EPTA GLEE 55 LITE KW User manual

SERVICE MANUAL GLEE 55 KW (short version) inglese
Autori: Serralunga M.
11/11/2022
1
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GLEE 55 LITE KW
Service Manual
COQ
Project:
GLEE55LITEKWServiceManual(shortversion)

SERVICE MANUAL GLEE 55 KW (short version) inglese
Autori: Serralunga M. 11/11/2022
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NO COPYING IN ANY FORM WITHOUT WRITTEN PERMISSION FROM EPTA QUALITY MANAGEMENT
TABLE OF CONTENTS
1. AMOUNT OF REFRIGERANT IN THE EQUIPMENT 3
2. REFRIGERATION SCHEMATICS FOR THE EQUIPMENT 4
2.1. REFRIGERATION DIAGRAM 4
2.2. REFRIGERATION DIAGRAM FOR DEFROST CYRCLE 5
2.3. VIEW OF MOTOR COMPARTMENT 6
2.4. VIEW OF THE EVAPORATOR COMPARTMENT 8
3. POSITION OF PROBE IN THE CABINET 9
4. ALARMS FOR MULTIFREEZ PLUS (Danfoss Controller) 10
5.REPLACEMENTOFCOMPONENTS 10
5.1. SAFE OPERATING PROCEDURES FOR REFRIGERAION UNIT USING R290 10
5.2. PROTECTION TOOLS AND DEVICES FOR SERVICEMENT 11
5.3. HOW TO EMPTY THE COOLING CIRCUIT AND PROVE IT BEFORE SERVICING 14
5.4. COMPRESSOR REPLACEMENT 15
5.5. UNSOLDER COPPER PIPE TUBE 15
5.6.COMPRESSORREMOVING 16
5.7. NEW COMPRESSOR INSERTION 16
5.8. HIGH PRESSURE PIPE CLOSING 17
5.9. REFRIGERANT GAS CHARGING AND THERMODYNAMIC CIRCUIT CLOSING 18
5.10. CHECK THE CORRECT CLOSING OF THERMODYNAMIC CIRCUIT 21
5.11. REPLACEMENT OF CONDENSER MOTOR FAN 22
5.12. REPLACEMENT OF EVAPORATOR MOTOR FAN 22
5.13. REPLACEMENT OF SOLENOID VAVE 23
5.14. REPLACEMENT OF ELECTRONIC CONTROLLER 24
5.15. REPLACEMENT OF LED BAR 25
5.16.DOORREPLACEMENT 25
6. MAIN CABINET FUNCTIONS 28
6.1. DISPLAY UNIT AND MAIN PARAMETERS 28
6.2.USEOFLEDS 28
6.3. TEMPERATURE SETTING 29
6.4. REFRIGERATOR SHUTDOWN 29
6.5. CHANGE FAHRENHEIT SETTING TO CELSIUS 29
6.6. CHANGE LOW AND HIGH TEMPERATURE PARAMETER ALARM 29
6.7. ELECTRONIC CONTROLLER PARAMETERS 30
7.WIRINGDIAGRAM 33
7.1.WIRINGDIAGRAM 33
7.2. WIRING DIAGRAM LEGEND 34

SERVICE MANUAL GLEE 55 KW (short version) inglese
Autori: Serralunga M.
11/11/2022
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1. AMOUNT OF REFRIGERANT IN THE EQUIPMENT
The most prominent feature of the GLEE 55 LITE V2 KW versions is that they use a natural gas:
propane (R290).
MODEL
AMOUNT OF
PROPANE*
[
g
rams] / [Ounce] 
GLEE 55 LITE V2 KW
138 / 4,87
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(*) The propane refrigerant R290 to be used must be technical-gas rated, with purity grade above 99,5%.
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PROPANE IS HEAVIER THAN AIR, WHICH MEANS THAT IT WILL
TEND TO CONCENTRATE NEAR THE FLOOR OF THE ROOM.
The flammability limit percentage (in a volume of air) is between 2,2% and 9,2% (at 25°C and 1bar).
In mass terms:
If the entire amount of refrigerant is released in the food compartment of VALZER KW, this would become
a flammable zone.
39g/m3177
g
/m3
Striking will not cause
flames Striking will not cause
flames
0% Striking will not cause
flames
100%

