ICP FSM4X6000AT User Manual FAN COILS Manuals And Guides 1209239L

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These instructions must be read and understood completely before attempting installation.

Safety Labeling and Signal Words
DANGER,
NOTE

WARNING,

CAUTION,

and
Signal Words in Manuals
The signal word WARNING is used throughout this
manual in the following manner:

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.

The signal word CAUTION is used throughout this
manual in the following manner:

DANGER - Immediate hazards which will result in
severe personal injury or death.
Signal Words on Product Labeling

WARNING - Hazards or unsafe practices which
could result in severe personal injury or death.

Signal words are used in combination with colors
and/or pictures on product labels.

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.

TABLE OF CONTENTS
Introduction ....................................

Location .......................................

Clearances and Dimensions

.....................

Heater Packages ...............................

Position Unit ................................

4- 8

Air Ducts ......................................

Electrical Connections

......................

9 - 13

Refrigerant Tubing .............................

Refrigerant Metering Device

....................

Condensate Drains ............................

Accessories

..................................

Sequence of Operation .........................

Start-up Procedure

............................

Care and Maintenance
Airflow Performance

.........................
.......................

R-410A Quick Reference Guide .................

17
18 - 21

PERSONAL
HAZARD

INJURY, AND/OR

PROPERTY

DAMAGE

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.

496 01 5402 02

April 2011

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).
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.

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.

FSM4X, and FSU4X models are available for system size 5
ton (60,000 BTUH) nominal cooling capacity.

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.
See Clearances in Figure 1.

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.

If the unit is located in an area of high humidity, nuisance
sweating of casing may occur. On these installations a wrap of
2" (51mm) fiberglass insulation with a vapor barrier is
recommended.

Failure to maintain proper clearances could result in personal injury, death, and/or property damage.

FIRE HAZARD

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 (lm) of the supply end of the fan coil.

496 01 5402 02

Figure1

ClearancesandUnit Dimensions
OPENING)

( OPENI

N_/J

(SERVICE ACCESS)
38-11-82

iiii_i_i_iiii_`_i_`iiiiiiiiiiiiiiiiiiiiiiiiiiiii_`_ii__i_i_i!_i_jji!_i_i_i_i!_ii_
101
No

All Sides

With

From Supply Duct
All Sides
From First 3 feet of Supply Duct to Combustibles

0
0
1

Heaters

From Supply Duct to Combustibles after 3 feet

Heaters

Model
A
1800 12-7/16

B
C
11 19-13/16

D
12-5/16

E
22-1/16

F
14-5/16

G
21

H
42-11/16

2400
3000
3500

15-3/4
15-3/4
19-1/4

11 19-13/16
11 19-13/16
11 19-13/16

15-5/8
15-5/8
19-1/8

22-1/16
22-1/16
22-1/16

17-5/8
17-5/8
21-1/8

21
21
21

47-5/8
49-5/8
53-7/16

3600
4200
4800

19-1/4
19-1/4
19-1/4

11 19-13/16
11 19-13/16
11 19-13/16

19-1/8
19-1/8
19-1/8

22-1/16
22-1/16
22-1/16

21-1/8
21-1/8
21-1/8

21
21
21

49-5/8
49-5/8
53-7/16

6000

19-1/4

11 19-13/16

19-1/8

22-1/16

21-1/8

53-7/16

Model

1800
2400
3000

316
400
400

279
279
279

503
503
503

313
397
397

560
560
560

364
448
448

533
533
533

1084
1210
1261

3500
3600
4200

489
489
489

279
279
279

503
503
503

486
486
486

560
560
560

537
537
537

533
533
533

1357
1261
1261

4800
6000

489
489

279
279

503
503

486
489

560
560

537
537

610
533

1357
1357

576

562

627

....
Model
6000

A
22-3/4

o I E

B
C
11 19-13/16 22-11/16 I 22-1/8
m

F
24-11/16

GI H
24

59-3/16

.... :

Model
1800

A
15-3/4

B
C
11 19-13/16

D
15-5/8

E
22-1/16

F
17-5/8

G
21

H
49-5/8

2400
3000
3600

15-3/4
19-1/4
19-1/4

11 19-13/16
11 19-13/16
11 19-13/16

15-5/8
19-1/8
19-1/8

22-1/16
22-1/16
22-1/16

17-5/8
21-1/8
21-1/8

21
21
21

49-5/8
53-7/16
49-5/8

4200
4800
6000

19-1/4
22-3/4
22-3/4

11 19-13/16 19-1/8
11 19-13/16 22-11/16
11 19-13/16 22-11/16

22-1/16
22-1/16
22-1/16

21-1/8
24-11/16
24-11/16

21
24
24

49-5/8
53-7/16
59-3/16

496 01 5402 02

6000

578

279

503

iiliiliiliiliiiii
........

:!!!!!!!:
!!!!!!!!!!!!!!!!!

