International Comfort Products FEM4X1800, FEM4X2400, FEM4X3000, FEM4X3500, FEM4X3600 Installation Manual
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INSTALLATION INSTRUCTIONS
Fan Coils
FEM4X, FSM4X, FSU4X, FXM4X
These instructions must be read and understood completely before attempting installation.
Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and
NOTE
The signal words DANGER, WARNING,
CAUTION, and NOTE are used to identify levels of
hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate
hazard. The signal words WARNING, CAUTION,
and NOTE will be used on product labels and
throughout this manual and other manuals that may
apply to the product.
DANGER -- Immediate hazards which will result in
severe personal injury or death.
WARNING -- Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION -- Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE -- Used to highlight suggestions which will
result in enhanced installation, reliability , or
operation.
Signal Words in Manuals
The signal word WARNING is used throughout this
manual in the following manner:
WARNING
!
The signal word CAUTION is used throughout this
manual in the following manner:
!
Signal Words on Product Labeling
Signal words are used in combination with colors
and/or pictures on product labels.
WARNING
CAUTION
TABLE OF CONTENTS
Introduction 1....................................
Location 2.......................................
Clearances 2....................................
Heater Packages 2...............................
Position Unit 2...................................
Air Ducts 7......................................
Electrical Connections 7..........................
Refrigerant Tubing 1 1.............................
Refrigerant Metering Device 1 1....................
Condensate Drains 1 1............................
Accessories 12..................................
Sequence of Operation 12.........................
Start--up Procedure 13............................
Care and Maintenance 13.........................
Airflow Performance 15...........................
R--410A Quick Reference Guide 18.................
!
PERSONAL INJURY, AND/OR PROPERTY DAMAGE
HAZARD
Failure to carefully read and follow this warning could
result in equipment malfunction, property damage,
personal injury and/or death.
Installation or repairs made by unqualified persons
could resultin equipmentmalfunction, property damage, personal injury and/or death.
The information contained in this manual is intended
for use by a qualified service technician familiar with
safety procedures and equipped with the proper
tools and test instruments.
Installation must conform with local building codes
and with the National Electrical Code NFPA70 current
edition.
WARNING
INTRODUCTION
Models FEM4X, FSM4X, and FXM4X are designed for
maximum flexibility and can be used for upflow, horizontal left
or right, and downflow applications (accessory kit required
for downflow or horizontal right).
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INSTALLA TION INSTRUCTIONS Fan Coils: FEM4X, FSM4X, FSU4X, FXM4X
Model FSU4X is designed for upflow installation, and can be
field modified for downflow and horizontal left or right
applications (accessory kits required for downflow or
horizontal).
FEM4X and FXM4X models are available for system sizes
1--1/2 -- 5 tons (18,000 -- 60,000 BTUH) nominal cooling
capacity.
FSM4X, and FSU4X models are available for system size 5
ton (60,000 BTUH) nominal cooling capacity.
FEM4X and FXM4X models use an ECM motor and have a
factory installed and appropriately sized hard shut--off TXV
metering device and are for R--410A refrigerant ONLY.
FSM4X and FSU4X models use a PSC motor and have a
factory installed and appropriately sized hard shut--off TXV
metering device and are for R--410A refrigerant ONLY.
Factory approved electric heater packages are available in
sizes 3kW through 30kW. See Product Specification
literature for available accessory kits.
LOCATION
Select the best position which suits the installation site
conditions. The location should provide adequate structural
support, space in the front of the unit for service access,
clearance for return air and supply duct connections, space
for refrigerant piping connections and condensate drain line
connections. If heaters are being installed make sure
adequate clearance is maintained from supply duct work.
Nuisance sweating may occur if the unit is installed in a high
n these installations a
humidity environment with low airflow
wrap
of 2(51mm) fiberglass insulation with a vapor barrier is
recommended.
