verdichter - HKT-Goeldner

GOELDNER-VERDICHTER
TWO-STAGE SEMI-HERMETIC GOELDNER-COMPRESSORS
HZ 22 3 - HZ 54 3
Goeldner two-stage (compound) compressors are used for applications where evaporating temperatures below -
50°C are required. The two cylinder model operates with one high and one low pressure cylinder, whereas the
four cylinder compressors operate with two low and two high pressure cylinders. During the low pressure stage
the refrigerant is compressed and following this the heat created is dispersed by means of the finned intercooler
which is cooled by forced air. The refrigerant then passes through the high pressure stage before being
transferred to the condenser. The division of compression into more than one stage makes it possible to cool the
compressed gas between the stage and so avoid excessive final delivery temperatures. The Goeldner two-stage
semi-hermetic compressors are manufactured to strict specifications, they are extremly quiet running and
incorporate a high degree of standarisation to keep costs to a minimum and allow easy and economical
replacement of parts. These compressors are simple and robust machines capable of running continuously for
prolonged periods with the minimum of attention.
DESIGN
HZ 22 3: two cylinder compressor
HZ 34 3 to HZ 54 3: four cylinder compressors
MOTOR AND COOLING
The compressor type HZ 22 3 isequipped with a standard motor for three phase current 230/400V, 50/60 cycles.
The types HZ 34-54 are equipped with a standard motor for three phase current 400/690V, 50/60 cycles; other
voltages can be supplied on request. The windings incorporate thermal switches providing an additional motor
protection if overloading should occur they cut off over the electronic thermal relais. A switching frequency of 8
times per hour is the safe load. The motor is cooled by forced air over a built in fan on the motor end of the
compressor. The cooling air temperature should not exceed 30°C.
LUBRICATION SYSTEMS
The lubrication of compressor type HZ 22 3 is an oil splasher system.
The standard types HZ 34-54 are equipped with an oil pump. An oil pressure safety sensor is connected to the oil
pump. The pressure difference of the oil is set to 1.4+0.3 bar. The pump works independent from the turning
direction.
RANGE OF DELIVERY
Motor compressor with discharge and suction shut off valves, gas protection charge, oil charge, built in fan for
motor cooling and gas intercooling, intercooler, crank case heater, thermal relais and 4 rubber metal anti-vibration
pads. Type HZ 34-54 are equipped with oil pressure safety switch.
ACCESSORIES AT EXTRA COST
Starting aid, Soft-Starter, watercooled cylinder heads, adapter for oil pressure exchange pipe for parallel
operation for several compressors, oil service valve, hot gas temperature sensor;
K09-01-dbl-0511.doc///2005-02-11 chapt. 9 / page 1
HKT GmbH, Am Graben 8, D-83128 Halfing; Tel. +49(0)8055/9187, Fax +49(0)8055/9188; e-mail info@hkt-goeldner.de; www.hkt-goeldner.de