CARRIER Air Handler (indoor Blower&evap) Manual L0602098

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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Fan Coil Units
FA4B, FB4B, FC4C
FH4B

NOTE:

Read the entire instruction manual be_bre starting the installation.

This symbol =-_ indicates a change since the last issue.
SAFETY
hnproper

installation,

adjustment,

alteration,

service,

CONSIDERATIONS

maintenance,

cause personal injury or property damage. Consult a qualified
The qualified installer or agency must use _actory-authorized
packaged
with kits or accessories
when installing.

or use can cause explosion,

fire, electrical

shock, or other conditions

which may

installer, service agency, or your distributor
or branch for information
or assistance.
kits or accessories
when modifying
this product. Refer to the individual
instructions

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing
these instructions
thoroughly
and follow all warnings or cautions attached to the unit. Consult
(NEC) for special requirements.

operations.
Have fire extinguisher
local building codes and National

Recognize safety information.
This is the safety-alert
the potential
for personal injury.

on the unit and in instructions

symbol

Z_X• When

you see this symbol

available.
Electrical

manuals,

Read
Code

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 or death. WARNING
signifies hazards which could result in personal
injury or death. CAUTION
is used to identify unsafe practices which would
is used to highlight
suggestions
which will result in enhanced
installation,

result in minor personal injury or product
reliability,
or operation.

and property

damage.

NOTE

z_x WARNING:
Before installing or servicing unit, always turn off all power to unit. There may be more than I disconnect
switch. Turn off accessory heater power if applicable. Electrical shock can cause personal injury or death.

INTRODUCTION
Models

FA4B,

FB4B,

FC4C,

and FH4B

are designed

for flexibility

and can be used

for upflow,

horizontal,

or downflow

(kit required

and

manufactured
and mobile home) applications.
These units are designed to meet the low air leak requirements
currently in effect. Because of this,
the units need special attention
in the condensate
pan and drain connection
area and when brazing tubing. These units are available for systems
of 18,000 through 60,000 Btuh nominal cooling capacity. Factory authorized
electric heater packages are available in sizes 3 through 30kw. See
Product

Data Literature

for available

accessory

kits.
HEATER

PACKAGES

This unit may or may not be equipped with an electric heater package. For units not eqnipped with factory installed heat, a _actory approved, field
installed UL listed heater package is available from your equipment
supplier. See unit rating plate for a list of factory approved heaters. Heaters
that are not factory approved could cause damage which would not be covered
heater package, minimum circuit ampacity (MCA) and maximum
fuse/breaker
heater.

The difference

is not an error

and is due to calculation

difference

under the equipment wan'anty. If_an coil contains a factory installed
may be different than units with a same size field installed accessory

per UL guidelines.

INSTALLATION
PROCEDURE

I--CHECK

Unpack

unit

Inspect

equipment

plate

and move

which

for damage

prior

proper

installation

contains

PROCEDURE
Unit

can stand

EQUIPMENT

to final location.

Remove

carton

to installation.

2--MOUNT

UNIT

or lie on floor,

or hang

taking

care not to damage

File claim with shipping

information.

Check

from ceiling

or walh

rating

Allow

company

unit.
if shipment

plate to be sure unit matches

space

for wiring,

piping,

is damaged
job

or incomplete.

Locate

unit rating

specifications.

and selwicing

unit.

IMPORTANT:
When unit is installed over a finished ceiling and/or living area, building codes may require a field-supplied
secondary condensate
pan to be installed under the entire unit. Some localities may allow as an alternative,
the running of a separate, secondary condensate
line. Consult
local codes
A.

Upflow

for additional

restrictions

or precautions.

Installation

If return air is to be ducted
unit, and floor.

through

Side return

on slope coil models.

Form:

is a field

option

IM-FA4B-02

a floor,

Cancels:

set unit on floor
Cut opening

IM-FA4B-01

over opening

and use 1/8- to 1/4-m. thick fireproof

per dimensions.

(See Fig.

Printed in U.S.A.

1.) A field-supplied

6-03

resilient

bottom

gasket

closure

Catalog No.

between

is required.

63FA-4B1

duct,

POWER
ENTRY
--_
OPTIONS
_

IELD SUPPLIED
SUPPLY DUCT

OWVOLOPTIONS

018-060
21-1N.
FRONT
SERVICE
--_
07024-1N. CLEARANCE

UNIT

0!8/024

12 In.

030/036

17 In.

042

!9 In.