Model
1800
2400
3000

A
400
400
489

B
279
279
279

C
503
503
503

D
397
397
486

E
560
560
560

F
448
448
537

G
533
533
533

H
1261
1261
1357

3600
4200
4800

489
489
578

279
279
279

503
503
503

486
486
576

560
560
560

537
537
627

533
533
610

1261
1261
1357

6000

578

279

503

576

560

627

610

1503

H EATER PACKAG ES
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

POSITION

UNIT

Unit can stand or lie on floor, or hang from ceiling or wall.
Allow space for wiring, piping, and servicing unit.

PROPERTY

not factory approved could cause damage which would not
be covered under the equipment warranty.

DAMAGE HAZARD

Failure to follow this caution may result in property
damage

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.

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.
Figure 2

Upflow Installation

POWER
OPTIONS

SUPPLIED
SUPPLY DUCT
VO LT
ENTRY
OPTIONS

FRONT SERVICE CLEARANCE

SLOPE COIL UNITS
FEM4X
A
MODEL SIZE
18
12" (305mm)

60 model = 24" (610 mm)

U PF LOW/_

U:;_W

_DARY
I_/DOWN
DRA'N
FLOW__L_

_
(483mm)
II

PRIMA_

I
I
I
I

FIELD MODIFIED

SIDERETURN

!1 2-1/2" I

LOCATION
SLOPE COILFOR

UNITS ONLY

FIELD SUPPLIED
RETURN PLENUM

U PFLOW/DOWN FLOW
SECONDARY DRAIN _1

/
U PFLOW/DOWN FLOW _"
PRIMARY DRAIN

24
30

17" (432mm)

19" (483mm)

17" (432mm)

SLOPE COIL UNITS
FXM4X
MODEL SIZE
A
18
17" (432mm)
24

17" (432mm)

19" (483mm)

496 01 5402 02

B. DOWNFLOW
INSTALLATION

At completion of the downflow installation, caulk around the
vertical pan fitting to door joint to retain low air leak
performance of the unit.

PRODUCT
ORPROPERTY
DAMAGEHAZARD
Failureto followthis cautionmayresultin productor
propertydamage
The conversionof the fan coil to downflow requires

NOTE: Gasket kit number (EBAC01GSK) is also required for
all downflow applications to maintain low air leak/low sweat
performance.
C. HORIZONTAL

INSTALLATION

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.

Unit must NOT be installed with access panels facing up or
down. Access panels must only face to the side.

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.

FSU4X models require accessory kits for any horizontal
installation (see Product Specification literature for required
accessory kits).

During the conversion process, removed the plastic cap
covering the vertical drains only and discard.

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.

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.

Remove the plug from the overflow hole and discard.
Figure 3

Horizontal Left Application (Slope Coil) (FXM4X factory

A-COIL
HORIZONTAL

FIELD
SUPPLIED
HANGING
STRAPS

configuration)

LEFT

SECONDARY
DRAIN

PRIMARY
DRAIN

FRONT SERVICE CLEARANCE
(FULL FACE OF UNIT)
18 - 48 models = 21" (533mm)
60 model = 24" (610mm)

SECONDARY
DRAIN

LOW VOLT
ENTRY
OPTIONS

1-3/4"(45!_m)
FILTER ACCESS
CLEARANCE

POWER
ENTRY
OPTIONS

496 01 5402 02

PRIMARY
DRAIN

Figure4

HorizontalLeftApplication(A-Coil) (FEM4X,FSM4X,and FXM4Xfactoryconfiguration)

COIL

FACTORY SHIPPED
HORIZONTAL LEFT
APPLICATION

COIL
SUPPORT
RAI L
DRAIN PAN
SUPPORT
BRACKET

COIL

HORIZONTAL
DRAIN PAN

PRIMARY DRAIN
HORIZONTAL LEFT

AIR SEAL
ASSEMBLY

SECONDARY DRAIN
HORIZONTALLEFT
REFRIGERANT
CONNECTIONS

Horizontal Right Conversion of Units With Slope Coils
1. Remove blower and coil access panel and 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

Attach coil to casing flange using coil mounting screw
previously removed.
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.

Horizontal Right Conversion Applications

(Slope Coil) (FXM4X)

COIL MOUNTING

BLOWER
ASSEMBLY

COIL SUPPORT RAIL

SLOPE

REFRIGERANT
CONNECTIONS
SECONDARY

DRAIN

496 01 5402 02

HorizontalRightConversionof UnitsWithA-Coils
1.

Remove blower and coil access panel and fitting panel
(refer to Figure 6).

Install filler plate (A) as shown in horizontal right
application.
Remove condensate troughs
opposite tube sheets.

Remove coil mounting screw securing coil assembly
to right side casing flange.

Remove coil assembly.

Install horizontal pan on right side of coil assembly.

Lay fan coil unit on its right side and reinstall coil
assembly with condensate pan down (refer to
Figure 6).

Slide coil assembly into casing. Be sure coil bracket on
each corner of vertical pan engages coil support rails.

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.

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.

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.

Install hose onto plastic spout.

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
access panel

on right side of coil

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.

Horizontal Right Conversion Applications (A-Coil)

Figure 6

CONNECTIONS

ASSEMBLY
HORIZONTAL
RIGHT
APPLICATION

SUPPORT
RAI L

BRACKET

DRAIN
SUPPORT
BRACKET
COIL_
SUPPORT
RAI L

BRACKET
HORIZONTAL
DRAIN PAN

496 01 5402 02

HORIZONTAL

RIGHT

SECONDARY
HORIZONTAL

DRAIN
RIGHT

D. MANUFACTURED
HOUSINGAND MOBILEHOME
APPLICATIONS
.

2.
3.

