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12.3
THERMO-STOP (HOT WATER ASSURANCE)
(See Fig. 9-3 in next page for model FI-64W & FI-72W)
The thermo-stop relay (R) works in series with the rinse (booster) heater relay (Cc) and is activated
through M4 This relay insures the timer will not advance to the rinse cycle until the preset temperature
of the rinse water is met, (185° + or –10°). This is the hot temperature assurance feature for the
dishwasher.
The thermo-stop relay is a normally closed contact that is activated thru the rinse (booster) relay when
M4 is closed (2 seconds). If the rinse relay (Cc) is activated, when heating the rinse water, the thermo-
stop relay (R) will also be activated and the contact will be open now.
This in turn will open the circuit between the timer’s run motor, keeping the cycle in the wash mode
until the adequate rinsing temperature is achieved. At this time, operating thermostat (Tc) will change,
so the rinse relay will be deactivated and open, also opening the thermo-stop relay and closing the
circuit to the timer run motor, allowing the cycle to continue to the rinse cycle.
Note: Although the rinse temperature has reached its set guideline, the wash temperature will
still need to heat up to 150°F. This however will not affect the thermo-stop relay.
12.4
SELECTOR SWITCH (IG)
0
: When 0 setting is selected, all the contacts are open.
: When drainage setting is selected, contacts:
2-2a, 4-4a, 5-5a and 8-8a
of the electrical
diagram are closed.
-
When 180 seconds cycle is selected, contacts:
1-1a, 4-4a, 6-6a, 7-7a and 8-8a
of the electrical
diagram are closed.
-
When 90 seconds cycle (FI-64W) or 120 seconds cycle (FI-48W) is selected, contacts
: 1-1a, 3-3a,
4- 4a, 6-6a, 7-7a and 8-8a
of the electrical diagram are closed.
12.5
SAFETY PRESSURE SWITCH
Safety pressure switch (P2) is normally in position 1-2 and activates the drain pump when drain setting
is activated by the selector switch.
P1 is adjusted in order to change position from 1-2 (filling) to 1-3 (operating), once the tank has been
filled up. P2 is adjusted at a higher value of pressure to change from position 1-2 to 1-3. When
position 1-3 is activited, normally in case of overflow or fails on the pressure switch, drain pump
comes on automatically and machine will start draining independently of the selection.
Check out
schematic on page 23.
