ICP FXM4X4800A1 Installation Guide
INSTALLATION INSTRUCTIONS
Fan Coils
FEM4X, FEM4P, REM4X, 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:
!
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 2...............................
LOCATION 2....................................
HEATER PACKAGES 2...........................
AIR DUCTS 7...................................
ELECTRICAL CONNECTIONS 7..................
REFRIGERANT TUBING 10........................
REFRIGERANT FLOW- CONTROL DEVICE 10......
REFRIGERANT METERING DEVICE 11.............
CONDENSATE DRAINS 11........................
ACCESSORIES 12................................
SEQUENCE OF OPERATIONS 13..................
START- UP PROCEDURE 13......................
CARE AND MAINTENANCE 13.....................
AIRFLOW PERFORMANCE TABLES 14.............
R- 410A QUICK REFERENCE GUIDE 17............
!
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
result in equipment malfunction, 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
496 01 5503 01 4/20/18Specifications are subjec t to change without notice.
INSTALLA TION INSTRUCTIONS Fan Coils: FEM4X, FEM4P, REM4X, FXM4X
INTRODUCTION
Models FEM4X, FEM4P, and REM4X are for R- 410A
refrigerant and can be used for upflow, horizontal left or right,
and downflow applications (accessory kit required for
downflow). FEM and FXM units aredesigned to meet cabinet
air leakage of less than 2% at 0.5 inches W.C. and cabinet
air leakage less than 1.4% at 0.5 inches W.C. when tested
in accordance with ASHRAE 193 standard.
FEM4P models are available for system sizes 1- 1/2 - 4 tons
(18,000 - 48,000 BTUH) nominal cooling capacity. FEM4P
use a refrigerant piston metering device with an ECM.
FEM4X and FXM models are available for system sizes
1- 1/2 - 5 tons (18,000 - 60,000 BTUH) nominal cooling
capacity. All 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.
REM4X models are available for system sizes 1- 1/2 through
5 tons (18,000 - 60,000 BTUH) nominal cooling capacity. All
models use an ECM motor and have a factory- installed and
appropriately sized hard shut- off R- 410A TXV metering
device used for R- 410A refrigerant ONLY.
FEM and REM models require a field supplied air filter.
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
humidity environment with low airflow. On these installations a
wrap of 2” (51mm) fiberglass insulation with a vapor barrier is
recommended.
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.
requirements of less than 2% cabinet leakage rate at 0.5
inches W.C. and 1.4% cabinet leakage rate at 0.5 inches
W.C. when tested in accordance with ASHRAE 193
standard.
NOTE: FEM Units that require a kit to meet low leak
requirements have a gasket kit automatically included with
shipment.
Table 1 - Gasket Kit Requirement
Unit Size
018 Yes Yes
024 Yes Yes
030 Yes Yes
036 Yes Yes
042 Yes Yes
048 No Yes
060 No No
See Clearances
REQUIRED CLEARANCES - ALL MODELS inches
No
Heaters
With
Heaters
From First 3 feet of Supply Duct to
From Supply Duct to Combustibles
FEM - Kit Needed ? FXM - Kit Needed?
(mm)
All Sides 0
From Supply Duct 0
All Sides 0
Combustibles
after 3 feet
1 (25)
0
HEATER PACKAGES
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.
POSITION UNIT
Unit can stand or lie on floor, or hang from ceiling or wall.
Allow space for wiring, piping, and servicing unit.
!
FIRE HAZARD
Failure to maintain proper clearances could result inpersonal
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
of the supply end of the fan coil.
Refer to Table 1. Install the FEM fan coil with the
accompanying kit to ensure compliance with low leak
2 496 01 5503 01
WARNING
!
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
space or 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.
Specifications are subjec t to change without notice.
CAUTION
INSTALLA TION INSTRUCTIONS Fan Coils: FEM4X, FEM4P, REM4X, FXM4X
Figure 1 Modular Unit Assembly
BLOWER BOX
2 SCREWS
REAR CORNER
BRACKET
2 SCREWS
2 SCREWS
COIL BOX
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.
SLOPE COIL UNITS
MODEL A
FEM18, REM18 12” (305mm)
FXM18, FEM24, FXM24, REM24,
FEM30, REM30, FEM36, REM36
17” (432mm)
FXM30 19” (483mm)
B. MODULAR UNITS
FEM4X6000B, REM4X6000B, and FXM4X4800/6000 fan
coils are two- piece modular units. This allows for modular
units to be disassembled andcomponents moved separately
to installation area for reassembly. This process
accommodates small scuttle holes and limiting entrances to
installation sites (Figure 1).