UPFLOW/_

2°w
FIELD MODIFIED

PRIMA_
A

SIDE RETURN
LOCATION FOR

2 1/2"
UNITS ONLY
SLOPE COIL
UPFLOW/DOWNFLOW
SECONDARY DRAIN ,4

UPFLOW/DOWN FLOW J
PRIMARY DRAIN

FIELD SUPPLIED
RETURN PLENUM

A00069

Fig. l--Slope
B.

Coil Unit in Upflow Application

Downflow Installation

z_
CAUTION: The conversion of the fan coil to downflow requires special procedures for the condensate drains on both
A-coil and Slope units. The vertical drains have an overflow hole between the primary and secondary drain holes. This hole
is plugged for all applications except downflow, but must be used for downflow. During the conversion process, remove the
plastic cap covering the vertical drains only and discard. Remove the plug from the overflow hole and discard. At completion
of the downflow installation, caulk around the vertical pan fitting to door joint to retain the low air leak performance of the
unit. Failure to follow this CAUTION could result in minor personal injury or product and property damage.
In this application,

field

resilient

gasket,

NOTE:

To convert

conversion

1/8- to ii4-in,
units

Gasket

kit number

Horizontal

between

for downflow

use kit Part No. KFADC0201SLP.
duct, unit, and floor.
NOTE:

of the evaporator

thick,

applications,

For A-coils,

KFAHD0101SLP

is required

duct, unit,

refer to Installation

Z_
CAUTION:
length
and width.

Modular

kit along

with an accessory

is also reqnired

tbr all downflow

supplied
Use

with kit for proper

fireproof

applications

resilient

to maintain

gasket,

base kit. Use fireproof

installation.

For slope

i/8- to 1/4-in.

low air lea_low

with access

panels

facing up 02"down. The FH4B003

sweat

thick,

fan coils,
between

performance.

and 004 size units equipped

with accessory

can be disassembled

and limiting

HORIZONTAL

RIGHT

NOTE:

kit number

entrances

CONVERSION

i. Remove

blower

2. Remove

coil mounting

3. Remove

coil assembly.

and components
to installation
OF UNITS

KFAHD010ISLP

and coil access

panel

screw securing

coils are not

moved

separately

to installation

area for reassembly.

unit fi'om

be leveled
along
property
damage.

This process

accommodates

sites. (See Fig. 3.)
WITH

is required
and fitting

cooling

built for horizontal
left installation.
(See Fig. 2 and 6.) When suspending
for mounting metal support straps. (See Fig. 2.)

For optimum
condensate
drainage
performance
in horizontal
installations,
unit should
Failure
to follow
this CAUTION
could
result in minor personal
injury or product
and

units

holes

Gasket

Instructions

use kit Part No. KFADC0401ACL.

approved for horizontal
applications.
All other units are factory
ceiling, dimples in casing indicate suitable location of screws

small scuttle

downflow

Installation

Units must not be installed

NOTE:

using accessory

and floor.

SLOPE

COILS

for horizontal
panel.

coil assembly

slope coil conversion

(See Fig. 4.)

to right side casing

flange.

to maintain

low air leal_low

sweat

performance.

its

!RIMARY

FIELD _
SUPPLIED

DRAIN

HANGING

STRAPS
018-060 21-1N.
070 24-1N.
FRONT SERVICE
CLEARANCE
(FULL
FACE
[ OF UNIT)

UNIT

LOW VO LT
ENTRY
OPTIONS

'RR"2CCgSS
o

SECONDARY
DRAIN

POWER
ENTRY

OPTIONS

A00070

Fig. 2--Slope
4. Lay

fan coil unit on its right

5. Attach
6. Make

coil to casing

8. Align

side and reinstall
using

holes

sure liquid

from

kit KFAHD

with robing
and suction

HORIZONTAL

RIGHT
blower

2. Remove

metal

3. Remove

2 snap-in

and condensate
are in place

6. Convert

air-seal

a. Remove

OF UNITS
panels.

fitting

clips securing

4. Slide coil and pan assembly
horizontal

&ain

bracket

for horizontal

7. Install

horizontal

8. Slide coil assembly
9. Reinstall
to secure

door

to retain

the low air leak rating

of the unit.

and reinstall

air leaks

and cabinet

access

panels

sweating.

and fitting

Install

after

panel.

brazing.

