Service and Maintenance Instructions
Table of Contents
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FAN COIL DESCRIPTION and TROUBLESHOOTING . . . . . . . . 2
PSC FAN MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ELECTRIC HEATER SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . 2
CLEANING OR REPLACING REFRIGERANT
FLOW-CONTROL DEVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SEQUENCE OF OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Control Board (contact FAST for part number). . . . . . . . . . . . . . . 2
FEM4P, FEM4X, FEV, FJM, FXM4, REM4P, REM4X, WAHA,
WAPM, WAPT, WAPL, WAHM, WAHT, WAHL, WAXM, WAXT,
WAXL, WBHL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
MULTI-SPEED ECM FAN MOTOR . . . . . . . . . . . . . . . . . . . . . . 4
FVM4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
FMA4P, WAMA, FMA4X, WAXA . . . . . . . . . . . . . . . . . . . . . . 15
FAN MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
ELECTRIC HEATER SERVICE . . . . . . . . . . . . . . . . . . . . . . . . 16
SEQUENCE OF OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . 16
CLEANING OR REPLACING REFRIGERANT
FLOW-CONTROL DEVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SEQUENCE OF OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . 17
ELECTRIC HEATER FUNCTION AND
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
FCM4, FEM4, FEV, FJM, FSA4, FXM4, FVM4, REM4, WAPM,
WAPT, WAPL, WAHM, WAHT, WAHL, WAXM, WAXT, WAXL,
WBHL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
FMA4, WAMA, WAXA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
FCM4, FEM4, FEV, FJM, FXM4, FVM4, WAP, WAH, WAX,
WBHL, REM4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
FSA4, FMA4, WAMA, WAXA . . . . . . . . . . . . . . . . . . . . . . . . . 23
Refrigerant Flow-Control Devices. . . . . . . . . . . . . . . . . . . . . . . . 24
Aluminum Coil Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Coil & Condensate Pan Removal and Replacement . . . . . . . . . . 26
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.
Recognize safety information. This is the safety-alert symbol . When
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.
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 5kW @ 240VAC through 30kW @ 240VAC single phase selections
and 3-phase selections.
FCM4, FEV, FEM4, FJM, FMA4, FSA4, FSM4, FSU4,
FVM4, FXM4, REM4, WAH, WAM, WAP, WAX, WBHL
Vertical/Horizontal/Multi-Position Fan Coil Units
CAUTION
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this caution may result in equipment damage,
improper operation or personal injury.
When coils are pressurized with nitrogen, open the suction port first to
release the nitrogen. Mesh screens may dislodge if the liquid line is
opened first.
WARNING
!
UNIT OPERATION AND SAFERTY HAZARD
Failure to follow this warning could result in personal injury or death.
R-410A systems operate at higher pressures than R-22 systems. Do not
use R-22 service equipment or components on R-410 equipment.
Ensure service equipment is rated for R-410A.
WARNING
!
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing or servicing 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.
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