CARRIER Air Handler (indoor Blower&evap) Manual L0210273

User Manual: CARRIER CARRIER Air Handler (indoor blower&evap) Manual CARRIER Air Handler (indoor blower&evap) Owner's Manual, CARRIER Air Handler (indoor blower&evap) installation guides

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Installation

Instructions
FV4A

Direct Expansion
Fan Coil for Puron® Refrigerant
002, 003, 005, 006

______-_

A98023

Fig. 1--Model

FV4A

NOTE: Read the entire instruction manual before starting the installation.
This symbol --->indicates a change since the last issue.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may
cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance.
The qualified installer or agency must use factory-authorized kits or accessories when modifying this product. Refer to the individual insmlctioas
packaged with kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read
these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes and National Electrical Code
(NEC) for special requirements.
Recognize safety information. This is the safety-alert symbol/K.
the potential for personal injury.

When you see this symbol on the unit and in instructions manuals, be alert to

Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety-alert symbol. DANGER
identifies the most serious hazards which will result in severe personal injury of death. WARNING signifies hazards which could result in personal
Form:

IM-FV4A-05

Cancels:

IM-FV4A-04

Printed in U.S.A.

3-02

Catalog No.

63FV-4A4

injury or death. CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage. NOTE
is used to highlight suggestions which will result in enhanced installation, reliability, or operation.
WARNING:
Before installing or servicing unit, always turn off all power to unit There may be more than 1 disconnect
switch. Turn off accessory heater power if applicable. Electrical shock can cause personal injury or death.

INTRODUCTION
Model FV4A

Fan Coil units are designed

mobile

applications.

home)

pumps

These

for flexibility

units are designed

and can be used for upflow,

specifically

horizontal,

for Puron (R410A)

or downfhiw

(kit required and manufactured

and must be used only with Puron

air conditioners

and

and heat

as shipped.

These

units are available

electric

heater

for application

packages

are available

in systems

of 24,000

through

60,000

in 5 through 30 kw. See Product Data

Btuh nominal

cooling

for available

accessory

capacities.

Factory-anthorized,

field-installed

kits.

INSTALLATION
PROCEDURE

I_HECK

Unpack

unit and move

Inspect

equipment

plate which

to final location.

for damage

prior

proper

installation

contains

PROCEDURE

EQUIPMENT

2--MOUNT

When

installing

ceiling

taking

File claim

information.

unit is installed

Check

cam not to damage
with shipping

rating plate

unit.

company

if shipment

to be sure unit matches

from ceiling

or wall.

Allow

space

over a finished

ceiling

and/or

living area, building

pan to be installed under the entire unit. Some
codes for additional
restrictions
or precautions.
When

carton

is damaged

or incomplete.

Locate

unit rating

job specifications.

FAN COIL

Unit can stand or lie on floor, or hang
IMPORTANT:

Remove

to installation.

any fan coil over a finished

localities

ceiling

may allow

and/or

living

for wiring,

the alterative

area, installation

piping,

and servicing

codes

of running

may require

a separate,

of a secondary

uniL
a field-supplied

secondary

drain

secondary

condensate

pan under entire

condensate

line. Consult

local

unit to avoid damage

FV4A Fan Coils can be installed for upflow and horizontal-leR
applications
as factory shipped. (See Fig. 2, 4 and 8.) Units can be installed
horizontal-right
applications
with field modifications.
Units may be converted
for downfiow
applications
using factory-authorized
accessory
NOTE:
A.

To ensure

Upflow

If return
Only

is recommended.

proper

drainage

for horizontal

installations,

unit must be installed

so it is within

1/8 in. level of the length

and width

for
kit.

of unit.

Installation

air is to be ducted,

use return-air

opening

install duct flush with floor. Set unit on floor over opening.
provided.

All return

air must pass through the coil. (See Fig. 2.)

SUPPLY DUCT

ENTRY
OPTIONS
002-005 21-1N.
006 24_1N. FRONT SERVICE
CLEARANCE

[

UPFLOW/DOWNFLOW -SECONDARY DRAIN

UNIT
0O3

[

A
191n.

1/2-

UPFLOW/DOWNFLOW -PRIMARY DRAIN
FIELD MODIFIED
A

SIDE RETURN
LOCATION FOR
SLOPE COIL
UNITS ONLY

UPFLOW/DOWNFLOW
SECONDARY
DRAIN "_

UPFLOW/DOWNFLOW
PRIMARY DRAIN

FIELD SUPPLIED
RETURN PLENUM

A00091

Fig. 2--Slope

Coil Unit in Upflow Application
--2_

BLOWER BOX

r
-2SCREWS I
I

BRACKET

2SCREWS
COIL

BOX

A95293
Fig. 3_Modular
B.

Modular

Units

The FV4A Fan Coil in size 006 is a 2-piece
and blower

box, for ease of installation.

modular

unit. Modular

from lower

To reassemble,
C.

2. When
D.

above

compiles

support

procedure.

Be certain

with all applicable

for unit by setting

suspending

Horizontal-Right

Conversion

1. Remove

blower

2. Remove

screw

3. Remove

coil assembly.

building

dimples

securing

of Units

panels

coil assembly

access

flange

panels

sure liquid and suction
Horizontal

To convert

unit into 2 components,

coil box

when

reassembling.

with

Right

blower

2. Remove

metal

3. Remove

2 snap-in

using

Conversion

air-seal

panel,

panels.

fitting

panel

assembly

nir-seal

b. Remove

air apiltter

condensate

pan.

pan.
location

of screws

for mounting

metal

support

straps.

(See Fig. 4.)

(See

removed

aligning

Fig. 5.)

flange.

with condensate
coil mounting

boles

with tubing

to prevent

pan down.

(See Fig. 5.)

screw.
connections

and condensate

air leaks and cabinet

sweating.

pan connections.
Install

grommets

after brazing.

With A-Coil

A-coil

(See Fig. 6.)
to condensate

pan. Remove

fitting panel.

in unit.

out of unit.

drain pan support

a. Remove

of a secondary

Coils

panel.

coil assembly

are in place

of Units

clips securing

4. Slide coil and pan assembly

6. Convert

proper

installation

right instanations:

clip securing

horizontal

condensate

indicate

Slope

and fitting

previously

and fitting

and coil access

5. Remove

secondary

to right side casing

tube grommets

units for horizontal

1. Remove

that may require

fight installations:

and coil access

coil to casing

6. Reinstall

all fasteners

codes

in casing

4. Lay fan coil on its fight side and reinstall

Make

to disassemble

2 screws which secure brackets.
(See Fig. 3.) Remove either 2 screws in each front
all 4 screws in each comer. (See Fig. 3.) Sections may now be separated by lifting

to reinstall

it in or above

unit from ceiling

To convert units for horizontal

5. Attach

installer

Installations

Be sure installation
1. Arrange

allows

section.

reverse

Horizontal

construction

(See Fig. 3.)

To disassemble
unit, remove rear comer brackets by removing
comer of coil box, or 2 screws in blower box. Do not remove
top section

Unit Assembly

bracket

for horizontal

assembly

from coil support rail on left side of unit and reinstall

righL

from coil by removing

(B) from

on coil support

coil seal assembly

4 screws.

