International comfort products FEM4 Service And Maintenance Instructions
  1. Manuals
  2. Brands
  3. International comfort products Manuals
  4. Fan
  5. FEM4
  6. Service and maintenance instructions

International comfort products FEM4 Service And Maintenance Instructions

Vertical/horizontal/multi−position fan coil units
Hide thumbs
Table of Contents

Advertisement

Quick Links

SERVICE AND MAINTENANCE INSTRUCTIONS
VERTICAL/HORIZONTAL/MULTI−POSITION FAN COIL UNITS
FEM4, FCM4, FSA4, FEA4, FSM4, FSU4, FXM4, FVM4, FMA4,
NOTE: Read the entire instruction manual before starting the
installation.

TABLE OF CONTENTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FEM4P, FEM4X, FXM4X, FEA4X, WAHA, WAPM,
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WAPT, WAPL, WAHM, WHAT, WAHL, WAXM,
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SAFETY CONSIDERATIONS

Improper
installation,
adjustment,
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.
WAH, WAP, WAM, WAX, REM4
PAGE
. . . . . . . . . . . . . . . . . . . . . . . .
. .
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . .
. . . .
. . . . . . . . . .
. . . . . . . . . . . . . . .
. . . . . . . . . . . .
. . . . . . . . . . . . . . .
alteration,
service,
Specifications subject to change without notice.
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
1
symbol. DANGER identifies the most serious hazards which
will result in severe personal injury or death. WARNING
1
signifies hazards which could result in personal injury or
1
death. CAUTION is used to identify unsafe practices which
1
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.
5
!
6
12
UNIT OPERATION AND SAFETY HAZARD
17
Failure to follow this caution may result in equipment
damage, improper operation or personal injury.
21
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.
21
21
!
22
UNIT OPERATION AND SAFERTY HAZARD
Failure to follow this warning could result in personal
22
injury or death.
23
R−410A systems operate at higher pressures than R−22
systems. Do not use R−22 service equipment or
24
components on R−410 equipment. Ensure service
24
equipment is rated for R−410A.
25

INTRODUCTION

25
These fan coil units are designed for flexibility in a variety of
27
applications that meet upflow, horizontal, or downflow
requirements. Units are available in 1−1/2 through 5 ton
nominal
cooling
field−installed electric heater packages are available in 5kW
@ 240Vac through 30kW @240Vac.
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.
CAUTION
WARNING
capacities.
Factory−authorized,
496 08 8001 00 2/17/2014

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the FEM4 and is the answer not in the manual?

Questions and answers

Related Manuals for International comfort products FEM4

Summary of Contents for International comfort products FEM4

  • Page 1: Table Of Contents

    SERVICE AND MAINTENANCE INSTRUCTIONS VERTICAL/HORIZONTAL/MULTI−POSITION FAN COIL UNITS FEM4, FCM4, FSA4, FEA4, FSM4, FSU4, FXM4, FVM4, FMA4, WAH, WAP, WAM, WAX, REM4 NOTE: Read the entire instruction manual before starting the Recognize safety information. This is the safety−alert symbol installation.
  • Page 2 SERVICE AND MAINTENANCE FAN COILS FAN COIL DESCRIPTION There will be a time delay. This completed circuit energizes all heating elements HTR and blower motor. AND TROUBLESHOOTING B. Heat Pump PSC FAN MOTOR COOLING FSM4, FSU4, FSA4 On a call for cooling, the thermostat makes circuits R−O, R−Y, and R−G.
  • Page 3 SERVICE AND MAINTENANCE FAN COILS NOTE: Unused fan speed leads must be capped or taped off NOTE: Electric heaters are factory wired with all stages tied to prevent direct short to cabinet surface. together. If independent staging is desired, consult outdoor thermostat installation instructions, or corporate thermostat 2.
  • Page 4 SERVICE AND MAINTENANCE FAN COILS IF TRANSFORMER HAS VOLTAGE APPLIED TO IT: rating allows. When fuse blows because of high voltage, the system has mixed high− and low−voltage signals. Check low−voltage transformer leads R (red) and C (brown). Make sure they are wired to correct location. Check wiring of sequencers/relays as shown in The unit will not function without proper connections.

