not be connected directly into sewer lines. Check local codes.

Attach refrigerant liquid and suction lines to condensing units (Fig. 1); suction and discharge to compressor unit (Fig. 2). When soldering or brazing piping to valves, disassemble valve or wrap it in a wet cloth to prevent heat damage. Allow flexibility in suction line so compressor suction valve may be moved aside for access to suction strainer.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book

2

2

4

4

PC 802

Catalog No. 530-608

Printed in U.S.A.

Form 06/07D-3SI

Pg 1

802

7-02

Replaces: 06/07D-2SI

Tab

1b

2a

2b

3a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIMENSIONS (in.)

UNIT 07D

WIDTH A

A203

30

B205

30

A208

399/16

B210

519/16

B212

519/16

B215

6313/16

NOTES:

1. For standard service practices, such as troubleshooting and refrigerant charging, allow a minimum 2′-6″clearance around the unit.

2. Recommended service space for condenser tube removal is one condenser length at either end.

3. For compressor removal, allow a minimum 3′ wide access aisle to and from the unit.

4. Local codes or jurisdiction may prevail for unit clearances.

WATER CONNECTIONS FOR 07DB215 UNIT ONLY.

Fig. 1 — 07D Condensing Unit Dimensions

2

NOTES:

1.For standard service practices, such as trouble-

shooting and refrigerant charging, allow a minimum 2′-6″clearance around the unit.

2.For compressor removal, allow a minimum 3′ wide access aisle to and from the unit.

3.Local codes or jurisdiction may prevail for unit clearances.

Fig. 2 — 06D Compressor Unit Dimensions

3

Install a solenoid valve (field supplied) in liquid line directly before expansion valve. Solenoid valve is necessary for single pumpout control used on 06D, 07D units. Refrigerant filter drier and moisture indicator are shipped with 07D condensing units for field installation. Install in liquid line according to manufacturer’s instructions.

Relief valve located on top of condenser (07D units) will open to relieve excessive pressure, allowing refrigerant to escape. Most local codes require piping from safety device to outdoors.

Refer to Carrier System Design Manual, Part 3, for standard piping techniques.

COMPRESSOR UNITS — Connect highand low-pressureswitch capillary tubes from control box to compressor. See Fig. 2.

Install discharge line muffler (accessory) in discharge line as close to compressor shutoff valve as possible.

Electrical Connections

UNBALANCED 3-PHASESUPPLY VOLTAGE —Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the % voltage imbalance:

% Voltage Imbalance =

100 x

max voltage deviation from average voltage

average voltage

Example: Supply voltage is 230-3-60

AB = 236 volts

BC = 229 volts

AC = 234 volts

Average Voltage =

236 + 229 + 234

= 233 volts

3

 

 

Determine maximum deviation from average voltage:

(AB) 236 – 233 = 3 volts (BC) 233 – 229 = 4 volts (AC) 234 – 233 = 1 volt

Maximum deviation is 4 volts. Determine % voltage imbalance:

% Voltage Imbalance =100 x 2334 = 1.7%

This amount of phase imbalance is satisfactory as it is below the maximum allowable of 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

ELECTRICAL DATA NOTES

1.All 06D and 07D units are across-the-linestart.

2.Wire sizes are based on TW type copper wire. Maximum wire lengths based on data from Table 1 will result in a 1% voltage drop to compressor. Where up to 3% voltage drop is allowed, the run length can be increased to 3 times the length calculated from data in Table 1.

3.The 06D compressor unit electrical data shown in Table 1 does not apply for 06D compressors used as an integral part of other Carrier equipment. See proper installation book for electrical information.

WIRING — Power supply must correspond with unit nameplate electrical characteristics (units are internally wired at factory for nameplate voltage). Field wiring must comply with local and national codes.

Install a branch circuit fused disconnect of adequate size to handle starting current.

LINE POWER — Connect line power to the compressor contactor C. For example, connect L1 to terminal 11, L2 to terminal 12 and L3 to terminal 13. See Fig. 3.

