FMC4X, FMC4Z: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
3
Design the duct system in accordance with “ACCA” Manual “0” Design
for Residential Winter and Summer Conditioning and Equipment
Selection. Latest editions are available from: “ACCA” Air Conditioning
Contractors of America. If duct system incorporates flexible air duct, be
sure pressure drop information (straight length plus all turns) shown in
“ACCA” Manual “D” is accounted for in system.
RETURN AIR
All return air must be filtered. Fan coil can be installed with a return-air
duct, as long as airflow constraints published in the product data are met,
or in a free return application. When installed as a backside ducted
return, an insulated cover for the bottom casing opening must be field
fabricated and installed. Refer to Fig. 1, dimension C for width of
opening for ducted return. When installed as a free air return, a louvered
panel must be used if the area the fan coil is installed is not sealed (see
Product Data for louvered panel kit). Air filters should be located at the
return air openings to the fan coil location. Refer to the Product Data
sheet for a list of louvered access panel kits.
Condensate Drain
Condensate pan has primary and secondary drain connections to meet
FHA requirements (Fig. 2). These connections have 3/4" (19 mm) male
pipe threads. Tubing for all condensate drains should be a minimum of
7/8" (22 mm) OD. Drain lines from condensate pan to exterior of unit
must be plastic pipe. Drain should be pitched downward at a slope of 1"
per 10 feet (25 mm per 3 m). If coil is located in or above a living space
where damage may result from condensate overflow, a separate 3/4" (19
mm) drain must be provided from secondary drain connection. Run this
drain to a place in compliance with local installation codes where it will
be noticed when unit is operational.
Condensate flow from secondary drain indicates a plugged primary
drain. Install a 2" (51 mm) trap in condensate drain line as close to coil
as possible. A factory approved drain trap kit is available. Make sure that
the top of trap is below connection to drain pan to prevent condensate
from overflowing drain pan. Prime all traps, test for leaks, and insulate
in areas where sweating of the traps and drain lines could potentially
cause water damage Consult local codes for additional restrictions or
precautions.
Accessory UV-C lights are not approved for use with this fan coil.
A210093
Fig. 2 – Alternate Condensate Pan Mounting Holes
Electrical Connections
Refer to unit wiring instructions for recommended wiring procedures.
Use No. 18 AWG color-coded, insulated (35°C minimum) wire to make
low-voltage connections between thermostat and unit. If thermostat is
located more than 100 ft. (30 m) from unit as measured along
low-voltage wire, use No. 16 AWG color-coded, insulated (35°C
minimum) wire.
NOTE: Before proceeding with electrical connections, make certain that
voltage, frequency, and phase correspond to that specified on rating
plate. Also, check to be sure that the service provided by utility is
sufficient to handle additional load imposed by this equipment.
Refer to 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 might apply. Unit must have a separate branch
electrical circuit.
NOTE: All units are shipped from factory wired for 240VAC
transformer operation. For 208VAC operation, move primary lead from
240VAC terminal to 208VAC terminal.
WARNING
!
INJURY HAZARD
Failure to follow this warning could result in personal injury or death.
Do not, under any circumstances, connect return ductwork to any other
heat-producing device such as fireplace inserts, stoves, etc.
Unauthorized use of such devices may result in fire, carbon monoxide
poisoning, explosion, personal injury or property damage.
WARNING
!
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing or servicing the unit, always turn off all power to unit.
There may be more than one disconnect switch. Turn off accessory
heater power if applicable. Lock out and tag switch with a suitable
warning label.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Field wires on side of disconnect found in fan coil remain live, even
when circuit breaker is off. Service and maintenance to incoming
wiring cannot be performed until main disconnect switch (remote to the
unit) is turned off. Lock out and tag switch with a suitable warning
label.
Unit cabinet must have a continuous electrical path to ground in order
to minimize potential for personal injury or death if an electrical fault
should occur. This ground may consist of electrical wire or approved
conduit when installed in accordance with existing codes. (See Item 3
below, regarding UL Listed Conduit.)
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