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CUBED ICE MACHINE
SPECIFIC NSN4110-01- 136-5830
MiL-1-0011867J
Mason City, lowa 50401
ROSS-TEMP Division of Scnneider Metal Manufacturing Co
GENERIC NSN4110-00- 058-1481
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A
INTRODUCTION
We have strived to produce a quality product. The design has been kept simple,
thus insuring trouble-free operation.
This manual has been prepared to assist servicemen and users with information
concerning installation, construction and maintenance of the ice making
equipment. The problems of the serviceman and user have been given special
attention in the development and engineering of our icemakers.
If you encounter a problem which is not covered in this manual, please feel
free to write or call. We will be happy to assist you in any way we can.
When writing, please state the model and serial number of the machine.
Address all correspondence to:
ROSS-TEMP SERVICE DEPARTMENT
2421 15th STREET S. W.
MASON CITY, IOWA 50401
PHONE: (515) 424-6150
TABLE OF CONTENTS
INTRODUCTION . . . 2 2444 42 LL 2 4 4 VV LL 11 LS 1
TABLE OF CONTENTS. . . . . eee ea ae 2
SPECIFICATIONS . . . © . ©... vv vs te ie i. 3
INSTALLATION AND START-UP. . . . . . . . . . ov vv vu... 4-8
PRINCIPLE OF OPERATION
WATER CIRCUIT . . . . . 2 211 1 4 LL LL LL LL 1110 9
REFRIGERANT CIRCUIT . 1. 222111 4 4 4 LL 11110 10
ELECTRICAL CIRCUIT ©» 1 1 LL 111110 11
HOW IT OPERATES . . . . . . . ere... ena 12-14
ADJUSTMENT OF TIMER FOR ICE THICKNESS. . . . . . . . ...... 14 —
WIRING AND SCHEMATIC DIAGRAMS . . . .. e... e. — .—Ñ oe. . e... 15
INSTALIATION AND REMOVAL OF SOLID STATE TIMER. . . . . . . . . . 16
SANITIZING AND CLEANING PROCEDURE . . . . . . . . . . . . . .. 17
WATER TREATMENT 2. 2222224 4 4 4 4 1 VA LL 1110 17
WINTER STORAGE . . . 2 22224 4 a 1 D 4 4 LL LL 1 11 110 18
CLEANING THE CONDENSER . . . . 2. 22212 4 4 1 1 1 1 40 18
SERVICE ANALYSIS CHART . . . 2221 2 4 4 4 4 LL LL 11 LL 19-22
INSTRUCTION FOR GRID WIRE REPLACEMENT . . . . . . . . . . . .. 23
WATER TREATMENT SERVICE TIPS . . . . . .. .........,. 24
PARTS LIST . 1 221 2444444444 4 0 4 eee ee 25-27
ILLUSTRATED INTERNAL PARTS BREAKDOWN . . . . . . . . . . . . .. 28
ILLUSTRATED EXTERIOR PARTS BREAKDOWN . . . . . . . . . . . . .. 29 _
A.
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SPECIFICATIONS
Inlet water connection - 3/8 SAE male flare. B. Electric connection box.
Bin draín connection - 3/4 F.P.T. D. Inlet water connection - 3/8 FPT
(water cooled condenser). E. Outlet water drain - 3/8 SAE male flare (water
cooled condenser). *Height with 6" stainless steel legs is 44-3/4".
RC-360-SC-1
COMPRESSOR ELECTRICAL RATING . . . . . .. ._ ._ e. ne aaaaaoa oa, 1 H.P.
COMPRESSOR MODEL . . .. . . © © vv oe eee meee ees RSL2-0100-CAA
CONDENSER ... 2111 LL LL LL LL LL LL LL LL LL 10 AIR COOLED
REFRIGERANT CONTROL. . . . . . . . . . . ...... THERMOSTATIC EXPANSION VALVE
INLET WATER SUPPLY FITTING .. 1... 111111111000 3/8" SAE MALE FLARE
VOLTAGE. . . . «vo tt it te LL LL LL LL LS 115 VAC
TOTAL AMPERAGE DRAW. . . . . . © vo vee ee ee ee eee, 30 AMPS
ICE CUTTING GRID (AT 115V) . . . «vv vv ve eeu. . 3.6V 38 AMPS
TXV SUPERHEAT SETTING ........ ee ee ee ee ee ee eee 60
REFRIGERANT CHARGE . . . .. . ... o... .nd0receara 35 0Z. OF R-502
CRANKCASE PRESSURE REGULATING VALVE SET. . . . . . . 50 LBS. MAXIMUM IN HARVEST
(REFER TO SERIAL PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM TIME DELAY FUSE SIZE.)
3
INSTALLATION INSTRUCTIONS
UNPACKING:
1. To uncrate the unit, carefully remove the nails from the bottom of the
Crate skid and lift the crate off of the skid.
2. Tip the unit back so that the top cover rests on the floor, and remove
the four bolts fastening the crate skid to the bottom of the machine, if
auxiliary legs have been purchased, they should be installed at this time.
NOTE: If the cabinet is to be installed flush to the floor, the machine
must be sealed to the floor with an approved mastic such as Sears #3808-0
Caulk, Dow R.T.V. 101, 102 or G. E. 731, 732. This is ап N.S.F. require-
ment. .
3. Set upright and place the unit close to its final location and remove
the tape which holds the bin door from vibrating in shipment. Unit must
be level.
4. If the grid is not installed, open package containing the ice cutting
grid. Check to be sure the grid is the one that the customer wants.
(5/8" wire spacing for cubelets or ] 1/4" spacing for cubes. )
UNIT LOCATION:
1. Allow at least a minimum of six (6) inches at the rear and side of the
ice machine for proper air circulation.