(See Fig. 6.)

by removing

3 screws.

--3--

(See Fig. 6-factuty-shippod

inset.)

rail on right side of unit.

_RILONTAL

LEFT

'!RIMARY

FIELD

_
DRAIN

SJk L, D
HANGING
HANGING
STRAPS
STRAPS

002_05
21 -iN.
006 24-1N.
FRONT SERVICE
CLEARANCE
(FULL FACE
OF UNIT)

UNIT

LOW VOLT
ENTRY
OPTIONS

1 3/4 IN

FILTER ACCESS
CLEARANCE

SECONDARY
DRAIN

POWER
ENTRY

OPTIONS

A00096

Fig. €--Slope

Coil in Horizontal-Left

Application

(Factory

Ready)

COIL MOUNTING

BLOWER
ASSEMBLY

COIL
RAIL

SLOPE COIL
SKI

"PRIMARY
CONNECTIONS

DRAIN

-OVERFLOW HOLE
;ECONDARY DRAIN
A02002

..-).

Fig. 5_Slope

Coil in Horizontal Right Application

c. Remove filler plate (A) and install air splitter (B) in place of filler plate.
d. Install filler plate (A) as shown in horizontal tight application.
e. Remove condensate _oughs (C) and install on opposite tube sheets.
f. Install hose onto plastic spout.
7. Install hofizontaI pan on fight side of coil assembly.
8. Slide coil assembly into casing. Be sure coil bracket on each comer 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 offset is nsc.d on fight side of unit
to secure horizontal pan.
---4---

CONNECTIONS
._

HORIZONTAL
RIGHT
APPLICATION

SUPPORT
RAIL

DRAIN PAN
SUPPORT _
BRACKET
COIL_
SUPPORT
RAIL

BRACKET
DRAIN
HORIZONTAL
SECONDARY
HORIZONTAL

pAN
RIGHT
DRAIN
RIGHT
A00071

Fig.

_--A-Coil

Horizon_l-Right

Application

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 and fitting panels, aligning holes with tubing connections and condensate pan connections. Be sure to reinstall metal clip
between fitting panel and vertical condensate pan.
Make sure liquid and suction tube grommets
F.

axe in place to prevent air leaks and cabinet sweating.

Downflow Installations

To convert units for downflow applications, refer to Installation Instructions supplied with kit for proper installation. For FV4A unit size 003, use
kit Part No. KFADC02OISLP. For FV4A unit sizes 002, 005, and 006 use kit Part No. KFADC0401ACL. Use fireproof resilient gasket, 1/8- to
l/4-in, thick, between duct, unit, and floor.
G.

Manufactured

and Mobile Home Housing Applications

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

hardware.

2. Allow a minimum of 24" clearance from access panels.
3. Recommended

method of securing for typical applications

a. If fan coil is away from wall, attach pipe sa'ap 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-in. lag screws. Typical both sides of fan coil.
b. If fan coil is against wall, secure fan coil to wall stud using li8-in, thick right-angle brackets. Attach brackets to fan coil using No. 10
self tapping screws and to wall stud using 5/16-in. lag screws. (See Fig. 7.)
PROCEDURE

3---AIR DUCTS

Connect supply-air duct over outside of 3/4-in, flange provided on supply-air opening. Secure duct to flange with proper fasteners for type of duct
used, and seal duct-to-unit joint.
Duct connection flanges are provided on unit air discharge connection,
When using FV4A units with 20-, 24-, and 30-kw electric heaters, maintain a I-in. clearance from combustible materials to discharge plenum and
ductwork for _ distance of 36 in. from unit. Use accessory downflow base to maintain proper clearance on dowrdlow installations.
Use flexible connectors between ductwork and unit to prevent transmission of vibration. When electric heater is installed, use heat resistant material
for flexible connector between ductwork and unit at discharge connection. Doctwork passing through unconditioned space must be insulated and
covered with vapor barrier.
Ductwork Acoustical Teeatment
Metal duct systems that do not have a 90 ° elbow and I0 ft of main duct to fast branch takeoff may requite internal acoustical insulation lining.
As an alternative, fibrous ductwork 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 ductwock shall comply with National Fire Protection Association Standards 90A
or B as tested by UL Standard 181 for Class 1 air ducts.
--5--

4" MAX
SECURE

FAN COILTO

STRUCTURE

UNIT AWAY FROM WALL
PIPE STRAP
(TYPICAL BOTH SIDES)
_'_

OR
UNIT AGAINST

WALL

1/8-lB. THICK ANGLE
MOUNTING BRACKET
(TYPICAL BOTH SLOES)

DOWN FLOW
(KFACB)

SECURE UNITTO FLOOR
ANGLE BRACKET OR PIPE STRAP

4" MAX
A02003

.--)

Fig. 7--A-Coil

COIL

FACTORY SHIPPED
HORIZONTAL LEFT
APPLICATION

COIL
SUPPORT
RAIL
DRAIN PAN
SUPPORT
BRACKET

COIL

HORIZONTAL
DRAIN PAN

PRIMARY DRAIN
HORIZONTAL LEFT

AIR SEAL
ASSEMBLY.

SECONDARY DRAIN
HORIZONTAL LEFT
REFRIGERANT
CONNECTIONS
A00072

Fig. 8--A-Coil
PROCEDURE

4---ELECTRICAL

in Horizontal Left Application (Factory Reedy)

CONNECTIONS

On units with a factory installed disconnect with pull-out removed, service and maintenance can be safely performed on only the load side of the
control package.
A_ WARNING:
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 wiring can not be performed until the main disconnect switch (remote to
the unit) is turned off. Failure to do so will result in electrical shock causing personal injury ordeath.
A.

Line-Voltage

Connections

If unit contains an electric heater, remove and discard power plug from fan coil and connect male plug from heater to female plug from unit wiring
harness. (See Electric Heater Installation Instructions.)
For units without electric beat:
1. Connect 208/230v power leads from field disconnect to yellow and black s_dpped leads.
---6--

2. Connect ground wire to unit ground lug.
NOTE: Units installed without electric heat should have a field-supplied sheet metal block-off plate coveting the heater opening. This will reduce
air leakage and formation of exterior condensation.
Check all factory wiling per unit wiring diagram and inspect factory wiring connections to be sure none were loosened in _ansit or installation.
/tx WARNING:
Before installing or servicing system, always turn off all power to system. There may be more than 1
disconnect switch. Turn off accessory heater power if applicable. Electrical shock can cause personal injury or death.

AX
CAUTION: If a disconnect switch is to be mounted on the unit, select a location where drill or fastener will not contact
electrical or refrigerant components. Electrical shock can cause personal injury or death.
NOTE:
Before proceeding with electrical connections,
make cemain that supply voltage, frequency, and phase are as specified on unit rating plate.
Be sure that electrical service provided by the utility is sufficient
to handle the additional
load imposed by this equipment. See unit wiring label
for proper field high- and low-voltage
wiring. Make all electrical connections
in accordance
with 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.