A-COILS

pan. Remove

fitting panel.

(A) as shown
troughs

rail on left side of unit and reinstall

on coil support

rail on right side of unit.

right.

(A) and install

onto plastic

pan connections,
to prevent

from coil by removing

(B) fi'om coil seal assembly

hose

removed.

on the fitting

fi'om coil support

air splitter

f. Install

(See Fig. 4.)

in unit.

filter plate

condensate

pan down.

out of unit.

assembly

filter plate

seated

panel to condensate

c. Remove

e. Remove

condensate

previously

WITH

b. Remove

d. Install

with

Left Application

(See Fig. 5.)

A-coil

pan support

assembly

air-seal

is properly

connections

and coil access

5. Remove

screw

tube grommets

clip securing

in Horizontal

per kit instructions.

CONVERSION

l. Remove

door

Unit

coil assembly

coil mounting

sure the pan cap in the fitting

7. Add gaskets

Make

flange

Coil

air splitter

in horizontal

4 screws.

(See Fig. 5.)

by removing
(B) in place

right

3 screws.

(See Fig. 5

fi_ctory shipped

inset.)

of filter plate.

application.

on opposite

tube sheets.

spout.

pan on right side of coil assembly.
into casing.

Be sure coil bracket

2 snap-in clips to correctly
horizontal
pan.

position

on each corner

and secure

coil assembly

of vertical

pan engages

coil support

rails.

in unit. Be sure clip with large off;ets

is used

on right side of unit

BLOWER BOX

-2SCREWS
_2

SCREWS

BRACKET

2SCREWS

COIL BOX

A95293

Fig.

3--Removal

of Brackets

on Modular

Units

COIL MOUNTING

BLOWER
ASSEMB_

COIL
SUPPORT
RAIL

SLOPE COIL
SKI

•PRIMARY DRAIN
CONNECTIONS
SECONDARY

DRAIN
A03001

Fig.
10. Remove

two oval fitting

11. Remove

insulation

12. Remove

2 oval coil access

13. Install

condensate

4--Conversion

caps from

knockouts

pan fitting

for

Horizontal

left side of the coil, access

on right side of coil access
panel

plugs

caps (from

back side of the coil door. Make

and reinstall

Right

Applications

panel,

and fitting panel.

Using

Coil

panel

into holes

on left side of coil access

Step 10) in the right side of the coil door making

sure no insulation

a Slope

interferes

with seating
4

of the cap.

panel

and fitting

panel.

sure that the cap snaps and seats cleanly

on the

SEAL
CONNECTIONS
*¢

HORIZONTAL
RIGHT
APPLICATION

SUPPORT
RAIL

BRACKET

DRAIN
SUPPORT
BRACKET
SUPPORT
RAIL

BRACKET
DRAIN PAN
PRIMARY
HORIZONTAL RIGHT
SECONDARY
HORIZONTAL

DRAIN
RIGHT
A00071

Fig. 5_Conversion
14. Reinstall
between
Make
D.

for

Horizontal

access and fitting panels, aligning holes with tubing
fitting panel and vertical condensate
pan.

sure liquid

and suction

Manufactured

tube grommets

and Mobile

Home

l. Fan coil unit lnust

be secured

2. Allow

of 24" clearance

a minimum

3. Recommended

method

are in place
Housing

to the structure

lbr typical

Applications

connections

to prevent

air leaks

Using

and condensate

and cabinet

pan connections.

using field-supplied

self tapping
PROCEDURE
Connect

a--AIR

supply-air

of duct used,

screws

wall,

secure

applications

5/16-in.

using

5/16-in.

1/8-in. thick right-angle

lag screws.

screws.

lag screws.

Angle

Typical

brackets.

strap down and away fi'om back

both

Attach

Units equipped
Duetwork

duct over the outside

with vapor

with 20-30kw

Acoustical

Metal duct systems

to Pan coil using No.

of 3 4-in. flanges

joint.

If return-air

provided

flanges

on supply-air

are required,

install

opening.