2. This*unit has been designed to be installed in an indoor location which
is clean and which can te adequately ventilated; the air temperature and
incoming water temperature should never exceed 100 degrees nor fall below
50 degrees. (Temperatures above 100 degrees will cut the ice making capacity
below an economical level; temperatures below 50 degrees could cause a
malfunction of the thermostat controls.
3. The unit should be located where air circulation is not restricted. The
unit should not be located near a kitchen grill. Air which contains grease
vapors will deposit grease on the condenser. The condenser should always
be kept clean.
CUTTING GRID INSTALLATION:
Refer to pages 9 & 10.
WATER SUPPLY AMD DRAIN:
J. WATER SUPPLY: Any approved source of drinking water may be used. Water
pressure must be 20-50 lbs. per square inch. If the pressures exceed 50
P.S.1., a pressure regulator will have to be inserted in the water supply
line. Water pressure can be checked by using a pressure gauge of the
proper range and attaching it to the supply line. The unit may operate
in pressures less than 20 PSI, however it may produce cloudy ice. Water
that is excessively hard or has a high iron or mineral content may have
to be treated. Scaling of the freezer plate and cloudy or mushy ice may
be produced if type of water is used without treating. Satisfactory
treatment may be accomplished with the use of a polyphosphate feeder
inserted in the incoming water supply line just prior to entering the
cabinet.
4
INSTALLATION INSTRUCTIONS CONT,
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2. WATER INLET: Pravide a cold water suuply line to the area selected for the
installation of the unit. The incoming water line should have a shut-off
valve provided at a convenient location close to the icemaker. The water
strainer provided with the unit should be installed on the down-stream side
of the shut-off valve. The sunplv line must be adequatelv sized to compensate
for the lengths of the incoming water run. The cuber is equipped with a 3/8"
male flare connection for the incoming water line. NOTE: ALWAYS FLUSH OUT
WATER LINES BEFORE STARTING UNIT.
3. DRAIN: Provide a suitable trapped open drain as close as possible to the
area where the ice cube maker is aoing to be installed. This may be an
existing floor or a 1-1/4" trapped open drain. Connect the drain line to
the rear of the unit and run it with a good fall to the open drain. All
plumbing must be installed according to local codes. The storage bin drains
by gravity, and therefore the drain line must maintain a gradual slope to
an open drain and should be insulated.
For machines using a separate siphon drain, a 5/3" tube connection is
provided and is located about half way up the back of the unit on the left.
NOTE: IN SOME CASES IT MAY BE NECESSARY TO INSULATE THE WATER SUPPLY LINE
AND DRAIN LINE. CONDENSATE DRIPPING TO THE FLOOR CAN CAUSE SERIOUS STAINING
OF CARPETS OR HARDWOODS.
WATER COOLED MODELS:
Water cooled models have a water requlating valve that is factory set to operate
at 120# refrigerant head pressure. This should be checked at the time the unit
is being installed.
Two water inlet connections are provided on water cooled units, one for the ice
making (evaporator) section, the other is for the water cooled condenser. Both
connections are 3/8" male flare fittings. Inlet water to the condenser will go
to the water regulating valve first, then to the condenser coil and out the drain.
The reason for separate water inlet connections is that some installations use
a water tower for cooling the water used in the water cooled condenser and some
installations use treated water for the ice making inlet water.
A separate drain will be required for the outlet of the water cooled condenser.
E. ELECTRICAL REQUIREMENTS:
Provide an external disconnect box near the cabinet. The electric supply
must be 115 volts, 60 cycle, single phase. The icemaker should be properly
grounded, although if the water line is steel or copper, it will automatically
be grounded. If a plastic supply line is utilized a ground wire must be
used. ALL WIRING MUST CONFORM TO NATIONAL AND LOCAL ELECTRICAL CODES.
VOLTAGE MINIMUMS: 115 volt machine - 103 minimum. REFER TO SERIAL PLATE
FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM TIME DELAY FUSE SIZE.
INSTALLATION INSTRUCTIONS CONT,
STARTING THE UNIT:
After the ice cuber has been unpacked and leveled, and all plumbing and
electrical connections have been made, start the unit and check for proper
operation. The cuter has three separate circuits; (A) The water circuit
(8)
1.
The refrigerant circuit (C) The electrical circuit
Start checking the water circuit by making sure that there are no
thread or flare joint leaks, either outside the unit or in the
compressor section. Next check the water flow over the evaporator
and make sure that all holes in the water distributor are open, and
that there is no undue splash or loss of water into the ice bin.
Also check to see if the float valve is functioning properly, and
the correct water level is being maintained at approximately 1/4"
below the top of the siphon stand pipe. This is measured with the
siphon cap removed.
Check the refrigerant circuit by making sure that the condenser fan
is running. (This will be evident by air noise.) If the compressor
running? (Feel the casing for vibration.) Is the evaporator getting
cold? (Look for frost on the evaporator back and on the suction line
in the evaporator section.)
ADJUSTMENT QF WATER PATTERN
All ice machines are factory run and tested prior to crating and shipment. The
water pattern is adjusted at this time and will not normally change in shipment.
When the unit is started upon installation, time must be allowed for the water
pan and hoses to fill with water before proper water pattern will be attained.
Allow the unit to run for a few minutes, inspect the pattern for evenness of flow.
Rub palm of hand in direction of water flow, or use a piece of scotch brite to
smooth pattern across the evaporator, again in the direction of flow. If, after
this procedure has been followed, the water pattern is still not proper, make
adjustment by following the steps explained below.
