Horizon 1000R/N Ice Machines
25
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 valves and both manifold
and 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 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 (evaporator unit)
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
1Ambient air temperature is measured at the air-cooled condenser coil inlet.
2Ambient water temperature is measured in the ice machine float reservoir.
Ice capacity test
Ice machine production capacity can only be determined by weighing ice produced in a specific 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 lb 8 oz = 6.5 lb).
8. Calculate production using following formula:
1440 min. x wt. of ice produced
Total test time in minutes
=
Production capacity/24 hr.
9. Calculated amount per 24 hours should be checked against rated capacity for same ambient and water
temperatures in Ice Production Tables.
