CARRIER Package Units(both Units Combined) Manual L0411028

User Manual: CARRIER CARRIER Package Units(both units combined) Manual CARRIER Package Units(both units combined) Owner's Manual, CARRIER Package Units(both units combined) installation guides

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NFATUNG

50HX
Heat Pump Units

& COOLING

SingMe Packaged
\isit_ v_v_carrier.corn

Installation, Start-Up, and Operating
50HX Sizes 024-060
NOTE:
Read
installation
This symbol

the entire

instruction

a change

-->indicates
TABLE

SAFETY

manual

belk_re

starting

the

since the last issue.

OF CONTENTS

< ONSIDERATIONS

Introduction

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

RE( EIVING

AND INSTALLATION

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

Trouble shooting ............................................................................

Start=L p Checklist .....................................

NOTE TO INSTALLER
Before the installation, READ THESE
INSTRUCTIONS
(AREFI_LLY
AND COMPLETELY
Also,
make sure the User's Manual and Replacement Guide are 1eft with
the unit after installation

(beck Equipment ......................................................................
IDENTIFY
UNIT ................................................................
INSPECT
SHIPMENT
........................................................

2
2
2

Provide Unit Support ................................................................
ROOF CURB & SLAB MOUNT .......................................

2
2

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

air-conditioning

Untrained

Rig and Place Unit ....................................................................
INSTALLATION
................................................................

3
5

cleaning
by trained

service

Connect

equipment,

observe

attached

Provide
Select

Install

Clearances
and Install

Ductwork

Condensate
Duct

Drain .......................................................

(onnections

CONFIGURING
(AL)

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

..........................................................
[NITS

FOR

DOVvTFLOW

DIS(HARGE-STANDARD

CONFIGURING

[NITS

CAL) DIS(HARGE-ECM
Install Electrical
Connection
HIGH°VOLTAGE

UNITS

FOR

(VERTI°

(024

DOVvE\TLOW

ERE-START-UP
START-UP

EDURES

FOR

208°V

10
12

primary

4. Connect

supply

can cause

1225

208-V

befbre

See unit wiring

3. Save d_e wire

5. Using

030
875

insulate

the

lead,

HIGH
VOLTAGE

]

*Knockout on rectangular-duct
panel units.
NOTE: For rectangular

panel units; entry hole on round-duct

duct knockout sizes, see Fig. 2-9.
C95036

Fig. 21=Typical
UNIT POWER
LEAD

Duct Panel Knockouts
UNIT LINE WIRE
SPLICE BOX

WIRE-BINDING
SCREW

CONTROLPOWER
SPLICE BOX
C95022

Fig. 22--Wiring

Splice Boxes

-->

Table3--ElectricalData--50HX
VOLTAGE
RANGE

COMPRESSOR

OFM

IFM

DUAL-POINT

SINGLE-POINT
POWER SUPPLY

ELECTRIC
HEAT

POWER

SUPPLY

(INCLUDING
UNiT
50HX
SSZE

SinglePoint
Max
Fuse
or
Ckt
Bkr

V=PH

(=SERIES, (60 HZ)
_F
USED)

Min

Max

RLA

LRA

FLA

SinglePoint
Wiring
MCA

SinglePoint
MOCP

UNIT

ONLY)