PROCEDURE OF ADJUSTMENT
(AFTER COMPLIANCE WITH ABOVE INSTRUCTIONS)
The water system is very simple. The adjustment of the pattern should be done
in the foltowing manner: Please note in the accompanying diagram, the location
of the water distributor tube, water cushion, water deflector plate, evaporator
plate and adjustment nuts.
Loosen all adjustment nuts. Position water distributor in center of slotted screw
holes in water deflector, tighten nut enough to allow movement of the ends of the
water distributor. Pivot distributor to position water pattern in center of
evaporator. The pattern will be wider at the top than it is at the bottom. Do
not allow water to stream down the back or top side of the evaporator.
The machine should be as close to level as possible before making this adjustment.
Snug each adjustment nut again, do not over-tighten.
x
Adjustment
Nuts
Clamp Plate
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Water Deflector
at Plate
Water
Distributor
Tube
Evaporator
Plate
Water Cushion
(Clear Plastic Strip)
| _ 7 Adjustment
Water — A Screws
Distributor —
Tube “<— Water Deflector Plate
7
Water Cushion
(Clear Plastic Strip)
7
“Orator p,,
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GRID INSTALLATION INSTRUCTIONS
Attach grid clips (8) to qrid frame as shown using 10/32 x 1/4" machine screws
and lock washers. |
Open bin door.
Connect lead wires from transformer to grid bus bars (D) securing them tightly.
Take ice grid in both hands, guide grid horizontally into bin so that pins (A)
engage into support brackets (C) of the evaporator support.
With grid pins engaged, hold front edge of grid and push upward until spring
clips (B) snap into position. CAUTION: DO NOT HOLD CLIPS WHEN INSTALLING.
INJURY CAN RESULT FROM SHAP ACTION OF SPRING CLIPS.
To remove grid; press in on spring clips and lower grid to horizontal position
pull grid straight out. |
TYPICAL WATER CIRCUIT
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The water circuit consists of a recirculating water pan where a float valve is
located that maintains a constant water level with in-coming water.
A water pump picks up water from this water pan and pumps it up to the water
distributor which flows water on the underside of the evaporator. Excess water
from the evaporator returns to the water pan. (This recirculation of the water
is the feature that assures clear ice.) В
The impurities in the water are rejected in the ice making process and accumulate
in the re-circulated water. For this reason, at the beginning of each harvest
cycle, the recirculated water is dumped out of the water pan by a water siphon,
which is activated by the running water stored on the evaporator face and in the
dams of the water pan.
When the siphon has removed all the water possible, it stops and allows the water
pan to refill.
WATER LEVEL ADJUSTMENT
The float must be adjusted to maintain proper water level after water is turned on.
The proper water level is 1/2" below the top of the siphon cap, which would make
the water level 1/4" below the top of the siphon tube.
9
TYPICAL REFRIGERANT CIRCUIT
Refrigeration is a process of heat removal. In the case of an ice machine, the
heat is removed from water. As the heat is removed, the water drops in temperature
and transforms into a solid state known as ice.
There are three basic sections of a refrigeration system; the evaporator, condenser
and compressor. The compressor moves the refrigerant in the system. As the
refrigerant moves through the system, it enters the evaporator, where it absorbs
heat from the water. |
The refrigerant is a very low temperature liquid and changes to a medium
temperature gas as it absorbs the heat. |
The heat laden refrigerant gas then moves through the compressor into the condenser
where a fan cools the gas there by changing it back into a low temperature liquid.
10
ELECTRICAL CIRCUIT
As the master on-off-clean switch is pushed to “on", a circuit is completed to
the ice cutting grid vía the grid circuit breaker and step down transformer.
Also circuits are completed to the compressor {through the bin thermostat and
high pressure control, W.C.) the timer, the condenser fan and the water pump.
The ice maker is now in operation. . In the clean position, only the water pump
will run.
COMPONENT DESCRIPTION:
ICE CUTTING GRID - The ice cutting grid is supplied with power from the secondary
winding of the step down transformer. It is in the circuit at all times unless
the master switch is off. The warm wires cut the slab of ice into cubes.
STEP DOWN TRANSFORMER - The transformer is used to reduce the incoming line
voltage (115 volts) to approximately 3 or 4 volts.
GRID CIRCUIT BREAKER - Protects the step down transformer. It is electrically
In series with the primary winding (2.0 amp).
BIN THERMOSTAT - The bin thermostat contains a N.C. contact. As ice reaches its
capillary the contact opens, breaking the circuit to all components other than
the ice cutting grid.
HIGH PRESSURE CONTROL - (Water cooled only) The high pressure control 15
electrically in series with the compressor and contains a N.C. contact. As
discharge pressures rise the contact opens, terminating power to the compressor.
As the pressure reduces the contact closes and the compressor starts.
COMPRESSOR START RELAY - This is a current type relay and contains a N.O. contact
which ls connected in series with the start winding of the compressor. The relay
coil is electrically in series with the run winding. When power is applied, the
compressor draws high current which sets up a magnetic field around the magnet
coil which causes the relay to operate, closing the relay contact. As the compressor
approaches operating speed the current flowing through the coil decreases,
permitting the relay contact to open, thereby opening the starting circuit.
START CAPACITOR - This capacitor is electrically in series with the start winding.
It 1s designed for intermittent service only. The voltage across the start
capacitor is higher than line voltage because of the generating effect of the start
winding. It is used to provide a phase shift for the start winding.
HARVEST THERMOSTAT - The harvest thermostat is a thermally controlled single
pole, double throw switch with a differential range of 15 degrees. It works with
the solid state timer to terminate the harvest cycle.
HOT GAS SOLENOID - The hog gas solenoid is controlled by the solid state timer and
{s energized at the proper time for defrost.
