Carrier FMC4X - User Manual

Installation Instructions
NOTE: Read the entire instruction manual before starting the installation.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance, or
use can cause explosion, fire, electrical shock, or other conditions which
may cause death, personal injury or property damage. Consult a
qualified installer, service agency, or your distributor or branch for
information or assistance. The qualified installer or agency must use
factory-authorized kits or accessories when modifying this product.
Refer to individual instructions packaged with kits or accessories when
installing.
Follow all safety codes. Wear safety glasses, protective clothing, and
work gloves. Use quenching cloth for brazing operations. Have a fire
extinguisher available. Read these instructions thoroughly and follow all
warning or cautions included in literature and attached to the unit.
Consult local building codes and the current editions of the National
Electrical Code (NEC) NFPA 70.
In Canada, refer to the current editions of Canadian Electrical Code CSA
C22.1.
Recognize safety information. This is the safety alert symbol . When
you see this symbol on the unit and in instructions or manuals, be alert to
the potential for personal injury. Understand the signal words
DANGER, WARNING, and CAUTION. These words are used with the
safety alert symbol. DANGER identifies the most serious hazards which
will result in severe personal injury or death. WARNING signifies
hazards which could result in personal injury or death. CAUTION is
used to identify unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.
INTRODUCTION
FMC4X and FMC4Z Fan Coils are designed for horizontal orientation
and are suitable for ceiling installations in conditioned spaces. These
units are available with field -installed electric heat, and are used indoors
as the fan coil for split -system heat pumps or air conditioners. FMC4X
and FMC4Z models all have a factory-installed TXV and are
available in 18,000 through 36,000 Btuh nominal cooling capacities.
FMC4X units utilize a 3-speed PSC motor. FMC4Z units utilize a
5-speed ECM motor.
Field-installed heaters are available in 3, 5, 6, 7.5 and 10 kW sizes. The
coil is equipped with sweat-type connections and is vapor-charge with
dry nitrogen.
Units are designed for horizontal applications only. Local codes may
limit this free-air-return type unit to installation in single-level
applications.
NOTE: Nuisance sweating may occur if the unit is installed in a humid
location with low airflow.
INSTALLATION
Check Equipment
Unpack unit and move to final location. Remove from carton, avoid
lifting from blower wheels, taking care not to damage unit. Inspect
equipment for damage prior to installation. File claim with shipping
company if shipment is damaged or incomplete. Locate rating plate on
unit. It contains information needed to properly install unit. Check rating
plate to be sure unit matches job specifications.
NOTE: Installation clearance from combustible materials is 0" (0 mm)
from unit and supply-air duct.
Mount Fan Coil
Fan Coil Mounting
Mounting brackets are provided on all four corners of the casing for
attachment of the fan coil to supporting structure. The supporting
structure must be designed to safely support the full weight of the fan
coil. Field supplied washers and bolts capable of supporting the fan coil
load should be used to secure the fan coil to the supporting structure at
the mounting slots.
The fan coil must be mounted level to ensure proper drainage of
condensate. If the supporting structure is not level at the points of fan
coil attachment, then spacers must be used to level the fan coil.
FMC4X, FMC4Z
APARTMENT FAN COIL UNIT
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
!
EXPLOSION HAZARD
Failure to follow this warning could result in death, serious personal
injury, and/or property damage.
Never use air or gases containing oxygen for leak testing or operating
refrigerant compressors. Pressurized mixtures of air or gases containing
oxygen can lead to an explosion.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and wear
appropriate protective clothing, safety glasses and gloves when
handling parts.

Summary

Safety Considerations

Electrical Operation Hazard

Warning: Turn off all power to the unit before installation or service. Lock out and tag.

Explosion Hazard

Warning: Never use oxygen for leak testing or compressor operation, as it can cause an explosion.

Cut Hazard

Caution: Sheet metal parts have sharp edges; use protective gear when handling.

Introduction to Fan Coil Units

Installation Procedures

Equipment Inspection and Mounting

Steps for checking equipment, mounting fan coil, and ensuring level installation.

Supply-Air Connections

Guidelines for installing air ducts, focusing on flexible connectors and insulation.

Environmental Hazard

Caution: Do not vent refrigerant to atmosphere; recover during repair or disposal.

Injury Hazard

Warning: Do not connect return ductwork to other heat-producing devices like fireplaces.

Return Air Requirements

Requirements for filtering return air and installation options for ducted or free return.

Condensate Drain Management

Details on drain connections, tubing, and trap requirements for condensate removal.

Electrical Connections and Safety

Instructions for electrical connections and warnings for operational and shock hazards.

Blower Speed Selection

Instructions for selecting the correct fan speed for cooling and heating operations.

TXV Adjustment

Information about the factory-preset Thermostatic Expansion Valves (TXVs).

System Start-Up

Instructions for system start-up and refrigerant charging methods.

Sequence of Operation

Detailed explanation of unit operation modes: Continuous Fan, Cooling, Heat Pump.

Care and Maintenance

Electrical Operation Hazard

Warning: Disconnect all power before servicing unit. Lock out and tag.

Cut Hazard

Caution: Sheet metal edges can be sharp; use protective gear when handling.

Carrier FMC4X Specifications

General

Model Number	FMC4X
Type	Ceiling Fan
Voltage	120V
Speed	3-speed
Blade Diameter	52 inches