Manitowoc RN0408A Mode D'emploi page 15

Section 2
Step 6 Leak Check The Refrigeration System
Leak check the new line set connections at the ice
machine head section, condensing unit and S trap as
well as all factory joints throughout the entire system.
Disconnect power to the remote condensing unit. Place
the rocker switch into the ON position. This allows the
low side and high side pressures to equalize for leak
checking. Place the rocker switch in the OFF position.
Connect power to the remote condensing unit and allow
system to pump down after leak checking is complete.
Step 7 Open The Valves Prior To Starting The Ice
Machine
A. Slowly backseat (open-turn counterclockwise)
the suction line shutoff valve.
B. Slowly backseat (open-turn counterclockwise)
the liquid line shutoff valve.
Open suction and liquid line
shut-off valves
Open Valves
Important
All refrigeration valve caps must be reinstalled to
prevent future refrigeration leaks.
Part Number 000007282 4/10
Verify O-ring in schrader valve caps are intact and
reinstall on shutoff valves to prevent refrigerant leakage.
Replace shutoff valve access caps and torque to the
following specifications.
Torque Values
Stem
Caps
Schrader Core
Step 8 Insulation Requirements
To prevent condensation the entire suction line must be
insulated. All insulation must be airtight and sealed at
both ends.
The following insulation requirements prevent
condensation at 90°F (32.2°C) ambient 90% Relative
Humidity. If higher humidity is expected, increase
insulation thickness.
The entire suction line set requires:
Suction Line Liquid Line
5/8 in. (16 mm) 3/8 in. (10 mm)
Important
To prevent condensation the entire suction line must
be insulated. All insulation must be airtight and
sealed at both ends.
The minimum requirements are for conditions at or
below 90% humidity and 90°F (32°C) ambient. When
higher humidity will be experienced, or local code
requires, insulation wall thickness will need to be
increased.
Installation Instructions
18-20 ft. lbs. (24.4-27.1 Nm)
12-15 ft. lbs. (16.3-20.3 Nm)
1.5-3 in. lbs. (0.17-0.34 Nm)
Min. Insulation
Thickness
1/2 in. (13 mm)
Suction Line
1/4 in. (7 mm)
Liquid Line
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