24-V Control System Connections

to Unit Printed-Circuit

Board (PCB)

Refer to unit wiring instructions for recommended wiring procedures. Use No. 18 AWG color-coded, insulated (35°C minimum) wires to make
low-voltage counections between thermostat and unit. If thermostat is located more than 100 ft from unit (as measured along the low-voltage
wires), use No. 16 AWG color-coded, insulated (35°C minimum) wires. PCB is circuited for single-stage heater operation. When additional heater
staging is desired using outdoor thermostats or Intelligent Heat Staging, remove Jumper J2 on PCB to enable staging.
Connect low-voltage leads to thermostat and outdoor unit. (See Fig. 9, 10, 11, or 12.)
INDOOR

CONTROL

FAN

COIL
AIR

HEAT STAGE 2

....

1-SPEED
CONDITIONER

I Y1

" REMOVE
J2 JUMPER
"_ FOR HEAT STAGING

HEAT STAGE 1
COOL STAGE 1
FAN

24 VAC HOT

DEHUMIDIFY
24 VACCOMM

[_
I

HUMIDIFIER

HUMIDIFY

I--';--]
SENSOR

OUTDOOR
SENSOR

A98477

Fig. 9_FV4A
C.

Intelligent

Heat Staging

Heat staging

Option

of the electric

a corporate
2-speed programmable
following electric heat packages:
Relay heaters
Complete
NOTE:
wiring

_FCEHI401N09,

system
Where

must

local

be NEC

A factory-anthotized

heat package

thermostat

wiring

kit is available

wiring

secondary

IMPORTANT:

circuit

of transformer

KFCEH180

be routed

for installation

is protected

through

from incoming

are installed, the circuit breaker can be used as a disconnect.
black wire from 230-v terminal on transformer and connect
The

is installed

Thermidistat
IF20,

as a part of a single-speed

heat pump

Control,

control

KFCEH

or capable

zoning

system

using

and any 1 of the

1901C20,

KFCEH2101F24,

OR KFCEH2201F30.

splices

can be made inside

the fan coil unit.

in Fig. 9, 10, 11, or 12.

1 and must be separated

disconnect

when the FV4A

TSTATXXP2S01-B),

KFCEHI701CI5,

as shown

codes require thermostat
Class

is possible

(model

KFCEH1501FI5,

low-voltage

Fan Coil Wiring with 1-Speed Air Conditioner

by a 5-amp

conduit

power

or raceways,

of 0- through 10-kw applications.
Transformer
it to 208-v

When electric heat packages

is factory wired for 230-v operation.
terminaL (See Fig. 13.)

fiise mounted

on printed-circuit

Do not use outdoor thermostat with Intelligent Heat Staging.

--7--

All

leads.

board.

For 208-v

with circuit

applications,

breakers

disconnect

INDOOR

CONTROL

HEAT STAGE 2

FAN COIL

....

2"SPEED
AIR CONDITIONER

"-'J" RE!OVE

J2 JU!PER

HEAT STAGE 1
COOL STAGE 1

• FOR HEAT STAGING

COOL STAGE 2 _-_
FAN
24 VAC HOT

-D

REMOVE

[]

....

DEHUMIDIFY

J'J1 JUMPER
FOR
DEHUMIDIFY

._'MOqES

....7__.-:__-____

24 VAC COMM
HUMIDIFY

-----_

HUMIDIFIER
(24VAC)_--

NIA
OUTC<_OR
I--I--_"_
---

SENSOR

A98478

Fig. IO--FV4A

INDOOR

Fan Coil Wiring with 2-Speed Air Conditioner

CONTROL

FAN COIL

RVS COOLING

....

HEAT STAGE 3

....

._.

1 -SPEED
HEAT PUMP

"_,FOR
REMOVE
HEATJ2STAGING
JUMPER

HEAT STAGE 2 [_
HEAT/COOL
STAGE 1

24 VAC HOT
REMOVE
]
DEHUMIDIFY

....

'' Jt
JUMPER FOR
DEHUMIDIFY

MODES

24 VAC COMM
HUMIDIFY

J
(24VAC)

RVS HEATING

OUTER
FI- '

OUTDOOR
.............

"-,
J

A98475

Fig. 11--FV4A

Fan Coil Wiring with 1-Speed Heat Pump

D. Ground Connections
Ax WARNING: The cabinet must have an uninterrupted or unbroken ground according to NEC, ANSI/NFPA 70 and local
codes to minimize personal injury if an electrical fault should occur. The ground may consist of electrical wire or metal
conduit when installed in accordance with existing electrical codes. (See Ground/Conduit Note below.) Failure to follow this
warning could result in an electrical shock, fire, or death.
NOTE: Use UL listed conduit and conduit connector to connect supply wiro(s) to unit and obtain proper grounding. If conduit connection uses
reducing washers, a separate ground wire must be used. Grounding may also be accomplished by using grounding lug provided in control box.
Use of dual or multiple supply circuits will require grounding of each circuit to ground lugs provided on unit and heaters.
----8---

INDOOR

FAN COIL

CONTROL

RVS cOOLING
H EAT/COOL
STAGE1 [_

....
....

HEATSTAGE3
HEAT/COOL
STAGE2

;

F_ [__
24 VAC HOT

L..t
....

DEHUMIDIFY
24VAC COMM
HUMIDIFY

2-SPEED
HEAT PUMP

[_
['_.

-REMOVE
Jt FOR
DEHUMIDIFY
MODES

....
---"_

HUMIDIFIER
(24 VAC)

RVS HEATING

OUT.OR
.............

A02005

--)

Fig. 12_4A

Fan Coil Wiring with 2-Speed Puron Heat Pump

BLK

A94067

Fig. 13_Transformer Connections
PROCEDURE 5_REFRIGERANT TUBING CONNECTION AND EVACUATION
Use accessory tubing package or field-supplied tubing of refiigerant grade. Insulate entire suction tube ff field-supplied tubing is used. Tubing
package has an insulated suction tube. Do not use damaged, dirty, or contaminated tubing because it may plug refrigerant flow contlol device.
When tubing package is used and sweat connections are made within 60 sec, coil and tubing system does not require evacuation. Always evacuate
coil and field-supplied tubing to 500 microns before opening outdoor unit service valves.
CAUTION: A brazing shield MUST be used when tubing sets are being brazed to the unit connections to prevent
damage to the unit surface. Braze with SiI-Fos or Phos-copper on copper to copper joints. Wrap s wet cloth around rear of
fitting to prevent damage to TXV.

CAUTION: To prevent damage to thermostatic expansion valve, remove sensor bulb from vapor tube while brazing
vapor connections. Units have sweat suction and liquid tube connections, Make suction tube connection first.
Units have sweat suction and fiquid tube connections. Make suction tube connection first.
1. Cut tubing to correct length.
2. Insert tube into sweat connection on unit until it bottoms.
3. Braze with Sil-Fos or Phos-oopper.
/_

CAUTION:

Wrap s wet cloth around rear of fitting to prevent damage to factory-made

joints.

