Compact CP 30SC E, CP 30 E, CP 45 E, CP 70 E, CP 120 E Service Manual

SERVICE MANUAL

SELF CONTAINED UNITS WITH TIMER

CP 30SC E

CP 30 E
CP 45 E
CP 70 E

CP 120 E

Ice Machines UK Ltd

Unit 10, LDL Business Centre, Station Road West, Ash Vale, Surrey, GU12 5RT

Tel: [phone] Fax: [phone]

www.icemachines.co.uk e-mail: [e-mail]

LEV1FG-296

ICE CUBES MAKERS

F.A.G. SRL

SELF CONTAINED UNITS WITH TIMER

ME-CPT1-199 COMPACT SERVICE MANUAL

INDEX

1. HOW IT WORKS 1

1.A. REFRIGERATION SYSTEM 1

1.A.a. Freezing cycle 2

1.A.b. Defrost cycle (harvest) 2

1.A.c. Air cooling 2

1.A.d. Water cooling 2

1.B. WATER SYSTEM 4

1.B.a. Freezing cycle 4

1.B.b. Defrost cycle (harvest) 4

1.B.c. Ice storage bin 4

1.C. ELECTRICAL SYSTEM 5

1.C.a. Water cooled models 8

2. INSTALLATION 9

2.A. CONNECTIONS 9

2.B. SET-UP 9

2.B.a. Air cooled condenser units 9

2.B.b. Water cooled condenser units 10

3. START-UP & TEST 10

3.A. START-UP 10

3.B. TEST 11

4. CLEANING 11

4.A. CONDENSER CLEANING 11

4.B. INTERNAL CLEANING & SANITIZING 12

4.B.a. Cleaning - To remove lime scale or other mineral deposits 12

4.B.b. Sanitizing - To remove algae or slime 13

5. GENERAL INFORMATION 14

5.A. WEIGHTS & DIMENSIONS 14

5.B. CUBE SIZE 15

5.C. MODEL NUMBER BREAKDOWN 15

5.D. GENERAL DATA 16

5.E. PRODUCTION 17

5.E.a. Theoretical daily ice production - N. of cubes/24h 17

5.E.b. Theoretical daily ice production - kg/24h 18

5.F. WATER VALVE & FLOW REGULATOR CHART 19

5.F.a. Air cooled 19

5.F.b. Water cooled 19

F.A.G. SRL

SELF CONTAINED UNITS WITH TIMER

ME-CPT1-199 COMPACT SERVICE MANUAL

PAG.1

1. HOW IT WORKS

The system is very simple and efficient. The evaporator is built up connecting together a series of
reversed cups with a cooling coil. The refrigerant flows into the tubes while the pump sprays water
into the cups. Thus inside each cup, an ice cube grows layer by layer.
When the cubes are ready, harvest starts : hot gas flows through cooling coil of the evaporator and
fresh water enters on top of evaporator. This melts the outer surface of the cubes which fall into the
bin.
A new freezing cycle then begins.
When the bin is full of ice, the unit stops production. When a quantity of ice is taken away, the unit
restarts production.

1.A. REFRIGERATION SYSTEM

REFRIGERATION TUBING SCHEMATICS

C

VG

V

F

PT

B

S

E

230V

T

CD

mod. CP70 - CP120

TE

→

←

↑

↓

←

←

→

→

↑

AIR COOLED

C

Compressor

V

Fan motor

VG

Hot gas valve

T

Capillary tube

CD

Air cooled condenser

PT

Pressure switch
CP70, CP120 only

F

Molecular sieve

E

Evaporator

B

Receiver

S

Heat exchanger

TE

Evaporator thermostat

F.A.G. SRL

SELF CONTAINED UNITS WITH TIMER

ME-CPT1-199 COMPACT SERVICE MANUAL

PAG.2

1.A.a. Freezing cycle

1. The compressor C pumps the refrigerant to the condenser CD or CA when the hot gas valve

VG

is closed.

2. The liquid line reaches the evaporator E through the molecular sieve F and the capillary tube T.

3. In the evaporator the refrigerant expands, thus producing the freezing effect.

4. The refrigerant goes back to the compressor through the receiver/tank B and suction line/heat
exchanger S.

5. The freezing cycle ends when the evaporator thermostat TE reaches the set temperature thus
starting the TIMER; when the time is over, the refrigeration cycle ends and the VG hot gas
valve is opened.

1.A.b. Defrost cycle (harvest)

1. When the hot gas valve VG open, refrigerant flows directly from the compressor C to the
evaporator E and back to the compressor through S.

2. Duration of harvest is fixed by the timer. There is a delay in starting the TIMER in the defrost
period. The TIMER is energized when the evaporator thermostat TE reaches the preset high
'IN' temperature; for this reason the motor of the TIMER is connected directly with the
COMMON contact of the evaporator thermostat. When the harvest ends, the timer is de­energized, the hot gas valve VG is closed and a new freezing cycle begins.

