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plugging, check with a local Carrier representative to find out
how the number and location of tubes can affect unit capacity.
Fig. 27 shows an Elliott tube plug and a cross-sectional view of
a plug in place. See Tables 37 and 38 for plug components.
Table 37 — Plug Component Part Numbers
*Order directly from Elliot Tube Company, Dayton, OH or RCD.
†Can be obtained locally.
Table 38 — Plug Component Dimensions
NOTE: Tubes next to gasket webs must be flush with tube sheet
(both ends).
For the 30RB150-390 coolers, the pass partition has a perfo-
rated distribution plate in the inlet pass to more uniformly
distribute the refrigerant as it enters the first pass tubes of the
cooler. The perforated distribution plate is on the tubesheet side
of the pass partition. A tube plug in a first pass tube will inter-
fere with the installation of pass partition. The tube plug must
be flush with the tube sheet to prevent this interference. The
pass partition is symmetrical, meaning the partition plate can be
rotated 180 degrees, however, the performance of the machine
will be affected if the pass partition is installed incorrectly.
RETUBING — When retubing is required, obtain service of
qualified personnel experienced in boiler maintenance and
repair. Most standard procedures can be followed when retub-
ing the coolers. An 8% crush is recommended when rolling
replacement tubes into the tubesheet.
The following Elliott Co. tube rolling tools are required:
• Expander Assembly
• Cage
• Mandrel
• Rolls
Place one drop of Loctite No. 675 or equivalent on top of
tube prior to rolling. This material is intended to “wick” into the
area of the tube that is not rolled into the tube sheet, and prevent
fluid from accumulating between the tube and the tube sheet.
CAUTION
Use extreme care when installing plugs to prevent damage
to the tube sheet section between the holes.
COMPONENTS FOR PLUGGING
PART NUMBER
For Tubes
Brass Pin
853103-312*
Brass Ring
853002-322*
For Holes without tubes
Brass Pin
853103-375
Brass Ring
853002-377
Loctite
No. 675 †
Locquic
“N” †
PLUG COMPONENT
SIZE
in.
mm
Tube sheet hole diameter
0.377-0.382
9.58-9.70
Tube OD
0.373-0.377
9.47-9.58
Tube ID after rolling (includes
expansion due to clearance.)
0.328
8.33
Fig. 27 — Elliott Tube Plug
CLOSED
OPEN
CLOSED
OPEN
GASKET
OPEN VALVE IN QUICK TEST SUB-MODE BEFORE DISASSEMBLING
EF05BD271
NV 32.5mm
EF05BD331
NV 36mm
50Nm (36 ft-lb)+ 30°
27mm / 1
1
/
16
''
27mm / 1
1
/
16
''
DISASSEMBLY
ASSEMBLY
NOTES:
1. Push down on valve piston to close valve before assembling.
2. After valve is assembled close valve in Quick Test sub-mode or cycle power before opening service valve.
Fig. 26 — Disassembly and Assembly of EXV Motor
NOTE: Open valve in Quick Test sub-mode before disassembling.
Summary of Contents for AQUASNAP 30RBA315
Page 77: ...77 Fig 37 Control Schematic 30RB060 080 a30 4619...
Page 78: ...78 Fig 38 Control Schematic 30RB090 150 a30 4620...
Page 79: ...79 Fig 39 Control Schematic 30RB160 190 a30 4622...
Page 80: ...80 Fig 40 Control Schematic 30RB210 300 a30 4622...
Page 81: ...81 Fig 41 Heat Reclaim Control Schematic a30 4622...