TIMER - The timer is a solid state device that determines the length of the
freezing cycle, and at the end of that freezing cycle, puts the machine into a
harvest or defrost cycle. It also terminates power to the water pump approximately
15 seconds after the harvest or defrost cycle has been initiated.
LOW AMBIENT FAN CONTROL: This control switch will break the circuit to the
condenser fan motor at MB8 PSI and make the circuit at WB PSI,
170 230
11
HOW IT OPERATES
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(LOW VOLTAGE 12 V OC)
Our ice machine is very simple and reliable, however, like any piece of mechanical
equipment, its operation must be completely understood before competent service
can be performed. Please read the following carefully.
1. The ice cutting grid is continuously energized at all times, even during
the off cycle. (except for models using grid thermostats)
2. The compressor and solid state timer operate continuously, even through
defrost, EXCEPT when the bin is full of ice and the cubes touch the bin
thermostat bulb. Power is then terminated to everything but the grid.
3. The solid state timer controls all four cycle functions:
a. Determines length of "freeze time."
b. Keeps water pump operating for short time into defrost cycle.
. €. Determines maximum length of defrost cycle.
d. Provides cycle completion upon start-up.
NORMAL FREEZE CYCLE - A normal freeze cycle begins when the master switch 1s on
and the bin thermostat is in the closed (warm) position thus allowing all
components to operate including the solid state timer. The condenser fan may lag
somewhat until sufficient head pressure is built up. The “low ambient” fan switch
controls this (only on machines utilizing this control). The compressor and water. .
pump are both running. The hot gas solenoid valve is closed or de-energized. The —
machine is now freezing the water and making ice.
12
HOW IT OPERATES CONT'D
IMPORTANT: The ice slab thickness is basically determined by the length of time
the machine is allowed to operate at the above conditions (compressor and water
pump running, hot gas valve CLOSED.)
The length of this "freeze time" 1s solely determined by the solid state timer.
There are NO mechanical sensors, low pressure controls, thermostats etc., that
regulate {ce thickness, only the timer. The “freeze time" function of the timer
is adjustable for two reasons:
1. Customer may want to vary ice cube thickness.
2. Complete inter-changeability between all cubers. One timer will operate
all models.
(To adjust timer for desired ice thickness, refer to "ADJUSTMENT" section.)
As the freeze cycle continues, the ice slab increases in thickness until timer
"times out" and then initiates the defrost cycle (harvest).
NORMAL DEFROST CYCLE - Once the ice slab is formed, it must be released from the
evaporator plate. This is accomplished using the hot gas defrost method. When
the timer completes the freeze cycle, it starts the defrost cycle by opening the
hot gas solenoid valve via one of the relays on the timer circuit board. At this
time the condenser fan will shut off. The water pump will continue to run, but
only for an additional 10 to 20 seconds. The timer will then shut the pump off
as the defrost cycle continues. The pump "off delay" is necessary to prevent
thermo-shock to the ice slab as the hot discharge gas from the compressor enters
the evaporator. Thermo-shock can cause severe fracturing of the slab into many
pieces. The defrost continues until the evaporator reaches approximately 40
degrees F. or until 4 to 5 minutes have elapsed, whichever occurs first.
Generally the evaporator reaches 45 degrees F. within 1 to 2 minutes, and when
the harvest thermostat (attached to the suction line) senses that temperature,
it responds by sending a signal back to the timer which terminates the defrost
cycle. In the unlikely event that the thermostat would fail to send the signal
back to the timer, the timer itself will automatically terminate the defrost
cycle without the thermostat, after four to five minutes have elapsed. However,
as you can see, it is beneficial to ice production if a thermostat is used,
which keeps the defrost cycle to a minimum time and in turn allows more freeze
cycles per day. A manual "harvest" or defrost switch is provided on the timer
board to allow the serviceman to prematurely put the machine into the defrost
condition during a normal freeze cycle. The evaporator however must be 25 degrees
F or colder before the manual defrost switch becomes active. This prevents
overloading of the compressor due to repeated manual defrosts.
CYCLE COMPLETION - As the bin fills and the ice touches the thermowell tube,
the bin thermostat "opens" and terminates power to the machine (except the
grid): Since this will probably occur during a freeze cycle the evaporator
will undoubtedly have a partial slab of ice formed on it at the time of shutdown.
This could cause a water flow problem at the start-up of the next freeze cycle
if it were still there. Short off-cycles are not: uncommon due to the customer
taking ice from the bin shortly after shut-down by the bin thermostat. To
make sure the evaporator is clear of ice before a new freeze cycle begins, the
timer, upon start-up "checks”the evaporator temperature via the harvest thermostat
and if it's 30 degrees F. or colder (thus indicating a high probability of ice
<*ill on the plate), the timer will proceed with a defrost cycle first before
the normal freeze cycle. This will remove any ice still on the plate.
13
If, upon start-up, the evaporator is 45 degrees F. or warmer, thus indicating
the absence of ice, the timer will proceed with a normal freeze cycle. Thus,
the prior freeze cycle is “completed” so to speak in that the ice is removed
from the evaporator plate before another freezing cycle occurs.
ADJUSTMENT OF TIMER FOR ICE THICKNESS
The solid state timer is quite easy to adjust for any ice thickness. However,
a wristwatch is necessary to set the pulse rate or timing function.
The ice slab thickness is relative to the length of time that the unit is allowed
to stay in the freeze cycle. (timer detemines this) The timer freeze cycle
length is adjustable from approximately five minutes to 110 minutes. Please
adjust carefully. Turning the potentiometer slightly will change ice thickness
drastically.
PROCEDURE
Step 1: Turn ice machine on and watch for slowly blinking light located dn
timer circuit board. This is the pulse indicator. Refer to sketch.
