Carrier WeatherMaker 48TC 04, Installation Instructions Manual

Page: 15 / 60

15
FIELD POWER SUPPLY — If equipped with optional
Powered Convenience Outlet: The power source leads to the
convenience outlet’s transformer primary are not factory con-
nected. Installer must connect these leads according to required
operation of the convenience outlet. If an always-energized
convenience outlet operation is desired, connect the source
leads to the line side of the unit-mounted disconnect. (Check
with local codes to ensure this method is acceptable in your ar-
ea.) If a de-energize via unit disconnect switch operation of the
convenience outlet is desired, connect the source leads to the
load side of the unit disconnect. On a unit without a unit-
mounted disconnect, connect the source leads to compressor
contactor C and indoor fan contactor IFC pressure lugs with
unit field power leads.
Refer to Fig. 23 for power transformer connections and the
discussion on connecting the convenience outlet on page 18.
Field power wires are connected to the unit at line-side pres-
sure lugs on compressor contactor C and indoor fan contactor
IFC (see wiring diagram label for control box component ar-
rangement) or at factory-installed option non-fused disconnect
switch. Max wire size is #2 AWG (copper only). (See Fig. 23.)
NOTE: TEST LEADS - Unit may be equipped with short
leads (pigtails) on the field line connection points on contactor
C or optional disconnect switch. These leads are for factory
run-test purposes only; remove and discard before connecting
field power wires to unit connection points. Make field power
connections directly to line connection pressure lugs only.
Fig. 23 — Power Wiring Connections
UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT — The factory-installed option non-fused
disconnect (NFD) switch is located in a weatherproof enclo-
sure located under the main control box. The manual switch
handle and shaft are shipped in the disconnect enclosure.
Assemble the shaft and handle to the switch at this point. Dis-
card the factory test leads (see Fig. 24).
Connect field power supply conductors to LINE side termi-
nals when the switch enclosure cover is removed to attach the
handle.
Fig. 24 — Location of Non-Fused Disconnect
Enclosure
To field install the NFD shaft and handle
1. Remove the unit front pane (see Fig. 2).
2. Remove (3) hex screws on the NFD enclosure - (2) on the
face of the cover and (1) on the left side cover (see
Fig. 25).
3. Remove the front cover of the NFD enclosure.
4. Make sure the NFD shipped from the factory is at OFF
position (the arrow on the black handle knob is at OFF).
5. Insert the shaft with the cross pin on the top of the shaft in
the horizontal position.
6. Measure from the tip of the shaft to the top surface of the
black pointer; the measurement should be 3.75 to 3.88 in.
(95 to 99 mm).
7. Tighten the locking screw to secure the shaft to the NFD.
8. Turn the handle to the OFF position with red arrow point-
ing at OFF.
9. Install the handle on to the painted cover horizontally
with the red arrow pointing to the left.
10. Secure the handle to the painted cover with (2) screws
and lock washers supplied.
11. Engaging the shaft into the handle socket, re-install (3)
hex screws on the NFD enclosure.
12. Re-install the unit front panel.
Fig. 25 — Handle and Shaft Assembly for NFD
WARNING
Failure to follow this warning could result in intermit-
tent operation or performance satisfaction.
Do not connect aluminum wire between disconnect
switch and 48TC unit. Use only copper wire. (See Fig. 24.)
DI S CONNECT
PER
NEC
DI S CONNECT
PER
NEC
20 8 /2 3 0-1-60
11 1 3
11 1 3 1 3
L1
L2 L 3
TB
C
C IFC
or
(1-ph
IFM)
20 8 /2 3 0- 3 -60
460- 3 -60
3 75- 3 -60
575- 3 -60
UNIT S WITHOUT DI S CONNECT OPTION
UNIT S WITH DI S CONNECT OPTION
2
4
6
1
3
5
L1
L2
L 3
OPTIONAL
DI S CONNECT
S WITCH
DI S CONNECT FACTORY TE S T LEAD S ; DI S CARD.
FACTORY
WIRING