Heater

Unit

Heater

Only
Dual-

Heater

Unit

Only
Dual-

Unit

Only
Dual-

Point

Only

Point

Only

Max

Dual-

Max

Dual

Fuse
or

Point
MOCP

Point
MCA

Fuse
or

Point
MOCP

Point
Wiring
MCA

Ckt

Bkr

024-311

024-321

080

088

042

048-301

048=311

060

208/230-1

(See legend following

187

Electrical

253

112

121

150

160

200

264

208

321

560

540

730

880

104.0

129.0

109.0

169.0

2.0

2.6

3.1

7.2

3.75/5.00

18.1/20.8

403/434

45/45

5.60/7.50

27.1/31.3

51 0/565

7.50/100

36.1/41.7

625/695

3.75/5.00

18.1/20.8

5.60/7.50

27.1/31.3

7.50/100

Bkr

22.5/26.0

25/30

60/60

33.7/39.1

35/40

70/80

45.1/50.8

50/60

41 4/445

45/45

22.5/26.0

25/30

522/577

60/60

33.7/39.1

35/40

36.1/41.7

637/707

70/80

45.1/50.8

50/60

3.75/5.00

18.1/20.8

453/488

50/50

22.5/26.0

25/30

5.60/7.50

27.1/31.3

566/61

60/-

-/70

33.7/39.1

35/40

7.50/100

36.1/41.7

679/748

70/80

45.1/50.1

50/60

1130/15.0

54.1/62.0

904/100.3

100/100

67.9/78.1

70/80

3.75/5.00

18.1/20.8

483/51

60/60

22.5/26.0

25/30

5.60/7.50

27.1/31.3

566/61

60/-

-/70

33.7/39.1

35/40

7.50/100

36.1/41.7

679/748

80/80

45.1/50.1

50/60

1130/15.0

54.1/62.0

904/100.3

100/110

67.9/78.1

70/80

3.75/5.00

18.1/20.8

521/555

60/60

22.5/26.0

25/30

5.60/7.50
7.50/100

27.1/31.3
36.1/41.7

633/686
746/81

---

70/80
80/90

33.7/39.1
45.1/50.8

35/40
50/60

---

1130/15.0

54.1/62.0

971/107.0

100/110

67.9/78.1

70/80
100/110

150/200

72.2/83.3

1198/133.7

125/150

901/104.2

3.75/5.00

18.1/20.8

652/683

70/70

22.5/26.0

25/30

5.60/7.50

27.1/31.3

759/81

80/90

33.7/39.1

35/40

7.50/100

36.1/41.7

874/944

90/100

45.1/50.8

50/60

1130/15.0

54.1/62.0

1102/120.4

125/125

67.9/78.1

70/80

1318/145.9

100/110

150/200

72.2/83.3

3.75/5.00

18.1/20.8

582/61

5.60/7.50

27.1/31.3

7.50/100

150/150

901/104.2

60/-

#70

22.5/26.0

25/30

689/744

70/80

33.7/39.1

35/40

36.1/41.7

804/874

90/90

45.1/50.8

50/60

1130/15.0

54.1/62.0

1032/113.4

110/125

67.9/78.1

70/80
100/110

150/200

72.2/83.3

1248/138.9

125/150

901/104.2

3.75/5.00

18.1/20.8

5.60/7.50

27.1/31.3

720/755
833/885

---

90/100
100/100

22.5/26.0
33.7/39.1

25/30
35/40

7.50/100

36.1/41.7

946/101.5

100/110

45.1/50.8

50/60

1130/15.0
15 0/28 8

54.1/62.0
72.2/83.3

1171/126.9
1396/153.5

---

125/150
150/175

67.9/78.1
90 1/104.2

---

Data chart)

17.4

25/25

18.5

25/25

22.8

30/30

23.8

35/35

29.5

45/45

42.3

50/50

35.3

45/45

48.7

80/80

---70/80
100/110

EXAMPLE: Supply voltage is 460-3-60.
A 8 C
AB = 452 v

LEGEND
FLA
-- Full Load Amps
LRA
-- Locked Rotor Amps
MCA
-- Minimum CircuitAmps
MOCP -- Maximum Overcurrent
RLA
-- Rated Load Amps
CKT BKR -- Circuit Breaker

AC = 455 v

Average Voltage =
BC = 464 v

Protection

3
1371
3

= 457

NOTES:

Determine maximum deviation from average 'voltage.
(AB) 457 452=5v
(BC) 464 457=7v
(AC) 457 455=2v
Maximum deviation is 7 v.

1. tn compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 430 and 440), the overcurrent protective device for the
unit shall be Power Supply fuse. Canadian units may be
fuse or circuit breaker.
2. Minimum wire size is based on 60 C copper wire. tf other than
60 C wire is used, or if length exceeds wire length in table,
determine size from NEC.
3. Unbalanced
3-Phase Supply 'Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine
the percentage of voltage imbalance.

Determine

percent of voltage imbalance.
7
% Voltage Imbalance = 100 x -457
: 1.53%
This amount of phase imbalance
maximum allowable 2%.

