Carrier 50CR Maintenance, Personal Injury and Unit Damage Hazard, Unit Operation Hazard

Page 24

Table 6—Electric Heat Pressure Drop Table

Large Cabinet: 042-060

 

 

 

 

 

 

 

 

CFM

 

 

 

 

 

 

 

 

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

2100

2200

2300

2400

2500

5kw

0.00

0.00

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

7.2 kw

0.00

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

10 kw

0.00

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

15 kw

0.00

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

0.14

0.15

20 kw

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

0.14

0.15

0.16

50CR

 

T2 C

 

 

 

 

 

 

C

 

 

 

 

 

 

O

 

 

 

 

 

O

 

DFT

 

 

 

 

R

T1

 

 

 

 

 

W

 

 

 

 

 

 

2

 

 

 

 

 

 

Y

 

 

 

 

 

 

C

Y

 

 

 

 

 

SPEEDUP

P1

 

 

 

 

 

J1

P3

90 INTERVALTIMER

60 30

30 60

120

 

DFT

 

OFF

QUIET SHIFT

ON

 

Speedup

 

 

 

Quiet

 

Pins

 

 

 

Shift

OF2

OF1

CESO130076–00

Defrost interval

DIP switches

Fig. 23 - Defrost Control

MAINTENANCE

To ensure continuing high performance, and to minimize the possibility of premature equipment failure, periodic maintenance must be performed on this equipment. This heat pump unit should be inspected at least once each year by a qualified service person. To troubleshoot unit, refer to Table 8, Troubleshooting Chart.

NOTE TO EQUIPMENT OWNER: Consult your local dealer about the availability of a maintenance contract.

!WARNING

PERSONAL INJURY AND UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal injury or death and possible unit component damage.

The ability to properly perform maintenance on this equipment requires certain expertise, mechanical skills, tools and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment, other than those procedures recommended in the Owner’s Manual.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow these warnings could result in serious injury or death:

1.Turn off electrical power to the unit before performing any maintenance or service on this unit.

2.Use extreme caution when removing panels and parts.

3.Never place anything combustible either on or in contact with the unit.

!CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Errors made when reconnecting wires may cause improper and dangerous operation. Label all wires prior to disconnecting when servicing.

24

Image 24
Contents Installation Instructions Table of ContentsSafety Considerations Electrical Shock HazardEquipment Damage Hazard IntroductionRoof Curb for Small Cabinet Roof Curb for Large Cabinet Unit Leveling Tolerances 50CR024-036 Unit Dimensions 50CR042-060 Unit Dimensions Rig and Place Unit InspectionUnit Falling Hazard Property Damage HazardRigging Bracket Under Unit Rain Lip Select and Install Ductwork Electrical Operation HazardProvide for Condensate Disposal Typical Installation Physical Data Unit 50CRRouting Power Leads Into Unit Connecting Ground Lead to Ground ScrewRouting Control Power Wires HIGH-VOLTAGE ConnectionsElectrical Data-50CR Electrical Data Legend Wiring Schematics-50CR Single Phase Wiring Schematics-50CR Three Phase Accessory Installation Line Power ConnectionsPRE-START-UP FIRE, EXPLOSION, Electrical Shock Hazard START-UPUnit Start-Up Status Code 45, Control Board Test Fault Status Code 37, Heater Output Sensed on When not EnergizedStatus Code 44, Motor Communication Fault Verify Motor Winding SectionStatus Code 36, Heater Output not Sensed When Energized Status Code 41, Blower Motor FaultStatus Code 16, System Communication Fault Status Code 25, Invalid Motor / Model SelectionStart-Up Adjustments Sequence of OperationCheck for Refrigerant Leaks Typical Heat Pump Operation, Cooling Mode Defrost Control Electric Heat Pressure Drop Table Small Cabinet Maintenance Personal Injury and Unit Damage HazardUnit Operation Hazard Air Filter Indoor Blower and MotorOutdoor Coil, Indoor Coil, and Condensate Drain Pan Outdoor FanPressure Switches Indoor AirflowMetering Devices-TXV & Accurater Piston High-Pressure Switch EXPLOSION, FIRE, Electrical Shock HazardPersonal INJURY, Unit Operation Hazard LOSS-OF-CHARGE Switch TroubleshootingSTART-UP Checklist System InformationObserve all warnings, cautions, and bold text Troubleshooting Chart Troubleshooting Chart Cont’d Head pressure too lowSTART-UP Checklist