Follett MCC400A/W - Manual (Page 28)

All service on refrigeration systems must be performed in accordance with all federal, state and local laws. It is
the responsibility of the technician to ensure that these requirements are met. Recharging icemaker to other than
factory specifications will void the warranty.
Refrigeration system (all models)
Refrigerant replacement requirements
1. Non-contaminated refrigerant removed from any Follett refrigeration system can be recycled and returned to
the same system after completing repairs. Recycled refrigerant must be stored in a clean, approved storage
container. If additional refrigerant is required, virgin or reclaimed refrigerant that meets ARI standard 700-88
must be used.
2. In the event of system contamination (for example, a compressor burn out, refrigerant leak, presence of non-
condensibles or moisture), the system must be repaired, evacuated and recharged using virgin or reclaimed
refrigerant that meets ARI standard 700-88.
3. Follett Corporation does not approve of recovered refrigerants. Improper refrigeration servicing procedures
will void the factory warranty.
Evacuation
Evacuate the system to a level of 500 microns. When the 500 micron level is reached, shut down the vacuum
pump. Allow the system to sit for approximately 20 minutes. During this period the system pressure should not rise.
If the system rises, evacuate the system again. If the system pressure rises for a second time, check the system
for leaks.
Ambients Minimum Maximum
Air Temperature1 10°C/50°F 37.8°C/100°F
Water Temperature2 4.4°C/40°F 32.2°C/90°F
1Ambient air temperature is measured at the air-cooled condenser coil inlet.
2Ambient water temperature is measured in the icemaker float reservoir.
Ice capacity test
Icemaker production capacity can only be determined by weighing ice produced in a specific time period.
1. Replace all panels on icemaker.
2. Run icemaker for at least 15 minutes.
3. Weigh and record weight of container used to catch ice.
4. Catch ice for 15 or 20 minutes.
1440 min. x wt. of ice produced
= Production capacity/24 hr. period
Total test time in minutes
5. Weigh harvested ice and record total weight.
6. Subtract weight of container from total weight.
7. Convert fractions of pounds to decimal equivalents (ex. 6 lbs 8oz = 6.5 lbs).
8. Calculate production using following formula:
9. Calculated amount per 24 hours should be checked against rated capacity for same ambient and water
temperatures in Ice Production Tables.
R404A icemaker charge specifications
Model Charge Refrigerant type
MCC400A, C/ET400A, C/ER400A, C/ED400A (air-cooled) 539g (19 oz) R404A
MCC400W, C/ET400W, C/ER400W, C/ED400W (water-cooled) 200g ( 7 oz) R404A
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