VI. MAKE ELECTRICAL CONNECTIONS
Be sure field wiring complies with local building codes and
NEC, and unit voltage is within limits shown in Table 5.
Contact local power company for correction of improper line
voltage.
WARNING:
To avoid personal injury or damage to unit,
do not make electrical connections until all power sources
are shut down, locked out, and tagged off. Failure to do
so could result in personal injury or unit damage.
CAUTION:
Operation of unit on improper line volt-
age constitutes abuse and could affect warranty. Refer
to Table 5 for permissible operating limits. Do not in-
stall unit in system where voltage may fluctuate above
or below permissible limits.
NOTE:
Use type NM power cable only (per NEC; provided
for fan coil units only) between disconnect switch and unit.
NOTE:
Install branch circuit disconnect per NEC of ad-
equate size to handle unit starting current. Locate discon-
nect within sight from and readily accessible from unit, per
Section 440-14 of NEC. Some codes allow indoor unit to share
disconnect with outdoor unit if disconnect can be locked; check
local code before installing in this manner. To make electrical
connections:
1. Remove the screws holding the front cover of the fan
coil unit, and remove front cover. Save screws and screw
covers for reinstallation.
2. Remove control box strain relief clamp (see Fig. 13).
3. Remove any factory test leads still connected to the power
terminal box. These leads are for factory testing only
and cannot be used for power connections.
4. Route the factory-supplied ground and power wires from
terminal block 1 (TB1) to the field-supplied disconnect
switch.
WARNING:
According to NEC and most local codes,
the unit must have an uninterrupted, unbroken ground
to minimize personal injury if an electrical fault should
occur. The ground may consist of electrical wire or metal
conduit when installed in accordance with existing elec-
trical codes. Failure to follow this warning could result
in an electric shock, fire, or death.
5. Route factory-supplied line power leads (see Fig. 14) from
field-supplied, indoor unit disconnect to the fan coil unit
TB1 (see Fig. 14 and 15). Run wire through the strain
relief on the control box (see Fig. 13). When routing wire
in the fan coil unit, keep the wire away from refrigerant
and condensate piping and any sharp edges on the unit.
CAUTION:
Do not short circuit the 619E trans-
former — it is fused. The transformer can be short cir-
cuited by connecting the wrong wires or by touching a
live wire to the side of a grounded control box.
Fig. 12 — Drainage System (Rear Piping Shown)
NOTE: This shows item locations only. Front cover of fan coil unit must
be removed to access terminal boards.
Fig. 13 — Fan Coil Unit Wiring Preparation
FAN COIL UNITS
LEGEND
CONN
— Connection
EQUIP GND — Equipment Ground
TB
— Terminal Block
Fig. 14 — Line Power Connections
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