Carrier 50PEC09-18 Aquazone Service Instructions

AQUAZONE™

50PEC09-18

Water Source Heat Pump Console Unit with

PURON

®

Refrigerant (R-410A)

50 Hz

Installation, Start-Up and Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26

Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . 2

Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 17

• STORAGE

• UNIT PROTECTION

Step 3 — Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Step 4 — Wire Electrical Connections . . . . . . . . . . 17

• SUPPLY VOLTAGE

• EXTERNAL LOOP POWER CONNECTION

• 220-V OPERATION

Step 5 — Wire Low Voltage Connections . . . . . . . 25

• WATER FREEZE PROTECTION

• ACCESSORY CONNECTIONS

• WATER SOLENOID VALVES

• OPTIONAL WALL-MOUNTED THERMOSTAT

• OPTIONAL PREMIERLINK™ CONTROLLER

Step 6 — Install Supply and Return Piping . . . . . . 26

• SUPPLY AND RETURN HOSES

• SUPPLY AND RETURN PIPING

Step 7 — Install Condensate Piping . . . . . . . . . . . . 26

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27-29

System Cleaning and Flushing . . . . . . . . . . . . . . . . 27

System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . .29,30

Complete C Control Jumper Settings . . . . . . . . . . . 29

Complete C Control DIP Switches . . . . . . . . . . . . . . 29

Deluxe D Control Jumper Settings . . . . . . . . . . . . . 29

Deluxe D Control DIP Switches . . . . . . . . . . . . . . . . 29

Deluxe D Control Accessory

Relay Configurations . . . . . . . . . . . . . . . . . . . . . . . 30

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-32

Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Flow Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . 32

Ground Coupled, Closed Loop and Plateframe

Heat Exchanger Well Systems . . . . . . . . . . . . . . . 32

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32,33

Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Units with Aquazone Complete C Control . . . . . . . 32

Units with Aquazone Deluxe D Control . . . . . . . . . 32

COMPLETE C AND DELUXE D BOARD

SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . .33,34

Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Retry Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Aquazone Deluxe D Control LED Indicators . . . . . 33

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-36

Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

System Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Page

Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Condensate Pans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Blower Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Safety Control Reset . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Checking System Charge . . . . . . . . . . . . . . . . . . . . . 36

Refrigerant Charging . . . . . . . . . . . . . . . . . . . . . . . . . 36

Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . 36

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . .36-38

Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Control Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

START-UP CHECKLIST . . . . . . . . . . . . . . . . . CL-1, CL-2

IMPORTANT: Read the entire instruction manual before starting installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components.

Only trained and qualified service personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other operations should be performed by trained service personnel.

When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes and applicable electrical codes for special installation requirements.

Understand the signal words — DANGER, WARNING, and

CAUTION. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards that could result in personal injury or death.

CAUTION is used to identify unsafe practices, which would result in minor personal injury or product and property damage.

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

Catalog No. 04-53500075-01 Printed in U.S.A.

Form 50PEC-C1SI Pg 1 9-10 Replaces: New

WARNING

Electrical shock can cause personal injury or death. Before installing or servicing system, always turn off main power to system. There may be more than one disconnect switch.

Turn off accessory heater power if applicable.

GENERAL

The 50PEC water source heat pump console unit is a decentralized room terminal designed for field connection to a closed-circuit piping loop.

Units are typically installed in perimeter zones, usually under windows. Supply air is discharged directly into the conditioned space through discharge grilles located in the top of the unit.

IMPORTANT: The installation of console water source heat pump units and all associated components, parts, and accessories which make up the installation shall be in accordance with the regulations of ALL authorities having jurisdiction and MUST conform to all applicable codes. It is the responsibility of the installing contractor to determine and comply with ALL applicable codes and regulations.

to Table 1 and Fig. 3-14. Locate the console unit so that it provides adequate air circulation throughout the room.

Installation, operation and maintenance instructions are provided with each unit. Before unit start-up, read all manuals and become familiar with the unit and its operation. Thoroughly check out the system before operation. Complete the inspections and instructions listed below to prepare a unit for installation.

1. Compare the electrical data on the unit nameplate with ordering and shipping information to verify that the correct unit has been shipped.

2. Keep both the chassis and cabinet covered with the shipping carton until all plastering, painting, and finish work is complete and it is time to install the chassis and cabinet.

3. Verify that the refrigerant tubing is free of kinks or dents, and that it does not touch other unit components.

4. Inspect all electrical connections. Connections must be clean and tight at the terminals.

CAUTION

To avoid equipment damage, do not use these units as a source of heating or cooling during the construction process. The mechanical components and filters used in these units quickly become clogged with construction dirt and debris which may cause system damage.

INSTALLATION

Step 1 — Check Jobsite —

Units are typically installed along an outside wall of the room. Refer to Fig. 1 and 2 for an illustration showing piping locations. Install units with adequate clearance to allow maintenance and servicing. Refer

CAUTION

To avoid the release of refrigerant into the atmosphere, the refrigerant circuit of this unit must only be serviced by technicians who meet local, regional, and national proficiency requirements.

Table 1 — 50PEC Physical Data

COMPRESSOR (Qty)

BASE UNIT 50PEC

REFRIG. CHARGE (R-410A)/CKT (kg)

No. of Circuits

BLOWER

Motor kW

Wheel Size D x W (mm) 2 each

WATER CONNECTION SIZE

OD Sweat (in.)

Optional FPT Fittings (in.)

Optional MPT Fittings (in.)

CONDENSATE CONNECTION SIZE (ID Vinyl) (in.)

Air Coil Size (h x w) (mm)

FILTER SIZE (h x w x d) (mm)

Bottom Return

Front Return

CABINET SIZE (h x w x d) (mm)

Bottom Return With Standard 127 mm Subbase

Front Return With No Subbase

UNIT WEIGHT (kg)

Shipping

Operating

Unit Maximum Working Pressure (kPa)

Base Unit

Internal Secondary Pump

Internal Motorized Water Valve

Internal Autoflow Valve

1

1

1 /

5 /

/

/

2

2

2

8

203 x 660

1219 x 660 x 305

1219 x 533 x 305

NOTES:

1. All units have grommet compressor mountings and TXV (thermostatic expansion valve) devices.

09

0.737

1

0.37

133 x 159

254 x 762 x 25

178 x 749 x 3

84

79

3100

999

2067

3100

12

0.822

1

1

0.62

133 x 159

1

1

/

/

/

2

2

2

5 /

8

254 x 660

254 x 762 x 25

178 x 749 x 3

1219 x 660 x 305

1219 x 533 x 305

86

82

Rotary (1)

15

0.936

0.93

133 x 159

1

1

1

/

/

2

1 /

2

2

5 /

8

254 x 660

254 x 762 x 25

178 x 749 x 3

1219 x 660 x 305

1219 x 533 x 305

91

86

18

0.850

0.93

133 x 159

3

3

1

3 /

5 /

/

/

4

4

4

8

254 x 812

254 x 914 x 25

178 x 800 x 3

1372 x 660 x 305

1372 x 533 x 305

105

100

3100

999

2067

3100

3100

999

2067

3100

3100

999

2067

3100

2. All pipe sizes are in inches. Equivalent sizes in millimeters follow: in.

1 /

2

5 /

8

3 /

4 mm

12.7

15.9

19.1

2

1.62 (41)

2.00

(51)

OPTIONAL

MOTORIZED

WATER VALVE

CONTROL BOX

COMPRESSOR

ACCESS

PANEL

WATER OUT

WATER CONNECTIONS

WATER IN

5/8” (15.9) OD

COPPER, 1/2” IPT, OR

1/2” EPT

*

11.25 (286)

8.00 MIN

(203)

1.75 (44)

2.25

(57)

OUT

IN

OPTIONAL FLOW

REGULATOR a50-8335

1.84

(77)

Right Hand Configuration

CONDENSATE

5/8" (15.9) ID

VINYL HOSE

OPTI

AUTO

OPTIO

5/8" (15

OD COP

1/2" IPT

1/2" EP

WATER OUT

WATER IN

OUT

IN

AL oW vE

WATER CONNECTIONS

5/8” (15.9) OD

COPPER, 1/2” IPT,

OR 1/2” EPT oNAL

IZED aLVE

2.25

(57) oNNECTIONS

AA) eR, or

*

11.25 (286)

2.00

(51)

8.00 MIN

(203)

2.25

(57)

CONDENSATE

5/8" (15.9) ID

VINYL HOSE

2.72

(96)

Left Hand Configuration

LEGEND

EPT — External Pipe Thread

IPT — Internal Pipe Thread

*Dimension reduced by fitting if selected.

NOTE: Dimensions shown are in inches. Dimensions in parentheses are in millimeters.

1.50 (38) a50-8336

Fig. 1 — 50PEC09-15 Piping Dimensions

3

1.75 (44)

1.50

(38)

OPTIONAL

MOTORIZED

WATER VALVE

CONTROL BOX

COMPRESSOR

ACCESS

PANEL

WATER CONNECTIONS

7/8” (22.2) OD

COPPER, 3/4” IPT, OR

3/4” EPT

WATER

IN

WATER

OUT

*

11.12 (282)

8.00 MIN

(203)

1.75 (44) a50-8337

OPTIONAL AUTO FLOW

VALVE

OUT

IN

OPT

AUT

2.12

(54)

OPT

MOT

WAT

1.84

(47)

CONDENSATE

5/8" (15.9) ID

VINYL HOSE

.875 (

OD C

3/4" IP

3/4" E

Right Hand Configuration

OUT

IN

OPTIONAL

AUTOFLOW

VALVE

1.50

(38)

OPTIONAL

MOTORIZED

WATER VALVE

1.75 (44)

WATER

CONNECTIONS

7/8” (22.2) OD

COPPER, 3/4”

IPT OR 3/4” EPT

2.12

(54)

WATER

IN

WATER

OUT

NS

*

11.12 (282)

8.00 MIN

(203)

2.25

(286)

CONDENSATE

5/8" (15.9) ID

VINYL HOSE

2.72

(96)

Left Hand Configuration

LEGEND

EPT — External Pipe Thread

IPT — Internal Pipe Thread

*Dimension reduced by fitting if selected.

NOTE: Dimensions shown are in inches. Dimensions in parentheses are in millimeters.

BLOWER DECK

BLOWER ACCESS PANEL a50-8338

Fig. 2 — 50PEC18 Piping Dimensions

4

16.0

(406)

5.0

(127)

DISCHARGE

AIR

30

˚

1.75

(44.5)

1.0 (25)

1.0 (25)

Filter located inside and at top of air inlet area. Rotate filter latch forward, filter rack can be pulled forward 75 to

100 mm for filter access

AIR INLET AREA

33.5

(851)

48.0

(1219)

48.0

(1219)

BOTTOM VIEW

CONTROL ACCESS DOOR

FRONT VIEW

3.53

(90)

4.5

(114)

10.0

(254)

.75 (19)

3.00

(76)

AIR

INLET

SIDE

VIEW

11.5

(292)

12.0

(305)

R.H. PIPE AND

ELECTRIC AREA (NOTE 2)

6.88

(174)

1.75

(44)

2.12 (54)

3.5

(89)

25.9

(658)

4.9

(125)

R.H.