REQUIRED CLEARANCES -- ALL MODELS (inches)
No
Heaters
With
Heaters
All Sides 0
From Supply Duct 0
All Sides 0
From First 3 feet of Supply Duct to Combustibles
From Supply Duct to Combustibles after 3 feet
NOTE: Internal filter can be accessed from separate filter
door. If the filter can NOT be easily accessed, a remote filter
is recommended. Refer to ACCA Manual D for remote filter
sizing.
. O
1
0
POSITION UNIT
Unit can stand or lie on floor, or hang from ceiling or wall.
Allow space for wiring, piping, and servicing unit.
!
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property
damage
A field fabricated auxiliary drain pan, with a separate
drain is REQUIRED for all installations over a finished living spaceor in any area that may be damaged
by overflow from a restricted main drain pan. In some
localities, local codes require an auxiliary drain pan
for ANY horizontal installation.
A. UPFLOW INSTALLATION
If return air is to be ducted through a floor, set unit on floor
over opening and use 1/8 to 1/4 inch thick (3 to 6 mm thick)
fireproof resilient gasket between duct, unit, and floor.
Side return is a field option on slope coil models. Cut opening
per dimensions shown in Figure 2. A field--supplied bottom
closure is required.
B. MODULAR UNITS
The FSU4X6000, FXM4X4800/6000, FEM4X4800/6000,
and FSM4X4800/6000 fan coils are two--piece modular
units. This allows for modular units to be disassembled and
components moved separately to installation area for
reassembly. This process accommodates small scuttle holes
and limiting entrances to installation sites (refer to Figure 1).
Figure 1
CAUTION
Modular Unit Assembly
BLOWER BOX
!
FIRE HAZARD
Failure to maintain proper clearances could result in personal injury, death, and/or property damage.
When heaters are installed, maintain clearances from
combustible materials as specified on unit rating plate.
Do not use plastic lined or combustible flexible ducting
within 36 inches (1m) of the supply end of the fan coil.
HEATER PACKAGES
WARNING
2 SCREWS
REAR CORNER
BRACKET
2 SCREWS
2 SCREWS
COIL BOX
Factory approved, field installed, UL listed heater packages
are available from the equipment supplier. See unit rating
plate for a list of factory approved heaters. Heaters that are
not factory approved could cause damage which would not
be covered under the equipment warranty.
2 496 01 5402 04
INSTALLA TION INSTRUCTIONS Fan Coils: FEM4X, FSM4X, FSU4X, FXM4X
Figure 2 Upflow Installation
POWER ENTRY
OPTIONS
FRONT SERVICE CLEARANCE
60 model = 24” (610 mm)
A--COIL
UNITS
UPFLOW/DOWNFLOW
SECONDARY DRAIN
UPFLOW/DOWNFLOW
PRIMARY DRAIN
UPFLOW/DOWNFLOW
SECONDARY DRAIN
UPFLOW/DOWNFLOW
PRIMARY DRAIN
1--1/2”
19” (483mm)
2 --- 1 / 2 ”
(64mm)
FIELD SUPPLIED
SUPPLY DUCT
LOW VOLT
ENTRY
OPTIONS
FIELD MODIFIED
SIDE RETURN
A
LOCATION FOR
SLOPE COIL
UNITS ONLY
FIELD SUPPLIED
RETURN PLENUM
SLOPE COIL UNITS
FEM4X
MODEL SIZE
18 12"
24
30
17" (432mm)
17" (432mm)
35 19" (483mm)
SLOPE COIL UNITS
FXM4X
MODEL SIZE
18 17"
24
30
17" (432mm)
19" (483mm)
A
(305mm)
A
(432mm)
B. DOWNFLOW INSTALLATION
!
CAUTION
PRODUCT OR PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or
property damage
The conversion of the fan coil to downflow requires
special proceduresfor the condensatedrains on both
A--coil and Slope --coil units. The vertical drains have
an overflow hole between the primary and secondary
drain holes. This hole is plugged for all applications
except downflow, and must be used for downflow.
Failure to follow instructions could result in personal
injury or product and property damage.