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2. REFRIGERATION SCHEMATICS FOR THE EQUIPMENT
2.1 REFRIGERATION DIAGRAM FOR THE COOLING CYCLE
The compressor runs warm gas through evaporating tray, condenser and frame pipe.
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Point into which
nitrogen needs to be
blown to remove
propane from the
pipework.

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2.2 REFRIGERATION DIAGRAM FOR THE DEFROST CYCLE
The NC solenoid valve opens and allow gas to run through the drip tray serpentine and then into the
evaporator.
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Point into which
nitrogen needs to be
blown to remove
propane from the
pipework.
Point into which
nitrogen needs to be
blown to remove
propane from the
pipework.
Point into which
nitrogen needs to be
blown to remove
propane from the
pipework.

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2.3 VIEW OF THE MOTOR COMPARTMENT AND RELEVANT PIPEWORK
VIEW OF MOTOR COMPARTMENT – FRONT SIDE
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VIEW OF MOTOR COMPARTMENT – REAR SIDE
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CONDENSER MOTOR
FAN
EVAPORATING WATER
TRAY
CONDENSERS
DRIP TRAY
SERPENTINE
SERVICE TUBE SOLENOID VALVE
FRAME HEATING PIPE SUCTION PIPE –
EVAPORATOR OUTLET
COMPRESSOR
FILTER DRYER
TRANSFORMER

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VIEW OF MOTOR COMPARTMENT – MOTOR HOUSING
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SERVICE TUBE
COMPRESSOR
VACUUM TUBE
SOLENOID VALVE
EVAPORATING WATER
TRAY
CONDENSER
CONDENSER MOTOR
FAN
COMPRESSOR –
SUCTION PIPE
FRAME HEATING PIPE
- CONDENSER
TRANSFORMER

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2.4 VIEW OF THE EVAPORATOR COMPARTMENT AND RELEVANT
PIPEWORK
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DRIP TRAY
SERPENTINE
DRIP TRAY SEPRENTINE –
SOLENOID VALVE
SUCTION PIPE –
EVAPORATOR OUTLET
CAPILLARY –
EVAPORATOR INPUT
DEFROST PROBE

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3. POSITION OF PROBES IN THE CABINET
There are two probes in GLEE 55 LITE V2
Front view:
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Model Position of
probe
Probe
Colour Function Probe Epta code
GLEE 55 LITE V2
KW
Evaporator
Tank
Yellow
Gray
Defrost end
Display - Thermostat
55883032
55883031
Defrost probe on evaporator
outlet tube
(y
ellow
)
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Temperature probe on fans carter
(grey)

SERVICE MANUAL GLEE 55 KW (short version) inglese
Autori: Serralunga M.
11/11/2022
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4. ALARMS (DANFOSS Controller)
ALARM CAUSE OUTPUTS
“Hi” High temperature alarm Blink “Hi” with the Highes temperature; if
configured: cut In alarm relay,beep the buzzer.
“Lo” Low Temperature alarm Blink "Lo" with the lowest temperature. lf
configured: cut in alarm relay, beep the buzzer.
“Con”
Condenser alarm Blink "Con". lf configured: cut in alarm relay, beep
the buuer.
“dor”
Door open alarm Blink "dor". lf configured: cut in alarm relay, beep
the buuer.
5. REPLACEMENT OF COMPONENTS AND REPAIR OF A LEAK
The instructions below, which involve opening the refrigerating circuit, must be performed in a
place with sufficient air circulation and not in the sales area.
5.1 SAFE OPERATING PROCEDURES FOR REFRIGERATION UNITS
USING R290
Before carrying out any kind of maintenance operation on the refrigerator, make sure that the
machine is disconnected from power (unplugged).
R290 (Propane CH3CH2CH3) is a flammable natural refrigerant (Hydrocarbon HC) having
lower explosive limit ( LEL %V/V) = 1.7.
The very low quantity of refrigerant used and the safe design (possible ignition sources far
from the potential explosive areas) make this unit totally safe in use. Caution must be used
during servicing and with this respect it is essential to understand the basic concept of
flammability.
Three ingredients are needed for a fire: a fuel at the right concentration, a supply of oxygen
(normally from air) and a source of ignition. The common way of illustrating this is by means
of the fire triangle.
Eliminating at least one but preferably two of these ingredients fire can be prevented.
In order to achieve this, three general guidelines should be followed during servicing:
F1. Containment of the substance;
F2. Avoidance of ignition sources;
F3. Use of ventilation.

