Scotsman CME306 Installation guide

Technical Training
Technical Training
CME306 and
CME456

What
What’ ’s In The Program s In The Program
•Introduction to the Product
•Installation & Application
•How it Works
•Service Diagnosis

Introduction
Introduction
•CME306 and CME456
– Modular Cubers
•115/60/1
•230/50/1
– 22 Inch Wide Platform
– Air Cooled has Cleanable Air
Filter in Left Side Panel
–CM
3Technology
•AutoIQ Controller
•Adaptive Harvest
•Insulated Freezing Compartment

CME306
CME306
•Similar to the CME256 System
– Single Evaporator
– Air Cooled
•One Fan
•Major Differences:
– Smaller Cabinet - 22” wide x 28” high x 24” deep
– Purge Valve Reservoir Drain System
– Smaller Fan Motor & Blade
– Compressor (RS43C2E)

CME456
CME456
•Similar to CME506 System
– Two evaporators
•Major Differences
– Smaller Cabinet - same as CME306
–PurgeValve
– Has 2 TXVs and 2 Check Valves
•One for each evaporator
– Compressor (RS55C2E)
– Air Cooled
•Two fan motors and blades

Common Parts
Common Parts
•Inlet Water Valve
– Same as on SCE275 through CME806
•Fan Motors
– CME306, CME456 same as SCE275
•TXVs
– CME306, CME456 same as CME256
•Water Pump
– CME306 same as CME256
•Same PTCR
Benefit:LowerPartsInventory

Applications
Applications
•On Modular Bin
– BH375 or SLB375
– BH260 or SLB260 w/new mounting bracket
– HTB555 or HTB350 with KBT27
•On Motel Dispenser
– HD150
– SD150 with KDT22 kit
•On Ice and Beverage Dispensers
– Scotsman & Booth
– Lancer & Others
Benefit:WideRangeof
Applications

Installation
Installation
•Air Cooled
– Air flows in the left side
and out the back.
– All ship with air baffle for
tight corner installations
•Designed to prevent air
recirculation from the
condenser outlet to the
air inlet
Install Vent on
Reservoir Drain
Baffle

Optional Bin Thermostat Kit
Optional Bin Thermostat Kit
•Normal Ice Level
Control is the Ice
Sensor System
– Fills Bin Very Full
– Bins Without
Baffles May
Overfill
•Add the Optional
Thermostat Kit -
KSTAT-22

Component Location: Front View
Component Location: Front View
Hi Voltage Box
Refrigeration System
Access Valves
Water Pump
Controller
Evaporator
Cover
Water Level
Sensor
Reservoir

Component Location: CME306
Component Location: CME306
Internally Equalized
Thermostatic
Expansion Valve
16 Watt Fan Motor
1.25 GPM Inlet
Water Valve

Component Location: CME456
Component Location: CME456
Two 16 Watt
Fan Motors
Two Internally
Equalized TXVs and
Two Check Valves

Under the Evaporator Cover
Under the Evaporator Cover
Upper Splash
Panel
Lower Splash
Panel
Evaporator
Bracket

Under the Splash Panels
Under the Splash Panels
CME306
with
Upper and
Lower
Splash
Panels
Removed
CME456
with
Upper
Splash
Panel
Removed

CME456
CME456
Water Trough
- CME456
Only
Right
Evaporator
- CME456
Only
Cascading Shield -
CME456 Only Cube Deflector
Front
Ice
Sensor
Mount

Lower Splash Panel Position
Lower Splash Panel Position
Lower Splash
Panel Flange
Must Be As
Shown -
Behind
Molded
Bump
Molded
Bump

PTCR
PTCR
PTCR
Purge Valve
Timer &
Relay
It’s Hot!

PTCR
PTCR
•Positive Temperature Coefficient Resistor
– Replaces Start Relay
– Eliminates Start Capacitor
– In Series with the Compressor Start Winding
– Flows Full Current at Lower Temperature
– Blocks Current Flow at Higher Temperature
– Changes Temperature with Current Flow
•Normal Operating Temperature is 180oF.
– Must Cool Down to be able to Restart Compressor
•About 4 - 5 minutes of Off time

CME456 Refrigeration Schemati
c
CME456 Refrigeration Schematic
Evaporator
Evaporator
Discharge Line
TXV Bulb
TXV Bulb
TXV HGV
Check
Valve
Check
Valve
Liquid Line
Suction Line
TXV
Condenser
Compressor

CME456 Refrigeration Syste
m
CME456 Refrigeration Syste
m
•Two TXVs Eliminates Distributor
– Both Internally Equalized
•Eliminates Low Side Connection
– Check Valves Prevent Cross-Feeding During Freeze
– If a TXV Bulb is on the Wrong Evaporator Outlet
•One Evaporator Does Not Make Ice
•Why?