Carrier Comfort Network (Ccn) And Local Equipment Network (Len) Interface; Check Starter; Oil Charge - Carrier AquaEdge 19XR Series Start-Up, Operation And Maintenance Instructions Manual

properly lubricated and have proper electrical supply and
proper rotation.
9. Tighten all wiring connections and inspect power panel
(19XR2-E) or control panel (19XR6/7) to ensure contrac-
tor has used the knockouts to feed the wires into the enclo-
sures and that appropriate strain relief is provided.
10. Verify all field connected wiring including option control
wiring to control panel.
11. Field-installed starters only (or for VFD units only if chiller
controls indicate ground fault), test the chiller compressor
motor and its power lead insulation resistance with a 500-v
insulation tester such as a megohmmeter. (Use a 5000-v tester
for motors rated over 600 v.) Factory mounted starters do not
require a megohm test.
a. Open the starter main disconnect switch and follow
lockout/tagout rules.
CAUTION
If the motor starter is a solid-state starter or VFD, the motor
leads must be disconnected from the starter before an insula-
tion test is performed. The voltage generated from the tester
can damage the starter/VFD components.
CAUTION
Do not route control wiring carrying 30 v or less within a
conduit carrying 50 v or higher. Failure to observe this pre-
caution could result in electromagnetic interference in the
control wiring.
b. With the tester connected to the motor leads, take 10-
second and 60-second megohm readings as follows:
6-Lead Motor — Tie all 6 leads together and test
between the lead group and ground. Next tie the leads
in pairs: 1 and 4, 2 and 5, and 3 and 6. Test between
each pair while grounding the third pair.
3-Lead Motor — Tie terminals 1, 2, and 3 together
and test between the group and ground.
c. Divide the 60-second resistance reading by the 10-
second reading. The ratio, or polarization index, must
be one or higher. Both the 10 and 60-second readings
must be at least 50 megohms. If the readings on a
field-installed starter are unsatisfactory, repeat the test
at the motor with the power leads disconnected. Satis-
factory readings in this second test indicate the fault is
in the power leads.
NOTE: Unit-mounted starters do not have to be meg-
ohm tested.
12. Tighten all wiring connections to the plugs on the IOBs
and PIC6 HMI panel.
13. On chillers with free-standing starters, inspect the power
panel (19XR2/E) to ensure that the contractor has fed the
wires into the bottom or side of the panel. The installation
of wiring into the top of the panel can cause debris to fall
into the contactors. Clean and inspect the contactors if this
has occurred.
14. Torque all AC power terminals to specified torque.
WARNING
Do not apply power unless a qualified Carrier technician is
present. Serious personal injury may result.
Carrier Comfort Network (CCN) and
Local Equipment Network (LEN) Interface
The Communication bus wiring is supplied and installed by the
electrical contractor. It consists of shielded, 3-conductor cable
with drain wire. The system elements are connected to the com-
munication bus in a daisy chain arrangement. The positive pin of
each system element communication connector must be wired to
the positive pins of the system element on either side of it. The
negative pins must be wired to the negative pins. The signal
ground pins must be wired to the signal ground pins. See installa-
tion manual.
NOTE: Conductors and drain wire must be 20 AWG (American
Wire Gage) minimum stranded, tinned copper.
Individual conductors must be insulated with PVC, PVC/nylon,
vinyl, Teflon , or polyethylene. An aluminum/polyester 100% foil
1
shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or
Teflon with a minimum operating temperature range of –4°F to
140°F (–20°C to 60°C) is required. See table below for cables that
meet the requirements.
MANUFACTURER
ALPHA
AMERICAN
BELDEN
COLUMBIA
When connecting the communication bus to a system element,
a color code system for the entire network is recommended to
simplify installation and checkout. The following color code is
recommended:
SIGNAL TYPE
INSULATION COLOR
+
GROUND
–

Check Starter

MECHANICAL STARTER
1. Check all field wiring connections for tightness, clearance
from moving parts, and correct connection.
2. Check the contactor(s) to ensure they move freely. Check
all other electro-mechanical devices, such as relays, for
free movement. If the devices do not move freely, contact
the starter manufacturer for replacement components.
3. Reapply starter control power (not main chiller power) to
check the electrical functions

Oil Charge

The oil charge for the 19XR:
• Frame 2 compressor — 8 gal (30 L)
• Frame 3 compressor — 8 gal (30 L)
• Frame 4 compressor — 12 gal (45 L)
• Frame 4 compressor with split ring diffuser option —
12 gal (45 L)
• Frame C compressor - 14.1 gal (53.4 L)
• Frame 5 compressor — 22.5 gal (85.2 L)
• Frame E compressor — 15.3 gal (57.9 L)
• Frame 6 compressor — 28.5 gal (107.9 L)
• Frame 7 compressor — 44.4 gal (168 L)
The chiller is shipped with oil in the compressor. When the sump
is full, the oil level should be no higher than the middle of the
upper sight glass, and minimum level is the bottom of the lower
sight glass (Fig. 3-5). If oil is added, it must meet Carrier's spec-
ification for centrifugal compressor use as described in the Oil
Specification section on page 49. Charge the oil through the oil
charging valve located near the bottom of the transmission hous-
ing. The oil must be pumped from the oil container through the
charging valve due to higher refrigerant pressure. The pumping
device must be able to lift from 0 to 200 psig (0 to 1380 kPa) or
1. Teflon is a registered trademark of DuPont.
30
CABLE NO.
2413 or 5463
A22503
8772
02525
CCN BUS
CCN TERMINAL
CONDUCTOR
CONNECTION
Red Red (+)
White White (G)
Black Black (–)