Emerson E2 Manual do Operador descarregar pdf (Página 48)

5.1 Demand Cooling Service Procedures

The demand cooling valve injects liquid refrigerant

into the suction manifold to keep the discharge gas

temperature within a safe operating range. Excessive

discharge gas temperature will lead to ring and cylin-

der wear, valve wear and oil coking. Each Intelligent

Store™ Discus® compressor has a temperature

probe in the head to continually monitor the discharge

gas temperature. The injection valve is energized

when the temperature of the probe exceeds the

“Injection Start” temperature. When the probe temper-

ature drops below the “Injection Stop” temperature,

the injection valve closes (is de-energized). Refer to

table 5.2 below for reference temperatures by model.

Note that the temperatures shown for 2D and 3D

5. Maintenance Procedures for

Intelligent Store™ Discus®

Compressors

Emerson Climate Technologies, Inc. requires that all

customers review the recommended guidelines in the

published Application Engineering Bulletins, and

ensure that best engineering practices are followed in

the use of Copeland® brand compressors. Emerson

Climate Technologies, Inc. Application Engineering

Bulletins can be found on our website,

EmersonClimate.com under the section titled “Online

Product Information”. The advice and conclusion by

Emerson Climate Technologies, Inc. represents our

best judgment under the circumstances, but such

advice given and/or conclusion made, or results

obtained shall be deemed used at your sole risk.

Reference Drawing of 2D / 3D Enclosure and Accessories

TEMPERATURE SENSOR

GROUND SCREW

LOW PRESSURE CUTOUT SWITCH AND CONNECTOR

White Dot in Center

Blue Wire Harness (LPCO)

HOUSING COVER NUTS

SCREWS “A”

FRONT CONTROL BOX

HARNESS ANCHOR

HIGH PRESSURE CUTOUT SWITCH AND CONNECTOR

Red Dot in Center

Red Wire Harness (HPCO)

DISCHARGE TEMPERATURE PROBE

Black/White Harness

Attach Green Wire to Ground Screw

SCREW “B”

SIDE BOX

DEMAND COOLING

SOLENOID COIL

Brown Wire Harness

(Liquid Injection)

HARNESS CONNECTORS

To Remove: Depress 2 tabs before pulling

To Install: Push in until connector “snaps”

Install Torque

25-30 ft-lb

Figure 5.1 2D/3D Enclosure Label

Head Probe

Location

Standard ISD & Standard

Head Temperature (°F)

Standard

Demand

Cooling

2D/3D

ISD

Maximum (Trip)

Reset

Liquid Injection Start

Liquid Injection Stop

310

292

282

280

250

266

264

310

268

292

282

Figure 5.2 Head Temperature Comparison

ISD

AE8-1337 R1

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 70 71

Comentários a estes Manuais

Sem comentários

Emerson E2 Manual do Operador Página 48

Comentários a estes Manuais

Manuais e produtos relacionados com Controlos remotos Emerson E2