Emerson ZB Copeland Scroll Informations techniques télécharger pdf (Page 9)

6 C6.1.7/0609-1110/E

4) Alco Controls PT5 Pressure Transmitter

Digital Scroll™ units are equipped with HP and LP pressure transmitters,

connected to the EC2 electronic unit controller.

An Alco PT5-30M pressure transmitter is used at the high-pressure part of

the system. An Alco PT5-07M pressure controller is used at the low-pressure

part of the system. The PT5 pressure transmitter converts a pressure into a

linear electrical 4-20 mA current output signal. The heart of the transmitter is

a piezo resistive chip enclosed in an oil capsule.

2.7.5 Liquid line equipment

1) Filter drier Alco Controls ADK-plus

ADK-165 liquid line filter drier is for new installation or after service. Optimum

blend of molecular sieve and activated alumina.

2) Liquid sight glass Alco Controls AMI 1SS*

The AMI series of moisture indicator is designed to monitor the moisture

content within the liquid line of a refrigeration system. When the line is empty

of liquid, circles may be seen in the glass. However, when the liquid

refrigerant touches the glass, the circles disappear indicating the system is

fully charged.

2.7.6 Solenoid valve for Copeland Scroll Digital™ compressor

Copeland Scroll Digital™ compressors in Digital Receiver units HLR are equipped with a 24-volt

AC solenoid valve. The electronic condensing unit controller operates the solenoid valve used

for digital compressor modulation based on the suction pressure.

2.7.7 Oil separator: Alco Controls OSH

The Alco Controls OSH-407 oil separator is fitted as standard on two-compressor Digital

Receiver units HLR. The oil separator has the following characteristics:

 Hermetic construction

 Comply with UL standard and HP German pressurised vessel regulations (CE standard

effective Nov. 1999)

 PED category I

NOTE: The oil separator is not charged with oil. The installer has to charge the system

during the first hours in operation. Please refer to section 4.1 "Charging procedure".

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Emerson ZB Copeland Scroll Informations techniques Page 9