Manitowoc UFF0200A Manual Del Usuario página 21

Section 2
Step 5 Pressure Test and Evacuate Line Set and Ice
Machine Head Section
• Pressure testing and evacuation can be performed from
the ice machine head section or CVD condensing unit
shut-off valves.
• Schrader valve core removal tools that allow for removal
and installation of the valve cores without removing
manifold gauge set hoses are recommended to decrease
the evacuation time.
• Pressure test @ 150 psi (1000 kPa) for a minimum of
15 minutes.
• Minimum evacuation level is 500 microns.
Step 6 Open the valves and leak check the refrigeration
system prior to startup of the ice machine
A. Backseat (open-turn counterclockwise) the suction
shutoff valve.
B. Backseat (open-turn counterclockwise) the liquid
line shutoff valve.
Disconnect power to the remote condensing unit. Confirm
water is supplied to the ice machine, then place the ice
machine rocker switch in the ON position. The water trough
will fill and initiate an 8 minute delay period. When the 8
minute delay period ends the liquid line solenoid valve will
energize and equalize the low side and high side pressures.
Leak check the line set connections, S trap and all factory
joints throughout the entire system. When the leak check
is complete, place the rocker switch in the OFF position.
Connect power to the remote condensing unit and allow
system to pump down.
Verify suction and liquid line
shut-off valves are open before
operating the ice machine
Part Number 000017542 Rev 00 8/22
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 7 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
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
Liquid Line
Thickness
3/8 in. (9 mm)
Suction Line
3/8 in. (9 mm)
Liquid Line
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