(Does not blink if in defrost.)
Step 2: Use wristwatch to determine number of seconds that pulse indicator is
11% during each blink. Adjust if necessary to obtain desired ice
thickness. Check time carefully. Refer to "Recommended Timer Settings”
chart, under appropriate ice machine model, select ice thickness
desired. Then move straight across to far left column showing pulse
indicator. "on" time. (seconds) Adjust potentiometer until red light
stays on for required number of seconds indicated on chart.
RECOMMENDED TIMER SETTINGS
”
Pulse Freeze Approximate
"ON" Cycle Ice Thickness
Time Time 302, 320-602 | 30%. 140,400
152 ? ’ 9
150 902, 1202 306, 603 360 __
4 sec. 17 min. -- | ------ 1/4
5 sec. 22 min. -- 1/4 1/2
7 sec. 30 min. 1/4 1/2 3/4
11 sec. 47 min. 1/2 3/4 | ------
14 sec. 60 min. 3/4 === | eee
IMPORTANT: Be as accurate as possible when setting pulse time. Also, ambient aftr —
and Incoming water temperature will affect ice thickness.
14
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15
REMOVAL NNF SOLID STATE TIMER FROM MACHIT
“ CAUTION *
The circuit board on which the solid state components are mounted is fragile.
Handle With Care. |
=, 7
PROCEDURE OF REMOVAL
Turn machine off.
Remove electrical box cover panel.
Disconnect all wires from terminals on timer circuit board. (Label if
necessary. ) -
4. Carefully, lift any corner of the circuit board, while at the same time
pinching closed the top part of the plastic "stand-off" support with needle
nose pliers. The "board" has to be gradually worked up over all seven of
the plastic "stand-off" supports. It will not “pop off" until all supports
have been pinched closed and the board is holding them in that position.
This takes a little practice. Please be careful.
©) РО) —
T0 RE-INSTALL TIMER BOARD
Align board holes (7) over all plastic stand-offs.
Carefully push downward until board "seats" on all supports. Sometimes a
"snap" will be heard as each plastic supnort "locks" to the board. —
Be sure circuit board is seated and locked at all seven locations.
- Connect wires to terminals.
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16
SANITIZING AND CLEANING PROCEDURE
1. Turn switch to "OFF" to stop unit.
2. (a) Turn water off and remove water hose from float chamber and proceed to
drain the float chamber and evaporator; or
(b) Remove float chamber cover and while holding float up to prevent more
water from entering the float chamber, remove water hose from float chamber
and proceed to drain the float chamber and evaporator.
3. With the float still held closed or water stil) off, restore water hose to
float chamber and add 1/4 oz. of “sanitizer” (see note below) to the float
chamber. Release float arm so that chamber fills with water. Turn water on,
if necessary.
4. Turn switch to "ON" position and make ice for a minimum of 10 minutes.
5. Remove all ice from bin.
6. During the period in which the ice is being made, mix up the “sanitizer”
for the bin and use as follows:
To a gallon of lukewarm water, add 1/2 oz. vsanitizer® and with a non-metallic
bristle brush, scrub the interior of the ice bin including the under side of
the door, and the outside of the ice chute that protrudes into the ice bin.
7. Rinse interior of bin with clean water. (NOTE: Steps 6 and 7 should take no
less than 10 minutes.)
8. Not less than 10 minutes after completing step #4, turn switch to "OFF" and
repeat step #2. After the evaporator and float chamber have drained, restore
hose to float chamber, release float, replace float cover and turn water on
if necessary.
9. Turn switch to "ON*. Collect and throw away the first gallon of ice.
NOTE: APPROVED SANITIZERS ARE: 1) DuBOISE CHEMICALS - “IODET"
2) DIVERSEY CORP. - "UDDER-BAC"
WATER TREATMENT
During the freezing process, as water passes under the freezing plate, the
impurities in the water have a tendency to be rejected and the plate will freeze
only the pure water.
However, the more dissolved solids in the water, the more troublesome the freezing
operation will be. Bicarbonates in the water are the most troublesome of the
impurities. These impurities will cause scaling on the evaporator, clogging of
the water distributor head, float valve mechanism and other parts in the water
system. If the concentration of impurities is high, cloudy cubes or mushy ice
may be the result. |
Parts of the ice maker, that are in contact with the water or ice, may corrode 1f
the water 1s high ín acidity. In some areas, water may have to be treated in
order to overcome some of the problems that arise because of the mineral content.
One of the most economical and successful ways of doing this is whey a
polyphosphate feeder which is inserted in the water inlet to the ice cube maker.
These feeders correct problems caused by dissolved iron, preventing {ron stains
and deposits. It also prevents liming and scaling. These feeders must be
installed according to the manufacturer's recommendations in order to satisfactorily 17
rea В water + -
WINTER STORAGE
If the unit is to be stored in an area where the temperature will drop below wy.
freezing, it is most important that all water lines be drained to prevent them
from freezing and possible rupture.
To blow out the water line, disconnect the water supply at the cabinet inlet and
use air pressure to force the water into the water reservoir pan. This can then
be removed from the water pan.
WATER COOLED CONDENSER - To remove water from condenser unhook water supply and
attach compressed air hose. Start machine. As head pressure reaches the
appropriate level opening the water regulating valve, the compressed air will
force the water out. Do not let the machine operate longer than necessary.
CLEANING THE CONDENSER (AIR COOLED)
In order to produce at full capacity, the refrigeration condenser must be kept
clean. The frequency of cleaning will be determined by surrounding condition.
A good maintenance plan calls for an inspection at least every two months.
Remove the unit compartment grille at the front. With a vacuum cleaner, remove
all accumulated dust and lint that has adhered to the finned condenser.
