Manitowoc Ice Chiplet QC0700 - Manual (Page 26)

Installation Instructions Section 2
2-16 Part Number 000002688
Step 4 Connecting the line set.
To prevent oxidation of the copper, purge line set and
condensing unit with dry nitrogen while brazing.
Connect The Line Set To The Ice Machine Head
Section
The line set shut off valves at the back of the ice
machine must remain closed and be protected from heat
during the brazing process. Wrap the valves in a wet rag
or other type of heat sink prior to brazing. Cool braze
joint with water immediately after brazing to prevent heat
migration to the valve.
Connect The Line Set To The Remote Condensing
Unit
The compressor oil rapidly absorbs moisture. Be
prepared to complete line set installation and start your
evacuation process in order to minimize the time the
compressor is exposed to the atmosphere. (Maximum
amount of time the system can be exposed to the
atmosphere is 15 minutes).
The line set can be routed for entry through the front or
left side of the condensing unit.
• Remove knockout for preferred location.
• Insert supplied plastic bushings in knockout holes to
prevent tubing from contacting sheet metal.
• Use the supplied 90° elbows to route tubing.
• Cut the tubing ends of the suction and liquid lines
and braze the line sets to the condensing unit.
! Warning
The ice machine head section contains refrigerant
charge. The ice machine head section contains three
(3) refrigeration valves that must remain closed until
proper installation of the line sets is completed.
! Warning
The condensing unit ships from the factory
pressurized with a 50/50 mixture of nitrogen/helium.
Bleed off pressure from both suction and liquid line
access ports prior to cutting into refrigeration lines.
VALVES MUST REMAIN
CLOSED AND BE
PROTECTED FROM
HEAT WHEN BRAZING
(WRAP WITH WET RAG)
SV1757
SV2100
MINIMIZE THE TIME THE REFRIGERATION
SYSTEM IS EXPOSED TO THE ATMOSPHERE
(15 MINUTES MAXIMUM)
SUCTION
FILTER
SUCTION
LINE