Mobile Home or Manufactured
ing Applications

Figure 7

Fan coil unit must be secured to the structure using
field-supplied hardware.

4" (102mm)

Allow a minimum of 24 inches (610mm) clearance
from access panels.
Recommended
applications:

method

securing

for

Hous-

MAX

SECURE
FANFROM
COIL WALL
TO STRUCTURE
UNIT AWAY
PIPE STRAP

typical

_°1 (TYPICAL BOTH SIDES)

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.

UNIT AGAINST WALL
1/8" (3mm) INCH THICK ANGLE
MOUNTING BRACKET
(TYPICAL BOTH SIDES)
.----....__.._

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).
1////7

DOWN FLOW
BASE KIT

SECURE

UNIT TO FLOOR

p/
ANGLE
BRACKET OR PIPE STRAP
4" (102mm)
MAX

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).

Removal of Brackets on
Modular Units

Figure 8

BLOWER BOX
--4

BRACKET

°
2 SCREWS
COIL BOX

496 01 5402 02

AIR DUCTS
Connect supply-air duct over the outside of 3/4" flanges
provided on supply-air opening. Secure duct to flange using
proper fasteners for type of duct used, and seal duct-to-unit
joint.
Use flexible connectors

between duct work and unit to

prevent transmission of vibration. When
installed, use heat-resistant material for
between duct work and unit at discharge
work passing through unconditioned
insulated and covered with vapor barrier.

ELECTRICAL

electric heater is
flexible connector
connection. Duct
space must be

Duct work Acoustical Treatment
Metal duct systems that do not have a 90 degree elbow and
10 feet of main duct before first branch takeoff may require
internal acoustical insulation lining. As an alternative, fibrous
duct work may be used if constructed and installed in
accordance with the latest edition of SMACNA construction
standard on fibrous glass ducts. Both acoustical lining and
fibrous duct work shall comply with National Fire Protection
Association as tested by UL Standard 181 for Class 1 air
ducts.

CONNECTIONS

FEM4X (1-1/2 to 4 ton), FSM4X and FSU4X Fan Coil
models utilize an electronic fan board which has a low voltage
circuit protective fuse (5 amp), fan motor speed tap terminal
(SPT), and time-delay relay (TDR). To disable the TDR
feature, snip the jumper wire JWl (refer to Figure 9).

Make all electrical connections in accordance with the NEC
and any local codes or ordinances that may apply. Use
copper wire only. The unit must have a separate branch
electric circuit with a field-supplied disconnect switch located
within sight from and readily accessible from the unit.

FEM4X (5 ton) and FXM4X Fan Coil models have a low voltage
circuit protective fuse (3 amp) inline on the wire harness. Speed
selections are made at the fan motor by selecting taps 1,2, or 3
with the Blue wire. The motor is pre-programmed with the
time-delay circuit on some of the speed taps. (See Section D)

NOTE: When a pull-out type disconnect is removed from the
unit, only the Load side of the circuit is de-energized. The
Line side remains live until the main (remote) disconnect is
turned off.

Before proceeding with electrical connections, make certain
that supply voltage, frequency, phase, and circuit ampacity are
as specified on the unit rating plate. See unit wiring label for
proper field high and low voltage wiring.

ELECTRICAL

SHOCK or UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal
injury, death, and/or unit damage.
If a disconnect switch is to be mounted on unit, select
a location where drill and fasteners will not contact
electrical or refrigeration components.
Figure 9

ELECTRICAL

SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.
Turn off the main (remote) disconnect device before
working on incoming (field) wiring.
Incoming (field) wires on the line side of the disconnect found in the fan coil unit remain live, even when
the pull-out is removed. Service and maintenance to
incoming (field) wiring cannot be performed until the
main disconnect switch (remote to the unit) is turned
off.

Fan Coil Printed Circuit Board
FSM4X, FSU4X
®

RiO
HK61EA010

:_ i)

T C (} N

496 01 5402 02

A. LINE VOLTAGE

CONNECTIONS

Fan Coils installed without electric heat require the use of a
factory-authorized
Power Plug Kit (accessory part number
EBAC01PLG). This kit provides the electrical connections
necessary to supply the unit with 208/230V power when
electric heat is not present. For units without electric heat:
1.

Connect 208/230V power leads from field disconnect
to yellow and black stripped leads on Power Plug
(accessory part number EBAC01PLG).

Connect ground wire to unit ground lug.

When installing an electric heater, remove and discard
power plug (if equipped) from fan coil and connect
male plug from heater to female plug from unit wiring
harness.
(See
Electric
Heater
Installation
Instructions.)

