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 can not be
performed until the main disconnect switch (remote to the
unit) is turned off. Failure to do so will result in electrical
shock causing personal injury or death.
LINE-VOLTAGE CONNECTIONS
If unit contains an electric heater, remove and discard power plug
from fan coil and connect male plug from heater to female plug
from unit wiring harness. (See Electric Heater Installation Instruc-
tions.)
For units without electric heat:
1. Connect 208/230v power leads from field disconnect to
yellow and black stripped leads.
2. Connect ground wire to unit ground lug.
NOTE:
Units installed without electric heat should have a field-
supplied sheet metal block-off plate covering the heater opening.
This will reduce air leakage and formation of exterior condensa-
tion.
Check all factory wiring per unit wiring diagram and inspect
factory wiring connections to be sure none were loosened in transit
or installation.
Before installing or servicing system, always turn off all
power to system. There may be more than 1 disconnect
switch. Turn off accessory heater power if applicable. Elec-
trical shock can cause personal injury or death.
If a disconnect switch is to be mounted on the unit, select a
location where drill or fastener will not contact electrical or
refrigerant components. Electrical shock can cause personal
injury or death.
NOTE:
Before proceeding with electrical connections, make
certain that supply voltage, frequency, and phase are as specified
on unit rating plate. Be sure that electrical service provided by the
utility is sufficient to handle the additional load imposed by this
equipment.
See unit wiring label for proper field high- and low-voltage wiring.
Make all electrical connections in accordance with NEC and any
local codes or ordinances that may apply. Use copper wire only.
The unit must have a separate branch electric circuit with a
field-supplied disconnect switch located within sight from, and
readily accessible from the unit.
24–V
CONTROL
SYSTEM
CONNECTIONS
TO
UNIT
PRINTED-CIRCUIT BOARD (PCB)
Refer to unit wiring instructions for recommended wiring proce-
dures. Use No. 18 AWG color-coded, insulated (35°C minimum)
wires to make low-voltage connections between thermostat and
unit. If thermostat is located more than 100 ft from unit (as
measured along the low-voltage wires), use No. 16 AWG color-
coded, insulated (35°C minimum) wires. PCB is circuited for
single-stage heater operation. When additional heater staging is
desired using outdoor thermostats or Intelligent Heat Staging,
remove Jumper J2 on PCB to enable staging.
Connect low-voltage leads to thermostat and outdoor unit. (See
Fig. 9, 10, 11, or 12.)
INTELLIGENT HEAT STAGING OPTION
Intelligent Heat staging is an element of the Comfort Heat Pump
System. It requires the use of any one the following electric heat
packages: relay heaters KFCEH1401N09, KFCEH1501F15,
KFCEH1701C15,
KFCEH1801F20,
KFCEH1901C20,
KFCEH2101F24, OR KFCEH2201F30.
Complete system low-voltage wiring as shown in Fig. 9, 10, 11, or
12.
Fig. 8—A-Coil in Horizontal Left Application (Factory Ready)
A00072
A
B
C
FACTORY SHIPPED
HORIZONTAL LEFT
APPLICATION
AIR SEAL
ASSEMBLY
HORIZONTAL
DRAIN PAN
REFRIGERANT
CONNECTIONS
SECONDARY DRAIN
HORIZONTAL LEFT
PRIMARY DRAIN
HORIZONTAL LEFT
COIL
SUPPORT
RAIL
COIL
BRACKET
DRAIN PAN
SUPPORT
BRACKET
COIL
BRACKET
6