Table 1 — Compressor Electrical Data

COMPRESSOR

VOLTAGE

 

 

 

 

MOTOR WINDING

PART NUMBER

HP

MCC

RLA

LRA

RESISTANCE

(3 Ph-60Hz)

06D*

 

 

 

 

(Ohms)

 

 

 

 

 

 

808

575

 

7

5

28.4

5.0

 

208/230

3

17.4

12.4

71

0.78

M

 

460

 

8.7

6.2

35.5

3.1

313

575

 

10.8

7.7

40

3.3

 

 

 

208/230

5

27

19.3

100

0.5

 

 

460

 

13.5

9.6

50

2.1

 

818

575

 

17.6

12.6

64

2.6

 

208/230

6.5

44

31.4

160

0.42

 

 

460

 

22

15.7

80

1.7

 

825

575

 

22.2

15.9

79

2.0

 

208/230

7.5

55.5

39.6

198

0.31

A

 

460

 

27.8

19.8

99

1.3

328

575

 

25

17.9

91

1.7

 

 

 

208/230

10

62

44.3

228

0.26

 

 

460

 

31

22.1

114

1.0

 

537

575

 

32

22.9

96

1.2

 

208/230

15

89

63.6

266

0.18

 

 

460

 

40

28.6

120

0.72

LEGEND

LRA — Locked Rotor Amps

MCC — Maximum Continuous Current

RLA — Rated Load Amps

*Refer to physical data table to match compressor with correct compressor unit or water-cooledcondensing unit.

NOTES:

1.RLA (rated load amps) value shown is: MCC 1.40 = RLA.

2.For minimum contactor sizing, use RLA value determined by: MCC 1.40 = RLA.

3.For wiring sizing, the RLA value can be determined by: MCC1.56 = RLA.

4.Compressor operating amps at any specific conditions can only be determined from a performance curve.

5.RLA values for 06D compressor protected by a calibrated circuit breaker will depend on must-tripvalue of circuit breaker.

6.Ohm values shown for resistance are approximate and shown for reference only. Motors from different vendors and motors of

different efficiencies can differ up to 15% from data shown.

7. Electrical data for compressor part numbers 06DR and 50 Hz models (not shown) are available from Carrier Sales Representative.

4

LEGEND

AUX

Auxiliary

C

Compressor Contactor

CH

Crankcase Heater

CR

Control Relay

DX

Direct Expansion

EQUIP —

Equipment

FU

Fuse

GND

Ground

HPS

High-PressureSwitch

IP

Internal Protector

LLS

Liquid Line Solenoid Valve

LPS

Low-PressureSwitch

M3

Cooling Tower Fan

NEC

National Electrical Code

OL

Overload

OPS

Oil-PressureSwitch

POR

Pumpout Relay

SW

Start-Stop-ResetSwitch

NOTES:

1.Factory wiring is in compliance with NEC. Any field modifications or additions must be in compliance with all applicable codes. Use copper, copper-cladaluminum for field power supply only.

2.Field power supply wiring must be 75 C minimum.

3.Compressor thermally protected. Three-phasemotors are protected against primarysingle-phasingcondition.

4.Pilot duty control must be field supplied. Minimum contact rating must be 25 va.

5.60 Hz units have 120-voltcontrol circuit. 50 Hz units have230-voltcontrol circuit. A separate source of supply at the correct voltage must be field supplied through a fused disconnect device

TB — Terminal Block

TM — Timer Motor

TR — Timer Relay

Terminal Block Connector

Unmarked Terminal

Marked Terminal

Factory Wiring

Field Control Wiring

To indicate common potential only; not to represent wiring.

Splice

 

 

with a maximum

rating of 15 A to TB2 connections

 

L1

(Hot Side) and

L2

(Neutral).

 

6.Open control circuit disconnect switch for servicing only. Disconnect must remain closed for crankcase heater to operate.

7.A transformer of the following rating may be field supplied for 60 Hz units: 350 va.

8.Transformer must be fused and grounded per applicable codes.

9.If any of the original wiring furnished must be replaced, it must be replaced with 90 C wire or its equivalent.

Fig. 3 — Unit Label Diagram — 06D,07D Units

5

Compressor Unit Connections — Extend power leads from control center (contactor terminals) to compressor terminal box and make connections as shown in Fig. 4.