B. 24V CONTROL SYSTEM
Connection

to Unit

Wire low voltage in accordance with wiring label on the
blower (also refer to Figure 10 through Figure 14). Use 18
AWG color-coded, insulated (35°C minimum) wire to make
the low-voltage connections between the thermostat, the
unit, and the outdoor equipment. If the thermostat is located
more than 100 feet from the unit (as measured along the low
voltage wire), use 16 AWG color-coded, insulated (35°C
minimum) wire. All wiring must be NEC Class 1 and must be
separated from incoming power leads. Refer to outdoor unit
wiring instructions for additional wiring recommendations.
Heater Staging
The controls are factory circuited for single-stage operation
(refer to Figure 11 and Figure 12). When 2 stages are
desired, cut W3 at the W2 wire nut, strip, and reconnect
according to the thermostat kit instruction (refer to Figure 13
- outdoor thermostat optional). When 3 stages are desired,
cut the W2 wire nut off and discard. Strip W2, W3, and E, and
reconnect according to the thermostat kit instructions (refer
to Figure 14 outdoor thermostats optional).

UNIT OPERATION HAZARD
Failure to follow this caution may result in improper
product operation.
If W2, W3, and E on any 3 stage heater (18, 20, 24, or
30kW) are individually connected - as with outdoor
thermostats or any other situation - emergency heat
relay must be used. If relay is not used, blower may
not operate when heaters are energized.

496 01 5402 02

Figure 10

Wiring Layout - Air Conditioning
Unit (Cooling Only)
FANCOIL
WIRING

THERMOSTAT

@@(9-

Figure 13

Wiring Layout - Heat Pump Unit
(Cooling and 2-Stage Heat with
One Outdoor Thermostat)

THERMOSTAT

RED

FANCOIL

HEAT PUMP

WIRING

(CONTROL)

RED
GRY
GRY
WHT
BRN
BLU

VlO

WHT
BLU

BRN
VlO
AIR COND.

Figure 11

Unit (Cooling
Heat)
Wiring
Layout and
- Air1-Stage
Conditioning
Figure 14

FANCOIL
WIRING

THERMOSTAT

@@-

Wiring Layout - Heat Pump Unit
(Cooling and 2-Stage Heat with
Two Outdoor Thermostats)

RED
FANCOIL

THERMOSTAT

WIRING

GRY

HEAT PUMP
(CONTROL)

RED
WHT
GRY
BRN

BLU
VIO

WHT
BRN
AIR COND.

BLU

VlO

Figure 12

Wiring Layout - Heat Pump Unit
(Cooling and 1-Stage Heat with No
Outdoor Thermostat)

THERMOSTAT

FANCOIL

HEAT PUMP

WIRING

(CONTROL)

RED

;

GRY

BRN

WriT

BLU

Vl°l'

496 01 5402 02

TransformerInformation
Transformer is factory wired for 230V operation. For 208V
applications, disconnect the black wire from the 230V terminal
on transformer and connect it to the 208V terminal (refer to
Figure 15).
Figure 15

Transformer

FEM4X (5 ton) and FXM4X models: fan speed is selected
at the motor connector. Units with or without electric heaters
require a minimum CFM. Refer to the unit wiring label to
ensure that the fan speed selected is not lower than the
minimum fan speed indicated.

Connections

BROWN
RED

YELLOW

Tap 1

Low

90 sec off delay

Tap 2

Medium

90 sec off delay

Tap 3

High

90 sec off delay

Tap 4

Electric Heat t

0 sec off delay

Tap 5

Max $

0 sec off delay

t Electric heat airflow is same CFM as Tap 3, but with 0
sec off delay.
For high static applications, see Airflow Performance
Tables for max airflow.

BLACK

PRIMARY

C. GROUND CONNECTIONS

ELECTRICAL

SHOCK HAZARD

Failure to establish uninterrupted
or unbroken
ground could result in personal injury and/or death.
According to NEC, ANSI/NFPA 70, and local codes,
the cabinet must have an uninterrupted or unbroken
ground in order to minimize potential for personal injury or death if an electrical fault should occur. The
ground may consist of electrical wire or metal conduit
when installed in accordance with existing electrical
codes. If conduit connection uses reducing washers,
a separate ground wire must be used.

To change motor speeds disconnect the BLUE fan lead from
motor connector terminal #2 (factory default position) and
move to desired speed-tap; 1,2, 3, or 5.
Speed-taps 1, 2, and 3 have a 90 second blower off time
delay pre-programmed into the motor. Speed tap 4 is used
for electric heat only (with 0 second blower time delay) and
the WHITE wire should remain on tap 4. Speed-tap 5 is used
for high static applications, but has a 0 second blower time
delay pre-programmed
into the motor (see Airflow
Performance Tables for actual CFM for each tap). Also, see
Figure 16 for motor speed selection location.
NOTE: In low static applications, lower motor speed tap should
be used to reduce possibility of water being blown off coil.