REAR

ACCESS

(NOTE 2)

20.0

(508)

REAR VIEW

21.0

(533) a50-8339

1.63

(41)

DAMPER OPENING

11.75

(298)

48.0

(1219)

0.59

(15)

9.81

(249)

4.9

(125)

NOTES:

1. Dimensions are shown in inches. Dimensions in parentheses are in millimeters.

2. Access is reduced if optional disconnect box is selected.

3. Optional autoflow valve, motorized water valve and disconnect box are shown.

Fig. 3 — 50PEC09-15 Bottom Return Cabinet Dimensions — Right Hand Piping

5

16.00

(406)

5.00

(127)

DISCHARGE

AIR

30˚

1.75

(44.5)

1.00(25)

1.00 (25)



AIR INLET AREA

39.50

(1003)

54.00

(1372)

54.00

(1372)

BOTTOM VIEW

CONTROL ACCESS DOOR

FRONT VIEW

3.53

(90)

10.00

(254)

4.50

(114)

3.00

(76)

AIR

INLET

R.H. PIPE AND

ELECTRIC AREA

(NOTE 2)

6.88

(174)

2.12 (54)

0.75 (19)

1.75

(44)

SIDE

VIEW

11.50

(292)

12.00

(305)

3.50

(89)

25.90

(658)

4.90

(125)

RH REAR

ACCESS

(NOTE 2)

20.00

(508)

REAR VIEW

21.00

(533)

1.63

(41)

DAMPER OPENING

11.75

(298)

54.00

(1372)

NOTES:




0.59

(15)

9.81

(249)

4.90

(125) a50-8340

Fig. 4 — 50PEC18 Bottom Return Cabinet Dimensions — Right Hand Piping

6

12.6

(320)

1.5

(38)

DISCHARGE

AIR

30°

1.75

(44.5)

6.88

(174)

10.0

(254)

2.12 (54)

1.75

(44)

3.00

(76)



AIR INLET AREA

33.5

(851)

48.0

(1219)

CONTROL ACCESS DOOR

FRONT VIEW

3.53

(90)

48.0

(1219)

L.H. PIPE AND

ELECTRIC AREA

NOTE 2

0.75

(19)

BOTTOM VIEW

4.5

(114)

AIR

INLET

1 (25)

1 (25)

SIDE

VIEW

11.5

(292)

12.0

(305)

3.5

(89)

25.9

(658)

4.9

(125)

REAR VIEW

L.H.

REAR

ACCESS

(NOTE 2)

1.63

(41)

DAMPER OPENING

11.75

(298)

48.0

(1219)

NOTES:




0.59

(15)

9.9

(251)

20.0

(508)

21.0

(533)

4.9

(125) a50-8341

Fig. 5 — 50PEC09-15 Bottom Return Cabinet Dimensions — Left Hand Piping

7

12.60

(320)

1.50

(38)

DISCHARGE

AIR

30˚

1.75

(44.5)

2.12 (54)

6.88

(174)

10.00

(254)

1.75

(44)

3.00

(76)



CONTROL ACCESS DOOR

FRONT VIEW

3.53

(90)

AIR INLET AREA

39.50

(1003)

54.00

(1372)

54.00

(1372)

L.H. PIPE AND

ELECTRIC AREA

(Note 2)

BOTTOM VIEW

0.75

(19)

4.50

(114)

AIR

INLET

1.00 (25)

1.00 (25)

SIDE

VIEW

11.50

(292)

12.00

(305)

3.50

(89)

25.90

(658)

4.90

(125)

REAR VIEW

REAR

ACCESS

(Note 2)

20.00

(508)

21.00

(533)

1.63

(41)

DAMPER OPENING

11.75

(298)

54.00

(1372)

NOTES:




0.59

(15)

9.90

(251)

4.90

(125) a50-8342

Fig. 6 — 50PEC18 Bottom Return Cabinet Dimensions — Left Hand Piping

8

21.0

(533)

12.0

(305)

16.0

(406)

5.0

(127)

DISCHARGE

AIR

30 ˚

CONTROL ACCESS DOOR

FRONT VIEW

SIDE

VIEW

7.9

(201)

AIR

INLET

48.0

(1219)

43.7

(1110)

Filter located behind return air grille and requires removal of cabinet front for access.

48.0

(1219)

BOTTOM VIEW

12.0

(305)

.50 (13)

11.50

(292)

R.H. PIPE AND

ELECTRIC AREA

.75 (19)

4.12

(105)

1.0 (25) 4.5

(114)

1.0 (25)

REAR VIEW

20.0

(508)

21.0

(533)

R.H.

REAR

ACCESS

(NOTE 2)

48.0

(1219)

NOTES:




a50-8343

Fig. 7 — 50PEC09-15 Front Return Cabinet Dimensions — Right Hand Piping

3.5

(89)

21.0

(533)

9

21.00

(533)

12.00

(305)

1.00(25)

4.12

(105)

1.00(25)

16.00

(406)

5.00

(127)

DISCHARGE

AIR

30˚

CONTROL ACCESS DOOR

FRONT VIEW

SIDE

VIEW

7.90

(201)

AIR

INLET

54.00

(1372)

48.00

(1219)


54.00

(1372)

.50 (13)

R.H. PIPE AND

ELECTRIC AREA

(NOTE 2)

BOTTOM VIEW 11.50

(292)

12.00

(305)

4.12

(105)

.75 (19)

3.50

(89)

21.00

(533)

REAR VIEW

20.00

(508)

21.00

(533)

RH REAR

ACCESS

(NOTE 2)

54.00

(1372)

NOTES:




a50-8344

Fig. 8 — 50PEC18 Front Return Cabinet Dimensions — Right Hand Piping

10

°

(89)

.50 (13)

11.50

(292)

.75

(19)

4.12

(105)

(Note 2)

L.H.

(NOTE 2)

NOTES:




a50-8345

Fig. 9 — 50PEC09-15 Front Return Cabinet Dimensions — Left Hand Piping

11

12.60

(320)

1.50

(38.1)

DISCHARGE

AIR

30˚

3.50

(89)

CONTROL ACCESS DOOR

FRONT VIEW

21.00

(533)

7.90

(201)

AIR

INLET

.50

(13)

11.50

(292)

.75

(19)

4.12

(105)

54.00

(1372)

48.00

(1219)


54.00

(1372)

L.H. PIPE AND

ELECTRIC AREA

(Note 2)

BOTTOM VIEW

4.50

(114)

1.00 (25)

1.00 (25)

SIDE

VIEW

12.00

(305)

21.00

(533)

REAR VIEW

REAR

ACCESS

(Note 2)

20.00

(508)

21.00

(533)

54.00

(1372)

NOTES:




a50-8346

Fig. 10 — 50PEC18 Front Return Cabinet Dimensions — Left Hand Piping

12

13 a50-8347

a50-8348

14

15

16

CAUTION

All refrigerant discharged from this unit must be recovered without exception. Technicians must follow industry accepted guidelines and all local, regional, and national statutes for the recovery and disposal of refrigerants.

CAUTION

When a compressor is removed from this unit, system refrigerant circuit oil will remain in the compressor. To avoid leakage of compressor oil, the refrigerant lines of the compressor must be sealed after it is removed.

Step 2 — Check Unit —

Upon receipt of shipment at the jobsite, carefully check the shipment against the bill of lading. Make sure all units have been received. Inspect the carton or crating of each unit, and inspect each unit for damage. Ensure the shipping company makes proper notation of any shortages or damage on all copies of the freight bill. Concealed damage not discovered during unloading must be reported to the shipping company within 15 days of receipt of shipment.

NOTE: It is the responsibility of the purchaser to file all necessary claims with the shipping company.

STORAGE

CAUTION

DO NOT store or install console units in corrosive environments or in locations subject to temperature or humidity extremes (e.g., attics, garages, rooftops, etc.). Corrosive conditions and high temperature or humidity can significantly reduce performance, reliability, and service life.

Always move units in an upright position. Tilting units on their sides may cause equipment damage.

Upon the arrival of equipment at the jobsite, immediately store units in their shipping cartons in a clean, dry area. Store units in an upright position at all times. Stack units a maximum of 3 units high. Use pallets to separate each layer of units. DO NOT remove equipment from shipping cartons until equipment is required for installation.

UNIT PROTECTION — Cover console units on the jobsite with either shipping cartons, vinyl film, or an equivalent protective covering. Cap the open ends of pipes stored on the jobsite. In areas where painting, plastering, or the spraying of fireproof material has not been completed, all due precautions must be taken to avoid physical damage to the units and contamination by foreign material. Physical damage and contamination may prevent proper start-up and may result in costly equipment clean-up.

Examine all pipes, fittings, and valves before installing any of the system components. Remove any dirt found on these components.

Step 3 — Mount Unit

1. Unpack the unit from the shipping carton. Remove the front cabinet by lifting up and away from the backplate.

Protect the cabinet from damage during installation by returning it to its original vinyl pack until required.

2. Remove compressor isolation plate shipping bolts (4), as shown in Fig. 15.

3. Using a carpenter’s square and a level, ensure the unit is level. Shim the unit if necessary to assure proper installation.

Poor or inadequate installation may result in noisy unit operation or unattractive appearance.

4. Select the proper fasteners to connect the backplate securely to the wall.

5. Fasten the backplate onto the wall through the screw holes located in the back flange. Secure the subbase in place.

Step 4 — Wire Electrical Connections

WARNING

To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position during installation.

CAUTION

Use only copper conductors for field-installed electrical wiring. Unit terminals are not designed to accept other types of conductors.

All field-installed wiring, including the electrical ground,

MUST comply with National Electrical Code (NEC, U.S.A.) as well as all applicable local codes. In addition, all field wiring must conform to the Class II temperature limitations described in the NEC.

Consult the unit wiring diagram located on the inside of the compressor access panel to ensure proper electrical hookup. The installing (or electrical) contractor must make the field connections shown in Fig. 16 when using field-supplied disconnect.

Refer to unit wiring diagrams Fig. 17-24 for a schematic of the field connections, which must be made by the installing (or electrical) contractor. Operating voltage must be within voltage range shown in Table 2.

SHIPPING

BOLTS

Fig. 15 — Remove 4 Shipping Bolts on

Compressor Isolator Plate

A

FIELD SUPPLIED

DISCONNECT SWITCH

HEAT PUMP

B

ROOM THERMOSTAT

17

WARNING

Disconnect electrical power source to prevent injury or death from electrical shock.

CAUTION

Use copper conductors only to prevent equipment damage.

A = Two power wires.

B = 1 heat/1 cool/manual or auto changeover remote 24-V thermostat.

NOTE: All customer-supplied wiring to be copper only and must conform to national and local electrical codes. Wiring shown with dashed lines must be field-supplied and field-installed. “B” wiring only required with systems using remote-mounted thermostats.

Fig. 16 — Typical Field-Installed Wiring

10

Complete C

Complete C

LEGEND

AL

BM

BR

CAP

CB

CO

CR

DM

— Alarm Relay Contacts

— Blower Motor

— Blower Relay

— Capacitor

— Circuit Breaker

— Sensor, Condensate Overflow

— Compressor Relay

— Damper Motor

ES

FP1

FP2

HPS

— End Switch

— Sensor, Water Coil Freeze Protection

— Sensor, Air Coil Freeze Protection

— High Pressure Switch

HPWS — High Presure Water Switch

JW1 — Jumper Wire for Alarm

LOC — Loss of Charge Pressure Switch

PDB

RAS

RVS

— Power Distribution Block

— Return Air Sensor

— Reversing Valve Solenoid

TRANS — Transformer

WV — Water Valve

---------Field Line Voltage Wiring

Field Low-Voltage Wiring

Printed Circuit Trace

Option Low Voltage Wiring

Relay/Contactor Coil

Solenoid Coil

Thermistor

Circuit Breaker

Relay Contacts-N.O.

Switch-Temperature

Switch-High Pressure

Switch-Low Pressure

Ground

Wire Nut

Mate-N-Lok

*Optional wiring.

†Registered trademark of AMP Incorporated.

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with local codes.

3. Transformer is wired to 240-V (ORG) lead for

240-1-50 units. For 220-1-50 operation, switch the RED and ORG leads at L1 and insulate the

RED lead. Transformer is energy limiting or may have a circuit breaker.

4. FP1 thermistor provides freeze protection for water. When using anti-freeze solutions, cut

JW3 jumper.

5. For remote sensor, position jumper J1 on upper

2 pins.

6. For metric display, position jumper on 1 pin.

7. Transformer secondary ground via GRN/YEL wire from C to control box.

8. Mate-N-Lok† plug is optional.

9. See view A for wiring of units with water valve

(part no. 23B00112N01) or view B for units with water valve (part no. 23B00112N03).