  • Page 5: Wapt, Wapl, Wahm, Waht, Wahl, Waxm

    SERVICE AND MAINTENANCE FAN COILS FEM4P, FEM4X, FEA4X, FXM4, WAHA, WAPM, To change motor speeds disconnect the BLUE fan lead from motor connector terminal No. 2 (factory default position) and WAPT, WAPL, WAHM, WAHT, WAHL, WAXM, move to desired speed-tap; 1, 2, 3, or 5. WAXT, WAXL, REM4P, REM4X Speed-taps 1, 2, and 3 have a 90−second blower off time MULTI−SPEED ECM FAN MOTOR...

  • Page 6: Fvm4X

    SERVICE AND MAINTENANCE FAN COILS Figure 4 − FVM4 motor/ECM 5.0 Motor A13028 FVM4 control power circuit is connected by printed circuit runs to motor Connector −Pins 9, 10, and 11 then through motor Constant Air Flow control harness to motor. Unlike fan coils using induction motors where static pressure Low−Voltage Circuit Fusing and Reference affects airflow, these fan coils are constant airflow units.
  • Page 7 SERVICE AND MAINTENANCE FAN COILS screw terminals. Twenty−one pin terminals comprise field Thermostat closes circuits R to G, R to Y/Y2 and R to O (heat select taps for motor. pump only). A circuit R to Y1 is required for two−speed high operation.
  • Page 8 SERVICE AND MAINTENANCE FAN COILS Figure 6 − Easy Select Board Schematic SYSTEM DIAGRAM HEATER/MOTOR SEC1 SEC2 5 AMP AUX1 " HUM1 " AUX2 " HUM2 " " DIODE LOGIC AUX HEAT AC/HP SYSTEM AC/HP CFM ON/OFF CONTINUOUS KW/CFM SIZE TYPE ADJUST DELAY...
  • Page 9 SERVICE AND MAINTENANCE FAN COILS EASY SELECT CONFIGURATION TAPS E. ON/OFF Delay NOTE: ON/OFF Delay is active only in cooling and heat The Easy Select taps are used by installer to configure pump only heating modes. In auxiliary heat mode or system.
  • Page 10 SERVICE AND MAINTENANCE FAN COILS which initiates Superdehumidification and reduces the airflow Airflow Too High: to 50 percent of cooling. Wrong Easy Select Board selection. Fan coil is factory set for HEATING the largest outdoor unit and largest electric heater. Select sizes that are actually installed.
  • Page 11 SERVICE AND MAINTENANCE FAN COILS Use following procedure to check low voltage signals: Check Table 4 for pin number on 16−pin connector associated with the Y/Y2 signal. The correct pin is No. The ECM motor in these fan coils receive low voltage signals 14.

  • Page 12: Fcm4X

    SERVICE AND MAINTENANCE FAN COILS Figure 7 − Humidistat Wiring for De−Humidify Mode TROUBLESHOOTING NOTE: Always check high and low voltage supply to the fan coil components. Check the integrity of the plug receptacle EASY SELECT BOARD TERMINAL connections and fan coil wiring harness prior to assuming a BLOCK component failure.
  • Page 13 SERVICE AND MAINTENANCE FAN COILS Check system wiring to be sure Observer wall control is ECM Motor Troubleshooting powered and connections are made DX+ to DX+, DX− to The ECM motor used in this product consists of two parts: the DX−, etc.
  • Page 14 SERVICE AND MAINTENANCE FAN COILS Fan Coil Troubleshooting Shorted or mis−wiring of the low voltage motor harness wiring will not cause damage to fan coil control or to motor control Fan coil faults indicated by flashing codes on the amber module.
  • Page 15 SERVICE AND MAINTENANCE FAN COILS NOTE: Fan coil control will not operate electric heater until section E, Emergency Heating and Cooling Modes). No further fan coil troubleshooting information will be available at this Status Code is resolved. If the heater size is set through Observer wall control...
  • Page 16 SERVICE AND MAINTENANCE FAN COILS certain emergency situations described in the Start Up and is not important. You could see even more fluctuation Troubleshooting sub−section. depending on the voltmeter used. The Observer wall control uses temperature; humidity and Figure 9 − FCM4 Circuit Board LED Locations other data supplied from indoor and outdoor system components to control heating or cooling system for optimum comfort.

