73
Connect Power Wires to Oil Pump Starter — See Fig. 37.
Connect power wires to oil pump starter mounted in machine
power panel. Use separate fused disconnect or circuit breaker
as shown on job wiring diagrams and Fig. 37. Check that
power supply voltage agrees with oil pump voltage. Follow
correct phasing for proper motor rotation.
Connect Power Wires to Oil Heater Contactor — Connect
control power wiring between the oil heater contactor termi-
nals and terminals LL1 and LL2 on the field wiring strip in the
compressor motor starter. Refer to Fig. 38 and wiring label on
the machine power panel for units without split ring diffuser.
Refer to Fig. 39 for units with split ring diffuser.
Connect Wiring from Starter to Power Panel — Connect con-
trol wiring from main motor starter to the machine power
panel. All control wiring must use shielded cable. Also, con-
nect the communications cable. Refer to the job wiring dia-
grams for cable type and cable number. Make sure the control
circuit is grounded in accordance with applicable electrical
codes and instructions on machine control wiring label.
CARRIER COMFORT NETWORK INTERFACE — The
Carrier Comfort Network
®
(CCN) 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 communication
bus in a daisy chain arrangement. The positive pin of each sys-
tem 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
Fig. 27 for location of the CCN network connections on the ter-
minal strip labeled CCN.
NOTE: Conductors and drain wire must be 20 AWG (Ameri-
can Wire Gage) minimum stranded, tinned copper. Individual
conductors must be insulated with PVC, PVC/nylon, vinyl,
Teflon*, or polyethylene. An aluminum/polyester 100% foil
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.
When connecting the CCN communication bus to a system
element, a color code system for the entire network is recom-
mended to simplify installation and checkout. The following
color code is recommended:
If a cable with a different color scheme is selected, a similar
color code should be adopted for the entire network.
CAUTION
Do not punch holes or drill into the top surface of either
power panel. Knockouts are provided in the bottom of the
power panels for wiring connections. Damage to machine
could result.
WARNING
Voltage to terminals LL1 and LL2 (of each circuit) comes
from a control transformer in a starter built to Carrier speci-
fications. Do not connect an outside source of control
power to the compressor motor starter (terminals LL1 and
LL2 of each circuit). An outside power source will produce
dangerous voltage at the line side of the starter, because
supplying voltage at the transformer secondary terminals
produces input level voltage at the transformer primary ter-
minals. Severe injury could result.
LEGEND
Factory Wiring
Field Wiring
Oil Pump Terminal
Power Panel Component Terminal
Fig. 37 — Oil Pump Wiring
a19-638tf
LEGEND
Field Wiring
Power Panel Component Terminal
Fig. 38 — Oil Heater and Control Power Wiring
(Units without Split Ring Diffuser)
a19-1311tf
MANUFACTURER CABLE NO.
ALPHA 2413 or 5463
AMERICAN A22503
BELDEN 8772
COLUMBIA 02525
SIGNAL TYPE
CCN BUS
CONDUCTOR
INSULATION
COLOR
CCN NETWORK
INTERFACE
(CONTROL PANEL)
+ Red +
GROUND White G
– Black –
(WHT)
(WHT)
(BLK)
(BLK)
(BLK)
(WHT)
(BLK)
COMPRESSOR OIL HEATER
WIRING FOR 346V, 400V, 416V,
460V, 480V, & 575V OIL PUMP
COMPRESSOR OIL HEATER
WIRING FOR 200V & 230V
OIL PUMP
22 21
2C
1C
TO TB-G**
(BLK)
(WHT)
(WHT)
(WHT)
(BLK)
21
11
1C
2C
(BLK)
11
2C
21
LEGEND
Field Wiring
Power Panel Component Terminal
Fig. 39 — Oil Heater and Control Power Wiring
(Units with Split Ring Diffuser)
a19-1527ef
*Teflon is a registered trademark of DuPont.
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