Secure

duct to flange,

factory-authorized

accessory

using proper

fasteners

All products
selection

is installed,
use heat-resistant
unconditioned
space must be

barrier.

electric

heaters

reqnire

a 1-in. clearance

to combustible

materials

for the first 36 in. of supply

duct.

Treatment
that do not have a 90 ° elbow

4---ELECTRICAL
from the factory

terminal

(SPT),

utilize

and 10 ft of main duct to first branch

takeoff

may require

internal

acoustical

insulation

CAUTION:

and time delay relay

If a disconnect

or refrigerant
damage.

lining.

construction
as tested by

CONNECTIONS
a printed-circuit

When a factory-approved
accessory
control
connections
to be sure none were loosened

electrical
property

tbr type

kit.

As an alteruative,
fibrous ductwork
may be used if constructed
and installed in accordance
with the latest edition of SMACNA
standard on fibrous glass ducts. Both acoustical lining and fibrous ductwork shall comply with National Fire Protection Association
UL Standard 181 for Class 1 air ducts.
PROCEDURE

(See Fig. 7.)

DUCTS

and seal duct-to-unit

and covered

sides of Pan coil.

brackets

Use flexible
connectors
between
ductwork
and unit to prevent transmission
of vibration.
When electric heater
material for flexible connector
between
ductwork
and unit at discharge
connection.
Ductwork
passing through
insulated

clip

panels.

fan coil to wall stud using

and to wall stud using

metal

hardware.

all slack, and Pasten to wall stud of structure

b. If Pan coil is against

Be sure to reinstall

sweating.

a. If fan coil is away fi'om wall, attach pipe strap to top of Pan coil using No. 10 self tapping
of Pan coil, remove

A-Coil

Applications

from access

of securing

Right

components.

(TDR)

board

(PCB)

jumper.

which

To disable

has a low voltage

circuit

the TDR

sever the jumper

feature,

protective

fuse (5 amp),
wire JWl.

fan motor

speed

package has been installed, check all factory wiring per unit wiring diagram and inspect factory
in transit or installation.
If a different control package is required,
see unit rating plate.

switch

is to be mounted

Failure

to follow

this

on unit,
CAUTION

select
could

a location
result

where
in minor

drill

or fastener

personal

tap

(See Fig. 8.)

injury

will not

wiring

contact

or porduct

and

FACTORY
SHIPPED
HORIZONTAL
LEFT
APPLICATION

COIL
BRACKET
COIL
SUPPORT
RAIL
DRAIN
PAN
SUPPORT
BRACKET
COIL
BRACKET

HORIZONTAL
DRAIN
PAN
AIRSEAL
ASSEMB_

PRIMARY DRAIN
HORIZONTAL LEFT
SECONDARY DRAIN
HORIZONTAL LEFT

REFRIGERANT
CONNECTIONS

A00072

Fig. 6--A-Coil

in Horizontal Left Application

(Factory

Ready)

4" MAX

SECURE
COIL WALL
TO STRUCTURE
UNIT
AWAYFANFROM
PIPE

STRAP

(TYPICAL

BOTH

SIDES)

OR
UNtT

AGAINST

WALL

1/8-1N THICK
ANGLE
MOUNTING
BRACKET
(TYPICAL

DOWN
--

BASE

SECURE
ANGLE

BOTH

SIDES)

FLOW
KIT

(KFACB)

UNIT TO FLOOR
BRACKET
OR PIPE

STRAP

t
4" MAX
A02003

Fig. 7--A-Coil

Before proceeding
with electrical connections,
make certain that supply voltage, frequency, phase, and 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.

The unit nmst have a separate
the unit.

branch

Use copper

electric

circuit

wire

only.

with a field-supplied

disconnect

switch located

within

sight from and readily

accessible

from

o,
c7[_
R2
R3

o3
R6
R1 ] _)C5
R5_

D2
5_D1_

LR40061
A03010

Fig. 8--Fan
On units with a factory
control package.

installed

disconnect

with pull-out

Coil

removed,

Printed-Circuit

service

Board

and maintenance

can be safely

performed

on only the load side of the

z_
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

Line

Voltage

Failure

to do so will

without

electric

heat require

necessary
to supply the FA4B unit
which do not use electric heat.

For units without

result

in electrical

shock

causing

electric

1. Connect

208/230v

2. Connect

ground

the use of a factory-authorized
with

230-v

power

when

Power
electric

Control

CONNECTION

or death.

is not present.

