4.Technical Specification - R22 Machines
MODEL | FCI 20 | FCI 30 | FCI 40 | FCI 60 | FCI 85 |
Output – kg/24hr. | 18 (20.5) | 26 (34) | 34 (42) | 57 (70) | 78 (90) |
Bin storage capacity – kg | 6.5 | 15 | 15 | 27 | 27 |
Cubes per cycle | 16 | 24 | 24 | 48 | 48 |
kg per cycle | 0.28 | (0.38) | 0.42 (0.6) | 0.42 (0.6) | 0.82 (1.2) | 0.82 (1.2) |
Cycle time – minutes | 22 | (25) | 23.5 (24.5) | 15.75 (19.15) | 20.5 (23.6) | 15.25 (18.75) |
Amps start/run | 9.5/1.9 (9.5/1.9) | 11/2.2 (11/2.1) | 16/3.3 (16/3.3) | 16/3.5 (16/4) | 24.5/4.4 (24.5/4) |
Watts consumption | 300 | (280) | 350 (330) | 450 (450) | 650 (650) | 810 (760) |
Water consumption | 5.8lt/hr | 5lt/hr | 6.3lt/hr | 12.5lt/hr | 15.5lt/hr |
Refrigerant | R22 | R22 | R22 | R22 | R22 |
Ref. charge, grams | 300gr | 280gr | 290gr | 420gr | 460gr |
Heat rejection, watts | 500 | 600 | 850 | 1100 | 1600 |
5.Operating Instructions - R22 Machines
5.1Start Up
Affer having correctly installed the ice maker and completed the plumbing and electrical connections, perform the following ‘Start-up’ procedure.
A.Give power to the unit to start it up by switching ‘ON’ the power line main disconnect switch. The 1st GREEN LED will glow.
NOTE: Every time the unit returns under power, after having been switched off, both the water inlet valve and the hot gas valve get energised for a period of 5 minutes, thus to admit new water to the machine sump reservoir to fill it up and, eventually, to wash off any dirt that may be deposited in it during the unit oft period (Fig. 1). Page 13
B.During the water filling operation, check to see that the incoming water dribbles, through the evaporator platen dribbler holes, down into the sump reservoir to fill it up and also that the incoming surplus of water flows out through the overflow pipe into the drain line.
During the water filling phase the components energised are:
THE WATER INLET SOLENOID VALVE, THE HOT GAS SOLENOID VALVE, WATER DRAIN VALVE
NOTE: If in the 5 minutes length of the water filling phase the machine sump reservoir does not fill up to the rim of the overflow pipe, it is advisable to check:
1.The water pressure of the water supply line that must be at least 1 bar (14 psig) Minimum (Max 5 bar-70 psig).
2.The filtering device installed in the water line that may reduce the water pressure below the Minimum value of 1 bar (14 psig).
3.Any clogging situation in the water circuit like the inlet water strainer and/or the flow control.
5.2Operational Checks
C.At completion of the water filling phase (5 minutes) the unit passes automatically into the freezing cycle with the start up of: COMPRESSOR WATER PUMP FAN MOTOR in air cooled version (Fig. 2) Page 13 and the glowing of the 6th RED LED.
D.Check to see through the curtained ice discharge opening that the spray system is correctly seated and that the water jets uniformly reach the interior of the inverted mould cups; also make sure that the plastic curtain is hanging freely and there is no excessive water spilling through it.
E.The ice making process takes place thereby, with the water sprayed into the moulds getting gradually refrigerated by the heat exchange occurring with the refrigerant flowing into the evaporator serpentine.
During the freezing process, when the evaporator temperature falls to 0˚C (35˚F) the evaporator temperature sensor, located in contact with the evaporator serpentine, supplies a low voltage power signal to the electronic control device (P.C. BOARD) which in first instance generates the glowing of the 5th RED LED located in the front of the printed circuit board (Fig. 3). Page 13
F.The unit remains however in its normal freezing cycle mode until the evaporator temperature detected by the sensor reaches the temperature of -13˚C (8.5˚F) on models 20, 30 40 and 60 and to -16˚C (3˚F) on model 85.
When the evaporator temperature falls below the above value, the evaporator temperature sensor supplies a low voltage power signal to the P.C. BOARD in order to activate the electronic timer. This takes over the control of the freezing cycle up to the complete formation of the ice cubes (Fig. 4) Page 13, with the lighting up of the 4th RED LED located just above the previous lighted one.
NOTE The length of the entire freezing cycle is the sum of the lengths of three phases, two of which, (T1 + T2) controlled by the evaporator tempemtum sensor, which has its probe placed in contact with the evaporator serpentine (non adjustable), and ONE. (Ta) by the electronic tImer (Adjustable) incorporated in the P.C. BOARD.
The lengths of the first two phases, related to the evaporator temperature and controlled by its sensor, are:
TI - The time elapsed since the beginning of freezing cycle up to when the evaporator reaches the temperature of 0˚C (35˚F).
T2 - The time required for the evaporator to fall from 0˚C (35˚F) to -13˚C (8.5˚F) or to 16˚C (3˚F).
The third time Ta - Time added - is in relation to one of the different combinations of the five keys 3,4,5, 6, and 7 of the DIP SWITCH located in the front of the P.C. BOARD. The combination is factory set in consideration of the ice maker type and of its cooling version. It is possible, however, to vary the timed length of the freezing cycle, by changing the DIP SWITCH keys settings.
In Table B are shown the various time extensions of the freezing cycle third phase Ta, in relation with the different DIP SWITCH keys settings.
G.After about 20-22 minutes from the beginning of the freezing cycle, in a hypothetic ambient temperature of 21˚C (70˚F), the defrost cycle takes place with the hot gas and the water inlet valves being simultaneously activated (Fig. 5). Page 13
The electrical components in operation in this new situation are:
