Carrier 17, 19EX installation instructions Relief Valve Locations and Data, Valves

Page 21

Insulate Motor Terminals and Lead Wire Ends Ð Insulate compressor motor terminals, lead wire ends, and electrical wires to prevent moisture condensation and electrical arc- ing. For low-voltage units (up to 600 v), insulate the elec- trical terminals as follows:

1.Insulate each terminal by wrapping with one layer of insulation putty.

2.Overwrap putty with 4 layers of vinyl tape.

High-voltage units require special terminal preparation. The vinyl tape is not acceptable; a high voltage tape must be used. Installer is responsible for any damage caused by improper wiring between starter and compressor motor.

Connect Power Wires to Oil Pump Contactor Ð Connect power wires to oil pump contactor mounted in machine power panel. (See Fig. 19.) Use the electrical disconnect located in the machine starter (if supplied), or a separate fused disconnect as shown on job wiring diagrams. Check that power supply voltage agrees with oil pump voltage. Follow correct phas- ing for proper motor rotation.

Do not wire into the top surface of the power panel. Knock- outs are provided on the underside of the panel.

Connect Power Wires to Oil Heater Contactor Ð Connect control power wiring between the oil heater contactor ter- minals (Fig. 17 and 18) and terminals LL1 and LL2 on the ®eld wiring strip in the compressor motor starter. Refer to Fig. 21 and wiring label on the chiller power panel.

Voltage to terminals LL1 and LL2 comes from a con- trol transformer in a starter built to Carrier speci®ca- tions. Do not connect an outside source of control power to the compressor motor starter (terminals LL1 and LL2). An outside power source will produce dangerous volt- age at the line side of the starter, because supplying volt- age at the transformer secondary terminals produces in- put level voltage at the transformer primary terminals.

Connect Communication and Control Wiring from Starter to Power Panel Ð Connect control wiring from main motor starter to the chiller power panel. All control wiring must use shielded cable. Also connect the communications cable. Make sure the control circuit is grounded in accordance with applicable electrical codes and instructions on chiller control wiring label.

Table 13 Ð Relief Valve Locations and Data

RELIEF VALVE

HEAT EXCHANGER

REQUIRED C FACTOR

NOMINAL OUTLET

NUMBER OF

RATED RELIEF

 

SIZE

PRESSURE

LOCATION

 

 

 

PIPE SIZE (in.)

VALVES

Cooler

Condenser

lb air/min.

kg air/sec.

psig

kPa

 

 

 

 

31-33

31-33

139.7

1.06

11¤4 FPT

2

225

1551

 

41-43

41-43

158.8

1.20

11¤4 FPT

2

225

1551

Cooler

44

51-53

164.6

1.24

11¤4 FPT

2

225

1551

 

45-47

45-47

216.3

1.64

11¤4 FPT

3

225

1551

 

48

55-57

228.5

1.73

11¤4 NPT

3

225

1551

Economizer/Storage

41-44

ALL

64.2

0.49

11¤4 NPT

2*

225

1551

Vessel

45-48

ALL

84.3

0.64

11¤4 FPT

2*

225

1551

Pumpout Unit Condenser

ALL

ALL

1.5

0.01

3¤8 in. Male Flare MPT

1

385

2655

*To ensure relief valve serviceability, and as required in ASHRAE 15, latest edition, three-way valves and redundant relief valves are in- stalled on the storage vessel. Only one half of the ``No. of Valves'' listed are in service at any time.

NOTES:

1.The cooler relief C-factor is for both cooler and condenser vented through the cooler in accordance with ASHRAE (American Society of Heating, Refrigeration, and Air Conditioning Engi- neers) 15, latest edition.

2.Relief valve discharge pipe sizing is to be calculated per latest version of ASHRAE 15, using the tabulated C-factors and nom- inal pipe size listed above. Cooler and economizer/storage ves- sel rated relief valve pressure is 225 psig (1551 kPa).

3.The pumpout unit condenser contains less than 110 lb (50 kg) of HFC-134a, which is a Group A1 refrigerant. The ASHRAE 15 stand- ard exempts small-volume vessels from the requirement to vent outside. However, Carrier recommends that the pumpout con- denser be connected to the rest of the vent system.

21

Image 21
Contents Installation Instructions Contents Model Number Identication 19EX Typical 19EX InstallationTypical 17EX Installation 19EX Front View 17EX Front ViewTypical Top View 19EX Shown Ft-lb Item no TorqueComponent DIAMETER²² LENGTH²² Diameter Length Condenser LENGTH² Width Height Tube PullHeat Nozzle TypeRefrigerant Charge Condenser Total Weight Condenser ChargeDry Operating²² Refrigerant Water Dry Operating²² RefrigerantAdditional Condenser Weights Additional Cooler WeightsAuxiliary Connection Sizes CondenserTotal 19EX Motor Weights 50 Hz Total 19EX Motor Weights 60 HzCompressor Weights Total 17EX Drive Component WeightsÐ 17EX Motors Ð Total Weight, Kg SI Ð 17EX Motors Ð Total Weight, Lbs EnglishMarine Waterbox Cover Weights NIH Waterbox Cover WeightsPsi KPa Cooler Sizes 31-33 DimensionsCooler Sizes Ft-in 31-33Machine Vibration Isolation Connect Piping Frame 3 and 5 Marine Waterboxes NOZZLE-IN-HEAD WaterboxesCooler Waterbox Pass Out ArrPumpout Unit Frame 4 Marine WaterboxesWater Piping, Oil Cooler to Chilled Water Circuit Typical Valves Relief Valve Locations and DataPH-HZ Individual Component RatingsGeneral Page General 19EX Shown Oil Pump Wiring02525 877211¤8 Foam Tubing 15¤8 Insulation Requirements19EX Chillers Plan View Front ViewInstallation START-UP Request Checklist Testing YES/NO Date to be Completed