This kit provides

This kit is required

the electrical

only on those

FA4B

heat:
power

wire

leads from

to unit

ground

field disconnect

to yellow

and black

stripped

leads.

lug.

NOTE:
Units installed without electric heat should
air leakage and formation of exterior condensation.
24-v

injury

Plug Kit (KFAPP0125PLG).

heat

3. If unit contains an electric heater, remove and discard power plug (if equipped)
plug fi'om unit wiring harness. (See Electric Heater Installation
Instructions.)

personal

Connections

FA4B units installed
connections
applications

off.

have a field-supplied

sheet metal

from

fan coil and connect

block-offplate

covering

male plug t'rom heater

the heater opening.

to female

This will reduce

System
TO UNIT

Wire low voltage in accordance
with wiring label on the blower. (See Fig. 9, 10, ll, 12, and 14.) Use no. 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 ft from the unit (as measured
along the low-voltage
wire), use No. 16 AWG color-coded,
insulated (35°C nfininmm) wire. All wiring
must be NEC
Refer

Class

to outdoor

TRANSFORMER
Transformer
connect
HEATER

1 and must

unit wiring

be separated

instructions

from

incoming

for any additional

power
wiring

recommendations.

INFORMATION

is _actory-wired

it to the 208v terminal

for 230v

operation.

For 208v

applications,

disconnect

the black wire

from

the 230v

terminal

on transformer

and

(See Fig. 15).

STAGING

CAUTION:
If W2, W3, and E on any 3 stage heater
thermostats
or any other situation,
emergency
heat relay
normally
in minor

leads.
procedure

(18, 20, 24, or 30kw), are individually
must be used. This relay is in kit Part

used with kit Part No. KHAOT0301FST
for 2 outdoor
personal
injury or product
and property
damage.

The controls are fi_ctory circuited for single-stage
3-stage use both kits Part No. KHAOT0201SEC

operation. For 2-stage
and KHAOT0301FST.

thermostat

system.

operation,

use outdoor

Failure

to follow

thermostat

connected
as with
No. KHAOT0201SEC
this

CAUTION

kit Part No. KHAOT0301FST,

When 2 stages are desired, cut W3 at the W2 wire nut, strip and reconnect
per the thermostat
kit instruction.
(See Fig. 12.) When
desired, cut the W2 wire nut off and discard. Strip W2, W3, and E and reconnect
per thermostat
kit instructions
(See Fig. 14).
NOTE:
When
KHAOT0201SEC

3 stages are used
nmst be used.

or anytime

the

E terminal

is not

tied

to W2,

the

emergency

heat

could

relay,

part

of outdoor

outdoor
and is
result

and for

3 stages
kit Part

are
No.

FAN COIL
CONTROL

THERMOSTAT
RED

GRY

[]
Wa
E
AIR COND.

A94058

Fig. 9--Wiring

Layout Air Conditioning
(Cooling Only)

Unit

FAN COIL
CONTROL

THERMOSTAT
RED

GRY

[2P
Wa
E
AIR COND.

A94059

Fig. 10--Wiring Layout Air Conditioning
(Cooling and l-Stage Heat)
--) C.

Manufactured

Unit

Housing

In Manufactured Housing applications, the Code of Federal Regulations, Title 24, Chapter XX, Part 3280.714 requires that supplemental electric
heat be locked out at outdoor temperatures above 40 degrees F., except for a heat pump defi'ost cycle. Refer to Fig. 13 for typical low voltage wiring
with outdoor thermostat.
D.

Ground Connections

z_ WARNING: According to NEC, ANSI/NFPA 70, and local codes, the cabinet must have an uninterrupted or unbroken
ground 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. If conduit connection uses reducing washers, a separate
ground wire must be used. Failure to follow this warning could result in electric shock, fire, or death.
NOTE:

Use UL-listed

accomplished
E.

Minimum

Units

than the minimum
replace
NOTE:

and conduit

CFM and Motor

with or without

Fan speed

conduit

by using grounding

selection

with motor

electric

fan speed

Speed

heaters

In low static

for connecting

in control

supply

wire(s)

to unit to obtain

proper

grounding.

Grounding

may also be

box.

Selection

require

a minimum

CFM.

Refer to the unit wiring

printed-circuit

board.