4. Evacuate coil and tubing system to 500 microns using deep vacuum method.
PROCEDURE

6_CONDENSATE

DRAIN

Units are equipped with primary and secondary 3/4-in. _
drain connections. For proper condensate line installation see Fig. 2, 4, 5, 6, and 8.
To prevent property damage and achieve optimum drainage performance, BOTH primary and secondary drain lines shoald be installed and include
properly-sized condensate traps. (See Fig. 14 and 16.) Factory-approved condensate traps are available. Be sure to install plastic push-in plugs in
unused condensate drain fittings. It is recommended that PVC fittings be used on the plastic condensate pan. Do not over-tighten. Finger-tighten
plus

1-1/2 turns. Use pipe dope.

UNIT

2" M]N

A02006

-->

Fig. 14_Recommended

Condensate Trap

DO NOT USE SHALLOW RUNNING TRAPS!
A95320

Rg. 15--Insufficient
/_

CAUTION:

Shallow running traps are inadequate

Condensate

Trap

and DO NOT allow proper condensate

drainage. (See Fig. 15.)

NOTE: When connecting condensate drain lines avoid blocking filter access panel. Prime both primary and secondary condensate traps after
cormecfing to drain pan.
NOTE: If unit is located in or above a living space where damage may result from condensate overflow, a field-supplied external condensate pan
should be installed underneath the entire uniL and a secondary condensate line (with appropriate trap) should be run from the unit into the pan.
Any condensate in this external condensate pan should be drained to a noticeable place. As an alternative to using an external condensate pan, some
localities may allow the use of a separate 3/4-in. condensate line (with appropriate trap) to a place where the condensate will be noticeable. The
owner of the structure must be informed that when condensate flows from the secondary drain or external condensate pan, the unit requires
servicing, or water damage will occur.
Install traps in the condensate lines as close to the coil as possible. (See Fig. 16.) Make sure that the outlet of each trap is below its connection
to the condensate pan to prevent condensate from overflowing the drain pan. Prime all traps, test for leaks, and insulate traps if located above a
living area.
Condensate drain lines should be pitched downward at a minimum of 1 in. for every 10 ft. of length. Consult local codes for additional restrictions
or precautions.
z_
CAUTION:
mulL

Never operate unit without a filter or with filter access door removed. Damage to blower motor or coil can

IMPORTANT: Factory authorized tilters must be used when locating the filter inside the unit. (See Table 1.) For those applications where access
to an internal filter is impractical, a field-suppfied filter must be installed in the return duct system.
PROCEDURE
7---UNIT START-UP
Refer to outdoor unit Installation Instructions for system start-up inst_mctions and refrigerant charging method details.
--I0_

Table

l_iltsr

Kits
SIZE

PART NUMBER
FILTER KIT
(12 PACK)

USED WITH

KFAFK0212MED

002,

KFAFK0312LRG

003. 005

KFAFK0412XXL

006

ACCESS
PANEL
SECONDARY DRAIN REQUIRED
(USE FACTORY KIT OR
FIELD-SUPPLIED TRAP)
PRIMARY TRAP REOUIRED_
(USE FACTORY KIT OR
FIELD-SUPPLIED TRAP OF
SUFFICIENT DEPTH.
STANDARD PRIMARY TRAPS
ARE NOT SUFFICIENT, SEE
FIGURE OF RECOMMENEDED
CONDENSATE TRAP)
A_0_

--)

Fig. 16--Condensate Trap and Unit
PROCEDURE 8---EASY SELECT CONFIGURATION TAPS
Easy Select TM taps are used by the installer to configure a system. ICM2 motor uses the selected taps to modify its operation to a pre-programmed
table of airflows. (See Table 3 and 4.) Airflows are based on system size or mode of operation and those airflows are modified in response to other
inputs such as the need for de-humidification, (See Fig, 17 and 18,)
The FV4A Fan Coil most be configured to operate properly with system components with which it is installed. To successfully configure a basic
system (see information printed on circuit board label located next to select pins), move the 6 select wires to the pins which match the components
used.
A.

AUX HEAT KWICFM - Select heater range for size of electric heater installed

Installer must select the auxiliary heat airflow approved for application with kw size heater installed. If no heater is installed, this step can be
skipped. Each select pin is marked with a range of heaters for which airflow, also marked, is approved. For increased comfort select the narrownst
kw range matching the heater size, for example, 0-10 for 10-kw heater. This airflow must be greater than the minimum CFM for electric heater
application with the size system installed for safe and continuous operation. (See Table 5 and 6 for airflow delivery and minimum CFM.) Note
that airflow marked is the airflow which will be supplied in emergency heat mode and heating mode on air conditioners when electric heat is the
primary beating source. In heat pump heating mode when electric heaters are energized, the ICM2 will run the higher of heat pump heating airflow
and electric heater airflow to ensure safe heater operation. The factory selection is the largest heater range approved. (See Fig. 17, A as indicated.)
B.

AC/HP SIZE - Select system size installed

The factory setting

for air conditioner

needs to select air conditioner
to all operational
modes with
C.

SYSTEM

TYPE

The type of system

- Select

or heat pump

or heat pump
the exception
system

size is the largest

unit meant

for application

with the model

size to ensure that airflow delivered
falls within proper
of electric heat modes. (See Fig. 17, B as indicated.)

type

installed

range

of fan coil purchased.

for the size unit

installed.

Installer

This applies

AC or HP

must be selected:

1. AC - Air conditioner

2. HP-COMFORT - Heat Pump Comfort provides approximately 315 CFM per ton for higher normal heating air delivery temperature.
Provid6s approximately 350 CFM per ton cooling airflow for good humidity removal.
3. HP-EFF - Heat Pump Efficiency provides same airflow for heating and cooling modes to increase overall HP efficiency; approximately 350
CFM per ton,
The factory setting is AC. (See Fig. 17, C as indicated.)
D.

ACtHP CFM ADJUST - Select Medium, Low, or High Airflow

To provide airflow at rates described above, the AC/HP ADJUST select is factory set to the nominal(nom) tap. The adjust selections HIA,O will
regulate airflow supplied for all operational modes, except non-heat pump heating modes. HI provides 15 percent airflow over nominal unit size
selected and IX) provides 10 percent airflow below nominal unit size selected. Adjust selection options are provided to adjust airflow supplied to
meet individual installation needs for such things as noise, comfort, and humidity removal. (See Fig. 17, D as indicated.)
mll--

LOW VOLTAGETERMINAL BLOCK"_
PRINTED CIRCUIT BOARD--'___

AuxHEAT
ION/CFM

•

o_
•

SYSTEM

TYPE

L.,!_!..,,L

_,
_
_
AC*_PCF_A[_JUST
I "

O_OFF

II{¢u_I G

DELAy

_5275

Fig. 17--Detail of FV4A Printed-Circuit
ON/OFF DELAY - Select desired time delay profile

Board

Four motor operationdelay profdesare provided to customizeand enhancesystemoperation.(See Fig. 17, E as iadicated)
Selection options are:
1. The standard 90 sec off delay (Factory setting) at 100 percent airflow.
2. No delay option used for servicing unit or when a thermostat is utilized to perform delay functions.
3. A 30 sec on delay with no airflow/90 sec off delay at 100 percent airflow profile is used when it is desirable to allow system coils time
to heat-up/cool-down in conjunction with the airflow.
4. ENH, enhanced selection, provides a 30 sec on delay with no airflow/pins 150 sec at 70 percent airflow/no
This profile will minimize cold blow in heat pump operation and could enhance system efficiency.
F.