CAUTION: CONDENSER COOLING FINS ARE SHARP. USE CARE WHEN CLEANING.
18
SYMPTOM
Evaporator plate does not
build up ice.
2. Ice slab will not release
during defrost period.
SERVICE ANALYSIS
POSSIBLE CAUSE
Defrost solenmd valve stuck open.
——
Refrigeration system inoperative.
Timer control inoperative.
Water pump failure.
No water circulating.
Float valve stuck closed.
Water supply or power failure.
Timer control inoperative.
CORRECTION
Tap valve with a wrench to make seat
drop. If evaporator then starts to build
up ice, the defrost valve should be
changed.
Diagnose and repair.
Check and replace.
[f evaporator plate freezes but pump is
not running, repair or replace the pump.
Check for clogging at water inlet
strainer, float valve, or water distributor.
Remove and clean.
Check and correct.
Check wiring and replace if necessary.
Defrost solenoid valve fails to open.
Harvest Control has not re-set.
Mineral build-up.
Coil may be open, check and replace.
Adjust warmer or replace if necessary.
See section on “Water Treatment”.
(Maintenance)
3. Uneven ice slab build-up
on evaporator.
Pump not supplying sufficient water
through the distributor.
Low water level in reservoir.
Possible expansion valve problem.
(Units using TXV)
Low charge, moisture in system, or
possible restriction.
Clean distributor.
Clean and/or adjust float valve.
Check superheat (6° F.) adjust or replace
valve if necessary.
Find cause of leak or restriction. Repair, re-
place drier, evacuate and recharge properly.
4. Cloudy ice cubes.
Excessive mineral: in water.
Syphon does not remove water
from water pan during defrost
cycle.
Insufficient or restricted water
supply.
See section of manual on “Water
Treatment”.
Unit operating with water level too low.
Check strainer on water inlet if on unit.
Check float valve orifice and clean if
Necessary.
dr a daa Md de wba FL mn e ba um Mena AE
19
dl alada Da *
= = | сны с
5. Slow slab release.
6. Improper or no ice
cutting.
E a=W Mme nm ewe mmm ee =e mem
SERVICE ANALYSIS CONT,
POSSIBLE CAUSE
Low ambient temperatures pro-
duce low head pressure. Slow
slab release possibly will occur
if head pressure drops below
100 lbs.
он ные сео = — — щен т с = |)
Mineral build-up on freezer plate
Transformer failure.
Gnd fuse blown.
Gnd circuit breaker.
CORRECTION
Operate in higher ambient temperature.
E
See section of manual on “Water Treatmer
———
Check and replace.
Check and replace.
Check and replace.
Faulty wiring. Check wiring diagram.
7. Water runs into bin Ice failed to release in harvest See #2 above.
off of evaporator. cycle.
Insufficient water in water pan. Restricted orifice in float valve.
Water pump failure. Low water pressure. Float stuck.
8. Poor capacity.
Mineral build-up in water distribu-
tor.
Float valve stuck open causing
water to fill reservoir pan and
overflow in bin.
See section on maintenance. >
Make sure float does not rub side of reserve
pan or pump.
Mineral build-up.
Defrost solenoid not completely
seating.
High room ambient.
See section on “Water Treatment"
Rap valve body lightly. If pressures retum t
normal then replacement should be made.
Normal to lose capacity.
Restricted air flow. Clean condenser and make sure fan is
operating.
Compressor may be cutting out Check compressor components.
on overload.
Eo
9.Slow cutting of ice
slab through grid
Low voltage and amp draw
Excessive number of broken
grid wires
Ice slab hang up on frame or
insulators
Grid not positioned under
evaporator correctly.
20
Check items
Replace x
Bend grid support brackets ns
toward water pan to position
grid under evaporator
correctly.
SERVICE ANALYSIS CON |
TROUBLE SHOOTING THE SOLID STATE TIMER
"DOES IT WORK PROPERLY?"
SOLID STATE ELECTRONICS ARE VERY RELIABLE. PLEASE BE SURE TIMER IS AT FAULT
BEFORE REPLACING OR RETURNING IT UNDER WARRANTY.
THE TIMER IS NOT FIELD REPAIRABLE.
PROCEDURE FOR COMPLETE CHECK-OUT
FIRST - With machine ON, check for voltage to the circuit board by placing volt-
meter leads on an Li terminal and a neutral terminal. There must be a minimum
of 103 volts for proper timer operation. If voltage is there but timer still
appears to be faulty, proceed to Step 1.
1. Turn machine off.
2. Disconnect three wires from harvest thermostat terminals red, lbue and black
located near defrost switch.
*3. Disconnect wires from “pump","“valve", and "fan" terminals on board. Insulate
loose ends of pump and valve wires only with tape.
*4. Re-connect fan wires to an Ly terminal. This will allow the condenser fan
to operate with the compressor when the machine is turned on again for timer
"check-out" in step 6. Do not forget to return this wire to the fan
terminal when ‘check-out is completed.
5. Connect voltmeter (115 volt scale) between "pump" terminal and neutral. See
timer sketch for terminal location.
6. Turn machine on. These things should happen:
a. Compressor and condenser fan should run.
b. Voltmeter should indicate 115 volts for 10 to 20 seconds and then drop
to 0 volts.
c. Pulse indicator light should be lit, but not blinking.
*On units where condenser fan is connected to solid state circuit board fan terminal.
7. Remove voltmeter lead from "pump" terminal and connect to "valve" terminal.
Voltmeter should indicate 115 volts. This indicates that the hot gas valve
relay is functioning. This terminal will remain "hot" throughout the defrost
cycle. (approximately 4-5 minutes)
8. Remove voltmeter lead from "valve" terminal and connect to "fan" terminal.
Voltmeter should indicate O volts. Fan is normally OFF during defrost.