To change

label to ensure

that the fan speed

selected

is not lower

indicated.

is done at the fan relay
speed

connector

lugs provided

tap desired.

applications,

(See Fig. 16). Save insulating

lower

motor

speed

tap should

motor

cap and place
be used to reduce

speeds,

disconnect

on motor
possibility

fan lead used

lead removed
of water

All units have 3 motor speed taps. Low speed (red) is designed for mismatch
outdoor unit applications.
straight matched operations.
High speed (black) is used with high external static duct systems of straight
8

on relay

terminal

(SPT)

and

is designed

for

from relay.

being

blown

Medium
matched

off coil.

speed (blue)
systems.

FAN COIL
(CONTROL'

THERMOSTAT

HEAT PUMP
CONTROL

2k_ R
_G

[33[@[]
[]

Z;_c
W3
E

w2
O

[3-

A94060

Fig. 11--Wiring Layout Heat Pump Unit
(Cooling and 2-Stage Heat with No Outdoor Thermostat)
FAN COIL
(CONTROL'

THERMOSTAT

HEAT PUMP
CONTROL

z;_

[33-_c
[@[]
[]

W2
W3,,_,_

ODTS

[3-

A94061

(Cooling

PROCEDURE

5--REFRIGERANT

Fig. 12--Wiring Layout Heat Pump Unit
and 2-Stage Heat with 1 Outdoor Thermostat)

TUBING

Use accessory
tubing package
o1" field-supplied
tubing of refrigerant
grade. Suction robe must be insulated.
Do not use damaged,
dirty, or
contaminated
tubing because it may plug refrigerant
flow-control
device. ALWAYS
evacuate the coil and field-supplied
tubing to 500 microns
before opening outdoor unit service valves.

Z_
CAUTION:
A brazing
damage
to the unit surface
injury

or product

Units have sweat
1. Cut tubing
2. Insert

and

suction

shield MUST be used when tubing
sets are being brazed
to the unit connections
to prevent
and condensate
pan fitting
caps. Failure to follow
this CAUTION
could result in minor personal

property

damage.

and liquid

tube connections.

to con'ect

tube into sweat

Make

suction

tube connection

first.

length.
connection

on unit until it bottoms.

3. Braze connection
using silver bearing
Consult local code requirements.

or non-silver

bearing

brazing

materials.

Do not use solder

(materials

z_
CAUTION: Wrap a wet cloth around rear of fitting to prevent damage to TXV and factory-made
this CAUTION could result in minor personal injury or product and property damage.
£

which

melt

below

800°F).

joints. Failure to follow

FAN COIL
CONTROL)

THERMOSTAT

HEAT PUMP
(CONTROL

[]
[]
[]

G
C

C
W2
W3

[]
[]
[]
[]

U
O
Y
A03088

___>

(Cooling

Fig. 13--Wiring Layout Heat Pump Unit
and 2-Stage Heat for Manufactured Housing)
FAN COIL
'CONTROL'

TH ERMOSTAT

RED

HEAT PUMP
(CONTROL

R
R

[][]-

G
C

wH_ W2
[]

w3BL U
E
VIO

[]
[]

O
Y

EMERGENCY

HEAT RELAY
A94062

Fig.
(Cooling

PROCEDURE

6--REFRIGERANT

14--Wiring

and 2-Stage

FLOW-CONTROL

Layout
heat with

Heat

Pump

2 Outdoor

Unit
Thermostats)

DEVICE

z_
CAUTION: If using a TXV (FC4C factory installed) in conjunction with a single-phase
reciprocating compressor,
compressor start capacitor and relay are required. Consult outdoor unit pre-sale literature for start assist kit part no.
Replace

piston

if required.