10. Factory cut jumper (JW1). Dry contact will be available between AL1 and AL2.

Fig. 17 — 50PEC Unit Manual or Auto Changeover with Complete C Controller Wiring

18

Complete C

Complete C

LEGEND

AL

BM

BR

CAP

CB

CO

CR

DM


— Blower Motor

— Blower Relay

— Capacitor

— Circuit Breaker



— Damper Motor

ES

FP1

FP2

FSS

— End Switch



— Fan Speed Switch

HP

HPS

— High-Pressure Switch


HPWS — High-Pressure Water Switch


LOC

LON

PB

RVS

—

—

—

—

Loss of Charge Pressure Switch

Local Operating Network

Power Terminal Block

Reversing Valve Solenoid


WV — Water Valve



Option Low-Voltage Wiring



Solenoid Coil

Thermistor

Circuit Breaker

Relay Contacts-N.O.

Switch-Temperature


Switch-Low Pressure

Ground

Wire Nut

Mate-N-Lock

*Optional wiring.

NOTES:






4. FP1 thermistor provides freeze protection for water. When using anti-freeze solutions, cut JW3 jumper.

5. Low voltage wiring must be class 1 and voltage rated equal or greater than unit supply voltage.





Fig. 18 — 50PEC Unit with Complete C and LON Controllers

19

Deluxe D

Deluxe D

LEGEND

AL

BM

CAP

CB

CO

CR

DM

ES


— Blower Motor

— Capacitor

— Circuit Breaker



— Damper Motor

— End Switch

FP1

FP2

FSS

HP





HPS — High-Pressure Switch


JW4

LOC

— Jumper Wire for Alarm

— Loss of Charge Pressure Switch

LON

PB

— Local Operating Network

— Power Terminal Block

RVS — Reversing Valve Solenoid


WV — Water Valve





Solenoid Coil

Thermistor

Circuit Breaker

Relay Contacts-N.O.

Switch-Temperature


Switch-Low Pressure

Ground

Wire Nut

Mate-N-Lock

*Optional wiring.

NOTES:






4. FP1 thermistor provides freeze protection for

WATER. When using anti-freeze solutions, cut

JW3 jumper.






Fig. 19 — 50PEC Unit with Deluxe D and LON Controllers

20

9

Deluxe D

Deluxe D

LEGEND

AL

BM

BR

CAP

CB

CO

CR


— Blower Motor

— Blower Relay

— Capacitor

— Circuit Breaker



DM

ES

FP1

FP2

— Damper Motor

— End Switch



HPS — High-Pressure Switch


JW4

LOC



NLL

PB

RAS

RVS

— Night Low Limit Switch


— Return Air Sensor



WV — Water Valve




*Optional wiring.


Solenoid Coil

Thermistor

Circuit Breaker

Relay Contacts-N.O.

Switch-Temperature


Switch-Low Pressure

Ground

Wire Nut

Mate-N-Lock

NOTES:






4. FP1 thermistor provides freeze protection for

WATER. When using anti-freeze solutions, cut

JW3 jumper.

5. For remote sensor, position jumper J1 on upper

2 pins.

6. For metric display, position jumper on 1 pin.





Fig. 20 — 50PEC Unit Manual or Auto Changeover and Deluxe D Controller

21

Complete C

Complete C

LEGEND

AL

BM

BR

CAP

CB

CO

CR


— Blower Motor

— Blower Relay

— Capacitor

— Circuit Breaker



DM

ES

FP1

FP2

— Damper Motor

— End Switch



FSS

HPS





LOC

PDB


— Power Distribution Block

RVS — Reversing Valve Solenoid


WV — Water Valve




Option Low Voltage

Wiring


Solenoid Coil

Thermistor

Circuit Breaker

Relay Contacts-N.O.


Switch-Low Pressure

Ground

Wire Nut

Mate-N-Lock

*Optional wiring.

NOTES:






4. FP1 thermistor provides freeze protection for water. When using anti-freeze solutions, cut

JW3 jumper.






Fig. 21 — 50PEC Unit Remote-Mounted Thermostat with Complete C Controller Wiring

22

Deluxe D

Deluxe D

LEGEND

AL

BR

CAP

CB

CO

CR

DM

FP1


— Blower Relay

— Capacitor

— Circuit Breaker



— Damper Motor


FP2

FSS

HP

JW4

LOC

NLL

PB

RVS






— Night Low Limit




WV — Water Valve




Option Low Voltage Wiring


Solenoid Coil

Thermistor

Circuit Breaker

Relay Contacts-N.O.


Switch-Low Pressure

Ground

Wire Nut

Mate-N-Lock

*Optional wiring.

NOTES:



3. Transformer is wired to 240-V (ORG) lead for 240-

1-50 units. For 220-1-50 operation, switch the RED and ORG leads at L1 and insulate the RED lead.

Transformer is energy limiting or may have a circuit breaker.

4. FP1 thermistor provides freeze protection for water. When using anti-freeze solutions, cut JW3 jumper.




8. See view A for wiring of units with water valve (part no. 23B00112N01) or view B for units with water valve (part no. 23B00112N03).

Fig. 22 — 50PEC Unit Remote-Mounted Thermostat with Deluxe D Controller Wiring

23

PREMIER

LINK

PWR

HS1/EXH/RVS

CR

LEGEND

CR — Control Relay

LWT — Leaving Water Temperature Sensor

SAT — Supply Air Temperature Sensor

SPT — Space Temperature Sensor

NOTE: Reversing valve is on in Cooling mode.

CMP1

FAN

J6 J5 J4

S

P

T

S

A

T

L

W

T

Fig. 23 — PremierLink™ Controller Applications with Complete C Control

PREMIER

LINK

PWR

LEGEND

LWT — Leaving Water Temperature Sensor

SAT — Supply Air Temperature Sensor

SPT — Space Temperature Sensor

NOTE: Reversing valve is on in Cooling mode.

HS2

HS1

CMP2

CMP1

FAN

J6 J5 J4

DELUXE

D

CONTROL

Y1

Y2

W1

O/W2

G

R

C

AL1

S

P

T

S

A

T

L

W

T

Fig. 24 — PremierLink Controller Applications with Deluxe D Control

24

CR

COMPLETE

C

CONTROL

Y

W

O

G

R

C

AL1

AL2

A

Table 2 — Electrical Data — 50PEC Units

50PEC

UNIT SIZE

09

12

15

18

VOLTAGE

CODE

7

7

7

7

V-Ph-Hz

220/240-1-50

220/240-1-50

220/240-1-50

220/240-1-50

MIN/MAX

VOLTAGE

198-264

198-264

198-264

198-264

LEGEND

FLA — Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration

LRA — Locked Rotor Amps

RLA — Rated Load Amps

QTY

COMPRESSOR

RLA LRA

1

1

3.2

4.0

17

19

1

1

4.7

5.6

23

25

FAN MOTOR

FLA

0.4

0.4

0.6

0.6

TOTAL UNIT

FLA

MIN CIRCUIT

AMPS

3.6

4.4

5.3

6.2

4.4

5.4

6.5

7.6

MAX FUSE/

HACR

15.0

15.0

15.0

15.0

Make all final electrical connections with a length of flexible conduit to minimize vibration and sound transmission to the building.

SUPPLY VOLTAGE — Operating voltage to unit must be within voltage range indicated on unit nameplate.

EXTERNAL LOOP POWER CONNECTION — If the unit will be connected to an external loop pump or flow controller, connect the pump to the loop pump terminal block PB1. The maximum power handling is 4 amps at 240-v. The pumps will automatically cycle as required by the unit.

220-V OPERATION — All 220/240-v units are factorywired for 240-v. The transformer wiring may be switched for

220-v operation (as illustrated on the wiring diagrams) by switching the RED and ORG leads at L1.

Step 5 — Wire Low Voltage Connections

WATER FREEZE PROTECTION — The Aquazone™ control allows the field selection of source fluid freeze protection points through jumpers. The factory setting of jumper JW3

(FP1) is set for water at –1.1 C. In earth loop applications, jumper JW3 should be clipped to change the setting to 12.2 C when using antifreeze in colder earth loop applications. See

Fig. 25.

Terminal Strip

C

A

24 VAC

Typical

Water

Valve

Fig. 26 — Typical Aquazone Accessory Wiring

WATER SOLENOID VALVES — An external solenoid valve(s) should be used on ground water installations to shut off flow to the unit when the compressor is not operating. A slow closing valve may be required to help reduce water hammer. Figure 26 shows typical wiring for a 24-vac external solenoid valve. Figures 27 and 28 illustrate typical slow closing water control valve wiring for Taco 500 Series and Taco ESP

Series valves. Slow closing valves take approximately 60 sec.

to open (very little water will flow before 45 sec.). Once fully open, an end switch allows the compressor to be energized (only on valves with end switches). Only relay or triac based electronic thermostats should be used with slow closing valves.

When wired as shown, the slow closing valve will operate properly with the following notations:

1. The valve will remain open during a unit lockout.

2. The valve will draw approximately 25 to 35 VA through the “Y” signal of the thermostat.

IMPORTANT: Connecting a water solenoid valve can overheat the anticipators of electromechanical thermostats. Only use relay based electronic thermostats.

a50-7467tf a50-8441

1

2

HEATER SWITCH

3

AMV

TACO VALVE

AQUAZONE CONTROL (Complete C Control Shown)

Fig. 25 — Typical Aquazone Control Board

Jumper Locations

ACCESSORY CONNECTIONS — Terminal labeled A on the control is provided to control accessory devices such as water valves, electronic air cleaners, humidifiers, etc. This signal operates with the compressor terminal. See Fig. 26.

Refer to the specific unit wiring schematic for details.

NOTE: The A terminal should only be used with 24-v signals

— not line voltage signals.

THERMOSTAT

Fig. 27 — AMV Valve Wiring

25

a50-8442

Fig. 28 — Taco SBV Valve Wiring

OPTIONAL WALL-MOUNTED THERMOSTAT —

The 50PEC water source heat pump units are built with standard internal thermostats in either manual changeover (MCO) or automatic changeover (ACO) configuration. Refer to

Fig. 17-20.

When desired, the unit can be furnished with a 24-v control circuit which is field wired to a Carrier-supplied accessory remote thermostat. Most heat pump thermostats can be used with the controller. Use a thermostat with Y, G, O and W outputs.

Refer to unit wiring diagrams in Fig. 21 and 22 and Aquazone™ Controls, Operation, and Troubleshooting Instructions for additional information.

Vendor installation instructions and additional installation information is shipped with each thermostat.

NOTE: Low-voltage wiring between the unit and the wall thermostat must comply with all applicable electrical codes

(i.e., NEC and local codes), and be completed before the unit is installed.

Table 3 lists recommended wire sizes and lengths to install the thermostat. The total resistance of low-voltage wiring must not exceed 1 ohm. Any resistance in excess of 1 ohm may cause the control to malfunction because of high voltage drop.

Table 3 — Recommended Thermostat Wire Sizes

WIRE SIZE

18-Gage

16-Gage

14-Gage

MAX WIRE LENGTH*

20 m

35 m

60 m

*Length = Physical distance from thermostat to unit.

OPTIONAL PREMIERLINK™ CONTROLLER — This direct digital controller (DDC) allows the water source heat pump to be incorporated into a Carrier Comfort Network ®

(CCN) system installation. PremierLink control is factoryinstalled with the Complete C controller, or field-installed with the Deluxe D control option. Refer to Fig. 23 and 24.

Step 6 — Install Supply and Return Piping

CAUTION

To ensure proper functioning of unit and system, be sure to connect entering water to upper pipe on right-hand units.

On left-hand units, connect entering water to lower pipe.

Failure to do so could result in equipment damage.

SUPPLY AND RETURN HOSES — Optional pressure-rated hose assemblies are available for use with units. Use the following guidelines when installing supply and return hose assemblies.

1. Install supply and return hoses fitted with swivel-joint fittings at one end to prevent the hose from twisting.

2. Use male adapters to secure the hose assembly to the unit and the riser.

3. Do not allow the hose to twist during installation. Twisting may damage the hose wall or the rubber compound.

26

* Registered trademark of DuPont.

4. Use pipe joint compound sparingly on the fitting adapters’ male pipe threads.

5. Prevent sealant from reaching the joint’s flared surfaces.

6. Do not use pipe joint compound when Teflon* thread tape is pre-applied to hose assemblies or when flared-end connections are used.

