Trane Modular 20 to 35 Tons Instrukcja Instalacji Pobierz pdf (Strona 17)

CXRC-SVX01F-EN 17

Installation - Electrical

General Electrical Recommendations

All wiring and disconnects must comply with local and

National Electrical Codes (NEC).The installer must provide

properly sized system interconnection and power supply

wiring with appropriate fused disconnect switches.

Electrical connection types, sizes, and locations are shown

in Figure 5, p. 10.SeeTable 7, p. 18 for electrical data

(MCA, MFS).This information is also provided on the unit

nameplate. Sample wiring diagrams are provided in this

manual.

Power Supply Wiring

Run appropriately sized power wiring and field-supplied

conduit through the line voltage access opening provided

on the front of the unit. See Figure 1, p. 6 for electrical

connection locations. Run wire and field supplied conduit

up to the conduit connection point located in the bottom of

the control panel. Make appropriate connections to the

power terminal block in the control panel. Install fused

disconnects as required by local codes. Provide proper

equipment ground to the ground connections in the

control panel.

System Interconnection Wiring

Run appropriately sized field supplied conduits, 115 and 24

volt control wiring through the 115 and 24 volt access

openings provided on the front of the unit. See Figure 5,

p. 10 for electrical connection locations. Run wire and field

supplied conduit to the conduit connection points

provided on the bottom of the control panel. Make

appropriate connections to the terminal blocks in the

control panel. Install safety devices if required by local

code. Provide proper equipment ground to the ground

connections in the control panel. See Table 7, p. 18 for

electrical data.

Unit Wiring Diagrams

Specific unit wiring diagrams are provided on the inside of

the control panel door. Use these diagrams for

connections or trouble analysis. See “Wiring Diagrams,”

p. 27 for typical unit wiring diagrams.

Unit Voltage

Electrical power to the unit must meet stringent

requirements for the unit to operate properly.Total voltage

supply and voltage imbalance between phases must be

within the following tolerances as stated in the Voltage

Imbalance section of this chapter.

Voltage Supply

Measure each leg of supply voltage at the line voltage

disconnect switch. Readings must fall within voltage

utilization range shown on the unit nameplate. If voltage of

any leg does not fall within tolerance, notify the power

company to correct this situation before operating the

unit. Inadequate voltage to the unit can cause control

components to malfunction and shorten the life of relay

contacts and condenser fan motors.

Voltage Imbalance

Excessive voltage imbalance between phases in a three-

phase system can cause motors to overheat and

eventually fail. Maximum allowable imbalance is 2%.

Voltage imbalance is defined as 100 times the maximum

deviation of the three voltages (three phases) subtracted

from the average (without regard to sign) divided by the

average voltage.

WARNING

Hazardous Service Procedures!

The maintenance and troubleshooting procedures

recommended in this section of the manual could result

in exposure to electrical, mechanical or other potential

safety hazards. Always refer to the safety warnings

provided throughout this section concerning these

procedures. Unless specified otherwise, disconnect all

electrical power including remote disconnect and

discharge all energy storing devices such as capacitors

before servicing. Follow proper lockout/tagout

procedures to ensure the power can not be

inadvertently energized. When necessary to work with

live electrical components, have a qualified licensed

electrician or other individual who has been trained in

handling live electrical components perform these

tasks. Failure to follow all of the recommended safety

warnings provided, could result in death or serious

injury.

NOTICE:

Use Copper Conductors Only!

Unit terminals are not designed to accept other types of

conductors. Failure to use copper conductors could

result in equipment damage.

WARNING

Live Electrical Components!

During installation, testing, servicing and

troubleshooting of this product, it may be necessary to

work with live electrical components. Have a qualified

licensed electrician or other individual who has been

properly trained in handling live electrical components

perform these tasks. Failure to follow all electrical

safety precautions when exposed to live electrical

components could result in death or serious injury.

NOTICE:

Motor Damage!

Correct phase sequence is critical. Incorrect phase

sequence of the incoming line voltage could result in

motor damage.

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