ICP FSM2X2400A1 User Manual FAN COILS Manuals And Guides L0604342

ICP Evaporator Coils Manual L0604342 ICP Evaporator Coils Owner's Manual, ICP Evaporator Coils installation guides

User Manual: ICP FSM2X2400A1 FSM2X2400A1 ICP FAN COILS - Manuals and Guides View the owners manual for your ICP FAN COILS #FSM2X2400A1. Home:Heating & Cooling Parts:Icp Parts:Icp FAN COILS Manual

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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

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

Labeling

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

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

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

3 - 7

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

Electrical Connections

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

7 - 11

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

Refrigerant Metering Device ....................

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

Accessories

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

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

Start-up Procedure ............................

Care and Maintenance

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

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

DEATH, PERSONAL
DAMAGE HAZARD

INJURY, AND/OR PROPERTY

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 5000 01

October 2005

INTRODUCTION
Models FEM and FSM 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).

All models have a factory installed and appropriately
sized hard shut-off TXV metering device. FEM2, FSM2
and FSU2 are for R-22 refrigerant ONLY. FEM4, FSM4
and FSU4 are for R-410A refrigerant ONLY.

Model FSU 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).

Factory approved electric heater packages are available
in sizes 3kW through 30kW. See Product Specification literature for available accessory kits.

All models are available for system sizes 11/2- 5 tons
(18,000 - 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.
If the unit is located in an area of high humidity, nuisance
sweating of casing may occur. On these installations a
wrap of 2" 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
Figure 1

filter is recommended.
mote filter sizing.

Refer to ACCA Manual D for re-

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 of the supply
end of the fan coil.

Clearances and Unit Dimensions
OPENING)
No Heaters

All Sides

From Supply

Duct

All Sides
With

Heaters

From First 3 feet of Supply
From Supply

Duct to Combustibles

after 3 feet

1
0

Unit Size
1800
2400
3000
3500/3600
4200
4800
6000

Unit Size
1800

421X6

H (inches)
421X6

2400

471Xs

3000

47%6

49%

3600

537/16

495/8

4200

49%

4800

537/16

6000

593A6

3500

537/16

(SERVICE ACCESS)

L(OPENING) _/_

421X6

38-11-82

496 01 5000 01

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

POSITION

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

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. UPFLOW INSTALLATION
If return air is to be ducted through a floor, set unit on floor
over opening and use Y8to ¼ inch 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

FIELD SUPPLIED
SUPPLY DUCT

OPTIONS

LOW VOLT
ENTRY
OPTIONS
FRONT SERVICE CLEARANCE
18 - 48 models = 21"
60 model = 24"

SLOPE COIL UNITS
MODEL SIZE
A
UNITS

SECONDARY

18 (all)
24 & 30 (all)
35 (FEM) & 36 (FSU)

11/2"

DRAIN

12"
17"
19"

|
PRIMARY DRAIN
FIELD MODIFIED
A

SECONDARY

DRAIN

FIELD SUPPLIED
RETURN PLENUM

PRIMARY DRAIN

B. DOWNFLOW

INSTALLATION

In this application, field conversion of the evaporator coil
is required using accessory Downflow Kit along with an
accessory Base Kit. See installation instructions packaged with accessory kit. See Product Specification literature for kit part numbers.

496 01 5000 01

SIDE RETURN
LOCATION FOR
SLOPE COIL
UNITS ONLY

C. HORIZONTAL

INSTALLATION

Unit must NOT be installed with access panels facing up
or down. Access panels must only face to the side.
FEM and FSM models are factory built for horizontal left
installation (refer to Figures 3 and 4). They can be field
converted to horizontal right (accessory Gasket Kit re3

quired, see Product Specification literature for part number). Refer to Figures 5 and 6.
FSU models require accessory kits for any horizontal
installation (see Product Specification literature for required accessory kits).

Figure 3

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 be leveled along its
length and width.

Slope Coil In Horizontal Left Application (FEM & FSM factory configuration)

A-COIL
HORIZONTAL

FIELD
SUPPLIED
HANGING

LEFT

SECONDARY
DRAIN

STRAPS

PRIMARY
DRAIN

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

SECONDARY
DRAIN

LOW VOLT
ENTRY
OPTIONS

13/4_'
FILTER

ACCESS

CLEARANCE

POWER
ENTRY
OPTIONS

Figure 4

PRIMARY
DRAIN

A-Coil

in Horizontal Left Application

(FEM & FSM factory configuration)

FACTORY SHIPPED
HORIZONTAL LEFT
APPLICATION

COIL
BRACKET

COIL
SUPPORT
RAIL
DRAIN PAN
SUPPORT
BRACKET

COIL
BRACKET

HORIZONTAL
DRAIN PAN

PRIMARY DRAIN
HORIZONTAL LEFT

AIR SEAL

SECONDARY DRAIN
HORIZONTAL LEFT
REFRIGERANT
CONNECTIONS

496 01 5000 01

HorizontalRight Conversionof Units With Slope
Coils
1.

