Carrier 06D Bedienungsanleitung PDF herunterladen (Seite 6)

Compressor Unit Connections

— Extend power leads from

control center (contactor terminals) to compressor terminal box

and make connections as shown in Fig. 4.

Terminals 8 and 9 on motor terminal plate are for internal

protector connections. As shown in Fig. 4, run a wire from ter-

minal 9 to terminal 6 on TB2 in control center and a wire from

terminal 1 on OL2 to terminal 2 on HPS in control center.

Run crankcase heater power wiring into control center.

Connect leads to terminal 5 on pumpout relay and terminal 3

on terminal block TB2. See Fig. 5.

Affix power warning label supplied in the installer’s packet

to fused disconnect which energizes crankcase heater (see unit

label diagram).

CONTROL WIRING — Control circuit power is 115 volts,

energized from an external source or from unit voltage through

field-supplied transformer. Transformer size required is 350 va

for 60 Hz units. External control power source must be

supplied through a 15-amp fused disconnect. Connect control

circuit power leads to terminal block TB2, terminals L1 and

L2. Terminal L2 is neutral potential (ground).

Compressor Protection

— The 06D and 07D units are factory

wired for single-pumpout control. Field addition and wiring of

line voltage remote control and liquid line solenoid valve is

required. (See unit Fig. 3 and Fig. 6.) Remote control minimum

contact rating must be 25 va. Solenoid valve must have a

maximum load rating of 50 va holding; 200 va inrush. For

applications with cooling tower, air-cooled or evaporative

condensers, add necessary auxiliary contacts in line between

compressor contactor and terminal A1 on timer. Insert desired

interlocks and overloads between terminals 5 and 9 on terminal

block TB2.

Control wiring may be modified as shown in Fig. 6 for

automatic pumpdown control; remove low-pressure switch

between timer relay and terminal 4 on TB2. Wire low-pressure

switch between terminals 9 and 6 on TB2. Add necessary

auxiliary contacts between compressor contactor and terminal

A1 on timer. Remove wire between terminal 6 on TB2 and

terminal 3 on pumpout relay. Insert required interlocks and

overloads between terminals 5 and 9 on TB2.

Limitations —

Do not use automatic pumpdown control

on direct expansion cooler applications or when compressors

are equipped with pressure-type unloader valves. Pressure

unloader valves have built-in high to low passage which allows

compressor to cycle with automatic pumpdown.

LEGEND

Fig. 4 — Compressor Terminal Diagram

HPS —

High-Pressure Switch

OL —

Overload Relay

TB —

Terminal Block

Factory Wiring

Fig. 5 — 06D/07D Control Box Components and Connections (3-Phase)

LEGEND

NOTES:

1. Factory wiring is in compliance with NEC. Any field modifications or

additions must be in compliance with all applicable codes. Use copper,

copper-clad aluminum for field power supply only.

2. Field power supply wiring must be 75 C minimum.

3. Compressor thermally protected. Three-phase motors are protected

against primary single-phasing condition.

4. Pilot duty control must be field supplied. Minimum contact rating must

be 25 va.

5. 60 Hz units have 120-volt control circuit. 50 Hz units have 230-volt con-

trol circuit. A separate source of supply at the correct voltage must be

field supplied thru a fused disconnect device with a max rating of 15 A

to TB2 connections (Hot Side) and (Neutral).

6. Open control circuit disconnect switch for servicing only. Disconnect

must remain closed for crankcase heater to operate.

7. A transformer of the following rating may be field supplied for 60 Hz

units: 350 va.

8. Transformer must be fused and grounded per applicable codes.

9. If any of the original wiring furnished must be replaced, it must be

replaced with 90 C wire or its equivalent.

C—

Contactor, Compressor

NEC —

National Electrical Code

CH —

Crankcase Heater

OL —

Overload Relay

CR —

Control Relay

OPS —

Oil Pressure Switch

FU —

Fuse

POR —

Pumpout Relay

GND —

Ground Connection

SW —

Switch

HPS —

High-Pressure Switch

TB —

Terminal Block

IP —

Internal Protector

TM —

Timer Motor

LPS —

Low-Pressure Switch

TR —

Timer Relay

1 2 3 4 5 6 7 8 9 10 11 ... 19 20

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