CONTINUOUS

off delay for added comfort.

FAN - Select desirecl fan speed when thermostat is set on continuous fan

NOTE: If installed with a 2-speed outdoor uniL do not select HI speed continuous fan. If HI is selected, low speed compression will also run HI
speed possibly resulting in insufficient dehumidification.
1. LO speed - factory setting, 50 percent cooling mode airflow.
2. MED speed - move connector to MED, 65 percent cooling mode airflow.
3. HI speed - move connector of HI, 100 percent cooling mode airflow. (See Fig. 17, F as indicated.)
G.

Low-Voltage

Circuit Fusing and Reference

The low-voltage circuit is fused by a board-mounted 5-amp automotive fuse placed in series with the transformer SEC2 and the R circuit. The C
circuit of the transformer is referenced to chassis ground through a printed circuit run at SECt connected to metal standoff marked with ground
symbol.
H.

Basic Fan Coil Configuration

The following basic configuration of the fan coil will provide ARI rated performance of the heat pump:
1. AUX HEAT KW/CFM - Select the heater range for the size electric heater installed.
2. AC/HP SIZE - Select system size installed.
3. SYSTEM TYPE - Select system type HP-EFF.
4. AC/HP CFM ADJUST - Select NOM.
5. ON/OFF DELAY - Select 0/90 profile.
6. CONTINUOUS
L

COMFORT

FAN - Select desired fan speed when thermostat is set to continuous fan.

OPTIONS - WARMER HEATING AND SUPER DEHUMIDIFY

(See Fig. 21 for Quick Reference Guide)

The FV4A Fan Coll provides better than average humidity control and heated air temperature. This configuration will improve the comfort
provided by the heat pump system ff more humidity removal or ff warmer heating air is desired. While providing this improved comfort, the heat
pump system will operate efficiently, but not at the published HSPF or ARI SEER efficiency.
m12--

ELECTRIC

HEAT

CONNECTOR

A95275
Fig. 18_PCB
The following fan coil configuration is recommended

Wiring Arrangement

for maximum heating and cooling/dehumidifying

comfort: (See Fig. 17.)

1. AUX HEAT KW/CFM - Select narrowest heater range to match size of electric heater installed (skip this step if no heater is installed).
2. AC/HP SIZE - Select system size installed.
3. SYSTEM TYPE - Select system type HP-COMFORT

(for heat pump system) or AC (for air conditioner system).

4. AC!HP CFM ADJUST - Select LO.
5. ON/OFF DELAY - Select ENH profile.
6. CONTINUOUS

FAN - Select desired fan speed when thermostat is set to continuous fan.

7. If the fan coil is installed with Intelligent Heat Staging capable electric heaters, remove jumper J2. (See Fig. 17.)
NOTE: If configuring

to run warmer heating, do not remove jumper J2 when using 5-, 8-, or 10-kw heaters.

8. Remove jumper J1 to activate dehumidify

modes.

9. Wire low voltage connections as shown in Fig. 9, 10, I I, or 12.
10. Configure Thermidistat (or capable zoning system) following its installation
This configuration provides die following comfort enhancements:

instructions for Super Dehumidify

operation.

a. A 30 second blower on delay with 150 seconds at 70 percent airflow to allow die indoor coil to warm up or cool down before the blower
is asked to deliver 100 percent airflow reducing the cold blow sensation at start up in heating and allowing the indoor coil to more quickly
reach wet coil operating conditions in cooling.
b. No blower off delay eliminates cold blow winch may be associated with running die blower after shut down of the compressor and avoids
re-evaporation of condensed moisture after cooling/dehumidifying
operation.
c. Lower airflow while the compressor is running to reduce draft effects and increase heating air temperature and hnproved humidity cona'ol
daring cooling operation.
--13---

d. Intelligent

Staging of the electric heater elements to more closely match heating load _;luiroments
air temperatures.

PROCEDURE

g--ACCESSORY

Electric

Accessory

and provide more consistent heating

INSTALLATION

Heaters

Electric heaters may be installed with the FV4A Fan Coil per instructions supplied with electric heater package. See unit rating plate for
factory-approved electric heater kits.
NOTE: Units installed without electric heat should have a field-supplied sheet metal block-off plate covering the heater opening. This reduces
air leakage and formation of exterior condensation.
B. Auxiliary Terminals
The AUX and HUM terminals on the Easy Select Board are tied direcdy to the G terminal, and provide a 24-vac signal whenever the G terminal
is energized. (See Fig. 17 and 18.) During Superdehumidify mode, the G signal is not present and the auxiliary terminals are not energized. If the
installation includes the use of this operating mode, do not use these terminals to control accessories. See Electronic Air Cleaner and Humidifier
sections for further information.
C.

Electronic

Air Cleaner

Connections

The AUXI and AUX2 terminals are not always energized during blower operation, as described above. When using an electronic air cleaner with
the FV4A Fan Coil, use Airflow Sensor part No. KEAAC0101AAA. The airflow sensor turns on electronic air cleaner when the fan coil blower
is operating.
D.

Humidifier/Humidistat

Connections

Easy Select Board terminals HUM1 and HUM2 are provided for direct connection to the low-voltage control of a humidifier through a standard
humidistat. (See Fig. 19.) These terminals are energized with 24vac when G thermostat signal is present. (See Fig. 20.) Alternately, the 24-vac
signal may be sourced from the W and C terminal block connections when electric heaters are used as primary heating source. When using a
Thermidistat TM Control, Zone Perfect Plus or Comfort Zone II, the 24-vac signal may be sourced directly from the Thermidistat HUM terminal.
(See Fig. 9, 10, 11, and 12.)
HUMIDISTAT

HUM 1

(c)

2_VAC

TO HUMIDIFIER

HUM 2

(G)

HUMIDIFIER

WIRING
A95317

Fig. 19_Humidifier

Wiring

EASY SELECT
BOARD TERMINAL
BLOCK

I UI4

I----

....

---- HUMIDISTAT
I

REMOVE -_

;----

....

JUMPER
A95316

Fig. 20_Humidistat
E.

Dehumidify

Capability with Standard

Wiring for De-Humidify Mode

Humidistat Connection

Latent capacities for systems using the FV4A Fan Coil are better than average systems. If increased latent capacity is an application requirement,
the field wiring terminal block provides connection terminals for use of a standard humidistat. The FV4A Fan Coil will detect the humidistat
contacts opening on increasing humidity and reduce its airflow to approximately 80 percent of nominal cooling mode airflow. This reduction will
increase the system latent capacity until the humidity falls to a level which causes the humidistat to close its contacts. When the contacts close,
the airflow will return to 100 percent of the selected cooling airflow. To activate this mode, remove Jumper Jl and wire in a standard humidistat.
(See Fig. 20.)
F.

