Tempstar FMC4X, Service And Maintenance Instructions

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FPM(A,B)N(C,U)
FMC4X, FMC4Z,
FMU4X, FMU4Z
Service and Maintenance Instructions
Horizontal Fan Coil Units
NOTE
: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FAN COIL DESCRIPTION AND TROUBLESHOOTING 2 . . . . . . . .
MULTI − SPEED ECM FAN MOTOR 2 . . . . . . . . . . . . . . . . . . . . . . . . .
FAN SPEED SELECTION 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FAN MOTOR 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRIC HEATER SERVICE 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CLEANING OR REPLACING
REFRIGERANT FLOW − CONTROL DEVICE 2 . . . . . . . . . . . . . . . . .
SEQUENCE OF OPERATION 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRIC HEATER FUNCTION
AND TROUBLESHOOTING
3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CARE AND MAINTENANCE 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Filter 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling Coil, Drain Pan, and Condensate Drain 6 . . . . . . . . . . . . .
Disconnecting the Control Box Assembly 7 . . . . . . . . . . . . . . . . . .
FPM(A,B)N, FMC4X, FMU4X
Disconnecting the Blower Assembly 7 . . . . . . . . . . . . . . . . . . . . . .
FPM(A,B)N, FMC4X, FMU4X
Servicing the Fan Motor 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FMC4Z & FMU4Z
Disconnecting the Blower Assembly 9 . . . . . . . . . . . . . . . . . . . . . .
FMC4Z & FMU4Z
Servicing the Fan Motor 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning the A − Coil 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Drain Pan 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing the A − Coil 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Metering Device 13 . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
UNIT OPERATION AND SAFERTY HAZARD
Failure to follow this warning could result in personal injury
or death.
Puron (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 − 410.
!
WARNING
INTRODUCTION
FPM(A,B)N(C,U), FMC4X, FMC4Z, FMU4X, FMU4Z Fan Coils
are designed for horizontal orientation and are suitable for ceiling
installations. The FPM(A,B)NC, FMC4X, FMC4Z models are
cased and configured from the factory for bottom return
applications. FPM(A,B)NU, FMU4X, FMU4Z models are
uncased. All units are available with field − installed electric heat.
Units are used indoors as the fan coil for split − system heat pumps
or air conditioners.
FPMAN(C,U) units are factory
− equipped with a piston refrigerant
metering device and are available in 18,000 through 36,000 Btuh
nominal cooling capacities. FPMBN(C,U), FMC4X, FMU4X,
FMC4Z, FMU4Z are factory − equipped with a TXV refrigerant
metering device and are available in 18,000 through 30,000 Btuh
nominal cooling capacities.
The coil is equipped with sweat
− type connections and is
vapor − charged 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.