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F1. Containment
The flammable substances must be kept within a suitably designed and constructed
“container”, be it a suitable cylinder or a refrigeration system. If the substance leaks, it should
be prevented from spreading to other areas.
F2. Ignition sources
Ensure that all the obvious and unobvious ignition sources have been removed from the
equipment and handling areas. Ignition sources can vary greatly and may include sparks from
electrical equipment or welding and cutting tools, hot surfaces, open flames from heating
equipment, smoking materials, etc.
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F3. Ventilation
There should be adequate airflow where flammable substances are stored and used.
Good ventilation will mean that any vapor arising from a leak or a release will be rapidly
dispersed. In case one of the components of the refrigerating hermetic circuit (compressor,
dryer, condenser, evaporator, capillary) needs to be serviced, the basic safe guideline must be
always followed:
NEVER USE FLAMES OR HEAT SOURCES IF
FLAMMABLE REFRIGERANT IS PRESENT
INSIDE THE REFRIGERATING CIRCUIT
Flames can be used only when there is evidence that no flammable substance is still inside the
circuit or the circuits; IN CASE OF MULTIPLE CIRCUITS NONE OF THEM MUST CONTAIN
FLAMMABLE SUBSTANCES in case heat sources are to be used: all circuits need to be emptied
and absence of flammable substances must be proved.
IMPORTANT
Provisions for all jobs involving the opening of the refrigerating circuit:
‐SHUT DOWN THE POWER SUPPLY
‐MANDATORILY WEAR GLOVES AND GLASSES
‐DO NOT WORK WITH OPEN FLAMES BEFORE THE PIPEWORK HAS BEEN CUT!
‐REMOVE ALL SPARK SOURCES FROM THE WORKING AREA (LIGHTERS, LAMPS,
CIGARETTES).
5.2 PROTECTION TOOLS AND DEVICES FOR SERVICEMENT
Protection tools:

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Devices for service personnel:
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LOWPRESSURE
SUCTIONGAUGE
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REFRIGERANTPLIER
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ELECTRONICLEAK
DETECTOR
REFRIGERANT
JUNCTIONS
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LOKRINGJOINTPLIER
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LOKRINGCAP
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REFRIGERANTGAS
CONTAINER
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NITROGENGAS
BOTTLE

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REFRIGERANTSCALE
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VACUUMPUMP
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LOKPREPSEALANT
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ORBITALCUTTER
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SCREWDRIVER
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WRENCHn°10
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5.3 HOW TO EMPTY THE COOLING CIRCUIT AND TEST IT BEFORE
SERVICING
The refrigerating unit has a double servicing pipe, on the low (A) and on the high (B) pressure
sides: in order to totally remove the flammable refrigerant from the refrigerating circuit both
pipes are to be opened by using an orbital cutter (C).
Cut the capillary tube (D) exiting the filter dryer.
When the inside pressure is equalized with the ambient pressure, blow nitrogen at 10 bars in
the circuit through the service pipe on high pressure side (B) and check that it flows out through
the other service pipe on the low pressure side; continue to blow nitrogen for at least 5 minutes.
At the end of this procedure NO FLAMMABLE REFRIGERANT CAN REMAIN INSIDE THE
CIRCUIT IN SUCH A QUANTITY TO BE DANGEROUS WHEN FLAMES OR HEAT
SOURCES ARE USED.
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A
C
B
D
Also cut the pipe
entering the filter
and replace the
filter dryer with a
new one.
Nitro
g
en

