Manitowoc RF Serie Manuel D'utilisation page 19

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
Part Number 000007644 Rev 01 12/16


Important
All refrigeration valve caps must be reinstalled to
prevent future refrigeration leaks.
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°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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