Table of Contents
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FPM(A,B)N(C,U)
FMC4X, FMC4Z,
FMU4X, FMU4Z
Service and Maintenance Instructions
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
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FMC4Z & FMU4Z
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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.
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Horizontal Fan Coil Units
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
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CAUTION. These words are used with the safety−alert symbol.
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DANGER identifies the most serious hazards which will result in
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severe personal injury or death. WARNING signifies hazards
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which could result in personal injury or death. CAUTION is used
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to identify unsafe practices which may result in minor personal
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injury or product and property damage. NOTE is used to highlight
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suggestions which will result in enhanced installation, reliability, or
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operation.
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UNIT OPERATION AND SAFERTY HAZARD
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Failure to follow this warning could result in personal injury
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or death.
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Puron (R−410A) systems operate at higher pressures than
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R−22 systems. Do not use R−22 service equipment or
components on R−410 equipment. Ensure service equipment
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is rated for R−410.
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FPM(A,B)N(C,U), FMC4X, FMC4Z, FMU4X, FMU4Z Fan Coils
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are designed for horizontal orientation and are suitable for ceiling
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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.
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WARNING
INTRODUCTION
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Table of Contents
Troubleshooting
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Summary of Contents for Tempstar FPMN Series
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Page 1: Table Of Contents
FPM(A,B)N(C,U) Horizontal Fan Coil Units FMC4X, FMC4Z, FMU4X, FMU4Z Service and Maintenance Instructions NOTE: Read the entire instruction manual before starting the Recognize safety information. This is the safety−alert symbol installation. When you see this symbol on the unit and in instruction manuals, TABLE OF CONTENTS be alert to the potential for personal injury. -
Page 2: Fan Coil Description And Troubleshooting
FAN COIL DESCRIPTION ELECTRIC HEATER SERVICE AND TROUBLESHOOTING Service can be completed with heater in place. Shut off power before servicing. WARNING A. Limit Switch Refer to Electric Heater Kit Function and Troubleshooting section of this manual. ELECTRICAL OPERATION HAZARD B. -
Page 3: Electric Heater Function And Troubleshooting
ELECTRIC HEATER FUNCTION AND TROUBLESHOOTING This section describes EHK3 series electric heaters by examining functional operation of this heater. Service can be completed with heater in place. Shut off power before servicing. DESCRIPTION OF ELECTRIC HEATER COMPONENTS A. Limit Switch The limit switch is a temperature sensitive control that’s function is to prevent system from overheating in abnormal conditions. - Page 4 7 Blower Support Plate 6 Motor Mount 5 Motor Axle Support Left 4 Motor Holder 8 Capacitor Cover 3 Motor Axle Support Right 9 Capacitor Strap 10 Capacitor 2 Blower Motor 1 Blower Assy(2 pieces) NOTE: This illustration is for reference only. Unit may differ in appearance or may not include all components shown. A180030 Fig.
- Page 5 1 Top Panel Assy 2 Insulation Foam 3 Insulation Bracket 4 Insulation Bracket 5 Condensate baffle Assy 6 Drain pan NOTE: This illustration is for reference only. Unit may differ in appearance or may not include all components shown. A180028 Fig.
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Page 6: Care And Maintenance
NOTE: This illustration is for reference only. Unit may differ in appearance or may not include all components shown. A180051 Fig. 6 − FMU4Z and FMC4Z Models − Blower and Coil Parts CARE AND MAINTENANCE CAUTION The minimum maintenance requirements for this equipment are as follows: UNIT DAMAGE HAZARD Inspect and clean or replace air filter each month or as re-... -
Page 7: Disconnecting The Control Box Assembly
CAUTION WARNING ELECTRICAL OPERATION HAZARD UNIT DAMAGE HAZARD Failure to follow this warning could result in personal injury Failure to follow this caution may result in equipment damage. or death. Do not use caustic household drain cleaners in the condensate Before installation or servicing system, always turn off main pan or near the coil. -
Page 8: Fpm(A,B)N, Fmc4X, Fmu4X Servicing The Fan Motor
A13390 Fig. 12 − Disconnect Ground Wire 2. Remove grounding bracket from motor−mount assembly. At this point, the clamp brackets will be loose and can be removed. A13388 Fig. 10 − Blower Support Plate Screws 6. Remove the two middle screws above/behind the blower motor that’s attached to the top plate. -
Page 9: Fmc4Z & Fmu4Z − Disconnecting The Blower Assembly
6. Disconnect one of the blower housings by removing the WARNING four housing screws. ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in equipment damage or equipment damage. Capacitors can store electrical energy when power is off. Electrical shock can result if you touch the capacitor terminals and discharge the stored energy. - Page 10 6. Remove the two outer screws that attach the blower support plate to right evaporator coil support. (See Fig. 23) A180034 A180031 Fig. 23 − Remove Outer Screws from Support Plate Fig. 20 − Removing Control Box Cover 7. Remove the top and middle screw of the refrigerant tubing 3.
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Page 11: Fmc4Z & Fmu4Z Servicing The Fan Motor
A180037 Fig. 26 − Screws Holding Support Plate A180045 Fig. 28 − Screws Holding the Bracket 9. Remove the two outer screws that attach the blower support plate to left evaporator coil support. (See Fig. 27) This will completely release the blower assembly from the unit. A180046 Fig. -
Page 12: Cleaning The A−Coil
3. Loosen blower−wheel set screws from each motor shaft, ac- 2. Remove the four screws located near the corners. cessing them through the blades of the blower wheels, with (See Fig. 33) a Phillips screwdriver. (See Fig. 16) 3. Lower drain pan from unit. 4. -
Page 13: Refrigerant Metering Device
FPMAN(C,U) Fan coils are shipped with a piston metering device designed for the most common outdoor unit matches. The piston included with the fan coil is unique to this product and cannot be replaced with the piston shipped with the outdoor unit. Refer to AHRI ratings to check if your combination can use the piston shipped with the unit or requires an accessory TXV. - Page 14 Copyright 2018 CAC / BDP D 7310 W. Morris St. D Indianapolis, IN 46231 Edition Date: 03/18 Catalog No: SM-FPMA-03 Replaces: SS-FPMA-02 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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