N0922L, N1322L, F1222L, F1522L
D Series Remote Low Side User Manual
October 2014
Page 9
Refrigeration
BTUH Capacity Requirements
Model
BTUH
N0922L, F1222L
5,000
N1322L, F1522L
7,200
Condensing Units
Model Use Condensing Unit
N0922L or F1222L
NME954-RHS-A/C
N1322L or F1522L
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:
• N0922L or F1222L: 8 lb R-404A
• N1322L of F1522L: n/a - rack only