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5.4 COMPRESSOR REPLACEMENT
5.5 UNSOLDER COPPER PIPE TUBE
When no more refrigerant gas is inside the thermodynamic circuit, unsolder from compressor
the charge pipe (A), the suction pipe (1) and the discharge pipe (2).
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GLEE 55 LITE KW
Epta code: 21848072
Model: EMBRACO NEU2168U
115V 60HZ R2
Epta code for filter: 80103000
Model: Filter gr 15 – Holes 5-3,2
Note: when the compressor is replaced the filter drier must be replaced too
1
A
2

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5.6 COMPRESSOR REMOVING
Unscrew the 4 compressor screws by using a wrench n°10.
Use a screwdriver to remove the inverter.
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5.7 NEW COMPRESSOR INSERTION
Fix the new compressor to the motor plate with 4 screws (wrench n°10) and then fix the inverter
(screwdriver).
After securing the compressor to the plate, braze the discharge and suction pipes, then cut the capillary
terminal by a 45° diagonal cut, insert it into the filter outlet (max 3cm) and braze it. Braze the pipe exiting
the condenser to the filter inlet.
When the circuit is closed, charge the circuit with helium/nitrogen up to a pressure of 8 bar; check for
possible leakages on brazing points.
Connect the vacuum pump to the compressor service tube and to the high pressure pipe and hold the
vacuum for a period of 30-40minutes (check vacuum pump characteristics and manual for the correct
procedure).The vacuum degree to be achieved is below 15 Pa (0,15 mbar).
WARNING! Wrong vacuum execution may cause problems on the refrigerator performances.

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5.8 HIGH PRESSURE PIPE CLOSING
After 30-40 minutes of vacuum, disconnect the vacuum pump only on the high pressure pipe
(B).
Take the plier (3) and pinch the high pressure pipe (B), then remove refrigerant junction.
Put a drop of Lokprep sealant (4) on the high pressure pipe terminal (B).
Insert a Lokring cap (5) on the high pressure pipe (B). Rotate the cap (5) for correctly
distribute the sealant (4).
3
B
4
B
1
5B

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By using the Lokring plier (6) fix the cap (5) on the copper pipe (B).
5.9 REFRIGERANT GAS CHARGING AND THERMODYNAMIC CIRCUIT
CLOSING.
Check the nominal refrigerant gas charge on the data label of the cabinet (in g / oz).
Using a scale (7) with an adequate precision (±1g / ±0.01oz), verify the quantity of refrigerant
gas in the gas container (8).
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6
5
B
C
D

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Disconnect the vacuum pump from the compressor service tube (A); connect the gas
container (8) to the circuit, and measure the amount of refrigerant gas introduced in the
circuit.
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If necessary, switch on the refrigerator, in order to introduce further refrigerant gas; the final
charge should be the nominal value with a tolerance of ±3% in mass.
WARING! In order to avoid damages to the thermodynamic system components, do not
switch on the refrigerator without any refrigerant gas inside the circuit.
Disconnect the refrigerant container from the circuit at the end of the charging process, then
keep the refrigerator on for 5-6 minutes. Switch off and disconnect from the power supply.
Take the plier (3) and pinch the compressor service tube (A), then remove refrigerant
junction.
R
2
9
0
3
A
Picture example
of compressor

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Put a drop of Lokprep sealant (4) on the compressor service tube terminal(A).
Insert Lokring cap (5) on the compressor service tube (A). Rotate the cap (5) for
correctly distribute the sealant (4).
By using the Lokring plier (6) fix cap (5) on the tube (A).
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4
A
1
5A
6
5
A