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24
Refrigeration charge
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 ice machine to other than
factory speci cations will void the warranty.
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, close all valves. Allow the
system to sit for approximately 20 minutes. During this period the system pressure should not rise. If the system
pressure rises and stabilizes there is moisture in the system and further evacuation is needed. If the pressure
continues to rise check the system for leaks.
Ambients Minimum Maximum
Air temperature
1
50 F/10 C 100 F/37.8 C
Water temperature
2
45 F/7 C 90 F/32.2 C
1
Ambient air temperature is measured at the air-cooled condenser coil inlet.
2
Ambient water temperature is measured in the ice machine water reservoir.
Ice capacity test
Ice machine production capacity can only be determined by weighing ice produced in a speci c time period.
1. Replace all panels on ice machine.
2. Run ice machine for at least 15 minutes.
3. Weigh and record weight of container used to catch ice.
4. Catch ice for 15 or 20 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 ice machine charge speci cations
Model Charge Refrigerant type
HCC/HMC1000A (air-cooled) 24oz (652g) R404A
HCC/HMC1000W (water-cooled) 15oz (426g) R404A
1440 min. x wt. of ice produced
= Production capacity/24 hr. period
Total test time in minutes
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