Terminals 8 and 9 on motor terminal plate are for internal protector connections. As shown in Fig. 4, run a wire from terminal 9 to terminal 6 on TB2 in control center and a wire from terminal 1 on OL2 to terminal 2 on HPS in control center.

Run crankcase heater power wiring into control center. Connect leads to terminal 5 on pumpout relay and terminal 3 on terminal block TB2. See Fig. 5.

Affix power warning label supplied in the installer’s packet to fused disconnect which energizes crankcase heater (see unit label diagram).

LEGEND

HPS — High-PressureSwitch

OL — Overload Relay

TB — Terminal Block

Factory Wiring

Fig. 4 — Compressor Terminal Diagram

 

LEGEND

 

C

Contactor, Compressor

NEC

National Electrical Code

CH

Crankcase Heater

OL

Overload Relay

CR

Control Relay

OPS

Oil Pressure Switch

FU

Fuse

POR

Pumpout Relay

GND

Ground Connection

SW

Switch

HPS

High-PressureSwitch

TB

Terminal Block

IP

Internal Protector

TM

Timer Motor

LPS

Low-PressureSwitch

TR

Timer Relay

NOTES:

1.Factory wiring is in compliance with NEC. Any field modifications or additions must be in compliance with all applicable codes. Use copper, copper-cladaluminum for field power supply only.

2.Field power supply wiring must be 75 C minimum.

3.Compressor thermally protected. Three-phasemotors are protected against primarysingle-phasingcondition.

4.Pilot duty control must be field supplied. Minimum contact rating must be 25 va.

5.60 Hz units have 120-voltcontrol circuit. 50 Hz units have230-voltcontrol circuit. A separate source of supply at the correct voltage must be

field supplied thru a fused disconnect device with a max rating of 15 A to TB2 connections L1 (Hot Side) and L2 (Neutral).

6.Open control circuit disconnect switch for servicing only. Disconnect must remain closed for crankcase heater to operate.

7.A transformer of the following rating may be field supplied for 60 Hz units: 350 va.

8.Transformer must be fused and grounded per applicable codes.

9.If any of the original wiring furnished must be replaced, it must be replaced with 90 C wire or its equivalent.

CONTROL WIRING — Control circuit power is 115 volts, energized from an external source or from unit voltage through field-suppliedtransformer. Transformer size required is 350 va for 60 Hz units. External control power source must be supplied through a15-ampfused disconnect. Connect control circuit power leads to terminal block TB2, terminals L1 and L2. Terminal L2 is neutral potential (ground).

Compressor Protection — The 06D and 07D units are factory wired forsingle-pumpoutcontrol. Field addition and wiring of line voltage remote control and liquid line solenoid valve is required. (See unit Fig. 3 and Fig. 6.) Remote control minimum contact rating must be 25 va. Solenoid valve must have a maximum load rating of 50 va holding; 200 va inrush. For applications with cooling tower,air-cooledor evaporative condensers, add necessary auxiliary contacts in line between compressor contactor and terminal A1 on timer. Insert desired interlocks and overloads between terminals 5 and 9 on terminal block TB2.

Control wiring may be modified as shown in Fig. 6 for automatic pumpdown control; removelow-pressureswitch between timer relay and terminal 4 on TB2. Wirelow-pressureswitch between terminals 9 and 6 on TB2. Add necessary auxiliary contacts between compressor contactor and terminal A1 on timer. Remove wire between terminal 6 on TB2 and terminal 3 on pumpout relay. Insert required interlocks and overloads between terminals 5 and 9 on TB2.

Limitations — Do not use automatic pumpdown control on direct expansion cooler applications or when compressors are equipped withpressure-typeunloader valves. Pressure unloader valves havebuilt-inhigh to low passage which allows compressor to cycle with automatic pumpdown.

Fig. 5 — 06D/07D Control Box Components and Connections (3-Phase)

6

 

LEGEND

 

 

AUX — Auxiliary

OL

Overload Relay

C

Contactor

POR — Pumpout Relay

CR

Control Relay

SW

Switch

HPS — High-PressureSwitch

TB

Terminal Block

LLS — Liquid Line Solenoid Valve

TR

Timer Relay

LPS — Low-PressureSwitch

 

Factory Wiring

M3

Evaporator Fan or Chilled Water Pump

 

Field Wiring

M4

Cooling Tower Pump,Air-Cooledor

 

 

 

Evaporative Condenser Fan

 

 

M5

Cooling Tower Fan or

*Optional.

 

Evaporative Condenser Pump

 

 

Fig. 6 — Recommended Field Wiring

7

Refrigerant Charging

When charging, or when removing charge, circulate water through water-cooledcondenser(s) and cooler continuously to prevent freezing. Freezing damage is considered abuse and is not covered by Carrier warranty.

EVACUATE, DEHYDRATE AND LEAK TEST — Entire refrigerant system must be evacuated, dehydrated and leak tested by methods described in Carrier Standard Service Techniques Manual, Chapter 1, Sections 1-6and1-7.Use sight glass method to charge system. See Section1-8of manual for details.

CHARGE THE SYSTEM — Charge to a clear sight glass while holding saturated condensing pressure constant at 125 F (air-cooledsystems) or 105 F(water-cooledsystems). Add additional refrigerant to fill condenser subcooler coils, where applicable, forair-cooledapplications.

06D Compressor Units — See condenser data for additional charge required to fill subcooler after clear sight glass is obtained.

INITIAL START-UP

Do not attempt start-upwith terminal cover removed. Bodily injury or death may result from explosion and/or fire if power is supplied to compressor with the terminal cover removed or unsecured. See warning label on terminal cover.

Crankcase heater should be energized a minimum of 24 hours before starting unit. Do not permit crankcase heaters to be deenergized during normal shutdown periods.

Check to see that oil level is 1/3 to2/3 up on compressor sight glass.

Open water supply valve and allow water to reach condenser. Open pressure line valve of water regulating valve, if used. (Turn condenser fan on when the compressor unit is applied with air-cooledcondenser.)

Backseat (open) the compressor suction and discharge shutoff valves; open liquid line valve at receiver.

Start evaporator fan or chilled water pump.

To Start Compressor — Close main power switch, control power switch, and unitON-OFFswitch. Time Guard® control circuit causes a short delay before compressor starts.

Recheck oil level and check oil pressure. See Oil Charge for details.

With unit operating, voltage at compressor terminals must be within limits shown on nameplate. Phases must be balanced within 2% of voltage (refer to Electrical Connections section). Contact local power company for correction of improper line voltage or phase imbalance. Operation of unit on improper line voltage or with excessive phase imbalance constitutes abuse and is not covered by Carrier Warranty.

NOTE: The 06D, 07D unit safety controls are of theautomatic-resettype. If compressor is shut off by a safety control, do not permit control to reset more than once before determining cause of shutdown.

CHECKING OPERATION

Refer to Carrier Standard Service Techniques Manual, Chapter 2 for complete instructions on checking electrical components.

Oil Charge (See Tables 2A and 2B) — Check oil level in compressor sight glass after 15 to 20 minutes of operation. If oil level is low, add oil according to methods described in Carrier Standard Service Techniques Manual, Chapter 1 (Section 1-11). Add oil through suction manifold connection on 4-cylinder compressors, and oil port on 6-cylinder compressors.

The preferred method for a complete recharge is to 1/2 sight glass with compressor shut down.

When additional oil, or a complete charge, is required, use only Carrier-approvedcompressor oil.

Approved* oils are:

Witco. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..Suniso 3GS Texaco, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Capella WF-32

*Oils approved for R-12,R-22,R-502Carrier refrigerants. For other refrigerants, contact Carrier Factory Sales Representative.

IMPORTANT: Do not reuse drained oil and do not use oil that has been exposed to atmosphere.

High-PressureSwitch —Check by throttling condenser water or blocking airflow on air-cooled units, allowing head pressure to rise gradually. Check discharge pressure constantly throughout procedure. Compressor should shut off within 10 psi of values shown in Table 3.

