Carrier FCM Service And Maintenance Instructions

FCM/A5, FEV, FJM, FEM4, FHMA5, FMA4/5, FM(C,U)5, FS(A,M,U)4, FTMA5,
F(V,X)M4, F5M4, REM4, WA(H,M,P,X) WB(G,H)L, WC(G,H)L
Residential Fan Coil Units
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Fan Coil Description and Troubleshooting. . . . . . . . . . . . . . . . . . . . . 2
FSM, FSU4, FSA4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
FED, FEU, FEM4P, FEM4X, FEV, FXM4, F5M4, WAHA, WAPM,
WAPT, WAPL, WAHM, WAHT, WAHL, WAXM, WAXT, WAXL,
WBGL, WCGL, WBHL, REM4P, REM4X . . . . . . . . . . . . . . . . . 4
FVM, FTM, FG4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
FMA4P, WAMA, FMA4X, WAXA . . . . . . . . . . . . . . . . . . . . . . 17
Electric Heater Function and Troubleshooting . . . . . . . . . . . . . . . . . 23
FM(C,U)4, FED, FEU, FEM4, FEV, FCM, FMA4, FMA5, FSA4, FT-
MA4, FXM4, FVM4, F5M4, WAPM, WAPL, WAPT, WAHL,
WAHM, WAHT, WAMA, WAXA, WAXL, WAXM, WAXT, WB-
GL, WBHL, REM4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Description of Electric Heater Components . . . . . . . . . . . . . . . . 23
Troubleshooting EHC and EHK Series Electric Heaters. . . . . . . 23
FMA4, WAMA, WAXA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Description of Electric Heater Components . . . . . . . . . . . . . . . . 23
Leak Dissipation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Operation (Models with R-454B Refrigerant) . . . . . . . . . . . . . . . 24
System Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
FF1E, FFMA, FMA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Refrigerant Flow-Control Devices. . . . . . . . . . . . . . . . . . . . . . . . 27
Piston Body Cleaning and Replacement . . . . . . . . . . . . . . . . . . . 28
Aluminum Coil Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Installation - A-Coil Units Only. . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Installation - Slope Coil Units Only. . . . . . . . . . . . . . . . . . . . . . . . . 31

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 the individual instructions packaged with kits or accessories
when installing.
Follow all safety codes. Wear safety glasses, protective clothing and
work gloves. Have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings 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 the Canadian Electrical Code
CSA C22.1.
Service and Maintenance Instructions
Recognize safety information. This is the safety-alert symbol
you see this symbol on the unit and in instruction 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.
WARNING
!
UNIT OPERATION AND SAFERTY HAZARD
Failure to follow this warning could result in personal injury or death.
R-454B systems operate at higher pressures than R-410A systems. Do
not use R-410A service equipment or components on R-454B
equipment. Ensure service equipment is rated for R-454B.
WARNING
!
PERSONAL INJURY AND PROPERTY DAMAGE
HAZARD
Failure to follow this warning could result in property damage, personal
injury, or death.
For continued performance, reliability, and safety, the only approved
accessories and replacement parts are those specified by the equipment
manufacturer. The use of non-manufacturer approved parts and
accessories could invalidate the equipment limited warranty and result
in fire risk, equipment malfunction, and failure. Please review
manufacturer's instructions and replacement part catalogs available
from your equipment supplier.
!
HOT TUBE WARNING
Failure to follow this caution could result in personal injury and/or
property damage.
Refrigerant lines can reach or exceed 130 °F (54 °C). Avoid contact
with the vapor header or vapor line, especially in Heating Mode. Do not
service A2L refrigerant (ex; R-454B) fan coils while these components
are hot to avoid risk of ignition source.

INTRODUCTION

These fan coil units are designed for flexibility in a variety of
applications that meet upflow, horizontal, or downflow requirements.
Units are available in 1-1/2 through 5 ton nominal cooling capacities.
Factory-authorized, field-installed electric heater packages are available
in 3 through 30 kilowatts.
CAUTION
. When