7. Maximum torque that may be applied to brass fittings is

40 N m. When a torque wrench is not used, tighten brass fittings finger-tight plus one quarter turn.

8. Tighten steel fittings as necessary.

9. Use shut-off/balancing valves, flow indicators, and drain tees in the supply runout and return at each floor to aid in loop balancing and servicing.

SUPPLY AND RETURN PIPING — System piping MUST comply with all applicable codes.

1. Install a drain valve at the base of each supply and return riser to enable system flushing at start-up and during routine servicing.

2. Install shut-off/balancing valves and unions at each unit to allow unit removal for servicing.

NOTE: If flex hoses are used, unions are not necessary.

3. Install strainers at the inlet of each system circulating pump.

IMPORTANT: Since loop temperatures are normally between 15.6 C and 32.2 C, pipe sweating and heat loss do not occur at normal ambient temperature conditions. Insulation must be installed on loop water piping on those sections that run through unheated areas or are located outside the building. If loop temperatures are expected below the ambient dew point, the optional internal insulation

(extended range) package must be ordered.

CAUTION

DO NOT bend or kink supply lines or hoses. Damage to unit may result.

4. Before making the final water connections, flush the system as described in the Pre-Start-Up section of this manual. After flushing the system, connect piping and hoses to the proper supply, return and condensate connections of the unit.

NOTE: When necessary, use adapters to connect hoses.

5. Install any other system components, as required, following manufacturer’s instructions.

6. Reinstall the front cabinet by carefully lowering the front cabinet over the chassis onto the backplate.

Step 7 — Install Condensate Piping —

Connect the unit condensate drain to the building condensate drain with a flexible, nonpressure-rated 5 /

8

-in. (16 mm) ID plastic hose.

Avoid kinks in this hose to ensure an unobstructed flow of condensate from the unit to the drain.

The horizontal run of the condensate hose is usually too short to pose any drainage problems, however, the horizontal run of condensate line should be pitched at least 10 mm for every 1 m of run (in the direction of flow). Avoid low points and unpitched piping since dirt collects in these areas and may cause stoppage and overflow.

Field installation of a trap or vent is not required unless specified by local codes. The 50PEC units are designed in a blow-thru configuration. The condensate drain pan is located on the outlet side of the blower so that the pressure in the drain pan is higher than the atmospheric pressure.

PRE-START-UP

System Cleaning and Flushing —

Cleaning and flushing the unit and system is the single most important step to ensure proper start-up and continued efficient operation of the system.

WARNING

To prevent injury or death due to electrical shock or contact with moving parts, open unit disconnect before servicing unit.

Follow the instructions below to properly clean and flush the system:

CAUTION

Do not flush system through the unit. Damage to unit could result.

1. Verify that electrical power to the units is disconnected, and that the circulation pump is deenergized.

2. Connect the supply hose directly to the return riser valve.

Use a single length of flexible hose, as shown in Fig. 29.

NOTE: If the length of hose is too short (i.e., the resulting connection would exceed the minimum bend radius of the hose), substitute two lengths of flexible hose joined together with a field-supplied, standard NPT coupling and the flare-fitting-topipe adapters provided with the hose kit (Fig. 29).

3. Open all air vents. Fill the system with water. Do not allow system to overflow. Bleed all air from the system.

Check the system for leaks and repair appropriately.

4. Check and adjust the water and air level in the expansion tank.

5. Verify all strainers are in place. Start the pumps, and systematically check each vent to ensure all air is bled from the system.

6. Verify make-up water is available. Adjust make-up water appropriately to replace the air that was bled from the system. Pressure test and inspect the system for leaks and make any necessary repairs. Check and adjust the water and air level in the expansion tank.

7. Open a drain at the lowest point in the system. Adjust the make-up water replacement rate to equal the rate of bleed.

Continue to bleed the system until the water appears

.

clean or for at least three hours, whichever is longest; then, completely drain the system.

8. Refill the system with clean, chemically treated water.

Since water varies for each locality, contact a local water treatment company for the correct treatment chemicals to use in the area. Set the boiler to raise the loop temperature to approximately 29.4 C.

CAUTION

To avoid possible damage to piping systems constructed of plastic piping DO NOT allow loop temperature to exceed

43.3 C.

Circulate the solution for a minimum of 8 to 24 hours. At the end of this period, shut off the circulating pump and drain the solution. Repeat system cleaning as necessary.

9. When the cleaning process is complete, remove the shortcircuited hoses. Connect the hoses to the proper supply and return connections on each unit. Refill the system and bleed off all air.

10. Test the system pH with litmus paper. The system water should be slightly alkaline (pH 7.0 to 8.5). Add chemicals, as appropriate, to maintain acidity levels.

CAUTION

DO NOT use “Stop-Leak” or any similar chemical agent in this system. Addition of these chemicals to the loop water will foul the system and will inhibit unit operation.

11. When the system is successfully cleaned, flushed, refilled and bled, check the main system panels, safety cutouts and alarms. Set the controls to properly maintain loop temperatures.

System Checkout —

When the installation is complete and the system is cleaned and flushed, follow the system checkout procedure outlined below.

1. Voltage: Ensure voltage is within the utilization range specifications of the unit compressor and fan motor.

2. System Water Temperature: Ensure temperature is within an acceptable range shown in Table 4. (When conducting this check, also verify proper heating and cooling set points.)

1/2” Flexible Hose

Supply Valve

Floor Line

Brass Adapter

(1/2” MPT x 1/2”

Male Flare)

Return Valve

NOTE: Use standard coupling (field-supplied) and hose adapters to join 2 hoses.

Fig. 29 — Temporary Connection for Flushing System Piping

27

Table 4 — Air and Water Limits

50PEC UNIT

Min Ambient Air

Rated Ambient Air

Max Ambient Air

Min Entering Air

Rated Entering Air, dry bulb/wet bulb

Max Entering Air, dry bulb/wet bulb

Min Entering Water

Normal Entering Water

Max Entering Water

COOLING (C) HEATING (C)

10.0

10.0

26.7

37.8

10.0

26.7/19.4

37.8/28.3

–1.1

29.4

43.3

21.1

29.4

10.0

21.1

26.7

–6.7

21.1

32.2

NOTES:

1. Minimum air and water conditions can only be used at nominal flow rates.

2. 50PEC units may have up to two values at maximum or minimum with all other parameters at normal conditions.

3. Operating limits shown are for start-up, not continuous operation. It is assumed that such a start-up is for the purpose of bringing the space to desired occupancy temperature.

3. System Water pH: Verify system water is slightly alkaline

(pH = 7.5 to 8.5). Proper pH promotes the longevity of the hoses and heat exchangers. See Table 5.

4. Closed-Type Cooling Tower (Open Tower with Heat Exchanger): Check equipment for proper temperature set points and operation.

5. Balanced Water Flow Rate to Heat Pump: Record the inlet and outlet water temperatures as each heat pump unit is started. This check will eliminate nuisance unit tripouts resulting from water velocities that are either too low or too high; it can also prevent erosive water flow rates.

6. Standby Pump: Verify the standby pump is properly installed and in operating condition.

Table 5 — Water Quality Guidelines

CONDITION

HX

MATERIAL*

CLOSED

RECIRCULATING†

OPEN LOOP AND RECIRCULATING WELL**

Scaling Potential — Primary Measurement

Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below.

pH/Calcium

Hardness Method

All N/A pH < 7.5 and Ca Hardness, <100 ppm

Index Limits for Probable Scaling Situations (Operation outside these limits is not recommended.)

Scaling indexes should be calculated at 150 F for direct use and HWG applications, and at 90 F for indirect HX use. A monitoring plan should be implemented.

Ryznar Stability Index

All N/A

6.0 - 7.5

If >7.5 minimize steel pipe use.

Langelier Saturation Index

All N/A

–0.5 to +0.5

If <–0.5 minimize steel pipe use.

Based upon 150 F HWG and direct well, 85 F indirect well HX.

Iron Fouling

Iron Fe 2+ (Ferrous)

(Bacterial Iron Potential)

Iron Fouling

All

All

N/A

N/A

<0.2 ppm (Ferrous)

If Fe 2+ (ferrous) >0.2 ppm with pH 6 - 8, O

2

<5 ppm check for iron bacteria.

<0.5 ppm of Oxygen

Above this level deposition will occur.

Corrosion Prevention†† pH

Hydrogen Sulfide (H

2

S)

All

All

6 - 8.5

Monitor/treat as needed.

N/A

6 - 8.5

Minimize steel pipe below 7 and no open tanks with pH <8.

<0.5 ppm

At H

2

S>0.2 ppm, avoid use of copper and cupronickel piping of HXs.

Rotten egg smell appears at 0.5 ppm level.

Copper alloy (bronze or brass) cast components are okay to <0.5 ppm.

<0.5 ppm Ammonia Ion as Hydroxide,

Chloride, Nitrate and Sulfate

Compounds

Maximum Chloride Levels

All N/A

Copper

Cupronickel

304 SS

316 SS

Titanium

N/A

N/A

N/A

N/A

N/A

Maximum allowable at maximum water temperature.

50 F (10 C) 75 F (24 C) 100 F (38 C)

<20 ppm

<150 ppm

<400 ppm

<1000 ppm

>1000 ppm

NR

NR

<250 ppm

<550 ppm

>550 ppm

NR

NR

<150 ppm

<375 ppm

>375 ppm

Erosion and Clogging

Particulate Size and Erosion

Brackish

All

All

<10 ppm of particles and a maximum velocity of 6 fps.

Filtered for maximum

800 micron size.

<10 ppm (<1 ppm “sandfree” for reinjection) of particles and a maximum velocity of 6 fps. Filtered for maximum 800 micron size. Any particulate that is not removed can potentially clog components.

N/A

Use cupronickel heat exchanger when concentrations of calcium or sodium chloride are greater than 125 ppm are present. (Seawater is approximately

25,000 ppm.)

LEGEND

HWG — Hot Water Generator

HX — Heat Exchanger

N/A — Design Limits Not Applicable Considering Recirculating

Potable Water

NR — Application Not Recommended

SS — Stainless Steel

*Heat exchanger materials considered are copper, cupronickel, 304 SS

(stainless steel), 316 SS, titanium.

†Closed recirculating system is identified by a closed pressurized piping system.

**Recirculating open wells should observe the open recirculating design considerations.

††If the concentration of these corrosives exceeds the maximum allowable level, then the potential for serious corrosion problems exists.

Sulfides in the water quickly oxidize when exposed to air, requiring that no agitation occur as the sample is taken. Unless tested immediately at the site, the sample will require stabilization with a few drops of one

Molar zinc acetate solution, allowing accurate sulfide determination up to 24 hours after sampling. A low pH and high alkalinity cause system problems, even when both values are within ranges shown. The term pH refers to the acidity, basicity, or neutrality of the water supply.

Below 7.0, the water is considered to be acidic. Above 7.0, water is considered to be basic. Neutral water contains a pH of 7.0.

To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is equivalent to ppm.

28

7. System Control: To ensure no catastrophic system failures occur, verify system controls are functioning and the sequencing is correct.

8. Freeze Protection for Water Systems: Verify freeze protection is provided for the outdoor portion of the loop water system. Inadequate freeze protection leads to expensive repairs.

CAUTION

To avoid equipment damage, DO NOT leave system filled in a building without heat during the winter unless antifreeze is added to system water. Condenser coils never fully drain by themselves and will freeze unless winterized with antifreeze.

9. System Water Loop: Verify all air is bled from the system. Air in the system impedes unit operation and causes corrosion in the system piping.

10. Unit Filters: To avoid system damage and to provide maximum performance, ensure the unit filter is clean.

11. Unit Fans: Manually rotate fans to assure free rotation.

Ensure fans are properly secured to the fan shaft. Do not oil fan motors on start-up since they are lubricated at the factory.

12. System Control Center: To ensure control of the temperature set points for operation of the system’s heat rejector and boiler, examine the system control and alarm panel for proper installation and operation.

FIELD SELECTABLE INPUTS

Jumpers and DIP (dual in-line package) switches on the control board are used to customize unit operation and can be configured in the field.

IMPORTANT: Jumpers and DIP switches should only be clipped when power to control board has been turned off.

