Step 5 - Electrical Connections - Carrier Performance 40MBDQ Series Installation Instructions Manual

Step 5 - Electrical Connections

Before proceeding with electrical connections, make certain
that the supply voltage, frequency, phase, and ampacity are as
specified on the unit rating plate. Review the unit wiring label
for proper field high and low voltage wiring.
Ensure all electrical connections are in accordance with the
NEC and any local codes or ordinances that may apply. Use
copper wire only.
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or property
damage.
If a disconnect switch is to be mounted on the unit, select a
location where the drill or fastener will not contact electrical or
refrigerant components.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or
death.
Field wires on the line side of the disconnect found in the fan coil
unit remain live, even when the pull-out is removed.
Service and maintenance to incoming wiring cannot be performed
until the main disconnect switch (remote to the unit) is turned off.
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Size the wires in accordance with NEC and local codes.
14
Ferrite Core (Magnetic Ring) - If supplied and packed with
the accessories, wrap the signal wires between the indoor unit
and outdoor unit after installation and around the Ferrite core
twice.
Specifications subject to change without notice.
1. Run a interconnecting wiring from the outdoor unit to the indoor
unit.
2. Connect the wiring from the outdoor unit per the connection
diagram (See Fig. 43 — on page 16 and See Fig. 44 — on page 16).
3. Prepare the cable for connection.
a. Use wire strippers to strip the rubber jacket from both ends
of the signal cable to expose roughly 5.9in(15cm) of wire.
b. Strip the insulation from both ends of the wires.
c. Use a wire crimper to crimp the u-lugs to the end of the
wires.
4. Remove the electric control box cover of the indoor unit.
5. Connect the u-lugs to the terminals. Match the wire colors/labels
with the labels on the terminal block. Firmly screw the u-lug of
each wire to its corresponding terminal. Refer to the serial number
and wiring diagram located on the cover of the electric control box.
Control box
Wiring diagram Connective wiring diagram
Fig. 41 — Control Box
L1 L2 S
Pass the belt through the hole
of the ferrite core
to secure it to the cable
Fig. 42 — Ferrite Core (Magnetic Ring)
6. Clamp the cable with the cable clamp. Ensure the cable is not loose
as to not pull on the u-lugs.
7. Replace the indoor unit field wiring cover.
(Magnetic Ring)
IM-40MBDQ-05