NOTE: Use UL listed conduit and conduit connectors for
connecting supply wire(s) to unit to obtain proper grounding.
Grounding may also be accomplished by using grounding lugs
provided in control box.
D. MINIMUM CFM AND MOTOR SPEED SELECTION
Units with or without electric heaters require a minimum CFM.
Refer to the unit wiring label to ensure that the fan speed
selected is not lower than the minimum fan speed indicated.
FEM4X models (1-1/2 to 4 ton): fan speed selection is done at
the fan motor. To change motor speeds, reposition wire at fan
motor speed terminals labeled 1-2-3 (refer to Figure 16).
FSM4X and FSU4X models: fan speed selection is done at
the fan relay on the electronic fan board. To change motor
speeds, disconnect fan lead used on relay terminal (SPT) and
replace with motor speed lead desired (refer to Figure 17).
Save insulating cap and place on motor lead removed from
relay.
NOTE: In low static applications, lower motor speed tap should
be used to reduce possibility of water being blown off coil.
All units have 2 or 3 motor speed taps. Low speed (red or 1) is
designed for mismatch outdoor unit applications. Medium
speed (blue or 2) is designed for straight matched
operations. High speed (black or 3) is used with high external
static duct situations on straight matched systems.

496 01 5402 02

Figure 16

FEM4X and FXM4X Motor Speed
Selection

Figure 17

FSM4X, FSU4X Fan Coil Relay and
Speed Tap Terminal

SPEED

TAP

COMMON

YELLOW
/ J_'_--FAN

DECK

L11S018

496 01 5402 02

REFRIGERANT

TUBING

Size and install refrigerant lines according to information
provided with outdoor unit. Route refrigerant lines to the fan
coil in a manner that will not obstruct service access to the
unit or removal of the filter.
1.

Find the liquid tube grommet in the small-parts bag
and slide it onto the liquid refrigerant line (field
line-set).

Remove the lower door. Remove the tubing plate (with
suction tube grommet) and slide the plate with
grommet onto the refrigerant lines (field line-set), away
from braze joints.

5.
6.
7.

Fit refrigerant lines into coil stubs. Wrap a heat sinking
material such as a wet cloth behind braze joints.
Braze using a SiI-Fos or Phos-copper alloy.
After brazing, allow joints to cool. Slide tubing plate
back into place and position grommets around suction
and liquid tubes to ensure air seal.

PRODUCT DAMAGE HAZARD

Remove rubber plugs from coil stubs using a pulling
and twisting motion. Hold coil stubs steady to avoid
bending or distorting.

Failure to follow this caution may result in product
damage.

Wrap TXV and nearby tubing with a heat-sinking
material such as a wet cloth.

Braze with SiI-Fos or Phos-copper alloy on copperto-copper joints and wrap a wet cloth around rear of
fitting to prevent damage to TXV.

REFRIGERANT

METERING

DEVICE

FEM4X, FSM4X, FSU4X, FXM4X
These Fan Coils have a factory installed hard shut-off TXV
designed only for use with R-410A refrigerant. Use only with
outdoor units designed for R-410A.
TXV is factory set and not field adjustable.

PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product
damage.
This Fan Coil has a hard shut-off TXV metering device. A compressor Hard Start Kit is REQUIRED in all
applications where the matching outdoor unit has a
single-phase reciprocating compressor.

496 01 5402 02

CONDENSATE

DRAINS

Unit is provided with primary and secondary 3/4" (19mm)
NPT drain connections. Refer to Figures 2, 3, 4, 5, and 6 to
identify the primary and secondary locations. To prevent
property
damage
and
achieve
optimum
drainage
performance, BOTH primary and secondary drain lines
should be installed and include properly sized condensate
traps (refer to Figure 18). Factory approved condensate
traps are available (accessory part number EBAC01CTK).

Figure 18

Recommended

Condensate Trap

2 MIN (51mm)

To connect drainlines, the drain connection knock-outs must
be removed. Use a knife to start the opening near the tab and
using pliers, pull the tab to remove the knock-out. Clean the
edge of the opening if necessary. After drain fittings are
installed, caulk the seam between the fitting and the cover to
retain the low leak rating of the unit.

It is recommended the PVC fittings be used on the plastic
condensate pan. Do not over-tighten. Finger-tighten plus
1-1/2 turns. Use pipe dope, to ensure proper seal.
Install traps in the condensate lines as close to the coil as
possible (refer to Figure 20), but avoid blocking filter access
panel.

Figure 19

Insufficient Condensate Trap

Install drain lines below the bottom of the drain pan and pitch
the drain lines down from the coil at least ¼ inch per foot of
run (6mm per 0.3m). Horizontal runs over 15 feet (5m) long
must also have an anti-siphon air vents (stand pipes),
installed ahead of the horizontal runs. Extremely long
horizontal runs may require oversized drain lines to eliminate
air trapping.
Route primary drain line to the outside or to a floor drain.
Check local codes before connecting to a waste (sewer) line.
Route the secondary drain line to a place in compliance with
local installation codes where it will be noticed when unit is
operational. Condensate flowing from secondary (overflow)
drain indicates a plugged primary drain - unit requires
service or water damage will occur.
Prime all traps, test for leaks, and insulate drain lines where
sweating could cause water damage. Consult local codes for
additional requirements or precautions.

DO NOT USE SHALLOW RUNNING TRAPS!

Figure 20
!

Condensate

Drain

o
¢q

If a gravity drain cannot be used, install a condensate pump.
Install the pump as close to the indoor section as possible.

o
PRODUCTorPROPERTYDAMAGE

HAZARD

Failure to follow this caution may result in product or
property damage.