Complete C Control Jumper Settings (See

Fig. 17, 18, and 21)

WATER COIL FREEZE PROTECTION (FP1) LIMIT

SETTING — Select jumper 3, (JW3-FP1 Low Temp) to choose FP1 temperature limit of –12.2 C or –1.1 C. To select

–1.1 C as the temperature limit, DO NOT clip the jumper. To select –12.2 C as the limit, clip the jumper.

ALARM RELAY SETTING — Select jumper 1 (JW1) for connecting alarm relay terminal (AL2) to 24-vac (R) or to remain as a dry contact (no connection). To connect AL2 to R, do not clip the jumper. To set as dry contact, clip the jumper.

Complete C Control DIP Switches —

The Complete C control has one DIP switch block with five switches.

See Fig. 17, 18, and 21.

PERFORMANCE MONITOR (PM) — DIP switch 1 will enable or disable this feature. To enable the PM, set the switch to ON. To disable the PM, set the switch to OFF.

STAGE 2 — DIP switch 2 will enable or disable compressor delay. Set DIP switch to OFF for Stage 2 in which the compressor will have a 3-second delay before energizing.

SWITCH 3 AND SWITCH 4 — Not used.

FREEZE PROTECTION (FP1) — DIP switch 5 is used to initiate one or 3 tries for the FP1 fault. If there is water freeze protection for the water coil then DIP switch 5 can be set to lock out on the FP1 fault after one try. ON = One try.

OFF = 3 tries.

29

Deluxe D Control Jumper Settings (See Fig. 19,

20, and 22)

WATER COIL FREEZE PROTECTION (FP1) LIMIT

SETTING — Select jumper 3, (JW3-FP1 Low Temp) to choose FP1 temperature limit of –12.2 C or –1.1 C. To select

–1.1 C as the temperature limit, DO NOT clip the jumper. To select –12.2 C as the limit, clip the jumper.

ALARM RELAY SETTING — Select jumper 4 (JW4-AL2

Dry) for connecting alarm relay terminal (AL2) to 24-vac (R) or to remain as a dry contact (no connection). To connect AL2 to R, do not clip the jumper. To set as dry contact, clip the jumper.

LOW PRESSURE SETTING — The Deluxe D control can be configured for low pressure setting (LP). Select jumper 1

(JW1-LP Norm Open) for choosing between low pressure input normally opened or closed. To configure for normally closed operation, do not clip the jumper. To configure for normally open operation, clip the jumper.

Deluxe D Control DIP Switches —

The Deluxe D control has 2 DIP switch blocks. Each DIP switch block has

8 switches and is labeled either S1 or S2 on the circuit board.

See Fig. 19, 20, and 22.

DIP SWITCH BLOCK 1 (S1) — This set of switches offers the following options for Deluxe D control configuration:

Performance Monitor (PM) — Set switch 1 to enable or disable performance monitor. To enable the PM, set the switch to

ON. To disable the PM, set the switch to OFF.

Compressor Relay Staging Operation — Switch 2 will enable or disable compressor relay staging operation. The compressor relay can be set to turn on with Stage 1 or Stage 2 call from the thermostat. This setting is used with dual stage units (units with 2 compressors and 2 Deluxe D controls) or in master/slave applications. In master/slave applications, each compressor and fan will stage according to its switch 2 setting.

If switch is set to Stage 2, the compressor will have a 3-second delay before energizing during stage 2 demand.

NOTE: If DIP switch is set for Stage 2, the alarm relay will not cycle during Test mode.

Heating/Cooling Thermostat Type — Switch 3 provides selection of thermostat type. Heat pump or heat/cool thermostats can be selected. Select OFF for heat/cool thermostats. When in heat/cool mode, Y1 is used for Cooling Stage 1, Y2 is used for

Cooling Stage 2, W1 is used for Heating Stage 1 and O/W2 is used for Heating Stage 2. Select ON for heat pump applications. In heat pump mode, Y1 used is for Compressor Stage 1,

Y2 is used for Compressor Stage 2, W1 is used for Heating

Stage 3 or emergency heat, and O/W2 is used for RV (heating or cooling) depending upon switch 4 setting.

O/B Thermostat Type — Switch 4 provides selection for heat pump O/B thermostats. O is cooling output. B is heating output. Select ON for heat pumps with O output. Select OFF for heat pumps with B output.

Dehumidification Fan Mode — Switch 5 provides selection of normal or dehumidification fan mode. Select OFF for dehumidification mode. The fan speed relay will remain OFF during Cooling Stage 2. Select ON for normal mode. The fan speed relay will turn on during Cooling Stage 2 in normal mode.

Switch 6 — Not used.

Boilerless Operation — Switch 7 provides selection of boilerless operation and works in conjunction with switch 8. In boilerless operation mode, only the compressor is used for heating when FP1 is above the boilerless changeover temperature set by switch 8 below. Select ON for normal operation or select OFF for boilerless operation.

Boilerless Changeover Temperature — Switch 8 on S1 provides selection of boilerless changeover temperature set point.

Select OFF for set point of 10.0 C or select ON for set point of

4.4 C.

If switch 8 is set for 10.0 C, then the compressor will be used for heating as long as the FP1 is above 10.0 C. The compressor will not be used for heating when the FP1 is below

10.0 C and the compressor will operate in emergency heat mode, staging on EH1 and EH2 to provide heat. If a thermal switch is being used instead of the FP1 thermistor, only the compressor will be used for heating mode when the FP1 terminals are closed. If the FP1 terminals are open, the compressor is not used and the control goes into emergency heat mode.

DIP SWITCH BLOCK 2 (S2) — The following set of DIP switches is used to configure accessory relay options.

Switches 1 to 3 — These DIP switches provide selection of

Accessory 1 relay options. See Table 6 for DIP switch combinations.

Table 6 — DIP Switch Block S2 —

Accessory 1 Relay Options

ACCESSORY 1

RELAY OPTIONS

Digital NSB

Water Valve — Slow Opening

LEGEND

NSB — Night Setback

DIP SWITCH POSITION

1 2 3

Off

On

On

Off

On

On

NOTE: All other DIP switch combinations are invalid.

Switches 4 to 6 — These DIP switches provide selection of

Accessory 2 relay options. See Table 7 for DIP switch combinations.

Table 7 — DIP Switch Block S2 —

Accessory 2 Relay Options

ACCESSORY 2

RELAY OPTIONS

Digital NSB

Water Valve — Slow Opening

LEGEND

NSB — Night Setback

NOTE: All other switch combinations are invalid.

DIP SWITCH POSITION

4

Off

On

5

On

Off

6

On

On

Auto Dehumidification Mode or High Fan Mode — Switch

7 provides selection of auto dehumidification fan mode or high fan mode. In auto dehumidification fan mode, the fan speed relay will remain off during Cooling Stage 2 if terminal H is active. In high fan mode, the fan enable and fan speed relays will turn on when terminal H is active. Set the switch to ON for auto dehumidification fan mode or to OFF for high fan mode.

Switch 8 — Not used.

Deluxe D Control Accessory Relay Configurations —

The following accessory relay settings are applicable for Deluxe D control only:

CYCLE WITH COMPRESSOR — In this configuration, the relay will be ON any time the compressor relay is on.

DIGITAL NIGHT SETBACK (NSB) — In this configuration, the relay will be ON if the NSB input is connected to ground C.

NOTE: If there are no relays configured for digital NSB, then the NSB and OVR (override) inputs are automatically configured for mechanical operation.

MECHANICAL NIGHT SETBACK — When NSB input is connected to ground C, all thermostat inputs are ignored. A thermostat setback heating call will then be connected to the

OVR input. If OVR input becomes active, then the Deluxe D control will enter night low limit (NLL) staged heating mode.

The NLL staged heating mode will then provide heating during the NSB period.

WATER VALVE (SLOW OPENING) — If relay is configured for water valve (slow opening), the relay will start 60 seconds prior to starting compressor relay.

CAUTION

To avoid equipment damage, DO NOT leave system filled in a building without heat during the winter unless antifreeze is added to system water. Condenser coils never fully drain by themselves and will freeze unless winterized with antifreeze.

START-UP

Use the procedure outlined below to initiate proper unit start-up:

IMPORTANT: This equipment is designed for indoor installation ONLY.

WARNING

When the disconnect switch is closed, high voltage is present in some areas of the electrical panel. Exercise caution when working with the energized equipment.

1. Adjust all valves to the full open position and turn on the line power to all heat pump units.

2. Operate each unit in the Cooling mode first.

Room temperature should be in the normal range

(i.e., approximately 10.0 to 26.7 C dry bulb). Loop water temperature entering the heat pumps should be at least

4.4 C but not in excess of 43.3 C. Refer to Table 8 for more specific information on the operating parameters of units.

IMPORTANT: Three factors determine the operating limits of a unit: (1) return-air temperature, (2) water temperature and (3) ambient temperature. Whenever any one of these factors is at a minimum or maximum level, the other two factors must be at normal levels to ensure proper unit operation. Flow rates must be at nominal AHRI (Air Conditioning, Heating, and Refrigeration Institute) / ISO

(International Organization for Standardization)/ ASHRAE

(American Society of Heating, Refrigerating and Air Conditioning Engineers) 13256-1 standards.

Table 8 — Water Temperature Change

Through Heat Exchanger

WATER FLOW RATE (GPM)

COOLING

RISE (°C)

HEATING

DROP (°C)

Min Max Min Max

For Closed Loop: Ground Source or

Cooling/Boiler Systems at 3.9 L/m per kW

For Open Loop: Ground Water Systems at

2.0 L/m per kW

5.0

6.7

11.1

14.4

2.2

5.6

4.4

9.4

Operating Limits

ENVIRONMENT — This equipment is designed for indoor installation ONLY.

POWER SUPPLY — A voltage variation of ± 10% of nameplate utilization voltage is acceptable.

50PEC UNIT STARTING CONDITIONS — The 50PEC units will start and operate at an ambient temperature of 10.0 C with entering-air temperature at 10.0 C, entering water at

15.6 C, and with both air and water at the flow rates used in the

30

AHRI/ISO/ASHRAE Standard 13256-1 rating test, for initial start-up in winter.

IMPORTANT: These operating limits are not normal or continuous operating conditions. It is assumed that such a start-up is for the purpose of bringing the building space up to occupancy temperature.

Unit Start-Up

1. Turn the thermostat fan position to “ON”. Blower should start.

2. Balance air flow at registers.

3. Adjust all valves to their full open positions. Turn on the line power to all heat pumps.

4. Room temperature should be within the minimum and maximum ranges of Table 4. During start-up checks, loop water temperature entering the heat pump should be between 16 C and 35 C.

5. Two factors determine the operating limits of Carrier heat pumps, return air temperature and water temperature.

When any one of these factors is at a minimum or maximum level, the other factor must be at normal level to ensure proper unit operation.

a. Adjust the unit thermostat to the warmest setting.

Place the thermostat mode switch in the “COOL” position. Slowly reduce thermostat setting until the compressor activates.

b. Check for cool air delivery at the unit grille within a few minutes after the unit has begun to operate.

Units have a five minute time delay in the control circuit that can be eliminated on the control board if needed.

c. Check the elevation and cleanliness of the condensate lines. Dripping may be a sign of a blocked line. Check that the condensate trap is filled to provide a water seal.

d. Check the temperature of both entering and leaving water. See Table 8. If temperature is within range, proceed with the test. If temperature is outside the range, check refrigerant pressures.

e. Check air temperature drop across the air coil when compressor is operating. Air temperature drop should be between 8° C and 14° C. f. Turn thermostat to “OFF” position. A hissing noise indicates proper functioning of the reversing valve.

6. Allow five (5) minutes between tests for pressure to equalize before beginning heating test.

a. Adjust the thermostat to the lowest setting. Place the thermostat mode switch in the “HEAT” position.

b. Slowly raise the thermostat to a higher temperature until the compressor activates. c. Check for warm air delivery within a few minutes after the unit has begun to operate.

d. Refer to Table 8. Check the temperature of both entering and leaving water. If temperature is within range, proceed with the test. If temperature is outside the range, check refrigerant pressures.

e. Check air temperature rise across the air coil when compressor is operating. Air temperature rise should be between 11° C and 17° C.

f. Check for vibration, noise, and water leaks.