Figure 2
POWER ENTRY
OPTIONS
FRONT SERVICE CLEARANCE
18 - 48 models = 21” (533 mm)
60 model = 24” (610 mm)
A- COIL
UNITS
UPFLOW/DOWNFLOW
SECONDARY DRAIN
UPFLOW/DOWNFLOW
PRIMARY DRAIN
UPFLOW/DOWNFLOW
SECONDARY DRAIN
Upflow Installation
1½”
19” (483mm)
2½”
(64mm)
FIELD SUPPLIED
SUPPLY DUCT
LOW VOLT
ENTRY
OPTIONS
FIELD MODIFIED
SIDE RETURN
A
LOCATION FOR
SLOPE COIL
UNITS ONLY
UPFLOW/DOWNFLOW
PRIMARY DRAIN
496 01 5503 01 3
Specifications are subjec t to change without notice.
FIELD SUPPLIED
RETURN PLENUM
INSTALLA TION INSTRUCTIONS Fan Coils: FEM4X, FEM4P, REM4X, FXM4X
C. 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
procedures for the condensate drains 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.
! WARNING
STRUCTURAL DAMAGE
Failure to follow this warning could result in personal
injury or death, or property damage.
Combustible floor base is required when installing in a
downflow application with electric heat strips.
Structural damage could occur if manufacturer’s
downflow base accessory kit is not use when installing in
a downflow application.
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, remove 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.
D. HORIZONTAL INSTALLATION
Unit must NOT be installed with access panels facing up or
down. Access panels must only face to the side.
All models arefactory 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.
NOTE: When suspending unit from ceiling, dimples in casing
indicate suitable location of screws for mounting metal
support straps (refer to Figure 3).
NOTE: For optimum condensate drainage performance in
horizontal installations, unit should beleveled along its length
and width.
Figure 3
LOW VOLT
ENTRY
OPTIONS
Slope Coil In Horizontal Left Application (factory configuration)
A- COIL
HORIZONTAL LEFT
FIELD
SUPPLIED
HANGING
STRAPS
SECONDARY
DRAIN
SECONDARY
DRAIN
FRONT SERVICE CLEARANCE
(FULL FACE OF UNIT)
18 - 48 models = 21” (533mm)
60 model = 24” (610mm)
1¾” (45mm)
FILTER ACCESS
CLEARANCE
PRIMARY
DRAIN
POWER
ENTRY
OPTIONS
4 496 01 5503 01
Specifications are subjec t to change without notice.
PRIMARY
DRAIN
INSTALLA TION INSTRUCTIONS Fan Coils: FEM4X, FEM4P, REM4X, FXM4X
Figure 4
FACTORY SHIPPED
HORIZONTAL LEFT
APPLICATION
A- Coil in Horizontal Left Application (factory configuration)
A
COIL
BRACKET
COIL
SUPPORT
B
C
BRACKET
HORIZONTAL
DRAIN PAN
AIR SEAL
ASSEMBLY
REFRIGERANT
CONNECTIONS
HORIZONTAL LEFT
RAIL
DRAIN PAN
SUPPORT
BRACKET
COIL
PRIMARY DRAIN
SECONDARY DRAIN
HORIZONTAL LEFT
Horizontal Right Conversion of Units With Slope Coils
1. Remove blower and coil access paneland fitting panel
(refer to 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).
Figure 5
COIL SUPPORT RAIL
SLOPE COIL
COIL MOUNTING
SCREW
Conversion for Horizontal Right Applications - Slope Coil
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.
BLOWER
ASSEMBLY
DRAINPAN
496 01 5503 01 5
REFRIGERANT
CONNECTIONS
Specifications are subjec t to change without notice.
PRIMARY DRAIN
SECONDARY DRAIN
INSTALLA TION INSTRUCTIONS Fan Coils: FEM4X, FEM4P, REM4X, FXM4X
Horizontal Right Conversion of Units With A- Coils
1. Remove blower and coil access paneland fitting panel
(refer to 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.
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.
11. 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.
Figure 6
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
Conversion for Horizontal Right Applications - A- Coil
A
AIR SEAL
ASSEMBLY
HORIZONTAL
RIGHT
APPLICATION
B
C
6 496 01 5503 01
Specifications are subjec t to change without notice.
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