Remove blower and coil access panel and fitting
panel (refer to Figure 5).

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

Remove coil assembly.

Lay fan coil unit on its right side and reinstall coil assembly with condensate pan down (refer to Figure
5).

Figure 5

Conversion

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.

for Horizontal Right Applications

COIL MOUNTING
SCREW

- Slope Coil

BLOWER
ASSEMBLY

SLOPE COIL
SKI

DRAINPAN

DRAIN

REFRIGERANT
CONNECTIONS
SECONDARY

Horizontal Right Conversion

of Units With A-Coils

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

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

Remove coil assembly.

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

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.

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).

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.

Install horizontal pan on right side of coil assembly.

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

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

c. Remove filler plate (A) and install air splitter (B)
in place of filler plate.

496 01 5000 01

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.
Figure 6

Conversion

13. After brazing, make sure liquid and suction tube
grommets are in place to prevent air leaks and cabinet sweating.

for Horizontal Right Applications

- A-Coil

CONNECTIONS
HORIZONTAL
RIGHT
APPLICATION
SUPPORT
RAIL

BRACKET

DRAIN
SUPPORT
BRACKET
COIL_
SUPPORT-RAIL

BRACKET
HORIZONTAL
DRAIN PAN
PRIAMRY
HORIZONTAL RIGHT
SECONDARY
HORIZONTAL

D. MANUFACTURED
APPLICATIONS
1.
2.
3.

DRAIN
RIGHT

HOUSING AND MOBILE HOME
Figure 7

Mobile Home or Manufactured
Housing Applications

Fan coil unit must be secured to the structure using field-supplied hardware.
Allow a minimum of 24 inches clearance from access panels.

4" MAX

SECURE
COIL WALL
TO STRUCTURE
UNIT
AWAYFANFROM

PIPE STRAP

Recommended method of securing for typical applications:

[ I Y _'Ib_L

I_U

blUe_b}

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/_6"lag screws. Typical both sides of
fan coil.

UNIT AGAINST WALL
Y_INCH THICK ANGLE
MOUNTING BRACKET
(TYPICAL

BOTH

SIDES)

b. If fan coil is against wall, secure fan coil to wall
stud using Ys"wide right-angle brackets. Attach
brackets to fan coil using No. 10 self tapping
screws and to wall stud using 5/_6"lag screws (refer to Figure 7).
--

BASE

KIT

SECURE
UNIT TO FLOOR
DOWN BRACKET
FLOW
ANGLE
OR PIPE

STRAP

4" MAX

496 01 5000 01

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).

Figure8

[

Removalof Bracketson
ModularUnits

BLOWER

BOX

-2SCREWS
P 2 SCREWS

BRACKET

2SCREWS

COIL BOX

AIR DUCTS
Connect supply-air duct over the outside of %" flanges
provided on supply-air opening. Secure duct to flange using proper fasteners for type of duct used, and seal ductto-unit joint. If return-air flanges are required, install
factory authorized accessory kit.
Use flexible connectors between duct work and unit to
prevent transmission of vibration. When electric heater is
installed, use heat-resistant material for flexible connector between duct work and unit at discharge connection.
Duct work passing through unconditioned space must be
insulated and covered with vapor barrier.

ELECTRICAL

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

All 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 JW1 (refer to Figure 9).

NOTE: When a pull-out type disconnect is removed form
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.
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.

496 01 5000 01

ELECTRICAL

SHOCK or UNIT DAMAGE HAZARD

ELECTRICALSHOCKHAZARD

Failure to follow this warning could result in personal injury, death, and/or unit damage.

Failure to follow this warning could result in personal injury or death.

If a disconnect switch is to be mounted on unit, select a location where drill and fasteners will not
contact electrical or refrigeration
components.

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.

Figure

Fan Coil Printed Circuit Board

FSM, FSU
CEBD4S0_4L

01B

SS0LBm_

HSGI

{
RIO

HI<61EAO06

HK61 EA010

R G TCCW

R B TCCC

A. LINE VOLTAGE CONNECTIONS

B. 24V CONTROL SYSTEM

Fan Coils installed without electric heat require the use of
a factory-authorized Power Plug Kit (EBAC01 PLG). 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:

Connection

Connect 208/230V power leads from field disconnect to yellow and black stripped leads on Power
Plug (EBAC01 PLG).

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.)

to Unit

Wire low voltage in accordance with wiring label on the
blower (also refer to Figures 10, 11,12, 13, and 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 Figures 11 & 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).

496 01 5000 01

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

Figure 12
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.

FAN COIL
(CONTROL)

THERMOSTAT

[___

RED

[:__

BRN
C

[2__

/ Wiring Layout - Air Conditioning
Unit (Cooling Only)

_--R

w2
/ B_

Figure 10

HEATPUMP
(CONTROL)

[]

VlO

[]

C3_o
THERMOSTAT

FAN COIL
'CONTROL)

_R
_G

[]

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

Figure 13
W3
E

FAN COIL
(CONTROL)

THERMOSTAT

HEAT PUMP
(CONTROL)

AIR COND.