7. If unit fails to operate, perform troubleshooting analysis

(see troubleshooting section). If the check described fails to reveal the problem and the unit still does not operate,

31 contact a trained service technician to ensure proper diagnosis and repair of the equipment.

When testing is complete, set system to maintain desired comfort level.

Flow Regulation —

Flow regulation can be accomplished by two methods. Most water control valves have a built-in flow adjustment valve. Determine the flow rate by measuring the pressure drop through the unit heat exchanger.

See Table 9. Adjust the water control valve until a flow of 2.0

to 3.9 L/m per kW cooling is achieved. Since the pressure constantly varies, two pressure gages may be needed.

An alternative method for regulating flow is to install a flow control device. These devices are typically an orifice of plastic material mounted on the outlet of the water control valve, designed to allow a specified flow rate. Occasionally these valves produce a velocity noise that can be reduced by applying some back pressure. To accomplish this, slightly close the leaving isolation valve of the water regulating device.

CAUTION

DO NOT use “Stop Leak” or any similar chemical agent in this system. Addition of these chemicals to the loop water will foul the system and inhibit unit operation.

Antifreeze —

In areas where entering loop temperatures drop below 4.4 C or where piping will be routed through areas subject to freezing, antifreeze is needed.

Alcohols and glycols are commonly used as antifreeze agents. Freeze protection should be maintained to 8.3° C below the lowest expected entering loop temperature. For example, if the lowest expected entering loop temperature is –1.1 C, the leaving loop temperature would be –5.6 to –3.9 C. Therefore, the freeze protection should be at –9.4 C (–1.1 C – 8.3 C =

–9.4 C).

IMPORTANT: All alcohols should be pre-mixed and pumped from a reservoir outside of the building or introduced under water level to prevent alcohols from fuming.

Calculate the total volume of fluid in the piping system. See

Table 10. Use the percentage by volume in Table 11 to determine the amount of antifreeze to use. Antifreeze concentration should be checked from a well mixed sample using a hydrometer to measure specific gravity.

Table 9 — Coaxial Water Pressure Drop

50PEC

UNIT

SIZE

09

12

15

18

L/m

4.2

6.1

8.7

5.7

8.7

11.4

7.2

10.6

14.0

8.7

12.9

17.1

-1 C

11.0

17.9

31.0

14.5

31.0

46.9

10.3

20.7

32.4

15.2

30.3

47.5

PRESSURE DROP (kPa)

10 C 21 C

8.3

15.2

26.2

12.4

26.2

40.0

6.9

15.8

26.9

12.4

26.2

41.3

6.9

13.8

24.1

10.3

24.1

33.8

6.2

13.8

22.7

10.3

23.4

35.8

32 C

6.2

13.1

20.7

9.0

20.7

31.0

5.5

11.7

20.0

9.0

20.7

33.1

Table 10 — Approximate Fluid Volume (L) per 30 M of Pipe

PIPE

Copper

Rubber Hose

Polyethylene

DIAMETER (in.) [mm] VOLUME (gal.) [L]

1 [25.4]

1.25 [31.8]

1.5 [38.1]

4.1 [15.5]

6.4 [24.2]

9.2 [34.8]

1 [25.4]

3 /

4

IPS SDR11

1 IPS SDR11

1 1 /

4

IPS SDR11

1 /

2

IPS SDR11

2 IPS SDR11

1 1 /

4

1 1 /

2

IPS SCH40

IPS SCH40

2 IPS SCH40

3.9 [14.8]

2.8 [10.6]

4.5 [17.0]

8.0 [30.8]

10.9 [41.3]

18.0 [68.1]

8.3 [31.4]

10.9 [41.3]

17.0 [64.4]

LEGEND

IPS — Internal Pipe Size

SCH — Schedule

SDR — Standard Dimensional Ratio

NOTE: Volume of heat exchanger is approximately 3.78 liters.

Table 11 — Antifreeze Percentages by Volume

ANTIFREEZE

Methanol (%)

100% USP Food Grade

Propylene Glycol (%)

Ethanol (%)

MINIMUM TEMPERATURE FOR FREEZE

PROTECTION (C)

–12.2

–9.4

–6.7

–3.9

25 21 16 10

38 30 22 15

29 25 20 14

FREEZE PROTECTION SELECTION — The –1.1 C FP1 factory setting (water) should be used to avoid freeze damage to the unit.

Once antifreeze is selected, the JW3 jumper (FP1) should be clipped on the control to select the low temperature

(antifreeze –12.2 C) set point to avoid nuisance faults.

Cooling Tower/Boiler Systems —

These systems typically use a common loop maintained at 15.6 C to 32.2 C.

Carrier recommends using a closed circuit evaporative cooling tower with a secondary heat exchanger between the tower and the water loop. If an open type cooling tower is used continuously, chemical treatment and filtering will be necessary.

Ground Coupled, Closed Loop and Plateframe

Heat Exchanger Well Systems —

These systems allow water temperatures from –1.1 to 43.3 C. The external loop field is divided up into 50 mm polyethylene supply and return lines. Each line has valves connected in such a way that upon system start-up, each line can be isolated for flushing using only the system pumps. Air separation should be located in the piping system prior to the fluid re-entering the loop field.

OPERATION

Power Up Mode —

The unit will not operate until all the inputs, terminals and safety controls are checked for normal operation.

NOTE: The compressor will have a 5-minute anti-short cycle delay upon power up.

Units with Aquazone™ Complete C Control

STANDBY — The Y and W terminals are not active in Standby mode, however the O and G terminals may be active, depending on the application. The compressor will be off.

COOLING — The Y and O terminals are active in Cooling mode. After power up, the first call to the compressor will initiate a 5 to 80-second random start delay and a 5-minute antishort cycle protection time delay. After both delays are complete, the compressor is energized.

NOTE: On all subsequent compressor calls the random start delay is omitted.

32

HEATING STAGE 1 — Terminal Y is active in Heating

Stage 1. After power up, the first call to the compressor will initiate a 5 to 80-second random start delay and a 5-minute anti-short cycle protection time delay. After both delays are complete, the compressor is energized.

NOTE: On all subsequent compressor calls the random start delay is omitted.

HEATING STAGE 2 — To enter Stage 2 mode, terminal W is active (Y is already active). Also, the G terminal must be active or the W terminal is disregarded. The compressor relay will remain on and EH1 (emergency heat) is immediately turned on.

EH2 will turn on after 10 minutes of continual Stage 2 demand.

NOTE: EH2 will not turn on (or if on, will turn off) if FP1

(freeze protection) temperature is greater than 7.2 C and FP2 is greater than 43.3 C.

EMERGENCY HEAT — In Emergency Heat (EH) mode, terminal W is active while terminal Y is not. Terminal G must be active or the W terminal is disregarded. EH1 is immediately turned on. EH2 will turn on after 5 minutes of continuous emergency heat demand.

Units with Aquazone Deluxe D Control

STANDBY/FAN ONLY — The compressor will be off. The fan enable, fan speed, and reversing valve (RV) relays will be on if inputs are present. If there is a Fan 1 demand, the fan enable will immediately turn on. If there is a Fan 2 demand, the fan enable and fan speed will immediately turn on.

NOTE: DIP switch 5 on S1 does not have an effect upon Fan 1 and Fan 2 outputs.

HEATING STAGE 1 — In Heating Stage 1 mode, the fan enable and compressor relays are turned on immediately. Once the demand is removed, the relays are turned off and the control reverts to Standby mode. If there is a master/slave or dual compressor application, all compressor relays and related functions will operate per their associated DIP switch 2 setting on S1.

HEATING STAGE 2 — In Heating Stage 2 mode, the fan enable and compressor relays remain on. The fan speed relay is turned on immediately and turned off immediately once the demand is removed. The control reverts to Heating Stage 1 mode.

If there is a master/slave or dual compressor application, all compressor relays and related functions will operate per their associated DIP switch 2 setting on S1.

HEATING STAGE 3 — In Heating Stage 3 mode, the fan enable, fan speed and compressor relays remain on. The EH1 output is turned on immediately. With continuing Heat Stage 3 demand, EH2 will turn on after 10 minutes. EH1 and EH2 are turned off immediately when the Heating Stage 3 demand is removed. The control reverts to Heating Stage 2 mode.

Output EH2 will be off if FP1’s temperature is greater than

7.2 C AND FP2 (when shorted) is greater than 43.3 C during

Heating Stage 3 mode. This condition will have a 30-second recognition time. Also, during Heating Stage 3 mode, EH1,

EH2, fan enable, and fan speed will be ON if G input is not active.

EMERGENCY HEAT — In Emergency Heat mode, the fan enable and fan speed relays are turned on. The EH1 output is turned on immediately. With continuing emergency heat demand, EH2 will turn on after 5 minutes. Fan enable and fan speed relays are turned off after a 60-second delay. The control reverts to Standby mode.

Output EH1, EH2, fan enable, and fan speed will be ON if the G input is not active during Emergency Heat mode.

COOLING STAGE 1 — In Cooling Stage 1 mode, the fan enable, compressor and RV relays are turned on immediately.

If configured as stage 2 (DIP switch set to OFF) then the compressor and fan will not turn on until there is a stage 2 demand.

The fan enable and compressor relays are turned off

immediately when the Cooling Stage 1 demand is removed.

The control reverts to Standby mode. The RV relay remains on until there is a heating demand. If there is a master/slave or dual compressor application, all compressor relays and related functions will track with their associated DIP switch 2 on S1.

COOLING STAGE 2 — In Cooling Stage 2 mode, the fan enable, compressor and RV relays remain on. The fan speed relay is turned on immediately and turned off once the Cooling

Stage 2 demand is removed. The control reverts to Cooling

Stage 1 mode. If there is a master/slave or dual compressor application, all compressor relays and related functions will track with their associated DIP switch 2 on S1.

NIGHT LOW LIMIT (NLL) STAGED HEATING — In NLL staged Heating mode, the override (OVR) input becomes active and is recognized as a call for heating and the control will immediately go into a Heating Stage 1 mode. With an additional 30 minutes of NLL demand, the control will go into

Heating Stage 2 mode. With another additional 30 minutes of

NLL demand, the control will go into Heating Stage 3 mode.

COMPLETE C AND DELUXE D BOARD

SYSTEM TEST

System testing provides the ability to check the control operation. The control enters a 20-minute Test mode by momentarily shorting the test pins. All time delays are reduced by a factor of 15.

Test Mode —

To enter Test mode on Complete C or

Deluxe D controls, cycle the fan 3 times within 60 seconds.

The LED (light-emitting diode) will flash a code representing the last fault when entering the Test mode. The alarm relay will also power on and off during Test mode. See Tables 12-14. To exit Test mode, short the terminals for 3 seconds or cycle the power 3 times within 60 seconds.

NOTE: The Deluxe D control has a flashing code and alarm relay cycling code that will both have the same numerical label. For example, flashing code 1 will have an alarm relay cycling code 1. Code 1 indicates the control has not faulted since the last power-off to power-on sequence.

Retry Mode —

In Retry mode, the status LED will start to flash slowly to signal that the control is trying to recover from an input fault. The control will stage off the outputs and try to again satisfy the thermostat used to terminal Y. Once the thermostat input calls are satisfied, the control will continue normal operation.

NOTE: If 3 consecutive faults occur without satisfying the thermostat input call to terminal Y, the control will go into lockout mode. The last fault causing the lockout is stored in memory and can be viewed by entering Test mode.

Aquazone™ Deluxe D Control LED Indicators —

There are 3 LED indicators on the Deluxe D control:

STATUS LED — Status LED indicates the current status or mode of the Deluxe D control. The Status LED light is green.

TEST LED — Test LED will be activated any time the Deluxe D control is in Test mode. The Test LED light is yellow.

FAULT LED — Fault LED light is red. The fault LED will always flash a code representing the last fault in memory. If there is no fault in memory, the fault LED will flash code 1 and appear as 1 fast flash alternating with a 10-second pause. See

Table 14.