Check

piston

size shown on indoor

unit rating plate

to see if it matches

required

piston

shown

on outdoor

unit rating

plate. If it does not match, replace indoor piston with piston shipped with outdoor unit. The piston shipped with outdoor unit is con'ect lbr any
approved indoor coil combination
(See Fig. 17). When changing piston, use a back-up wrench. Hand tighten hex nut, then tighten with wrench
i/2 turn. Do not exceed 30 ft-lbs.
PROCEDURE
To connect
disk. Clean

7--CONDENSATE

DRAINS

drains, the cap openings must be removed. Use a knife to start the opening near the tab and using pliers, pull the tab to remove the
the edge of the opening if necessary and install the condensate
line. Finally caulk around the lines where they exit the fitting to retain

the low leak rating

of the unit.
10

BLK

A94067

Fig. 15--Transformer

Connections

FAN

INSULATING

MOTOR
TAP

CAP

SPEED
LEADS

COMMON

SPEED
TAP
TERMINAL

WRAPPER

YELLOV_

FAN

DECK
A97529

Fig. 16--Fan

Coil Relay and Speed Tap Terminal

z_
CAUTION: The conversion of the fan coil to downflow requires special procedures for the condensate drains on both
A-coil and Slope units. The vertical drains have an overflow hole between the primary and secondary drain holes. This hole
is plugged for all applications except downflow, but must be used for downflow. During the conversion process, remove the
plastic cap covering the vertical drains only and discard. Remove the plug from the overflow hole and discard. At completion
of the downflow installation, caulk around the vertical pan fitting to door joint to retain the low air leak performance of the
unit. Failur to follow this CAUTION could result in minor personal injury or product and property damage.
Units are equipped
To prevent property

with primary and secondary
3/4-in. FPT drain connections.
For proper condensate
line installations
see Fig. l, 2, 4, 5, and 6.
damage and achieve optimum &ainage performance,
BOTH primary and secondary &ain lines should be installed and include

properly-sized
condensate
traps (See Fig. 18). Factory-approved
condensate
traps are available. It is recommended
the plastic condensate
pan. Finger-tighten
plus 1-1/2 turns. Do not over-tighten.
Use pipe dope.

that PVC

fittings

CAUTION: Shallow, running traps are inadequate and DO NOT allow proper condensate drainage.
Failure to follow this CAUTION could result in minor personal injury or product and property damage.

be used

(See Fig. 19.)

NOTE: When connecting condensate drain lines, avoid blocking filter access panel, tlms preventing filter removal. After connection, prime both
primary and secondary condensate traps.
i1

BRASS"-_

TEFLON
F

SEAL
PISTON

W- DISTRIBUTOR

PISTON

BRASS

RETAINER

HEXBODY

STRAINER

A94415

Fig. 17--Refrigerant

Flow-Control

Device (FC4C has TXV and Strainer)

UNIT

A03002

Fig. 18--Recommended

NOTE:
If unit is located in or above a living space where damage
pan should be installed underneath
the entire unit, and a secondary
pan. Any condensate
in this external condensate
some localities may allow the use of a separate
The owner of the structure
servicing or water damage

must be infomled
will occur.

Condensate

may result
condensate

Trap

from condensate
overflow,
a field-supplied,
external condensate
line (with appropriate
trap) should be run from the unit into the

pan should be &ained to a noticeable place. As an alternative to using an external condensate
pan,
3/4-in. condensate
line (with appropriate
trap) to a place where the condensate
will be noticeable.
that when condensate

flows from

the secondary

drain or external

Install traps in the condensate
lines as close to the coil as possible. (See Fig. 20.) Make sure that the outlet
to the condensate
pan to prevent condensate
from overflowing
the &ain pan. Prime all traps, test for leaks,
living

condensate

pan, the unit requires

of each trap is below its connection
and insulate traps if located above a

area.

Condensate
Consult

drain lines should

local codes

be pitched

for additional

PROCEDURE

8--ACCESSORIES

Air Cleaner

Electronic

downward

restrictions

at a minimum

slop of 1 in. for every

10 ft of length.

or precautions.

The Electronic Air (?leaner may be connected to fan coil as shown in Fig. 21. This method requires a field supplied transfomler.
Air Cleaner literature for kit requirements.
B.

See Electronic

Humidifier

Connect humidifier and humidistat to fan coil unit as shown in Fig. 22 and Fig. 23. The cooling lockout relay is optional (See Fig. 220
12

DO NOT USE SHALLOW

RUNNING TRAPS!
A03013

Fig. 19--Insufficient

Condensate

Trap

_FILTER
ACCESS
L

SECONDA_AyNDE_AIN WITH
APPROPRIATE TRAP REQUIRED
(USE FACTORY KIT OR
FIELD-SUPPLIED TRAP)

PRIMARY TRAP REQUIRE_XB_
(USE FACTORY KIT OR
FIELD-SUPPLIED TRAP OF
SUFFICIENT DEPTH.
STANDARD P-TRAPS ARE
NOT SUFFICIENT. SEE
FIGURE OF RECOMMENDED
CONDENSATE TRAP)
A03003

Fig. 20--Condensate
PROCEDURE
A.