In this application, field conversion of the evaporator coil is
required using accessory Downflow Kit along with an
accessory Base Kit. Set unit on floor over opening and use
1/8” to 1/4” thick fireproof resilient gasket between duct, unit,
and floor. Refer to installation instructions packaged with
accessory kit. See Product Specification literature for kit part
numbers.
During the conversion process, removed the plastic cap
covering the vertical drains only and discard.
Remove the plug from the overflow hole and discard.
At completion of the downflow installation, caulk around the
vertical pan fitting to door joint to retain low air leak
performance of the unit.
NOTE: Gasket kit number (EBAC01GSK) is also required for
all downflow applications to maintain low air leak/low sweat
performance.
C. HORIZONTAL INSTALLATION
Unit must NOT be installed with access panels facing up or
down. Access panels must only face to the side.
FEM4X, FSM4X, and FXM4X models are factory built for
horizontal left installation (refer to Figure 3 and Figure 4).
They can be field converted to horizontal right (accessory
Gasket Kit required, see Product Specification literature for
part number). Refer to Figure 5 and Figure 6.
FSU4X models require accessory kits for any horizontal
installation (see Product Specification literature for required
accessory kits).
NOTE: When suspending unit from ceiling, dimples in casing
indicate suitable location of screws for mounting metal
support straps.
NOTE: For optimum condensate drainage performance in
horizontal installations, unit should be leveled along its length
and width.
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INSTALLA TION INSTRUCTIONS Fan Coils: FEM4X, FSM4X, FSU4X, FXM4X
Figure 3 Horizontal Left Application (Slope Coil) (FXM4X factory configuration)
A-- COIL
HORIZONTAL LEFT
FIELD
SUPPLIED
LOW VOLT
ENTRY
OPTIONS
HANGING
STRAPS
SECONDARY
DRAIN
SECONDARY
DRAIN
FRONT SERVICE CLEARANCE
(FULL FACE OF UNIT)
18 -- 48 models = 21” (533mm)
60 model = 24” (610mm)
1-- 3/4” (45mm)
FILTER ACCESS
CLEARANCE
PRIMARY
DRAIN
POWER
ENTRY
OPTIONS
PRIMARY
DRAIN
Figure 4 Horizontal Left Application (A --Coil) (FEM4X, FSM4X, and FXM4X factory configuration)
A
FACTORY SHIPPED
HORIZONTAL LEFT
APPLICATION
B
C
BRACKET
HORIZONTAL
DRAIN PAN
AIR SEAL
ASSEMBLY
REFRIGERANT
CONNECTIONS
HORIZONTAL LEFT
COIL
BRACKET
COIL
SUPPORT
RAIL
DRAIN PAN
SUPPORT
BRACKET
COIL
PRIMARY DRAIN
SECONDARY DRAIN
HORIZONTAL LEFT
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INSTALLA TION INSTRUCTIONS Fan Coils: FEM4X, FSM4X, FSU4X, FXM4X
Horizontal Right Conversion of Units With Slope Coils
1. Remove blower and coil access panel and fitting panel
(refer t o Figure 5).
2. Remove coil mounting screw securing coil assembly
to right side casing flange.
3. Remove coil assembly.
4. Lay fan coil unit on its right side and reinstall coil assembly
with condensate pan down (refer to Figure 5).
5. Attach coil to casing flange using coil mounting screw
previously removed.
6. Align holes with tubing connections and condensate
pan connections, and reinstall access panels and
fitting panel. After brazing, make sure liquid and
suction tube grommets are in place to prevent air
leaks and cabinet sweating.
Figure 5
COIL SUPPORT RAIL
SLOPE COIL
Horizontal Right Conversion Applications (Slope Coil) (FXM4X)
COIL MOUNTING
SCREW
DRAINPAN
REFRIGERANT
CONNECTIONS
Horizontal Right Conversion of Units With A--Coils
1. Remove blower and coil access panel and fitting panel
(refer t o Figure 6).
2. Remove coil mounting screw securing coil assembly
to right side casing flange.
