Water System - Follett Symphony Plus 50 Series Installation, Operation And Service Manual

Water system

The water level in the evaporator is controlled by a fill solenoid (Fig 13) and level detecting sensors . Water sensing
rods (Fig. 14) extend down into the reservoir at the end of the evaporator assembly . The system works via electrical
conductivity as follows:
One of the longest probes is a common . When water is between any of the other probes and the common, the
PC board will sense the activation . During normal operation, the water level rises and falls between the Normal
High and Normal Low sensors . As water is consumed to make ice, the level will fall until the Normal Low sensor is
exposed, triggering the water feed solenoid on . Water will fill until the Normal High sensor is activated .
Note: The potable water dissolved solids content must be greater than 10 ppm for the water control system to
function properly . If using reverse osmosis water filtration system, ensure T .D .S level is greater than 10 ppm .
Fig. 13 – Water system diagram
VENT
ICE
NOZZLE
DRAIN PAN
TO DRAIN CUP
Fig. 14 – Water level diagram
16
CLEANING CUP
B COMMON
C HIGH
A ALARM LOW
D LOW
B
RESERVOIR FILL
SOLENOID
WATER
RESERVOIR
C
NORMAL OPERATING RANGE
D
A
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
WATER SUPPLY
3/8" FPT, 45-90 F (7-32 C)
10-70 PSI (69-483 KPA)