Low-Pressure Switch — Check by slowly closing suction shutoff valve or by completely closing liquid line shutoff valve. A decrease of suction pressure will follow. Compressor should shut off within 4 psi of values shown in Table 3.

Oil Pressure Switch (OPS) — The oil pressure switch protects against damage from loss of oil or loss of oil pressure during unit start-up. If the oil pressure differential sensed by the OPS is 6 psig or less on unit start-up, the switch remains closed and the OPS heater is energized.

The switch time delay is approximately 45 seconds. If after 45 seconds the oil pressure differential sensed by the OPS is less than 11 psig, the heater remains energized. The OPS temperature actuated switch then opens and the compressor is deenergized. If the differential reaches 11 psig, the OPS opens and deenergizes the heater and the system operates normally.

IMPORTANT: If the oil pressure switch causes unit lockout, determine and correct the cause of the lockout (such as loss of compressor oil or flooded compressor) before restarting the unit. Failure to correct the cause of OPS lockout may constitute abuse. Equipment failure due to abuse is not covered by warranty.

To restart the unit, push the OPS reset button and then push the control circuit switch on the unit control box to OFF and then to ON.

Time Guard® Control — Control provides a delay of approximately 5 minutes before restarting compressor after shutdown for any reason. On starting, the Time Guard control timer causes a delay of 15 seconds after thermostat closes before compressor will start.

8

Table 2A — 06D Physical Data

UNIT 06D

A8081

 

H3131

 

A8181

 

 

E8251

 

E3281

 

E5371

OPERATING WEIGHT (lb)

180

 

250

 

265

 

 

325

 

325

 

330

REFRIGERANT

 

 

 

 

R-134a,R-22,R-507/404A

 

 

 

 

COMPRESSOR — 06D*

M808

 

M313

 

A818

 

 

A825

 

A328

 

A537

Cylinders

2

 

4

 

4

 

 

6

 

6

 

6

Bore (in.)

2

 

2

 

2

 

 

2

 

2

 

2

Stroke (in.)

11/4

 

1

 

17/16

 

 

11/4

 

115/32

 

115/16

Displacement (cfm at 1750 rpm)

8

 

13

 

18.3

 

 

23.9

 

28

 

37.1

Maximum Rpm

 

 

 

 

 

 

1750

 

 

 

 

Oil Charge (pt)

3

 

4.5

 

5.5

 

 

8

 

8

 

8

 

 

 

 

 

High Side Maximum Pressure

 

 

 

 

 

450

 

PSIG

 

 

 

 

Low Side Maximum Pressure

 

 

 

 

 

245 PSIG

 

 

 

 

CONNECTIONS (in.)

 

 

 

 

 

 

 

 

 

 

 

 

Suction Valve (ODF)

7/8

 

7/8

 

11/8

 

 

13/8

 

13/8

 

13/8

Discharge Valve (ODF)

5/8

 

5/8

 

7/8

 

 

7/8

 

7/8

 

11/8

*Compressors listed are for R-22applications. ForR-134aandR-507/404A an 06DR compressor is standard. Factory compressor substitutes may be made. Contact Carrier Sales Representative.

NOTE: The 06DE8251 compressor unit with the 06DA825 compressor replaces the 06DE8241 once inventory of the 06DA824 compressor is depleted.

Table 2B — 07D Physical Data

UNIT 07D

 

A203

 

B205

 

A208

 

 

B210

 

B212

 

B215

OPERATING WEIGHT (lb)

 

270

 

395

 

420

 

 

545

 

595

 

620

REFRIGERANT

 

 

 

 

 

R-134a,R-22,R-507/404A

 

 

 

 

COMPRESSOR — 06D*

 

M808

 

M313

 

A818

 

 

A825

 

A328

 

A537

Cylinders

 

2

 

4

 

4

 

 

6

 

6

 

6

Bore (in.)

 

2

 

2

 

2

 

 

2

 

2

 

2

Stroke (in.)