1.A.c. Air cooling

1. Models with air cooled condenser, have a fan motor V which is always energized (mod. CP30,
CP45) or is switched on and off by the pressure switch PT, (mod.CP70, CP120) which senses
condensing pressure.

2. Pressure switch PT is factory set. After sale service is

not allowed

to make adjustments for any

reason.

1.A.d. Water cooling

1. Models with water cooled condenser, have a fan motor V which is always energized.

2. Water inlet to condenser is regulated by the pressure switch PT, which senses condensing
pressure and energizes or not the condenser water inlet solenoid valve VC.

3. The safety thermostat

TSA

feels condensing temperature, too. In case of excessive temperature,
due e.g. to water shortage, valve failure etc., it shuts down the unit. When temperatures
decreases, it starts again.

4. Condenser thermostats and pressure switch are factory set. After sale service is

not allowed

to

make adjustments for any reason.

F.A.G. SRL

SELF CONTAINED UNITS WITH TIMER

ME-CPT1-199 COMPACT SERVICE MANUAL

PAG.3

REFRIGERATION TUBING SCHEMATICS

C

VG

V

F

PT

VC

B

S

E

CA

230V

⇐⇐⇐⇐

⇒⇒⇒⇒

T

1

2

TSA

TE

↑

↓

←

→

→

→

←

←

↑

WATER COOLED

C

Compressor

V

Fan motor

VG

Hot gas valve

VC

Condenser water valve

TSA

Safety thermostat

T

Capillary tube

CA

Water cooled condenser

PT

Pressure switch

TE

Evaporator thermostat

F

Molecular sieve

E

Evaporator

B

Receiver

S

Heat exchanger

⇐

c

Water inlet

⇒

d

Water drain

F.A.G. SRL

SELF CONTAINED UNITS WITH TIMER

ME-CPT1-199 COMPACT SERVICE MANUAL

PAG.4

1.B. WATER SYSTEM

P

Pump(s)

SB

Spray bar(s)

WT

Water tank

VA

Inlet water valve

E

Evaporator

OF

Overflow

⇐

c

Water inlet

⇒

d

Bin overflow drain

⇒

e

Tank overflow drain

1.B.a. Freezing cycle

1. The pump P takes water from the water tank WT through a suction pipe and sends it to the
spray bar SB (two pumps and two spray bars for mod. CP120).

2. The water sprayed by the nozzles reaches the cooled cups on the evaporator E. A quantity of
water freezes and the excess falls again into the water tank.

3. The water inlet valve VA is closed.

1.B.b. Defrost cycle (harvest)

1. The water inlet valve VA is open. Fresh water goes up on top of evaporator, helping defrost.

2. From the top of the evaporator, water falls into the water tank and refills it.

3. Excess water is discharged by the overflow control OF.

4. Water pump(s) is not working.

1.B.c. Ice storage bin

1. Water from melted ice is drained separately, and does not enter again into the water system.

E

WT

OF

P

SB

c

⇐

⇒

d

e

⇒

mod. CP30 - CP45

CP70

SB

VA

⇐⇐⇐⇐

1

⇒⇒⇒⇒

3

P

OF

WT

P

E

⇒⇒⇒⇒

2

mod. CP 120 only

F.A.G. SRL

SELF CONTAINED UNITS WITH TIMER

ME-CPT1-199 COMPACT SERVICE MANUAL

PAG.5

1.C. ELECTRICAL SYSTEM

•

Compressor is always ON. Fan motor is regulated by the pressure switch

PT

only in models

CP70 & CP120. In models CP30sc, CP30 & CP45 fan motor is always ON.

•

The bin thermostat

TB

opens, when the ice-feeler is in contact with ice. The unit then stops.

WIRING DIAGRAM

air cooled

T

TB

PT

C

V

P

VG

VA

C

TE

2

4

TIMER

C

C

NC

NO

3

4

B

B

B

B

B

B

B

BM

M

M

M

M

M

V

V

R

R

R

RV

P

A

CP70 - CP120

a

b

A) Start of freeze cycle

C

compressor

ON

V

fan motor

ON (PT)

P

pump

ON

T

timer

OFF

a

micro a

C-NO

b

micro b

C-NO

VG

gas valve

OFF

VA

water valve

OFF

TE

evaporator
thermostat

WARM (C-4)

TB

bin thermostat

closed

A) Start of freeze cycle.

The pumps spray water to the cups on the evaporator which is freezing.

The evaporator thermostat TE has not reached set-point. It is in WARM position.

M

Brown

B

Blue

V

Green

R

Red -

A

Orange

P

Pink