Dehumidify

and Super Dehumidify

Capabilities

This model fan coil is capable of responding to a signal from indoor system control (thermostaL Thermidistat, zoning control) to operate in comfort
control modes such as Super Dehumidify Mode. Consult literature provided with indoor system control to determine if these operating modes are
available, and to see control set up instructions. No special setup or wiring of fan coil is required.
PROCEDURE

10_FV4A

FAN COIL SEQUENCE

OF OPERATION

The FV4A will supply airflow in a range which is more than twice the range of a standard fan coil. It is designed to provide nominal cooling
capacities at a 50°F evaporator tempemtare and the required airflow which enables it to match with 4 air conditioner or heat pump system sizes.
Table 2 outlines the CFM range for the different FV4A Fan Coil sizes.
--14--

Table

Range

for FV4A

Units

SYSTEM SIZES

CFM RANGE

FV4ANF002

024, 030, 036

450-1275

FV4ANF003

024, 030, 036, 042

525-1475

FV4ANF005

036, 042, 048

550-1700

FV4ANB006

042, 048, 050

550-2150

Continuous

Fan

•

Thermostat closes circuit R to G.

•

The blower runs at continuous fan airflow.

2_FM

FAN COIL SIZE

Cooling Mode - Single speed
If indoor temperature is above temperature set point and humidity is below humidity set poinL thermostat closes circuits R to G, R to Y/Y2
and R to O.

•
C.

The fan coil delivers single speed cooling airflow.
Cooling Mode - Dehumidification

•

If indoor temperatam is above temperature set point and humidity is above humidity set point, thermostat or Thernlidistat
to G, R to O, and R to Y/Y2, and humidistat or Tbermidistat opens R to DH.

•

The fan coil delivers airflow which is approximately 80 percent of the nominal cooling airflow to increase the latent capacity of the system.

Cooling Mode - Super Dehumidify Operation

(See Fig. 22 for Quick Reference

closes circuits R

Guide)

NOTE: The indoor control used, such as ThermidistaL must be capable of providing Super Dehumidify operation mode and control must be
configured as outlined in its installation instructions. Consult indoor control literature to determine if control is capable of providing Super
Dehumidify inputs and for configuration instructions.
If the indoor temperature is below the temperature set point and the humidity is above the humidity set point, the Thermidistat closes circuit R
to O, opens circuits R to DH and R to G, and cycles circuit R to Y/Y2 (for single speed system R to YI, or R to YI and Y/Y2 for 2-speed system).
The ICM2 motor reads the G signal to the fan coil while the heat pump is operating, (circuit R to Y/Y2 for single speed system, R to Y1 or R
to Y 1 and Y/Y2 for 2-speed system), closed (24 vac). If circuit R to G is closed (24 vac), the motor will deliver airflow at the full cooling or cooling
plus dehumidify mode requested value. If circuit R to G is open (0 vac) for super dehumidify mode, the motor delivers reduced airflow to maximize
the humidity removal of the system while minimizing overeooling.
E.

Electric Heat Heating Mode

•

Thermostat closes circuit R to W/WL or W2.

•

The fan coil delivers the selected electric heat airflow.

g. Heat Pump Heating Mode - Single speed
• Thermostat closes circuits R to G and R to Y/Y2.
•
G.

The fan coil delivers single speed heat pump heating airflow.
Heat Pump Heating with Auxiliary Electric Heat

Thermostat closes circuits R to G, R to Y/Y2 and/or R to Y1 with R to W/W1 or W2 (and R to O in the case of defrost).
In the event that electric heating is called for by the thermostat while the beat pump is also operating in either heating or defrost modes, the motor
will modify its airflow output, if necessary, to provide an airflow which is def'med as safe for the operation of the electric beater during heat pump
operation. That airflow is the greater of the heat pump beating airflow and the electric heater only airflow.
PROCEDURE

11--TROUBLESHOOTING

ICM MOTOR AND CONTROLS

CAUTION: High voltage is always present at motor. Disconnect power to unit before removing
connectors or servicing motor. Wait at least 5 min after disconnecting power before opening motor.

or replacing

The ICM motor used with this product contains two parts: the control module and motor winding section. Do not assume the motor or module
is defective if it will not start. Go through the steps described
below before replacing control module, Easy Select Board or entire motor. The
control module is available as a replacement
part.
A.

If motor

turns

slowly:

1. Replace

panel. Motor may appear

2. It is normal

operation

to run slowly

to run noticeably

slower

if access

panel is removed.

if G terminal

is not energized

in cooling

or beat-pump

modes.

B. ff motor does not run:
Turn off power

and check

the following:

1. Check

5 amp fuse on Easy

2. Check

for 24vac

3. Check

all plugs

Select

Board.

on SEC1 and SEC2.
and receptacles

If no voltage

for any deformation

is present,

check

transformer.

which could cause

--15---

loose connections.

Be sure plugs

are fully

seated.

Table 3_FV4A

Fan Coil Airflow Delivery (CFM) in Cooling
OPERATING

tlN1T
SIZE

OUTDOOR
UNIT
CAPACITY

Mode

MODE
Two-Speed
Application

Single-Speed
Application

High Speed

002

018
024
030
036

Nominal
A/C
Cooling
525
700
875
1050

A/C
Cooling
Dehumidity
420
560
700
840

003

024
030
036
042

700
875
1050
1225

560
700
840
980

005

030
036
042
048

875
1050
1225
1400

700
840
980
1120

0O6

036
042
048
060

1050
1225
1400
1750

840
980
1120
1400

Nominal
A/C
Cooling

A/C
Cooling
Dehumidity

1100

FAN ONLY
LO/MED/HI

Low Speed

880

A/C
Cooling
Dehumldity

680

545

1100

880

680

545

1100

880

680

545

1470

1175

910

725

11130

880

745

595

1470
1835

1175
1470

995
1240

795
995

350/350/525
350/455/700
440/570/875
525/680/1050
4151455/700
440/570/875
525/680/1050
610/795/1225
440/570/875
525/680/1050
610/795/1225
700191011400
525/745/1050
610187011225
700/995/1400
87511240/1750

NOTE
1. The above alrltews result withthe AC/HP CFM ADJUST selectjumperset on NOM.
2. Airflowcan be adjusted+15 percent or -10 percent by selectingHI or LO respectivelyfor all modes except fan only.
3. Dry coil at 230 voltsand with 10kw heater andfl_terirtstalled.
4. Airflowsshown are at standardairconditions.

Table

4---FV4A

Fan Coil Airflow

Delivery

(CFM)

OPERATING
UNIT
SIZE

OUTDOOR
UNIT
CAPACITY

in Heat

Pump

Only Heating

Mode

MODE
Two-Speed
Application

Single-Speed
Application

High Speed

0O2

018
024
030
036

Heat Pump
Comfort
525
700
875
1050

Heat Pump
Efficiency
420
560
700
840

0O3

024
O30
036
042

700
875
1050
1225

560
700
840
980

005

030
036
042
048

875
1050
1225
1400

700
840
980
1120

O06

036
042
048
060

1050
1225
1400
1750

840
980
1120
1400

Heat Pump
Comfort

990

FAN ONLY
LO/MEDtHI

Low Speed

Heat Pump
Efficiency

1100

Heat Pump
Comfort

615

Heat Pump
Efficiency

680

990

1100

615

680

990

ll00

615

680

1320

1470

820

910

990

It00

670

745

1325
1655

1470
1835

895
1120

995
1240

350/350/470
350/410/630
440/510/785
525/615/945
41514151630
440/510/785
525/615/945
610/715/1100
440/510/785
525/615/945
610/715/1100
700/820/1260
525/670/945
610/780/1100
700/895/1260
875/1120/1575

NOTE
1. The above airflows result with the AC/HP CFM ADJUST select jumper set on NOM.
2. Airflow can be adjusted +15 percent or -10 peccent by selecting HI or LO respectively fo¢ ell modes except fan only.
3. Dry coil at 230 volts and with t0kw heater and filter installed.
4. Airflows shown are at standard air conditions.