Table 12 — Complete C Control Current LED Status and Alarm Relay Operations

On

Off

LED STATUS

Slow Flash

Fast Flash

Flashing Code 1

Flashing Code 2

Flashing Code 3

Flashing Code 4

Flashing Code 5

Flashing Code 6

Flashing Code 7

Flashing Code 8

Flashing Code 9

LEGEND

CO — Condensate Overflow

FP — Freeze Protection

HP — High Pressure

DESCRIPTION OF OPERATION

Normal Mode

Normal Mode with PM Warning

Complete C Control is non-functional

Fault Retry

Over/Under Voltage Shutdown

Lockout

Test Mode — No fault in memory

Test Mode — HP Fault in memory

Test Mode — LP Fault in memory

Test Mode — FP1 Fault in memory

Test Mode — FP2 Fault in memory

Test Mode — CO Fault in memory

Test Mode — Over/Under shutdown in memory

Test Mode — PM in memory

Test Mode — FP1/FP2 swapped fault in memory

LED —

LP

PM

—

—

Light-Emitting Diode

Low Pressure

Performance Monitor

Open

Cycle (Closed 5 sec, Open 25 sec)

Open

Open

Open (Closed after 15 minutes)

Closed

Cycling Code 1

Cycling Code 2

Cycling Code 3

Cycling Code 4

Cycling Code 5

Cycling Code 6

Cycling Code 7

Cycling Code 8

Cycling Code 9

ALARM RELAY

NOTES:

1. Slow flash is 1 flash every 2 seconds.

2. Fast flash is 2 flashes every 1 second.

3. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by a 10-second pause. This sequence will repeat continually until the fault is cleared.

Table 13 — Complete C Control LED Code and Fault Descriptions

1

2

3

4

LED CODE

8

9

5

6

7 (Autoreset)

FAULT

No fault in memory

High-Pressure Switch

Low-Pressure Switch

Freeze Protection Coax — FP1

Freeze Protection Air Coil — FP2

Condensate overflow

Over/Under Voltage Shutdown

PM Warning

FP1 and FP2 Thermistors are swapped

LEGEND



LED — Light-Emitting Diode

LP — Low Pressure

PM — Performance Monitor

DESCRIPTION

There has been no fault since the last power-off to power-on sequence

HP open instantly

LP open for 30 continuous seconds before or during a call (bypassed for first 60 seconds)

FP1 below temp limit for 30 continuous seconds (bypassed for first 60 seconds of operation)

FP2 below temp limit for 30 continuous seconds (bypassed for first 60 seconds of operation)

Sensor overflow (grounded) for 30 continuous seconds

"R" power supply is <19-vac or >30-vac

Performance monitor Warning has occurred.

FP1 temperature is higher than FP2 in heating/test mode, or FP2 temperature is higher than FP1 in cooling/test mode.

33

Table 14 — Aquazone™ Deluxe D Control Current LED Status and Alarm Relay Operations

DESCRIPTION

Normal Mode

Normal Mode with PM

D Control is non-functional

Test Mode

Night Setback

ESD

Invalid T-stat Inputs

No Fault in Memory

HP Fault

LP Fault

FP1 Fault

FP2 Fault

CO Fault

Over/Under Voltage

HP Lockout

LP Lockout

FP1 Lockout

FP2 Lockout

CO Lockout

STATUS LED

(Green)

On

On

Off

—

Flashing Code 2

Flashing Code 3

Flashing Code 4

On

Slow Flash

Slow Flash

Slow Flash

Slow Flash

Slow Flash

Slow Flash

Fast Flash

Fast Flash

Fast Flash

Fast Flash

Fast Flash

Off

Off

Off

Off

Off

Off

Off

Off

Off

Off

On

—

—

—

Off

Off

Off

Off

Off

TEST LED

(Yellow)

LEGEND

CO — Condensate Overflow

ESD — Emergency Shutdown




LP — Low Pressure

PM — Performance Monitor

FAULT LED (Red)

Flash Last Fault Code in Memory

Flashing Code 8

Off





Flashing Code 1

Flashing Code 2

Flashing Code 3

Flashing Code 4

Flashing Code 5

Flashing Code 6

Flashing Code 7

Flashing Code 2

Flashing Code 3

Flashing Code 4

Flashing Code 5

Flashing Code 6

ALARM RELAY

Open

Cycle (closed 5 sec, open 25 sec, …)

Open

Cycling Appropriate Code

—

—

—

Open

Open

Open

Open

Open

Open

Open (closed after 15 minutes)

Closed

Closed

Closed

Closed

Closed

NOTES:

1. If there is no fault in memory, the Fault LED will flash code 1.

2. Codes will be displayed with a 10-second Fault LED pause.

3. Slow flash is 1 flash every 2 seconds.

4. Fast flash is 2 flashes every 1 second.

5. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by a 10-second pause. This sequence will repeat continually until the fault is cleared.

SERVICE

Perform the procedures outlined below periodically, as indicated.

WARNING

To prevent injury or death due to electrical shock or contact with moving parts, open unit disconnect switch before servicing unit.

IMPORTANT: When a compressor is removed from this unit, system refrigerant circuit oil will remain in the compressor. To avoid leakage of compressor oil, the refrigerant lines of the compressor must be sealed after it is removed.

IMPORTANT: All refrigerant discharged from this unit must be recovered without exception. Technicians must follow industry accepted guidelines and all local, state and federal statutes for the recovery and disposal of refrigerants.

IMPORTANT: To avoid the release of refrigerant into the atmosphere, the refrigerant circuit of this unit must only be serviced by technicians who meet local, state and federal proficiency requirements.

Unit Inspection —

Visually inspect the unit at least once a month. Pay special attention to hose assemblies. Repair any leaks and replace deteriorated hoses immediately. Note any signs of deterioration or cracking.

System Flushing —

Properly clean and flush system periodically. Refer to Pre-Start-Up, System Cleaning and

Flushing section.

Water Coil —

Keep air out of the water coil. Check open loop systems to be sure the well head is not allowing air to infiltrate the water line. Always keep lines airtight.

Inspect heat exchangers regularly and clean more frequently if the unit is located in a “dirty” environment. The heat exchanger should be kept full of water at all times. Open loop systems should have an inverted P trap placed in the discharge line to keep water in the heat exchanger during off cycles.

Closed loop systems must have a minimum of 100 kPa during the summer and 275 kPa during the winter.

Check P trap frequently for proper operation.

FILTERS — Inspect filters. Establish a regular maintenance schedule. Clean or replace filters frequently depending on need.

To remove the filter from the 50PEC unit, slide the filter out of its frame located in the return air opening at the bottom front of the unit. When re-installing the filter, use the slide-in rails of the filter frame to guide the filter into the proper position.

CAUTION

To avoid fouled machinery and extensive unit clean-up,

DO NOT operate units without filters in place. DO NOT use equipment as a temporary heat source during construction.

Refrigerant System —

Verify air and water flow rates are at proper levels before servicing. To maintain sealed circuitry integrity, do not install service gages unless unit operation appears abnormal.

Condenser Cleaning —

Water-cooled condensers may require cleaning of scale (water deposits) due to improperly maintained closed-loop water systems. Open water tower systems may require removal of sludge build-up due to induced contaminants.

Local water conditions may cause excessive fouling or pitting of tubes. Therefore, condenser tubes should be cleaned at least once a year, or more often if the water is contaminated.

Use standard coil cleaning procedures which are compatible with both the heat exchanger material and copper water lines.

Generally, the more water flowing through the unit, the less chance for scaling, however flow rates over 3 gpm per ton can

34

produce water (or debris) velocities that can erode the heat exchanger wall and ultimately produce leaks.

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.

CAUTION

Follow all safety codes. Wear safety glasses and rubber gloves when using inhibited hydrochloric acid solution.

Observe and follow acid manufacturer’s instructions.

Clean condensers with an inhibited hydrochloric acid solution. The acid can stain hands and clothing, damage concrete, and, without inhibitor, damage steel. Cover surroundings to guard against splashing. Vapors from vent pipe are not harmful, but take care to prevent liquid from being carried over by the gases.

Warm solution acts faster, but cold solution is just as effective if applied for a longer period.

GRAVITY FLOW METHOD — Do not add solution faster than vent can exhaust the generated gases.

When condenser is full, allow solution to remain overnight, then drain condenser and flush with clean water. Follow acid manufacturer’s instructions. See Fig. 30.

FILL CONDENSER WITH

CLEANING SOLUTION. DO

NOT ADD SOLUTION

MORE RAPIDLY THAN

VENT CAN EXHAUST

GASES CAUSED BY

CHEMICAL ACTION.

FUNNEL

PAIL

VENT

PIPE

1-IN.

(25 mm)

PIPE

1.5 m APPROX

1.0 TO 1.2 m

CONDENSER

PAIL

Fig. 30 — Gravity Flow Method a50-8586

FORCED CIRCULATION METHOD — Fully open vent pipe when filling condenser. The vent may be closed when condenser is full and pump is operating. See Fig. 31.

Regulate flow to condenser with a supply line valve. If pump is a nonoverloading type, the valve may be fully closed while pump is running.

For average scale deposit, allow solution to remain in condenser overnight. For heavy scale deposit, allow 24 hours.

Drain condenser and flush with clean water. Follow acid manufacturer’s instructions.

PUMP

SUCTION

PUMP

SUPPORT

PRIMING

CONN.

GAS VENT

GLOBE

VALVES

SUPPLY

1-IN.

(25 mm)

PIPE CONDENSER

TANK

REMOVE WATER

REGULATING VALVE

FINE MESH

SCREEN

RETURN a50-8687

Fig. 31 — Forced Circulation Method

Condensate Pans —

Check condensate drain pans for algae growth every three months. If algae growth is apparent, consult a water treatment specialist for proper chemical treatment. The application of an algaecide every three months will typically eliminate algae problems in most locations. Check condensate hose for leaks and blockage and correct any problems.

Blower Motors —

All units have lubricated fan motors.

BLOWER MOTORS SHOULD NEVER BE LUBRICATED

UNLESS OBVIOUS, DRY OPERATION IS SUSPECTED.

Periodic maintenance oiling is not recommended because it will result in dirt accumulating on excess oil and cause eventual motor failure. Conduct annual dry operation check and amperage check to ensure amp draw is no more than 10% greater than that indicated by serial plate data.

Compressor —

Conduct an amperage check annually on the compressor and fan motor. Amperage draw should not exceed normal full load amps. Maintain a log of amperage to detect deterioration prior to component failure.

Safety Control Reset —

The 50PEC heat pumps are furnished with high-pressure, low-pressure and lowtemperature cutouts to prevent the machine from operating at abnormal conditions of temperature or water flow.

The contacts of the high-pressure control used on 50PEC units are designed to open at 2592 kPa and automatically re-close at 2096 kPa. The Complete C or Deluxe D control monitors this and other functions such as refrigerant temperatures and pressures and condensate overflow and will interrupt unit heating or cooling operation.

The machine must be reset manually. Reset is accomplished by pressing the STOP button and then pushing either HI HEAT,

LOW HEAT, HI COOL or LO COOL to restart the unit in the desired mode of operation. (The 50PEC unit can also be reset by opening and closing the supply power disconnect switch.)

IMPORTANT: If the unit must be reset more than twice, check the unit for a dirty filter, abnormal entering water temperature, inadequate or excessive water flow, and internal malfunctions. If the unit continues to cut out, contact a trained service technician.

35

WARNING

When replacing the compressor contactor or lockout relay in a unit with electromechanical controls, use only Carrier factory authorized parts. Substitution of other components may result in an inoperative safety circuit and may cause a hazardous condition.

Checking System Charge —

Units are shipped with full operating charge. If recharging is necessary:

1. Insert thermometer bulb in insulating rubber sleeve on liquid line near filter drier. Use a digital thermometer for all temperature measurements. DO NOT use a mercury or dial-type thermometer.

2. Connect pressure gage to discharge line near compressor.

3. After unit conditions have stabilized, read head pressure on discharge line gage.

NOTE: Operate unit a minimum of 15 minutes before checking charge. From standard field-supplied Pressure-

Temperature chart for R-410A, find equivalent saturated condensing temperature.

4. Read liquid line temperature on thermometer, then subtract from bubble point temperature. The difference equals subcooling temperature.

