Refrigeration system
Important:
All service on refrigeration systems must be performed in accordance with all federal, state and local
laws that pertain to the use of refrigerants. It is the responsibility of the technician to ensure that
these requirements are met.
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 50 microns. When the 50 micron level is reached, shut the vacuum pump down.
Allow the system to sit for approximately 30 seconds. During this period the system should not rise above 1000
microns. If the system rises above 1000 microns, evacuate the system again. If the system rises above 1000
microns for a second time, check the system for leaks.
Ambients
Minimum
Maximum
Air Temperature1
50°F/10°C 100°F/37.8°C
Water Temperature2
40°F/4.4°C 90°F/32.2°C
1Ambient air temperature is measured at the air-cooled condenser coil inlet.
2Ambient water temperature is measured in the icemaker float reservoir.
I
ce 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.
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 8 oz = 6.5 lbs).
8. Calculate production using following formula:
1440 min. x wt. of ice produced
=
Production capacity/24 hr. period
Total test time in minutes
9. Calculated amount per 24 hours should be checked against rated capacity for same ambient and water
temperatures in Ice Production Tables.
R22 icemaker charge specifications
Model
Charge
Refrigerant type
T5A, R5A , L5A (air-cooled)
24 oz
R22
T5W, R5W , L5W (water-cooled)
10 oz
R22
11
Recharging of unit at other than factory specifications will void icemaker
warranty.
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