 

11/4

 

1

 

17/16

 

 

11/4

 

115/32

 

115/16

Displacement (cfm at 1750 rpm)

 

8

 

13

 

18.3

 

 

23.9

 

28

 

37.1

Maximum Rpm

 

 

 

 

 

 

1750

 

 

 

 

Oil Charge (pt)

 

3

 

4.5

 

5.5

 

 

8

 

8

 

8

 

 

 

 

 

 

High Side Maximum Pressure

 

 

 

 

 

 

450

 

PSIG

 

 

 

 

Low Side Maximum Pressure

 

 

 

 

 

 

245 PSIG

 

 

 

 

CONDENSER (Shell and Tube)† Part Number

P701-0605CX

 

P701-0607CX

 

P701-0610CX

 

P701-0615CX

 

P701-0620CX

 

P701-0625AX

Refrigerant Storage

R-134a

17.20

 

15.90

 

24.40

 

 

31.60

 

27.40

 

39.80

2.86

 

3.16

 

5.00

 

 

7.55

 

8.47

 

9.18

Capacity (lb)

 

 

 

 

 

 

 

R-22

17.00

 

15.70

 

24.10

 

 

31.20

 

27.10

 

39.30

 

 

 

 

 

 

 

Min Refrigerant Operating

2.80

 

3.10

 

4.90

 

 

7.40

 

8.30

 

9.00

 

 

 

 

 

 

 

 

14.70

 

13.60

 

20.90

 

 

27.10

 

23.50

 

34.10

Charge (lb)

R-507/404A

 

 

 

 

 

 

 

 

2.80

 

3.10

 

4.90

 

 

7.40

 

8.30

 

9.00

REFRIGERANT CONNECTION (in. ODF)

 

 

 

 

 

 

 

 

 

 

 

 

Inlet

 

15/8

 

15/8

 

15/8

 

 

15/8

 

15/8

 

15/8

Outlet

 

11/8

 

11/8

 

11/8

 

 

11/8

 

11/8

 

11/8

WATER CONNECTION (in. FPT)

 

 

 

 

 

 

 

 

 

 

 

 

 

Inlet/Outlet

 

1

 

1

 

11/4

 

 

11/4

 

11/4

 

2

LEGEND

FPT — Female Pipe Thread

ODF — Outside Diameter, Female

*Compressor listed is the standard compressor for R-22,air conditioning duty. An 06DR compressor is standard equipment for low temperature(R-507/404A)or medium temperature(R-134a)applications. Factory substitutions may be made. Contact Carrier Sales Representative.

†The condenser listed is for R-22,air conditioning duty and may change based on the application. Maximum condenser operating pressure: 350 psi refrigerant side, 300 psi water side (“CX” models); 350 psi refrigerant side, 150 psi water side (“AX” models).

NOTE: The 07DB210 with the 06DA825 compressor replaces the 07DB210 with the 06DA824 once the compressor inventory is depleted.

Table 3 — Factory Switch Settings

 

 

PRESSURE CHANGE AFFECTING

SWITCH TYPE

 

SWITCH POSITION

 

 

 

Closed

 

Open

High Pressure

210

(±10) (psig)

290

(±10) (psig)

Low Pressure

70

(±4) (psig)

60

(±4) (psig)

Oil Pressure

 

6 (psid)

11 (psid)

LEGEND

psid — pounds per square inch differentialpsig — pounds per square inch gage

NOTES:

1.Values for the highand low-pressureswitches based onR-22.For other refrigerants, reset to pressure corresponding to saturation temperatures indicated by the listed pressures.

2.Values for oil pressure are above operating suction pressure (pressure differential between suction and discharge pressures of oil pump).

CAPACITY CONTROL (Suction Cutoff Type)

Control Set Point (Cylinder Load Point) — Set point is adjustable from 0 to 86 psig. Pressure differential between cylinder load-up point and cylinder unload point is adjustable from 7 to 19 psi.

To Regulate Control Set Point — Refer to Fig. 7. Turn adjustment nut clockwise to its bottom stop (with nut in this position, set point is 86 psig). Control set point is then regulated to desired pressure by turning adjustment nut counterclockwise. Every full turn decreases set point by 7.2 psi. Approximately 12 turns in counterclockwise direction will decrease control set point to 0 psig. Table 4 shows steps of control for the compressor and condensing unit.