3. Remove coil assembly.
4. Lay fan coil unit on its right side and reinstall coil
assembly with condensate pan down (refer to
Figure 6).
5. Remove horizontal drain pan support bracket from coil
support rail on left side of unit and reinstall on coil
support rail on right side of unit.
6. Convert air--seal assembly for horizontal right (refer to
Figure 6).
a. Remove air-- seal assembly from coil by removing 4
screws.
b. Remove coil drip flanges from A--coil and reinstall on
right side of coil (same side as horizontal drain pan).
c. Remove filler plate (A) and install air splitter (B) in
place of filler plate.
BLOWER
ASSEMBLY
PRIMARY DRAIN
SECONDARY DRAIN
d. Install filler plate (A) as shown in horizontal right
application.
e. Remove condensate troughs (C) and install on
opposite tube sheets.
f. Install hose onto plastic spout.
7. Install horizontal pan on right side of coil assembly.
8. Slide coil assembly into casing. Be sure coil bracket on
each corner of vertical pan engages coil support rails.
9. Reinstall 2 snap--in clips to correctly position and
secure coil assembly in unit. Be sure clip with large
offsets is used on right side of unit to secure horizontal
pan.
10. Remove 2 oval coil access panel plugs and reinstall
into holes on left side of coil access panel and fitting
panel.
1 1. Remove insulation knockouts on right side of coil
access panel
12. Reinstall access fitting panels, aligning holes with
tubing connections and condensate pan connections.
Be sure to reinstall metal clip between fitting panel and
vertical condensate pan.
13. After brazing, make sure liquid and suction tube
grommets are in place to prevent air leaks and cabinet
sweating.
496 01 5402 04 5
INSTALLA TION INSTRUCTIONS Fan Coils: FEM4X, FSM4X, FSU4X, FXM4X
Figure 6 Horizontal Right Conversion Applications (A--Coil)
A
COIL
SUPPORT
RAIL
COIL
BRACKET
DRAIN PAN
SUPPORT
BRACKET
COIL
SUPPORT
RAIL
COIL
BRACKET
HORIZONTAL
DRAIN PAN
PRIAMRY DRAIN
HORIZONTAL RIGHT
SECONDARY DRAIN
HORIZONTAL RIGHT
REFRIGERANT
CONNECTIONS
AIR SEAL
ASSEMBLY
HORIZONTAL
RIGHT
APPLICATION
B
C
D. MANUFACTURED HOUSING AND MOBILE HOME
APPLICATIONS
1. Fan coil unit must be secured to the structure using
field--supplied hardware.
2. Allow a minimum of 24 inches (610mm) clearance
from access panels.
3. Recommended method of securing for typical
applications:
a. If fan coil is away from wall, attach pipe strap to top
of fan coil using No. 10 self tapping screws. Angle
strap down and away from back of fan coil, remove
all slack, and fasten to wall stud of structure using
5/16” lag screws. Typical both sides of fan coil.
b. If fan coil is against wall, secure fan coil to wall stud
using 1/8” (3mm) wide right--angle brackets. Attach
brackets to fan coil using No. 10 self tapping screws
and to wall stud using 5/16” lag screws (refer to
Figure 7).
NOTE: Modular units can be disassembled and
components moved separately to installation area
for reassembly. This process accommodates small
scuttle holes and limiting entrances to installation
sites (refer to Figure 8).
Figure 7
Mobile Home or Manufactured Hous-
ing Applications
4” (102mm) MAX
SECURE FAN COIL TO STRUCTURE
UNIT AWAY FROM WALL
PIPE STRAP
(TYPICAL BOTH SIDES)
OR
UNIT AGAINST WALL
11/8” (3mm) INCH THICK
ANGLE MOUNTING BRACKET
(TYPICAL BOTH SIDES)
DOWN FLOW
BASE KIT
SECURE UNIT TO FLOOR
ANGLE BRACKET OR PIPE STRAP
4” (102mm) MAX
6 496 01 5402 04
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