UIRED
(USE FACTORY KIT OR

Use only full size P-traps in the condensate line (refer
to Figure 18). Shallow, running traps are inadequate
and DO NOT allow proper condensate drainage (refer
to Figure 19).

496 01 5402 02

_xxFIELD-SU

PPLIED TRAP)

PRIMARY TRAP REQUIRED (USE FACTORY KIT OR
FIELD-SUPPLIED TRAP OF PROPER DEPTH.
STANDARD P-TRAPS ARE NOT SUFFICIENT. SEE
FIGURE OF RECOMMENDED CONDENSATE TRAP)

ACCESSORIES
A. ELECTRONIC

AIR CLEANER

The Electronic Air Cleaner may be connected to FSM4X and
FSU4X fan coils as shown in Figure 21. This method
requires a field supplied transformer. See Electronic Air
Cleaner literature for kit requirements.

FAN COIL
(CONTROL)

THERMOSTAT

DD-

Wiring Layout of Electronic Air
Cleaner to Fan Coil (FSM4X &
FSU4X)

Figure 21

Wiring Layout of Humidifier to Heat
Pump

Figure 22

HEAT PUMP
(CONTROL)

G
C

CONTROL

IVV_y
__ w3

BOARD

FAN RELAY

Fq
D
Pq

230vAoNONq I I

I I I

.o.c

208/230V

COM

CONVERSION
KITII

, , , II

TOTRANSFORMER
_1
BLOWER
MOTOR

I_1
'1

I
I
I

o
Y

I'TO EACh'

24MAC

I ¢-'_

I
I

-_--_

}COM

]

I_-,

,
W2

H'IuMID,F_
FAN
/

WO,E

RELAY

I--N III

I
i I

_-t

, , II

I
IHuMIDISTAT

• b

; 208/230V
FROM MOLEX
PLUG AND

TRANSFORMER
(IN UNIT)

B. HUMIDIFIER
Connect humidifier and humidistat to fan coil unit as shown in
Figure 22 and Figure 23.

Figure 23

Wiring

Layout of Humidifier to Fan
Coil with Electric Heat
FAN COIL
(CONTROL)

THERMOSTAT
_

[--q

RED

I l
I

vlo

I
I
I
I

B_INi
'

E
C

I
I
;

AIR COND.

Ca__c
HUMIDISTAT

I
[11

-O

115V
-O

496 01 5402 02

SEQUENCE

OF OPERATIONS

A. CONTINUOUS

FAN

Thermostat closes R to G. G energizes fan relay on
electronic fan board which completes circuit to indoor blower
motor. When G is de-energized, there is a 90 second off
delay before relay opens.
B. COOLING MODE
Thermostat energizes R to G, R to Y, and R to O (heat pump
only). G energizes fan relay on electronic fan board which
completes circuit to indoor blower motor.
When G is
de-energized, there is a 90 second off delay before fan relay
opens.
C. HEAT PUMP HEATING MODE
Thermostat energizes R to G and R to Y. G energizes fan
relay on electronic fan board which completes circuit to
indoor blower motor. When G is de-energized, there is a 90
second off delay before fan relay opens.

START-UP

D. HEAT PUMP HEATING WITH AUXILIARY
ELECTRIC HEAT
Thermostat energizes R to G, R to Y, and R to W. G
energizes fan relay on PCB which completes circuit to indoor
blower motor. W energizes electric heat relay(s) which
completes circuit to heater element(s).
When W is
de-energized, electric heat relay(s) open, turning off heater
elements. When G is de-energized there is a 90 second off
delay before fan relay opens.
E. ELECTRIC HEAT OR EMERGENCY

HEAT MODE

Thermostat closes R to W. W energizes electric heat relay(s)
which completes circuit to heater element(s). Blower motor
is energized through normally closed contacts on fan relay.
When W is de-energized, electric heat relay(s) opens.

PROCEDURE

Refer to outdoor unit Installation Instructions for system
start-up
instructions and refrigerant charging method
details.

CARE AND MAINTENANCE
The system should be regularly inspected by a qualified
service technician.
Consult the servicing dealer for
recommended frequency.
Between visits, the only consumer service recommended or
required is air filter maintenance and condensate drain
operation.
Air Filter
Inspect air filters at least monthly and replace or clean as
required. Disposable type filters should be replaced.
Reusable type filters may be cleaned by soaking in mild
detergent and rinsing with cold water. Install filters with the
arrows on the side pointing in the direction of air flow.
Condensate

PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in poor unit
performance and/or product damage.
Never operate unit without a filter. Factory authorized
filter kits must be used when locating the filter inside
the unit. For those applications where access to an
internal filter is impractical, a field-supplied
filter
must be installed in the return duct system.

Drain

During the cooling season check at least monthly for free flow
of drainage and clean if necessary.

496 01 5402 02

AIRFLOW

PERFORMANCE

Model

TABLES

Blower Speed

Measured
0.10

FEM4X18OO

High
Medium

Static

0.20

ii ii ! !ili!