Pressure Differential Adjustment — Turn differential adjusting screw counterclockwise to itsback-stopposition (differential in this position is 7 psi). Pressure differential is set by turning adjustment screw clockwise. Every full turn increases differential by 1.2 psi. Approximately 10 turns in clockwise direction will increase pressure differential to 19 psi.

9

802

CONTROL

SET POINT

ADJUSTMENT

NUT

POWER

HEAD

PRESSURE

DIFFERENTIAL

ADJUSTMENT

SCREW

VALVE BODY

BYPASS

PISTON RING

BYPASS PISTON-USED

 

WITH HOT GAS BYPASS

DIFFERENTIAL SCREW

TYPE OF UNLOADING ONLY.

NOT REQUIRED WITH

SEALING CAP (CAP MUST

SUCTION CUTOFF TYPE

BE REPLACED TO PREVENT

UNLOADING.

REFRIGERANT LEAKAGE)

Fig. 7 — Capacity Control Valve

(Pressure Type)

Table 4 — Capacity Control Reduction Steps

 

 

 

% Full Load Capacity

 

 

NO. OF

100

 

67

49

 

32

UNIT 06D,07D

CONTR

 

 

% Full Load kW

 

 

CYL

100

 

73

57

 

46

 

 

 

 

 

 

Number of Active Cylinders

ALL 4 CYLINDER

2

4

 

2

 

MODELS

 

 

 

 

 

 

 

 

 

ALL 6 CYLINDER

4

6

 

4

 

2

MODELS

 

 

 

 

 

 

 

 

 

Capacity Control Pressure (Fig. 8)

LOADED OPERATION — Pressure-operatedcontrol valve is controlled by suction pressure and actuated by discharge pressure. Each valve controls 2 cylinders (one bank). Onstart-up,controlled cylinders do not load up until differential between suction and discharge pressures is approximately 25 psi.

When suction pressure rises high enough to overcome control set point spring, the diaphragm snaps to the left and relieves pressure against the poppet valve. The drive spring

moves the poppet valve to left and it seats in the closed position.

With poppet valve closed, discharge gas is directed into the unloader-pistonchamber and pressure builds up against the piston. When pressure against unloader piston is high enough to overcome the unloader valve spring, piston moves valve to the right, opening suction port. Suction gas can now be drawn into the cylinders and the bank is running fully loaded.

UNLOADED OPERATION — As suction pressure drops below set point, control spring expands, snapping diaphragm to right. This forces poppet valve open and allows gas from discharge manifold to vent through base of control valve to suction side. Loss of full discharge pressure against unloaded piston allows unloader valve spring to move valve left to closed position. The suction port is blocked, isolating the cylinder bank from the suction manifold. The cylinder bank is now unloaded.

CONDENSER MAINTENANCE

To inspect and clean condenser, drain water and remove condenser heads. To drain condenser, shut off water supply and disconnect inlet and outlet piping. Remove drain plugs and vent plug.

With condenser heads removed, inspect tubes for refrigerant leaks. (Refer to Carrier Refrigerant Service Techniques Manual.)

Clean condenser tubes with nylon brush (available from Carrier Service Department). Flush water through tubes while cleaning. If hard scale has formed, clean tubes chemically. Do not use brushes that will scrape or scratch tubes.

Because the condenser water circuit is usually an open system, the condenser tubes may be subject to contamination by foreign matter. Local water conditions may cause excessive fouling or pitting of tubes. Condenser tubes, therefore, should be cleaned at least once a year or more often if the water is contaminated.

Proper water treatment can minimize tube fouling and pitting. If such conditions are anticipated, water treatment analysis is recommended. Refer to the Carrier System Design Manual, Part 5, for general water conditioning information.

If hard scale has formed, clean the tubes chemically. Consult an experienced and reliable water-treatmentfirm in your area for treatment recommendations. Clean the condenser by gravity or by forced circulation as shown in Fig. 9 and 10.

IMPORTANT: If the ambient temperature is below 32 F during a shutdown period; protect the condenser from freezing by draining the water from the system or by adding antifreeze to the water.

10