9. Wait for timer to complete defrost cycle. Pulse indicator will again blink
slowly when timer enters freeze cycle, thus indicating end of defrost.
21
* 10.
11.
12.
13.
14.
SERVICE ANALYSIS CON T.
Now, check voltmeter again. "Fan" terminal should be at 115 volts.
Connect voltmeter lead back to "pump" terminal. Should be at 115 volts. sr
Connect voltmeter lead to "valve" terminal. Should be at 115 volts.
Timer is essentially in the FREEZE cycle now.
To check manual defrost function, push "DEFROST" switch. Timer should "act"
just as it did when power was first applied at Step 6.
Timer can also be checked out by leaving the harvest thermostat wires
disconnected and allowing the machine to continue operation. (Harvest cycle
will be somewhat longer, 4-5 minutes.) Ice production should continue
normally if timer is okay.
NOTE: If ANY of the above functions do not occur in the sequence described,
timer is FAULTY. Replace.
TROUBLE SHOOTING THE HARVEST THERMOSTAT
A defective harvest thermostat will cause harvest malfunctions. First, disconnect
thermostat wires from timer - red, blue and black.
1.
Connect ohmmeter (Rx1 scale) between black and red wires. If thermostat
temperature is 45 degrees F or higher, continuity should exist. If not, Е
thermostat is defective. NS
Connect ohmmeter between black and blue wires. If thermostat temperature is
30 degrees F or colder, continuity should exist. If not, thermostat is
defective.
22
INSTRUCTION ON GRID WIRE REPLACEMENT
FRAME _ INSULATION STRIP
NYLON TIE ROD ASS o Ln 4. € ©
NN ® /
INSULATING BUSHING —
WIRE
ye 8USS BAR
— WIRE TENSION ADJUSTING
SCREW - 4 PLACES
TERMINATION PINS
Remove grid from ice cuber. (see grid instaiiation and removel instructions)
Loosen grid wire tension by removing or loosening the four (4) wire tension
adjusting screws, on one side.
NOTE: All wires whether for large cube or cubelets are identical in length.
The wires for the large cubes are 21 gauge or .025 inches in diameter. The
wires for the cubelets are 23 gauge or .020 inches in diameter.
Every grid wire starts at one bus bar and runs dfagonally around a nylon tie
rod on either the left or right side, and from there goes diagonally to the
opposite side bus bar. :
Unsolder wire eyelet and lift off of terminal. Do same on opposite buss bar.
NOTE: Electrically every grid wire is in parallel with every other grid wires
This is similar to a strong of Christmas tree lights, where is one light fails
it does not affect the rest of the string. |
Put new wire through appropriate opening in buss bar and weave through going
underneath the first wire, over the second, under the third, etc., to nylon
tie rod.
Loop around nylon tie rod and proceed with same weave pattern to opposite
buss bar.
Secure both ends of wire to respective terminal pins.
Adjust grid tension by tightening wire adjusting screws.
Re-solder wire to buss bar terminals using 'Stay Brite’ solder and “Stay
Clean flux. Use soldering gun or iron.
23
Automatic ice-making machines can quit working for any number of reasons,
WATER TREATMENT SERVICE TIPS
STEPS TO IMPROVE ICE MACHINE PERFORMANCE
4 #
=
ди
mechanical, electrical or faulty refrigeration-but water problems foul them up
faster than almost anything else. While ice machines vary in design, you can apply
these water treatment tips to all of them.
1.
START WITH THE WATER
The mineral content of water varies in different areas and as the chart
shows, high hardness and alkalinity counts combine to form insoluble calcium
carbonate or lime scale. If this condition is constant, the intake water
must be treated constantly to prevent scale formation in the ice machine.
CLEAN THE MACHINE
Before starting the water treatment, clean the water distributor holes in the
ice machine and flush all sediment from the system. Refill sump with hot
water. Add liquid ice machine cleaner to sump. Allow water to circulate for
30 minutes. Drain and flush system with fresh water. (Repeat dosage if
scale deposits are extremely heavy.) Check all lines for blockage by loosened
scale.
PREVENT LIME SCALE FORMATION
We recommend the installation of a Calgon Microment Feeder on the incoming
water line. No. X-8B Feeder is recommended for ice machines with a capacity
of 400-450 1bs. per day. Fill the feeder with 6R Micromet, the slowly o
soluble poly-phosphate which lasts six months before renewing the 8-0z. charge. ad
Constant treatment with 6R Micromet will control lime scale and prevent
minerals from sticking to the freezing surfaces in ice machines. Result:
smooth movement of ice slabs; good harvest of ice cubes; efficient, automatic
production.
REMOVE OBJECTIONABLE TASTE OR ODOR
If the bad taste or odor is traceable to the water source, install a Calgon
Fine Carbon Filter to the incoming water line. The No. 1 1/2B Fine Carbon
Filter is ideal for machines making up to 500 pounds of ice per day and will
remove bad taste, odors, and problems caused by chlorine in the water supply.
In some instances, slime growths may cause odor problems and these growths
can be removed by the use of liquid ice machine cleaner.
SERVICE REGULARLY
A service program to clean the ice machine at regular intervals and check on
filter and feeder charges is important. In the long run, it will assure
adequate water treatment, reduce emergency calls, and aid in the trouble-
free performance of automatic ice making machines.
24
ROSS-TEMP
PART NO.