4. Verify that approximately

230vac is present at motor.

5. Verify low-voltage control signals to motor. The motor receives its control signals through the 12-pin plug (PL-I) on Easy Select Board
and 16-pin plug on wiring harness. (See Troubleshooting Example.) The combinations of pins energized will determine motor speed. (See
Fig. 20.) See Table 7 for circuit board, low-voltage screw terminals energized and for voltage present at each pin on 12-pin plug (PL-I).
See Table 7 for pin number on 16-pin plug which should have voltage when Easy Select Board screw ternunals have 24vae.
C.

Use following procedure to check control signals:

THERMOSTAT
1. Remove all thermostat wires from Easy Select Board.
2. Jumper screw terminals (I at a time): R-G, R-Y/Y2. R-Y I, R-WI. If motor mns in all cases, thermostat is miswired, contignredincmrecfly
or defective. If motor runs in some cases, but not others, continue to check wiring harness and circuit board.
--1_-

Table 5--F'V4A Airflow Delivery (CFM)
OUTDOOR
UNIT
CAPACITY
BTUH

FAN
UNIT
SIZE

002

003

FAN
UNIT
SIZE

ELECTRIC
0-5

RANGE
0-15

0-20

NOM

18,000

625

675

24,000

650

725

835

725

835

875

30.(300

815

905

1040

905

1040

900

1040

1100

36.000

980

1085

1250

980

1085

1250

980

1085

1250

I100

1100

1250

24,000

675

725

835

875

30,000

815

905

1040

875

905

1040

11130

1100

36,000

980

1085

1250

980

1085

1250

1100

11(30

1250

1225

1250

42,000

1140

1270

1460

1140

1270

1460

1140

1270

1460

1225

1270

1460

NOM

30,0_0

975

1040

1100

36,000

980

1085

1250

42,000

1140

1270

48.000

1305

1450

36.000

1100

42,000

1140

48.000
60,000

006

OUTDOOR
UNIT
CAPACITY
BTUH

005

HEATER

0-10

ELECTRIC
0-10

HEATER

NOM

RANGE

0-15

0-20

NOM

0-30

NOM

1100

HI
*

1100

1250

t460

1140

1270

1460

1250

1270

1460

1500

1665

1305

1450

1665

1305

1450

1665

1500

1665

1250

1350

t350

1270

1460

1350

1460

1525

1305

1450

1665

1350

1450

1665

1525

1665

1750

1630

1810

2085

1630

1810

2085

1630

1810

2085

1750

1810

2085

* AiR,ow not recommended for heater/system size.
NOTE: LO, NOM, and HI refer to AC/HPCFM
ADJUST selection.

Table 6---FV4A

CFM

ItEAT PUMP
UNIT
SIZE

FAN
COIL
UNIT

Minimum CFM for Electric Heater Application
HEATER

SIZE KW

8, 9, 10

18,20

725

875

Heater Only
018

625

024

650

725

875

030

80O

875

1040

036

970

1040

Heater Only
024

675

700

1050

675

875

1050

030

800

875

1100

036

975

1100

1225

042

1125

1225

Heater Only
030

675

700

1050

8OO

875

11(30

002

003

005

036

975

11130

1225

042

1125

1225

24, 30

1400

048

1305

1400

Heater Only
036

1050

1750

1100

1350

042

1125

1350

048
060

1300

1350

1465

1750

t625

1625

1750

OO6

NOTES:
1. Heater Only-Air conditioner with electric heater application.
2. 111ese airflows are minimum acceptable airflows as OL listed. ActuaJ airflow delivered will be per airflow delivery chart for Electric Heating Modes.

WIRING HARNESS
1. Shut

off power

to unit;

2. Remove

5-pin plug

3. Remove

16-pin

from

4. Replace 5-p'm plug
5. Check

for

from

wait

5 rain.

motor.

motor.
and turn

power

on.

appropriatevoltageson 16-pin

connector

with

screw terminals

jumperod. (See Table

7 for values

and see

examples below.)

inspect wiring harness for loose pins or damagedplastic that could cause poor connections.
If
connections are good, either control module or motor is defective.If proper signals are not present, check circuit board using procedure below:
If signals check correctly

and

motor

does

not

run,

ml7D

J1 JUMPER - PULL FOR
DEHUMIDIFiCATiON CONTROL-J2 JUMPER - PULL FOR-HEAT STAGING

EASY SELECT

AC_P

;I
°i tl
z 71;I
IW'lw'
sysn_M

DEHUMIDIFICATION INPUT

--Z ZEATSTAGEt

AUX HEAT I,;WK_M

lly,t_E

AUXILIARY HEAT STAGE 2

LOW SPEED COMPRESSOR

-SINGLE OR HI SPEED COMPRESSOR
OW VOLTAGE SCREW TERMINALS

I_o_"_
o
oo
o"_

RFALRSING VALVE

COMMON

_'"_ _
oo

PIN 12

%I IBIT1DITII I

'_ ____

I_
12-PIN CONNECTOR
(PL-1)

16-PIN PLUG

PIN 1

A00114

Fig. 21_Control
Table 7--Wiring

Signals (Easy Select Board & 16-Pin Plug)
Connections

of FV Fan Coil Wiring Harness

I6-LN PLUG ON WIRING HARNESS TO MOTOR

Pin # on 16-Pln Plug

WIRING HARNESS CONNECTION TO EASY SELECT BOARD

Description

Cowmon

Auxiliary Heat Stage 1

Pin 3 on 12-Pin Plug
or Set-up Selection

Wire Color

Pin 9 on PL-I

Brown

Pin 7 on PL-I

Violet

Common

Pin l0 on PL-1

Orange

On/Off Delay Selection

White

AC/HP Size Selection

Blue

pin 3 on PL-1

Black

AC/HP CFM Adjust
Selection

Black

Low Speed AC or HP

Signal on Pin with
Screw Terminal
JILrllpei'ed
to R*

24VAC**

(-) 12VDC**

Not Used

N/A

Not Used

System Type Selection

Orange

Dehumidify
Aux Heat Size
Selection

Pin 12 on PL-I
Aux Heat Size
Selection

Gray

24v AC

Pin 8 on PL-I

Red

24VAC continuous

Pin 4 on PL-I

White

24VAC**

Pin 2 on PL-I

Yellow

(-) 12VDC**

Pin I on PL-1

Green

24VAC**

N/A

Hot Used

Auxiliary Heat Stage 2

Y/Y2

Not Used

Single Speed AC or
HP, High Speed
2-Speed AC or HP
Fan

0V (24VAC on no call)

Violet

"Check voltages with 16-Pin Plug disconnected from motor.
"* These signals will start motor.