Z__ R

[]__c
[_]__
Figure 11
THERMOSTAT

Unit (Cooling
Heat)
Wiring
Layout and
- Air1-Stage
Conditioning
FAN COIL
CONTROL)

[]
[]

_w3

w_
ODTS

_R
_G

W3
E
AIR COND.

496 01 5000 01

Wiring Layout-

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

Figure 14

C. GROUND CONNECTIONS

FAN COIL

THERMOSTAT
CONTRO_Eo TT%

ELECTRICALSHOCKHAZARD
Failure to establish uninterrupted
ground could result in personal
death.

c:x

-T

or unbroken
injury and/or

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.
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.
FEM models: 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).

Transformer Information
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 Connections

BROWN

RED

FSM and FSU 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.

YELLOW

BLACK

496 01 5000 01

Figure16

FEM Motor Speed Selection

Figure 17

FSM &Speed
FSU Fan
Tap Coil
Terminal
Relay and

FAN

iNSULATING

CAP

(2)

MOTOR
TAP

SPEED
LEADS

WRAPPER
COMMON

FAN

REFRIGERANT

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

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.
Remove rubber plugs from coil stubs using a pulling
and twisting motion. Hold coil stubs steady to avoid
bending or distorting.
Wrap TXV and nearby tubing with a heat-sinking
material such as a wet cloth.

REFRIGERANT

METERING

Fit refrigerant lines into coil stubs. Wrap a heat sinking material such as a wet cloth behind braze joints.

6.
7.

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
Failure to follow this caution may result in product
damage.
Braze with SiI-Fos or Phos-copper alloy on copper-to-copper joints and wrap a wet cloth around
rear of fitting to prevent damage to TXV.

DEVICE

FEM2, FSM2, FSU2 Models:
These Fan Coils have a factory installed hard shut-off
TXV designed only for use with R-22 refrigerant, Use
only with outdoor units designed for R-22.
FEM4, FSM4, FSU4 Models:
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,

496 01 5000 01

DECK

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.

-'_

YELLOW

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.

CONDENSATE

DRAINS

Unit is provided with primary and secondary 3/4"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

Install traps in the condensate lines as close to the coil as
possible (refer to Figure 20), but avoid blocking filter access panel.
Install drain lines below the bottom of the drain pan and
pitch the drain lines down from the coil at least 1/4inch per
foot of run. Horizontal runs over 15 feet 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.

Figure 19

Insufficient

Condensate

Trap

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.
If a gravity drain cannot be used, install a condensate
pump. Install the pump as close to the indoor section as
possible.
Be sure to install plastic push-in plugs in unused condensate drain holes.

DO NOT USE SHALLOW RUNNING TRAPS!

Figure 20

Condensate

Drain

¢PRODUCT or PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product
or property damage.
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).

o
UIRED

(USE FACTORY KIT OR
FIELD-SUPPLIED

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)

496 01 5000 01

ACCESSORIES
A. ELECTRONIC

AIR CLEANER

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

Figure 21

Figure 22

Wiring

Layout of Humidifier to
Heat Pump

FAN COIL
THERMOSTAT

HEAT PUMP

(CONTROL)

(CONT
m..i..O

E_
[]- _G

Cleaner
Fan Coil
(FSM & FSU)
Wiring to
Layout
of Electronic
Air

C:% R

CONTROL
R

SPT

I
/

NO NC

C3._0

BOARD
G

[]
[]
[]
[]

230VAC-r2°Yq
FAN RELAY

''I'

CONVERSION KIT _

It l _LL___J

J
r
J
L

w2
o
Y

FAN HU

RELAY

TO TRANSFORMER
BLOWER

MOTOR
208/230V

I HUMIDISTAT

TO EAC
FROM MOLEX

PLUG AND

TRANSFORMER
(IN UNIT)

L....

B, HUMIDIFIER
Connect humidifier and humidistat to fan coil unit as
shown in Figures 22 & 23,

Figure 23

Fan Coil
with ofElectric
Heat to
Wiring
Layout
Humidifier
FAN COIL
(CONTROL)

THERMOSTAT

[___:q

REO R

IZb_
Ii _

[]

496 01 5000 01

AIR COND.

i I
I

115V_--_

I-

HUMID

_--_

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
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 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 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 deenergized, electric heat relay(s) open, turning off heater
elements. When G is de-energized there is a 90 second
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 fieldsupplied 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 5000 01

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 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,

496 01 5000 01

CAUTIONS, NOTES, and bold text,

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ICP FSM2X2400A1 User Manual FAN COILS Manuals And Guides L0604342

ICP Evaporator Coils Manual L0604342 ICP Evaporator Coils Owner's Manual, ICP Evaporator Coils installation guides

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