Scotsman F0822 - Manual (Page 9)

Refrigeration
BTUH Capacity Requirements
Model BTUH
N0622L or F0822L 4,000
N0922L, F1222L 5,000
N1322L 7,200
Condensing Units
Model Use Condensing Unit
N0622L or F0822L NME654-RHS-A/C
N0922L or F1222L NME954-RHS-A/C
N1322L None - rack only
Remote low side models require connection to
a dedicated condensing unit or a rack system.
Recommended Tubing from Head to Condensing
Unit
•
Suction Line: 5/8" OD
•
Liquid Line: 3/8" OD
Distance limits:
•
Maximum distance between dedicated
condensing unit and head: 75 feet.
•
Condensing Unit Elevation over Ice Making
Section: 35 feet.
Note: Elevations greater than 20 feet require
installation of a suction line trap at the 10 foot
mark.
Ice Making Section
•
Elevation over Condensing Unit: 15 feet.
Line Routing:
•
Allowed: One rise after a drop.
•
Allowed: One drop after a rise.
•
Not Allowed: More than one rise after a drop
•
Not Allowed: More than one drop after a rise
Roof Attachment
Install and attach the remote condensing unit to the
roof of the building, using the methods and
practices of construction that conform to the local
building codes, including having a roofing
contractor secure the condenser to the roof.
Refrigeration Installation:
Connections
The liquid and suction fittings on the back of the
cabinet are stubs. The liquid line size is 3/8" OD.
The suction line size is 5/8" OD.
1. Recover holding charge
2. Cut the stubs off.
3. Braze line set tubing to each fitting. Sweep with
dry nitrogen while brazing.
4. Dedicated condensing unit: Evacuate complete
system to 50 microns.
5. Open the ball valves.
Rack: The skills of a refrigeration technician are
required to connect the ice machine to the
building’s refrigeration system.
Notes:
•
R-404A models: 1.5 ounces of R-404A
refrigerant is in the system as a holding
charge.
•
Be sure the liquid connection is NOT in
series with another liquid line valve.
•
Local Codes must be observed.
Dedicated condensing unit: Add refrigerant charge.
Recommended starting field charge:
•
N0622L or F0822L: 8 lb R-404A
•
N0922L or F1222L: 8 lb R-404A
•
N1322L: n/a - rack only
July 2009
Page 8
N0622L, F0822L, N0922L, F1222L, N1322L, F1522L
Remote Low Side User's Manual