12-PIN PLUG (PL-1) ON EASY SELECT BOARD
1. Unplug harness from board.
2. Check for appropriate voltages on pins with Easy Select Board screw terminals jumpered. (See Table 7 for values and see example below.)
If proper signals am not present, replace Easy Select Board. If present at board and not at 16-pin connector, wiring harnessis defective.
TROUBLESHOOTING EXAMPLE:
Motor is not runningon a call for beat-pump heating. System is a single-speed beat pump.
I. After performing checks in Thermostatsection, follow steps 1 thai 5 in WiringHarnesssection. Then proceed with example.
--18---

LOW VOLTAGE

TERMINAL

EASY SELECT

Ill _

AC_HP CFM AOJUST

C_F

F "_!

•

I.Configuration
T aps
(See Installation
Insuucti
ons,fordetailed description.)
A. AUX HEAT - Set for beater size (Ex: 0-10 for 10 kw)
B. AC/HP SIZE - Set for size of outdoor unit
C. SYSTEM TYPE - Select "HP COMFORT"
D. ACfliP CFM ADJUST - Sel_t "LO"
E. ON/OFF DELAY - Select "ENH"
F. CONTINUOUS
FAN - Select desLmd speed
2. [nslall heater with Intelligent Heat Staging.. and remove
Jumper J2. except when using 5-. 8-. or 10-kw bearer.
3. Remove Jumper Jlm acdvate all dehumidify modes.
4. Complete wiring and install outdoor temperature sensor
according to Installation Instructions.

BLOCK "_.

uoL_FAN

MOLEX 12-PIN CONNECTOR

I. Set "DIP Switches" - Set the dip switches (back of Tbermidistat
Control Board) appropriately for specific system being installed.
2. Tbemaidistat Control Coatimgunradons
(See"rhernuths_{
TM Contro]lnstalJadon
[.sL,1lellons for
detailed description.)
• Option 5 (Variable Speed Motors) - set to ON
• Opdon 7 (Super Dehumidifyt ÷ set to ON
- Opdon 9 (Intelligent Heat) - set to ON if installing with
a single speed heat pump
• option 12 (Heaters during De fros0 - setting "2" is
suggested for all heaters
• opdon 16 - On R-22 systems set to ON for warmer heat
below 40 ° F. For Puron appHcatlons, set to OFF.
• Option 17 - Select progranmaable or non-programmable mode.
3. Set desired humidity level on front of Thetmldistat
(50 to 55% RH recomn_ndggl).
For dehumidification
in
cooling, both "dhu" and "cool" must be displayed.
J

A98510

Fig. 22_et-Up

Instructions

for Warmer Heating

Temperatures

and Super Humidity Control in Cooling

2. With all thermostat wires removed from Easy Select Board, place a jumper wire between R and Y/Y2 low-voltage screw terminals on the
Easy Select board.
3. Check Table 7 for pin number on 16-pin connector associated with the Y/Y2 signal. The correct pin is #14. The far fight column shows
that (-) 12vdc should be present between pin #14 and pin #1 (common) on the 16-pin connector.
4. Set meter to read DC voltage. Place meter between pins #1 and #14 and cheek for (-) 12vdc (common side of meter on pin #1). If signal
is present, the problem is in the module or motor. If signal is not, problem is either in wiring harness or Easy Select Board.
These steps can be repeated for other modes of operation.
To check Easy Select Board:
1. Leave jumper wire in place between R and Y/Y2.
2. Check Table 7 under "Wiring Harness Connection to Easy Select Board" column and row for pin #14 to see pin# on Easy Select Board
that should have voltage. The correct pin is #2. The column on far fight will show voltage that should be present between pin #2 and #9
(or #10 common).
3. Place meter between pins #2 and #9 on Easy Select Board and check for (-) 12vdc.
4. If voltage is present, the wiring harness is bad; if not, the Easy Select Board is had.
D.

Verify Motor Winding Section:

Before proceeding with module replacement, check the following to ensure motor winding section is functional. With control module removed
and unplugged from winding section:
1. The resistance between any 2 motor leads should be similar.
2. The resistance between any motor lead and the unpainted motor end plate should be greater than 100K ohms.
If motor winding section fails one of these tests, it is defective and must be replaced.

START-UP PROCEDURES
Refer to outdoor unit InstallationInstructions for system start-upinstructions and refrigerant charging method details.
_/

m19--

CARE AND MAINTENANCE
For continuing high performance, and to minimize possible equipment failure, it is essential that periodic maintenance
equipment. The only required maintenance that may be performed by the consumer is f'flter maintenance.

be performed on this

Z_ WARNING:
Disconnect all power to unit before servicing field wires or removing control package. The disconnect
(when used) on access panel does not disconnect power to the line side of disconnect, but does allow safe service to all
other parts of unit. If unit does not have a disconnect, disregard the foregoing. Instead, make sure that a disconnecting
means is within sight from, and is readily accessible from, the unit. Disconnect all electrical power to unit before performing
any maintenance or service on it. A failure to follow this warning can cause electrical shock, fire, personal injury, or death.
The minimum maintenance requirements for this equipment are as follows:
1. Inspect and clean or replace air tilter each month or as required.
2. Inspect cooling coil, drain pan, and condensate drain each cooling season for cleanliness. Clean as necessary. An inspection port is provided
on all A-coil delta plates. Remove plastic plug to inspect.
3. Inspect blower motor and wheel for cleanliness each heating and cooling season. Clean as necessary.
4. Inspect electrical connections for tightness and controls for proper operation each heating and cooling season. Service as necessary.
Consult Fan Coil Service Manual available from equipment distributor for maintenance procedures.
Z_ WARNING:
As with any mechanical equipment, personal injury can result from sharp metal edges, etc, therefore, care
should be taken when removing parts.
Using the Owner's/User Manual furnished in outdoor uniL the installing technician should explain system operation to the consumer with particular
emphasis on indoor fan coil operation sounds and filter maintenance.
PURON® QUICK REFERENCE

GUIDE
FOR INSTALLERS

AND TECHNICIANS

•

Puron refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and replacement components are
designed to operate with Puron.

•

Puron refrigerant cylinders are rose colored.

•

Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.

•

Puron 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.
Puron, as other HFC's, is only compatible with POE oils.
Vacuum pumps will not remove moisture from oil.
Do not use liquid-line filter driers with rated working pressures less than 600 psig.
Do not install a suction-line

fdter drier in liquid line.

POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
POE oils may cause damage to certain plastics and roofing materials.
Wrap all filter driers and service valves with wet cloth when brazing.
A liquid-line filter drier is required on every unit.
Do not use an R-22 TXV.
If indoor unit is equipped with an R-22 TXV, it must be changed to a Puron TXV.
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 filter driers.
DO not vent Puron into the a_anosphere.
Do not use capillary tube indoor coils.
Observe all warnings, cautions

O 2002 CAC/BDP

and bold text.

7310 W. Monis St., Indianapolis. IN 46231

imfv4a05

--20---

Book/Tab:

1/4,3di2e

Catalog

No. 63FV-4A4

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CARRIER Air Handler (indoor Blower&evap) Manual L0210273

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