Refrigerant Charging

WARNING

To prevent personal injury, wear safety glasses and gloves when handling refrigerant. Do not overcharge system — this can cause compressor flooding.

NOTE: Do not vent or depressurize unit refrigerant to atmosphere. Remove and recover refrigerant following accepted practices.

Air Coil Fan Motor Removal

CAUTION

Before attempting to remove fan motors or motor mounts, place a piece of plywood over evaporator coils to prevent coil damage.

Motor power wires need to be disconnected from motor terminals before motor is removed from unit.

1. Shut off unit main power supply.

2. Loosen bolts on mounting bracket so that fan belt can be removed.

3. Loosen and remove the 2 motor mounting bracket bolts on left side of bracket.

4. Slide motor/bracket assembly to extreme right and lift out through space between fan scroll and side frame. Rest motor on a high platform such as a step ladder. Do not allow motor to hang by its power wires.

TROUBLESHOOTING

When troubleshooting problems with a WSHP, consider the following and refer to Table 15.

Thermistor —

A thermistor may be required for singlephase units where starting the unit is a problem due to low voltage. See Fig. 32 for thermistor nominal resistance.

Control Sensors —

The control system employs 2 nominal 10,000 ohm thermistors (FP1 and FP2) that are used for freeze protection. Be sure FP1 is located in the discharge fluid and FP2 is located in the air discharge. See Fig. 33.

90.0

80.0

70.0

60.0

50.0

40.0

30.0

20.0

10.0

0.0

-17.7

-6.6

4.4

15.6

26.7

Temperature (C)

37.8

48.9

Fig. 32 — Thermistor Nominal Resistance

60.0

AIRFLOW

(

°C)

AI R

COI L

THERMIST OR

AIRFLO W

( °C)

FP 2

EXP ANSION

VA LV E

FP 1

COAX

SUCTIO N

COMPRESSOR

DISCHARGE

CONDENSA TE

OVERFLO W

(CO)

AIR COI L

FREEZ E

PROTECTIO N

LIQUI D

LIN E

WA TER IN

WA TE R

COI L

PROTECTIO N

WA TER OUT

LEGEND

COAX — Coaxial Heat Exchanger

Airflow

Refrigerant Liquid Line Flow

Fig. 33 — FP1 and FP2 Thermistor Location

36 a50-8163

Table 15 — Troubleshooting

FAULT

Main Power Problems

HP Fault — Code 2

High Pressure

LP Fault — Code 3

Low Pressure/Loss of

Charge

FP1 Fault — Code 4

Water Freeze Protection

FP2 Fault — Code 5

Air Coil Freeze

Protection

Condensate Fault —

Code 6

Over/Under Voltage —

Code 7

(Auto Resetting)

Performance Monitor —

Code 8

No Fault Code Shown

Unit Short Cycles

Only Fan Runs

LEGEND




LP — Low Pressure

RV — Reversing Valve

HEATING COOLING

X X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

POSSIBLE CAUSE

Green Status LED Off

Reduced or no water flow in cooling

SOLUTION

Check line voltage circuit breaker and disconnect.

Check for line voltage between L1 and L2 on the contactor.

Check for 24-vac between R and C on controller.

Check primary/secondary voltage on transformer.

Check pump operation or valve operation/setting.

Check water flow adjust to proper flow rate.

Bring water temperature within design parameters.

Water temperature out of range in cooling

Reduced or no airflow in heating

Check for dirty air filter and clean or replace.

Check fan motor operation and airflow restrictions.

Dirty air coil — construction dust, etc. Perform preventative maintenance; Clean air coil.

Air temperature out of range in heating

High external static. Check duct design and downstream interference.

Bring return-air temperature within design parameters.

Overcharged with refrigerant Check superheat/subcooling vs. typical operating condition.

Bad HP switch Check switch continuity and operation. Replace.

Insufficient charge

Compressor pump down at start-up

Check for refrigerant leaks.

Check charge and start-up water flow.

Reduced or no water flow in heating

Improper freeze protect setting ( –1.1 C

vs –12.2 C )

Water temperature out of range

Check pump operation or water valve operation/setting.

Plugged strainer or filter. Clean or replace.


Inadequate antifreeze level Check antifreeze density with hydrometer.

Clip JW3 jumper for antifreeze ( –12.2 C ) use.


Bad thermistor

Reduced or no airflow in cooling

Check temperature and impedance correlation.




Air temperature out of range Too much cold vent air. Bring entering-air temperature within design parameters.

Improper freeze protect setting ( –1.1 C

vs –12.2 C

)

Normal airside applications will require –1.1 C only.

Bad thermistor

Blocked drain

Improper trap

Poor drainage

Check temperature and impedance correlation.

Check for blockage and clean drain.

Check trap dimensions and location ahead of vent.

Check for piping slope away from unit.

Moisture on sensor

Under voltage

Check slope of unit toward outlet.

Poor venting. Check vent location.

Check for moisture shorting to air coil.

Check power supply and 24-vac voltage before and during operation.

Check power supply wire size.

Check compressor starting.

Check 24-vac and unit transformer tap for correct power supply voltage.

Check power supply voltage and 24 vac before and during operation.

Over voltage

Check 24-vac and unit transformer tap for correct power supply voltage.

Heating mode FP2> 51.7 C Check for poor airflow or overcharged unit.

Cooling mode FP1>

OR FP2< 4.4 C

51.7 C Check for poor water flow or airflow.

Compressor overload Check and replace if necessary.

Control board

Dirty air filter

Unit in Test mode

Unit selection

Compressor overload

Thermostat position

Unit locked out

Compressor overload

Thermostat wiring

Reset power and check operation.

Check and clean air filter.

Reset power or wait 20 minutes for auto exit.

Unit may be oversized for space. Check sizing for actual load of space.

Check and replace if necessary.

Ensure thermostat set for heating or cooling operation.

Check for lockout codes. Reset power.

Check compressor overload. Replace if necessary.

Check Y and W wiring at heat pump. Jumper Y and R for compressor operation in Test mode.

37

Table 15 — Troubleshooting (cont)

Cooling

Properly

FAULT

Only Compressor Runs

Unit Does Not Operate in

Insufficient Capacity/

Not Cooling or Heating

High Head Pressure

Low Suction Pressure

Low Discharge Air

Temperature in Heating

High Humidity

LEGEND




LP — Low Pressure

RV — Reversing Valve

HEATING COOLING

X X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

POSSIBLE CAUSE

Thermostat wiring

Fan motor relay

Fan motor

Reversing valve

SOLUTION

Check G wiring at heat pump. Jumper G and R for fan operation.

Check Y and W wiring at heat pump. Jumper Y and R for compressor operation in Test mode.

Jumper G and R for fan operation. Check for line voltage across BR contacts.

Check fan power enable relay operation (if present).

Check for line voltage at motor. Check capacitor.

Set for cooling demand and check 24-vac on RV coil and at control.

If RV is stuck, run high pressure up by reducing water flow and while operating engage and disengage RV coil voltage to push valve.

Thermostat setup

Thermostat wiring

Dirty filter


Reduced or no airflow in cooling

Leaky ductwork

Check for ‘O’ RV setup not ‘B’.

Check O wiring at heat pump. Jumper O and R for RV coil.

Replace or clean.







Check supply and return-air temperatures at the unit and at distant duct registers if significantly different, duct leaks are present.

Low refrigerant charge Check superheat and subcooling.

Restricted metering device Check superheat and subcooling. Replace.

Defective reversing valve

Thermostat improperly located

Unit undersized

Perform RV touch test.

Check location and for air drafts behind thermostat.

Recheck loads and sizing check sensible cooling load and heat pump capacity.

Perform scaling check and clean if necessary.

Scaling in water heat exchanger

Inlet water too hot or cold


Check load, loop sizing, loop backfill, ground moisture.




Reduced or no water flow in cooling

Check pump operation or valve operation/setting.


Inlet water too hot

Air temperature out of range in heating

Check load, loop sizing, loop backfill, ground moisture.

Bring return-air temperature within design parameters.

Scaling in water heat exchanger

Unit overcharged

Perform scaling check and clean if necessary.

Non-condensables in system

Check superheat and subcooling. Reweigh in charge.

Vacuum system and reweigh in charge.

Restricted metering device Check superheat and subcooling. Replace.

Reduced water flow in heating

Check pump operation or water valve operation/setting.

Plugged strainer or filter. Clean or replace.

Water temperature out of range



Reduced airflow in cooling Check for dirty air filter and clean or replace.



Air temperature out of range Too much cold vent air. Bring entering air temperature within design parameters.

Insufficient charge

Too high airflow

Poor performance

Too high airflow

Unit oversized

Check for refrigerant leaks.

Check blower.

See ‘Insufficient Capacity’ above.

Check blower.

Recheck loads and sizing check sensible cooling load and heat pump capacity.

Copyright 2010 Carrier Corporation



Form 50PEC-C1SI Pg 38 9-10 Replaces: New

CUSTOMER:___________________________

MODEL NO.:___________________________

50PEC UNIT

START-UP CHECKLIST

JOB NAME: _______________________________________

SERIAL NO.:____________________ DATE:_________

I. PRE-START-UP

DOES THE UNIT VOLTAGE CORRESPOND WITH THE SUPPLY VOLTAGE AVAILABLE? (Y/N)

HAVE THE POWER AND CONTROL WIRING CONNECTIONS BEEN MADE AND TERMINALS

TIGHT? (Y/N)

HAVE WATER CONNECTIONS BEEN MADE AND IS FLUID AVAILABLE AT HEAT EXCHANGER?

(Y/N)

HAS PUMP BEEN TURNED ON AND ARE ISOLATION VALVES OPEN? (Y/N)

HAS CONDENSATE CONNECTION BEEN MADE AND IS A TRAP INSTALLED? (Y/N)

IS AN AIR FILTER INSTALLED? (Y/N)

II. START-UP

IS FAN OPERATING WHEN COMPRESSOR OPERATES? (Y/N)

UNIT VOLTAGE — COOLING OPERATION

PHASE AB VOLTS

PHASE AB AMPS

CONTROL VOLTAGE

IS CONTROL VOLTAGE ABOVE 21.6 VOLTS? (Y/N) .

IF NOT, CHECK FOR PROPER TRANSFORMER CONNECTION.

TEMPERATURES

FILL IN THE ANALYSIS CHART ATTACHED.

COAXIAL HEAT

EXCHANGER

COOLING CYCLE:

WATER IN

AIR COIL

HEATING CYCLE:

WATER IN

COOLING CYCLE:

AIR IN

HEATING CYCLE:

AIR IN

C WATER OUT

C WATER OUT

C AIR OUT

C AIR OUT

C

C

C

C kPa kPa

L/m

L/m

CL-1

HEATING CYCLE ANALYSIS

°C

AIR

COIL

°C

EXPANSION

VALVE

COAX kPa

°C

DEW

POINT

SUCTION

COMPRESSOR

DISCHARGE

°C

LIQUID LINE °C kPa

WATER IN

°C kPa

WATER OUT

LOOK UP PRESSURE DROP IN TABLE 9

TO DETERMINE FLOW RATE

COOLING CYCLE ANALYSIS

°C

AIR

COIL

°C

EXPANSION

VALVE

COAX kPa

°C

DEW

POINT

SUCTION

COMPRESSOR

DISCHARGE

°C

LIQUID LINE °C kPa

WATER IN

°C kPa

WATER OUT

LOOK UP PRESSURE DROP IN TABLE 8

TO DETERMINE FLOW RATE

HEAT OF EXTRACTION (ABSORPTION) OR HEAT OF REJECTION =

FLOW RATE (L/m) x TEMP. DIFF. (DEG. C) x FLUID FACTOR* =

(kW)

SUPERHEAT = SUCTION TEMPERATURE – SATURATED SUCTION TEMPERATURE

= (DEG C)

SUBCOOLING = SATURATED CONDENSING TEMPERATURE – LIQUID LINE TEMPERATURE

= (DEG C)

*Use 500 for water, 485 for antifreeze.

Copyright 2010 Carrier Corporation



Form 50PEC-C1SI Pg CL-2 9-10 Replaces: New

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