Ice-O-Matic GEM0655 Air Refrigeration Service, Instructions for Liquid Charging R404A, Page

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Refrigeration Service:
Low Side High Side
R404A Tank Must Be in Liquid Dispensing Position.
Check Tank!
Hose Connection Schematic for Liquid Charging
Torque Stem to 6-8ft.-lb. Torque caps to 7-12ft.-lbs

GEM0650/0956/1256 A/W Instructions for Liquid Charging R404A: Refrigeration System Service

Refrigeration Service:

General: This ice machine uses R404A refrigerant and polyolester oil. Do NOT use mineral oil in this refrigeration system.

●When the refrigeration system is serviced, a special liquid line drier is required. It is included with replacement compressor.

●R404A is not compatible with mineral oil so these ice machines use Polyolester oil. Polyolester oil absorbs water very easily. A system opened for service must be re-sealed as soon as possible (15 minutes maximum).

●Special leak detection equipment is required to locate small refrigerant leaks. Usually a leak detector capable of detecting Halongenated refrigerant or HFC-134a will work. Check with the leak detector manufacturer if in doubt.

●Evacuate to 300 microns. ●Liquid charge the system.

Access Valves: To use the access valves:

●Remove the cap from the stem, use a 3/16 inch Allen wrench to check that the valve is CLOSED. Then remove the core cap.

●Close the valve and replace the caps when done. The valve must be closed and the caps tightened.

Instructions for Liquid Charging R404A:

In preparation for charging, the low side hose should have a sight glass, and/or a restricting device (such as a “Charge Faster”) installed in it for metering liquid into the low side of the system.

1.After a through evacuation shut off the manifold valves and switch off the vacuum pump.

2.Place a drum of R404A onto an electronic scale.

3.Attach the charging hose to the drum.

4.Open the valve on the drum and purge the charging hose.

5.Zero out the scale.

6.Shut the low side access valve at the ice machine.

7. Open the discharge manifold valve full open.

8.Watch the scale, when the correct charge is shown, shut the manifold valve.

Note: If all of the charge will not “go in” the discharge side:

a. Shut the discharge access valve at the ice machine.

b. Switch the machine on.

c. Open the low side access valve at the ice machine.

d. Open the low side manifold valve and observe the sight glass to be certain that only gas is flowing into the system.

e. When the proper charge is indicated on the scale, shut off the manifold valves.

9.Shut off the valve on the refrigerant drum.

10.Re-open the manifold valves until all liquid has flowed out of the hoses.

11.Shut the low side access valve on the ice

machine.

12. Remove hoses from ice machine and replace all caps.

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Contents GEM0655 Air SERVICE AND INSTALLATION MANUALGEM0650A/W,GEM0956A/W and GEM1256A/W Page Keep this manual for future reference GEM0650/0956/1256 A/WForward PageTable Of Contents Table of ContentsVisible Loss or Damage Freight Claim ProcedureInspect Promptly Concealed Loss or DamageLimitation of Warranty WarrantyICE-O-Matic Filing a ClaimElectrical Specifications For the InstallerInstallation Guidelines AdjustmentsFor The Installer GEM0650/0655/0956A/WGEM1256A/W Ice Machine Specifications Bin ApplicationIce machine LocationStorage Bin Water LimitationsGEM 0650/0956/1256 A/W WATER COOLED MODELS For the PlumberWater Inlet AIR COOLED MODELSWater Cooled Models For the ElectricianElectrical Connections Air Cooled ModelsGEM0650/0956/1256A/W Final Check ListStart Up Start UpPre-StartInspection Component Description Air Cooled Model ShownGEM0650/0956/1256 A/W Component Description Ice Sweep Bearing Breaker/Divider Auger Evaporator Motor Water SealElectrical Sequence To ResetElectrical Sequence Shut DownOperation Water Water SystemOperation: Performance High Pressure Cut Out- Automatic ResetLow Pressure Cut Out- Automatic Reset Typical Low Side Pressurescheduled at a minimum of twice a year Sanitizing and CleaningICE MAKING SYSTEM: In place cleaning KEEP OUT OF THE REACH OF CHILDRENNote Left Hand Threads Bearing MaintenanceBearing Maintenance Water Sensor Sensor MaintenanceBin Control Sensor GEM0956 Maintenance Air CooledClean the air cooled condenser GEM0650Auger Auger Maintenance1. Disconnect electrical power to the ice machine 2. Turn off the water supply to the ice machinePossible Cause Service DiagnosisSymptom Probable CorrectionGEM0650/0956/1256 A/W Control System Diagnostics 4.High pressure cut out checkBin Controls Ice Level Sensors R&R- Water Reservoir, Bin ControlWater Reservoir To Remove the Breaker Bearing Assembly R&R-Bearingand BreakerR&R-Auger To Remove the AugerRemoval of the Water Seal R&R-WaterSealTo Remove the Water Seal To Replace the Water SealTo Reassemble the Evaporator and Auger R&R-EvaporatorTo Replace the Evaporator To Check the Gear Motor To Remove and Repair the Gear Motor AssemblyR&R-GearMotor To Inspect the Gear MotorR&R-FanBlade and Motor Refrigeration Service Instructions for Liquid Charging R404AGEM0650 Wiring Diagram Wiring Diagram GEM0650 A/WGEM0956 Wiring Diagram Wiring Diagram GEM0956 A/WGEM1256 Wiring Diagram Wiring Diagram GEM1256 A/WGEM0655 Wiring Diagram Wiring Diagram GEM0655 AirService History What to Do Before Calling for Service
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