Pressure,
I

0.30

inlet to outlet
I

(inches

water

column)

0.40

0.50

0.60

666

619

566

659

619

578

538

499

572

530

486

441

396

Low

614

High
Medium

905

868

83O

792

753

823

786

747

7O7

665

622

Low

633

583

533

482

431

378

High
Medium

1130

1097

1063

1028

992

955

1033

1000

965

928

888

846

Low

84O

802

760

713

663

609

High
Medium

1308

1257

1204

FEM4X3500

1282

1238

1192

1142

1090

1036

Low

1168

1118

1067

1014

959

903

1344

1293

1240

FEM4X3600

High
Medium

1135

1081

FEM4X4200

High
Medium

FEM4X4800

Low

FEM4X2400

FEM4X3000

Low

....

1327

1282

1236

1187

1192

1151

1100

1039

970

890

1533
iiiillliiiiil,!,iiiiiii,_ii_i
_,i_iii_i,ii,!,i_iilDi
.... 1578

1480

1420

1353

1392

1344

1293

1240

1479

1437

Low

1303

1258

1211

1161

1108

1054

High
Medium

1805

1772

1739

1704

1669

1632

1652

1617

1581

1543

1504

1463

1458

1418

1377

1335

1292

1248

iiii iiii! !i
Measured
Model

FEM4X6000

Blower

Speed

Static

!!!!!!!!!!!!!!!!!!!!!!!!!
....

Pressure,

inletto

outlet(inches

watercolumn)

0.10

0.20

0.30

0.40

0.50

0.60

Tap 5

1897

1867

1836

1808

1774

1736

Tap 4

1817

1785

1757

1724

1693

1655

Tap 3

1817

1785

1757

1724

1693

1655

Tap 2

1657

1621

1589

1557

1518

1474

Tap 1

1443

1412

1377

1332

1286

1243

!ii
Model
FSM4X6000
FSU4X6000

Blower

Speed

0.10

High
Medium

_28
1959

Low

1748

!!!!!!!
Measured
Static
0.20
: .

Pressure,
0.30

inlet to outlet (inches
0.40

water column)
0.50

0.60

1898

1965
1829

1875
1750

1778
1663

1674
1566

1709

1659

1598

1525

1442

496 01 5402 02

....

Model

FXM4X1800

FXM4X2400

FXM4X3000

FXM4X3600

FXM4X4200

FXM4X4800

FXM4X6000

Blower Speed
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap
Tap

5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1

Measured Static Pressure, inlet to outlet (inches
0.10

0.20

0.30

water column)

0.40

0.50

0.60

66O

609

572

683

644

589

548

494

461

683

644

589

548

494

461

631

563

5OO

443

409

361

625

524

457

417

367

319

891

851

816

78O

!!!!!!i!:
825

795

757

722

674

634

825

795

757

722

674

634

726

695

635

598

543

5O9

631

563

5OO

443

409

361

1104

1050

1003

959

1041

998

944

886

837

772

1041

998

944

886

837

772

924

876

817

752

7O4

660

779

693

628

571

526

476

1332

1294

1253

1207

1157

1237

1206

1160

1121

1070

1013

1237

1206

1160

1121

1070

1013

1095

1058

1007

951

888

824

1014

885

773

673

609

549

1519

1490

1454

1419

1379

1332

1437

1403

1366

1333

1294

1245

1437

1403

1366

1333

1294

1245

1257

1226

1191

1141

1090

1033

1237

1206

1160

1121

1070

1013

1757

1725

1693

1653

1614

1576

1664

1626

1593

1552

1517

1477

1664

1626

1593

1552

1517

1477

1459

1420

1379

1336

1298

1259

1301

1241

1195

1150

1102

1039

2030

1995

1961

1927

1888

1842

1811

1775

1740

1703

1664

1613

1811

1775

1740

1703

1664

1613

1665

1632

1593

1556

1507

1453

1462

1418

1371

1327

1278

1228

NOTES:
1. Airflow based upon dry coil at 230v with factory approved filter and electric heater (2 element heater sizes 1800 through 3600, 3 element heater sizes 4200 through
6000).
2. Airflow at 208 volts is approximately the same as 230 volts because the ECM motor is a constant torque motor. The torque doesn't drop off at the speeds the
motor operates.
3. To avoid potential for condensate blowing out of drain pan prior to making drain trap: Return static pressure must be less than 0.40 in. wc. Horizontal
applications of 4200 - 6000 sizes must have supply static greater than 0.20 in. wc.
4. Airflow above 400 cfm/ton on 4800 - 6000 size could result in condensate blowing off coil or splashing out of drain pan.
5. Not recommended for use above 0.60 inches water column external static pressure.
6. Shading - Airflow outside 450 cfm/ton.

496 01 5402 02

FEM4X
1800
2400
3000
3500
3600
4200
4800
6000

400
0.020
---

600
0.044
0.044
--

800
0.075
0.075
0.048

1000
......
0.110
0.072

CFM
1200

1400

.....
0.100

....

0.072

0.100

0.130

0.070

0.092
0.092

....
.....
......

