Specifications

70
Replacing the Oil Filter
— Close the oil line ball valve locat-
ed in front of the oil filter. Connect a charging hose to the
1
/
4
-in.
access fitting port located downstream of the valve and bleed
off oil trapped between the service valve and the oil solenoid
valve. A quart of oil is typically what is removed during this
process. Remove the charging hose. Unscrew the nuts from
both ends of the oil filter and remove the oil filter. Remove the
protective caps from the new oil filter and install, being careful
not to lose or damage the new O-ring located on the new oil fil-
ter. Draw a vacuum at the Schrader port. Remove the charging
hose and open the oil line ball valve. Check both fittings for
leaks.
Cooler
SUCTION SERVICE VALVE — The suction service valve
is a factory-installed option for 30XW units. It is located in the
suction outlet of the cooler. The suction service valve is bolted
between the cooler outlet and the suction flange piping. The
suction service valve shaft has a locking device located on the
shaft to lock the valve in either a fully open position or a fully
closed position. The locking device must be pulled out prior to
moving the valve handle to a fully open or a fully closed posi-
tion. See Fig. 53A and 53B.
LOW FLUID TEMPERATURE — Main Base Board is pro-
grammed to shut chiller down if leaving fluid temperature
drops below 34 F (1.1 C) for cooler fluid type water or below
Brine Freeze Setpoint (Brine Freeze Setpoint, LOSP) for
cooler fluid type brine. The unit will shut down without a
pumpout. When fluid temperature rises to 6° F (3.3° C) above
the leaving fluid set point, safety resets and chiller restarts.
Reset is automatic as long as this is the first occurrence.
LOSS OF FLUID FLOW PROTECTION — All 30XW ma-
chines include an integral flow switch that protects the cooler
against loss of cooler flow. In addition, all models ordered for
heat reclaim duty have factory-installed condenser water sen-
sors and an integral flow switch.
TUBE PLUGGING — A leaky tube can be plugged until
retubing can be done. The number of tubes plugged determines
how soon the cooler must be retubed. All tubes in the cooler
may be removed. Loss of unit capacity and efficiency as well
as increased pump power will result from plugging tubes.
Failed tubes should be replaced as soon as possible. Up to 10%
of the total number of tubes per pass can be plugged before
retubing is necessary. Fig. 54 shows an Elliott tube plug and a
cross-sectional view of a plug in place. See Tables 44-47 for
plug components. If the tube failure occurs in both circuits
using tube plugs will not correct the problem. Contact your
local Carrier representative for assistance.
Table 44 — Condenser (Sizes 150-300) and
Evaporator (All Sizes) Plug Component Parts
*Order directly from Elliot Tube Company, Dayton, OH or RCD.
†Can be obtained locally.
Table 45 — Condenser (Sizes 150-300) and
Evaporator (All Sizes) Tube Components
LEGEND
NOTE: Tubes replaced along heat exchanger head partitions must
be flush with tube sheet (both ends).
Table 46 — Condenser (Sizes 325-400) Plug
Component Parts
*Order directly from Elliot Tube Company, Dayton, OH or RCD.
†Can be obtained locally.
CLOSED AND UNLOCKED
SUCTION SERVICE VALVE
OPENED AND LOCKED
SUCTION SERVICE VALVE
Fig. 53A — Suction Service Valve Locking Device,
Closed and Unlocked
Fig. 53B — Suction Service Valve Locking Device,
Open and Locked
A30-4843
A30-4844
CAUTION
Use extreme care when installing plugs to prevent damage
to the tube sheet section between the holes.
COMPONENT PART NUMBER
For Tubes
Brass Pin 853103-1*
Brass Ring 853002-657 or 670* (Measure inside
diameter of tube before ordering.)
For Holes without Tubes
Brass Pin 853103-1A*
Brass Ring 853002-738*
Loctite No. 675†
Locquic “N”†
COMPONENT
SIZE
in. mm
Tube Sheet Hole Diameter 0.752 to 0.757 19.10 to 19.23
Tube OD 0.742 to 0.748 18.85 to 19.00
Tube ID after Rolling
(includes expansion due to
clearance.)
0.666 to 0.681 16.92 to 17.30
ID — Inside Diameter
OD — Outside Diameter
COMPONENT PART NUMBER
For Tubes
Brass Pin 853103-2A*
Brass Ring 853002-918*
For Holes without tubes
Brass Pin 853103-3*
Brass Ring 853002-988*
Loctite No. 675†
Locquic “N”†