Brochure

36 AB218186428184en-US1501

GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN

Provide power supply and electrical protection

Requirements:

• An additional external overload protection is

still advisable for either alarm or manual reset.

For overload setting, take the max current

you can face on the application and add

10%. Setting must always be lower than Max

Operating Current (see table “Three phase

electrical characteristics” from the section

“Electrical data, connections and wiring”)

• HP safety switch and DGT must be wired in the

safety chain. Other safety devices such as LP can

be either hardware or software managed.

• Provide separate electrical supply for the

heaters so that they remain energized even

when the machine is out of service (e.g.

seasonal shutdown).

The wiring diagrams below are examples for a safe and reliable compressor wiring:

Wiring information

Control device .................................................. TH

Optional short cycle timer (3 min) ......... 180 s

Control relay .................................................... KA

Liquid Line Solenoid valve .........................LLSV

Compressor contactor .................................. KM

Phase monitor ................................................ PM

Safety lock out relay ........................................KS

Pump-down control low pressure switch ..LP

High pressure safety switch........................ HPs

Fused disconnect ............................................ Q1

Fuses ...................................................................F1

Compressor motor ...........................................M

Discharge gas thermostat ......................... DGT

DGT

HPs

180 s

CONTROL CIRCUIT

F1F1

KA KA

L1 L3 L2

LLSV KS

Wiring diagram with pump-down cycle

Note:

For H-series compressor, phase monitors are mandatory. The selected phase monitor should lock out

the compressor from operation in reverse.