1600

1800

2000

0.120
0.120
0.086

-0.152
0.105

--0.130

Airflow performance chart was developed using fan coils with DRY coils.
When taking a static reading across a WET coil, adjust the static pressure numbers by adding the values in this table (for a given
CFM, wet coil will have greater static pressure drop than dry coil).
CFM
FEM4X
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1800

0.034

0.049

0.063

2400

0.016

0.027

0.038

0.049

.............
0.059

3000

0.049

0.059

3500
3600
4200

.......

4800

.........

6000

...........

...........
0.070

0.080

.....

0.055

0.064

0.073

0.081

.......

.....

0.034

0.042

0.049

0.056

.......

0.049

0.056

0.063

0.070

.....

0.038

0.043

0.049

0.054

0.059

0.049

0.054

0.059

0.065

0.070

!
6000

!!!

....

400

600

800

CFM
m

FSM4X
FSU4X

.........

1000

1200

......

1400

1600

1800

2000

0.120

0.152

0.187

Airflow performance chart was developed using fan coils with DRY coils.
When taking a static reading across a WET coil, adjust the static pressure numbers by adding the values in this table (for a given CFM, wet
coil will have greater static pressure drop than dry coil).
FSM4X

so4x

6000

CFM

16oo
17oo
18oo
iooo1

...........

ooo1 oo1 oo1 3oo1 4oo1
0.027

0.031

0.035

0.039

0.043

496 01 5402 02

CFM

FXM4X

_oo

6oo I 8oo _oooI _oo
I

_oo

_6oo _8oo _ooo

1800

0.020

0.044

0.075

......

2400

0.022

0.048

0.072

0.100

....

3000

0.022

0.048

0.072

0.100

....

3600

0.051

0.070

0.092

0.120

0.152

4200

0.051

0.070

0.092

0.120

0.152

4800

0.051

0.070

0.092

0.120

0.152

6000

......

0.086

0.105

0.130

Airflow performancechart was developedusingfan coils with DRY coils.
When taking a static reading acrossa WET coil, adjust the static pressure numbers by adding the values in this table (fora given CFM, wet
coil will have greaterstatic pressure drop than dry coil).
CFM
FXM4X
I
I
I
I

500160017001800 900,000,,00,200,300,400,500,600,700,800,900
12000

0.034

0.049

0.063

2400

0.016

0.027

0.038

0.049

.............
0.059

3000

0.049

0.059

3600

.....

4200

.......

4800

.........

6000

...........

...........
0.070

0.080

0.055

0.064

.........
0.073

0.081

0.049

0.056

Airflow performance chart was developed using fan coils with
sizes, and 15 kW electric heaters (3 elements) in the 4200 When using a different number of heater elements, adjust the
in this table (for a given CFM, more electric heater elements
FEM4X
FSM4X
FSU4X
FXM4X

No Heater

.......
0.063

0.070

.....

0.038

0.043

0.049

0.054

0.059

0.027

0.031

0.035

0.039

0.043

10 kW electric heater (2 elements) in the 1800 - 3600 model
6000 model sizes.
static pressure numbers by adding or subtracting the values
create higher static pressure drop).
Heater kW

8 or 10
9 or 15
Number of Heat Elements

I 18, 24, or 30

1800

+0.02

+0.01

-0.02

-0.04

2400

+0.02

+0.01

-0.02

-0.04

3000

+0.02

+0.01

-0.02

-0.04

3500

+0.02

+0.01

-0.02

-0.04

3600

+0.02

+0.01

-0.02

-0.04

4200

+0.04

+0.02

-0.02

-0.10

4800

+0.04

+0.02

-0.02

-0.10

6000

+0.04

+0.02

-0.02

-0.10

496 01 5402 02

R-410A

QUICK REFERENCE

GUIDE

• R-410A refrigerant operates at 50% - 70% higher pressures than R-22.
replacement components are designed to operate with R-410A.

Be sure that servicing equipment and

• R-410A refrigerant cylinders are rose colored.
• Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
• R-410A systems should be charged with liquid refrigerant. Use a commercial type metering device in the
manifold hose.
° Manifold sets should be 750 psig high-side and 200 psig low-side with 520 psig low-side retard.
° Use hoses with 750 psig service pressure rating.
° Leak detectors should be designed to detect HFC refrigerant.
° R-410A, as with other HFC refrigerants, is only compatible with POE oils.
° POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
° POE oils may cause damage to certain plastics and roofing materials.
° Vacuum pumps will not remove moisture from oil.
° A liquid line filter-drier

is required on every unit.

° Do not use liquid line filter-driers

with rated working pressures less than 600 psig.

° Do not install a suction line filter-drier
° Wrap all filter-driers

in liquid line.

and service valves with wet cloth when brazing.

° Do not use with an R-22 TXV.
° If indoor unit is equipped with an R-22 TXV, it must be changed to an R-410A TXV.
° Do not use capillary tube indoor coils.
° Never open system to atmosphere while it is under a vacuum.
° When system must be opened for service, break vacuum with dry nitrogen and replace all filter-driers.
° Do not vent R-410A into the atmosphere.
° Observe all WARNINGS,

CAUTIONS,

NOTES, and bold text.

International Comfort Products, LLC
Lewisburg, TN 37091 USA

496 01 5402 02

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ICP FSM4X6000AT User Manual FAN COILS Manuals And Guides 1209239L

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