т 2 3836
35649
9570
21850
29797
21924
37913
25268
25334
25335
25446
28884
25242
26068
RC-360-5C
(115 60cy 1 ph)
DESCRIPTION
Switch, on-off-clean
Fan blade
Bin thermostat
"Drier
Water pump
Float and valve
Transformer
Compressor
Comp. start relay
Comp. start capacitor
Condenser
Capacitor, comp. run
Fan motor
Overload, compressor
VENDOR ADDRESS
McGill Mfg. Co.
Valparaiso, IN 46383
Brookside Corp.
McCordsville, IN 46055
Ranco Inc.
8115 US 42
Plain City, OH 43064
Sporlan Valve Co.
7525 Sussex
St. Louis, MO 63143
Milton Roy Co.
Hartell Division
26 Richard Road
Ivyland, PA 18974
Robert Mfg. Co.
10667 Jersey Blvd.
Cucamonga, CA 91730
Johnson Elec. Coil
821 Watson
Antigo, WI 54409
Copeland Corp.
Sidney, OH
Copeland Corp.
Sidney, OH
Copeland Corp.
Sidney, OH
Wilmington Coil Division
602 Sunnyvale Ave.
Wilmington, NC 28402
Sprague Electric
‘87 Marshall St.
N. Adams, MA
Electric Motor Speciality
King & Hamsher Sts.
Garrett, IN 46738
Copeland Corp.
Sidney, OH
25
(PURCHASED PARTS ONLY)
VENDOR
PART NO.
0811-0311
OP6-S-15520
A-30-1789-00
CG-052
ARC-1B
RM-292-1A
J-10175
RSL2-0100-CAA
040-0001-20
014-0008-61
12V-9 1/2-14
325P306X637
ON46NAX
ESP-L35-EMI
071-0127-30
ROSS-TEMP
PART NO.
28240
28239
29798
23839
25531
27012
28023
28024
36701
36700
DESCRIPTION
Harvest thermostat
Clip, harvest therm.
Thermostatic
expansion valve
Power relay
High pressure control
Fan control
(low ambient)
Hot gas valve
(body only)
Hot gas valve
(coil only)
Holder, grid fuse
Cartridge, grid fuse
VENDOR ADDRESS
Essex Controls
P.0. Box 967
Mansfield, OH 44901
Essex Controls
P.0. Box 967
Mansfield, OH 4490]
Alco Controls
Emerson Elec. Co.
Box 12700
St. Louis, MO 63141
Essex Group
131 Godfrey St.
Logansport, IN 46947
Johnson Controls Inc.
P.0. Box 486
Oak Brook, IL 60521
Johnson Controls Inc.
P.0. Box 486
Oak Brook, IL 60521
Ranco Inc.
601 W. 5th Ave.
Columbus, OH 43201
Ranco Inc.
601 W. 5th Ave.
Columbus, OH 4320]
Wesco
P.O. Box 1797
Waterloo, IA 50704
Wesco
P.O. Box 1797
Waterloo, IA 50704
26
PART NO. …
VENDOR
416-91
408- 30-5023
AN 1/4 RC
6A8050TS
RBM #75
2403010
10510
P20 CA135
Style 34
P20AA-35
VF4-9100-00
L16-701
Buss HPF
Buss FIM 1.6
PARTS LIST
PART NUMBER
(RC-360-SC-1 115V.)
O ONU ÓN
Bin thermostat 9570
Campressor start capacitor 25335
Compressor run capacitor 28884
Grid circuit breaker N/A
Switch, on-off-clean 23836
Harvest thermostat 28240
Clip, thermostat mounting 28239
Relay, compressor start 25334
Control, low ambient fan 27012
Timer, solid state 28185
Valve body only, hot gas 28023
Bracket, float mounting N/A
Control, high pressure (water cooled) N/A
Condenser (air cooled) 25446
Condenser shroud 29802
Condenser coil (water cooled) N/A
Motor, condenser fan (air cooled) 25242
Blade, condenser fan 35649
Siphon cap 22315
Valve, water regulating N/A
Drier 21850
Compressor 25268
Coil only, hot gas 28024
Reservoir, water 21944
Vlave, float 21924
Siphon tube | 22429
Suction line assembly (air cooled) 35677
Bracket, evaporator support (lower) 21393
Plate, water drain 21941
Evaporator 22003
Cushion, water 29760
Bracket, evaporator support (upper) 21972
Deflector, water plate 29761
Distributor, water 29763
End cap, water distributor 22279
Plate, clam (water cushion) 29759
Pump, water 29797
Transformer, grid 37913
Grid, ice cutting 37946
Wire, grid 22111
Clip, grid 22129
Screw, grid clip mounting 9787
Valve, thermostatic expansion 29798
Protector, campressor overload 26068
Ice cushion kit 22368
Plastic loop only 22367
Power relay 23839
Holder, grid fuse 36701
Cartridge, fuse 36700
27
RC-320 |LLUSTRATED INTERNAL PARTS BREAKDOWN
RC-340 RC-360
a 9
, / q | ;
o
AUS 7
X -
— -
”
<
ILLUSTRATED EXTERIOR PARTS BREAKDOWN
RC-320 RC-360 RC-340
24151 UPPER FRONT ACCESS PANEL
24162 ISTAINLESS).,, CL.
24163 UPPER RIGHT SIDE LOUVERED PANEL
24154 (STAINLESS)
229590 TOP COVER ASSY.
29591 (STAINLESS)
21320 BIN DOOR |
E
Ne /
= A
fa 24037 | LH HINGS
A |
21342 CLIP
| . ; |
pa
"24163 LOWER RIGHT SIDE LOUVERED PANEL
24164 (STAINLESS)
24034 BIN DOOR | \ Ди 21342 CLIP
213¢0 AH HINGE
21986 HINGE LEAF - EiN DOOR
24148 LOWER TRONT LOUVERED PANEL
24147 (STAINLESS) —
29
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