  • Page 17: Fma4P, Fma4X, Wama Waxa

    SERVICE AND MAINTENANCE FAN COILS FMA4P, WAMA, FMA4X, WAXA D. Fan Relay Relay coil is 24−V. Check for proper control voltage. Replace WARNING relay if faulty. CLEANING OR REPLACING REFRIGERANT ELECTRICAL OPERATION HAZARD FLOW−CONTROL DEVICE Failure to follow this warning could result in personal FMA4P, WAMA injury or death.
  • Page 18 SERVICE AND MAINTENANCE FAN COILS Figure 11 − FMA4, WAMA, WAXA (sizes 18 & 24) Expanded View− Case 18K & 24K Case A13135B Figure 12 − FMA4, WAMA, WAXA (sizes 18 & 24) Expanded View− Duct Components, Blower & Electrical Parts A13136 Specifications subject to change without notice.
  • Page 19 SERVICE AND MAINTENANCE FAN COILS Figure 13 − FMA4, WAMA, WAXA (sizes 18 & 24) Expanded View− Evaporator Parts & Drain Pan (FMA4X & WAXA use TXV, not shown) A13137B Figure 14 − FMA4, WAMA, WAXA (sizes 30 & 36) Expanded View− Case A13138B Specifications subject to change without notice.
  • Page 20 SERVICE AND MAINTENANCE FAN COILS Figure 15 − FMA4, WAMA, WAXA (sizes 30 & 36) Expanded View− Duct Components, Blower & Electrical Parts A13139 Figure 16 − FMA4, WAMA, WAXA (sizes 30 & 36) Expanded View− Evaporator Parts & Drain Pan A13140 Specifications subject to change without notice.

  • Page 21: Electric Heater Function And Troubleshooting

    Control voltage input to PCB should be 24Vac. TROUBLESHOOTING Output to relay should be 18−Vdc minimum. If input is FEM4, FCM4, FSA4, FEA4, FXM4, FVM4, present but no output, replace PCB. If output is present, replace relay. WAPM, WAPT, WAPL, WAHM, WAHT, WAHL,...

  • Page 22: Care And Maintenance

    CARE AND MAINTENANCE Rinse coil thoroughly with clear water. Be careful not to splash water on insulation. FEM4, FCM4, FXM4, FVM4, WAP, WAH, Inspect drain pan and condensate drain at the same time WAX, REM4 cooling coil is checked. Clean drain pan and condensate To continue high performance, and minimize possible drain by removing any foreign matter from pan.

  • Page 23: Fsa4X, Fea4X, Fma4P, Fma4X, Wama, Waxa

    SERVICE AND MAINTENANCE FAN COILS weights (clips) on blower−wheel vanes. Also, do not B. Cooling Coil, Drain Pan, and Condensate Drain drop or bend wheel, as balance will be affected. The cooling coil is easily cleaned when it is dry. Inspect coil To reassemble blower: and clean (if necessary) before each cooling season.

  • Page 24: Refrigerant Flow−Control Device

    SERVICE AND MAINTENANCE FAN COILS position wheel along shaft to position marked during Secure motor mount to blower housing using bolts disassembly. previously removed. NOTE: If previous shaft was not marked or if replacing Attach green wire to blower housing with screw. previous motor, set blower wheel position by sliding blower Connect electrical and capacitor leads to original wheel along motor shaft to 1−1/8−in.

  • Page 25: Piston Body Cleaning And Replacement

    SERVICE AND MAINTENANCE FAN COILS evaporator pressure which is transferred via the CAUTION equalizer tube to underside of diaphragm, with which the pin carrier spring pressure closes valve. The UNIT DAMAGE HAZARD refrigerant flow is effectively stabilized to load demand with negligible change in superheat.
  • Page 26 SERVICE AND MAINTENANCE FAN COILS Disconnect liquid and vapor tubes from indoor coil. Use before vapor pressure reaches 5 psig (35kPa). If this occurs, a tubing cutter to cut tubes. turn off electrical supply to outdoor unit immediately, front seat vapor service valve, and recover any remaining refrigerant.

  • Page 27: R−410A Quick Reference Guide

     Do not vent R−410A into the atmosphere.  Observe all warnings, cautions, notes and bold text.  Do not use R−22 TXV Copyright 2014 International Comfort Products Lewisburg, TN 37091 USA Specifications subject to change without notice. 496 08 8001 00...

This manual is also suitable for:

Fcm4Fsa4Fea4Fsm4Fsu4Fxm4 ... Show all

Table of Contents