9--SEQUENCE

Continuous

Thermostat

Cooling

Thermostat
When
C.

OF OPERATION

R to G. G energizes
relay

fan relay

on PCB which

completes

R to G, R to Y, and R to O (heat pump

G is de-energized,
Heat Pump

there

Heating

Heat Pump

Heating

G is de-energized
Electric

Thermostat
normally

is a 90 sec delay

blower

motor.

When

G is de-energized,

there is a 90

before

only).

fan relay

closes

with

Auxiliary

there

fan relay on PCB which completes

Electric

is a 90 sec delay

circuit

to indoor

blower

motor.

on fan relay.

belbre

circuit

to indoor blower

motor.

When

G is de-energized,

Heat
fan relay on PCB which
When W is de-energized,

_an relay

completes
circuit to indoor blower motor. W energizes
electric heat relay(s) open, turning offheater
elements.

opens.

Heat Mode

R to W. W energizes

contacts

G energizes
opens.

Mode

Heat or Emergency

closed

to indoor

Mode

energizes

Thermostat
energizes
R to G, R to Y, and R to W. G energizes
electric heat relay(s) which completes
circuit to heater element(s).
When

circuit

opens.

Thermostat
energizes R to G and R to Y. G energizes
there is a 90 sec delay before fan relay opens.
D.

Unit

Fan

closes

see delay belbre
B.

Trap and

electric
When

heat relay(s)

W is de-energized,

which

completes

electric

START-UP

circuit

heat relay(s)

to heater

element(s).

Blower

motor

opens.

PROCEDURES

Refer to outdoor unit Installation Instructions for system start-up instructions and refrigerant charging method details.
13

is energized

through

CONTROL
FAN RELAY
'230VAC

NONe

SPT

i
!

BOARD

NONC

2o8/23OVA0
_
COM

CONVERSIONKITI_

ToTRANSFORMERII I
BLOWER

__ I I

MOTOR

'-"_'--_

TO EAC
FROMMOLEX
PLUGAND
TRANSFORMER
(IN UNIT)

A03011

Fig. 21--Wiring

Layout of Electronic Air Cleaner to Fan Coil
FAN COIL
(CONTROL)

THERMOSTAT

HEATPUMP
(CONTROL)

4:3-_R
_G

[]-

_:3-0
W3

[]
[]
[]

1
1

I I

RELAY

FAN HU_

_HUMIDISTAT

A95294

Fig. 22---Wiring

Layout of Humidifier to Heat Pump

z:_
CAUTION: Never operate unit without a filter. Damage to blower motor or coil may result. 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. Failure to follow thid CAUTION could result in minor
personal injury or product and property damage.
CARE
To continue
Consult

your

high performance
local

and minimize

dealer as to the proper

possible
frequency

equipment

AND

MAINTENANCE

failure,

of maintenance

it is essential

contract.
14

that periodic

maintenance

be performed

on this equipment.

FAN COIL
CONTROL

THERMOSTAT
RED

GRY

W3
E
I

,'
[]

I
I
L---4

AIR COND.

I
I
......

FAN HUM_

11@?? I

z; L---_
A95295

Fig. 23--Wiring

Layout of Humidifier
with Electric Heat

to Fan Coil

SPDT
24VAC COIL
230VAC 15A

I Gel.
I
FAN RELAY

DEHUMIDISTAT
(OPENS ON RINSE)

TO
HIGH
SPEED
MOTOR

TO
LOW
SPEED
MOTOR
A03012

Fig. 24_Latent
The ability to properly perform maintenance
on this equipment requires
your dealer for maintenance.
The only consumer
selwice recommended

Capacity Control
certain mechanical
skills and tools. If you do not possess
or required
if filter replacement
or cleaning on a monthly

these, contact
basis.

7310 W. Morris St, Indianapolis,

IN 46231

imfa4b02

Book/Tab:

1/4,3d/2e

Catalog

No. 63FA-4B1

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CARRIER Air Handler (indoor Blower&evap) Manual L0602098

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