Carrier 38HD User Manual download pdf (Page 7)

Table 3 — Electrical Data (60 Hz)

OUTDOOR

UNIT 38HD

V/PH

OPER VOLTS*

COMPR FAN

FLA

MCA

MAX FUSE

OR HACR TYPE

CKT BKR AMPS

Max

Min

LRA RLA

018

024

030

036

048

060

208/230-1 254

187

52 0

60.0

65 0

82 0

127 0

135 0

10.6

13.5

165

25 0

30.7

.70

1 45

1.45

120

140

180

22 0

33 0

40 0

036

67 5 10.0

1 45

140

048

208/230-3

254

187 98 5 15 4

1.45 21 0 35

060

105.0 19.6 1.45 26 0 45

036

33 8 50 80 70 15

048

460-3

506 414 49 3 77

11 0

060

55 0

104 .80 14.0 20

FLA — Full Load Amps

HACR — Heating, Air Conditioning, Refrigeration

LRA — Locked Rotor Amps

MCA — Minimum Circuit Amps per NEC Section 430-24

RLA — Rated Load Amps (compressor)

‘Permissible limits of the voitage range at which unit wiil operate

satisfactorily

NOTE; Control circuit is 24v on all units and requires external

power source

Example: Supply voltage is 460-3-60.

ABC AB = 452 volts

BC = 464 volts

AC = 455 volts

Average Voltage =

452 + 464 + 455

1371

457

Determine maximum deviation from average voltage

(AB) 457 - 452 = 5 volts

(BC) 464 - 457 = 7 volts

(AC) 457 - 455 = 2 volts

Maximum deviation is 7 volts.

Determine % voltage imbalance:

% Voltage Imbalance = 100 x

457

1.53%

This amount of phase imbalance is satisfactory as it is

below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase im

balance is more than 2% contact your local electric

utility company immediately.

Unit failure as a result of operation on improper line

voltage or excessive phase imbalance constitutes abuse

and may cause damage to electrical components. Such

operation would invalidate any applicable Carrier

warranty.

START-UP

Preliminary Checks

1 Check that all internal wiring connections are tight

and that all barriers, covers and panels are in place.

2. Field electrical power source must agree with unit

nameplate rating

3 All service valves must be open.

4. Crankcase heater must be tight on compressor

crankcase.

Leak Test field piping and fan coil by pressure method

described in Carrier Standard Service Techniques

Manual, Chapter 1, Section 1-6. Use R-22 at approxi

mately 25 psig backed up with an inert gas to a total

pressure not to exceed 245 psig.

Before starting unit, crankcase heater must he on for

24 hours to he sure all refrigerant is out of the oil. To

energize crankcase heater, proceed as follows: set space

thermostat above ambient so there will be no demand for

cooling. Close field disconnect. The crankcase heater

is now energized.

Evacuate and Dehydrate field piping and fan coil

by either of the methods described in Carrier Standard

Service Techniques Manual, Chapter 1, Section 1-7.

A CAUTION

Service valves must be fully backseated to close

service port. There is no Schrader valve at the service

port and failure to backseat the valve could result in

loss of system charge or personal injury.

1 2 3 4 5 6 7 8 9 10 11 12

Comments to this Manuals

No comments

Carrier 38HD User Manual Page 7

Comments to this Manuals

Related products and manuals for Conditioners Carrier 38HD