% Vottage imbalance
= 100 x

452 + 464 + 455

max voltage deviation from average voltage
average voltage

is satisfactory

as it is below the

IMPORTANT:
tf the supply voltage phase imbalance
is
more than 2%, contact your local electric utility company
immediately.
c99o24

------]_i

®
©

Eli

THERMOSTAT
AND SUBBASE

UNtT CONTROL POWER
SPLICE BOX
C99056

Fig. 23--Control=Voltage

Connections

GROUND

LUG

(IN SLP]CE

BOX)

GROUND
LEAD

SINGLE=PHASE
CONNECTIONS
TO DISCONNECT
PER NEC

........

_/_-_

........

zQ'==" YEL--

3-PHASE
CONNECTIONS

L3 ........
NOTE:

LEGEND
NEC =

National

- - -

Electrical

Use copper

BLK--

wire only'.

Code

Field Wiring
Splice Connections
C99057

Fig. 24_High-VoRage

Connections

PRE-START-UP

d. Ensure

electrical

or sharp metal
e
Failure

to observe

serious

personal

the

%llowing

warnings

result

recognized

4. Verify

goggles

when

safety

checking

2 Do not operate

practices

or servicing

compressor

unit unless
secured.

and wear

protective

ref?igerant

system

or provide

compressor

terminal

any electIic

cover

a. Make
to

and recover

cover until all electri=

all refrigerant

fiom

system

attempt

erant

to repair

system

6. Do

not

soldered

pressure.

torch

to remove

use

is under

connection

while

refrig=

remove
any

component.

System

contains oil and refrigerant
component,
wear protective
lows:

under pressure.
To remove a
goggles and proceed
as fbl-

a. Shut off electrical

to unit.

b. Relieve

remove

all refrigerant

and low-pressure

c Cut component

connecting

component

d. Carefully

unsweat

Proceed

fbllows

unit

fitting
located

f?orn

system

using

(NECK

ports.
robing

with robing

cutter

Proceed

and

charge

remaining
when

to inspect

tubing

exposed
and

stubs

when

to torch

prepare

neces-

flame.

the

unit

instructions

and INFORMATION
the fbltowing

a Inspect
lines,
b. Inspect
unit
leak.
tion.

with, unit

and handling

damages

such as broken

robing

connections

Detecting
test

oil generally

all

refrigerant

leak detector,

one low-side

fittings

tine

Be sure

fitting

that caps

are tight.

as follows

LEAKS

to tocate

and repair

a rel'rigerant

teak and to

the unit:

Locate leak and make sure that refi'igerant
and reclaimed

system pressure

has

fiom both high- and low-pressure

leak

following
whenever

accepted
the system

practices.

NOTE:

has been opened

Install

fbr repair.

a refrigerant
Leaks

all field-

that connections

robing

halide
leak

indicates

torch,

connections

using

or liquid-soap

solu-

is detected,

see

Check

for

and fhctory-wiring
are completed

connections.

Be sure

and tight.

vapor

to system

Charge

unit

charging

cylinde*

req_m'ed

compensate

section.

refi'igerant

Recover refiigerant
f?om refrigerant
system and evacuate
500 microns if' no additional
teaks are not found

ibr

and on

a refrigerant

of R-22

inspections:

fbr oil at all refrigerant

Refrigerant
c. Inspect

to, or shipped

etc.

Leak

ports,

tine, and one high=side

discharge

REFRIGERANT

3. Add a small charge
leak-test unit.

(AUTION,

wires,

electronic

Do not loosen

po_ls.

for initial

disconnected

base.

parts,

on all WARNING,

labels attached

for shipping
loose

mounted

has 2 Schrader-type

Schrade*

loose parts have

panel

and follow

3. Make

with water to

bolts.

on the suction

these

filter &ier
2. Read

spring

on d_e compressor

FOR

2. Repair
access

is in place.

hold=down

(system)

located

in
be 2

fi'om the fan

&ain trap is filled

are internally

been relieved

startup:
1. Remove

or 1/2 in. maximum

should

START-UP

fi'om unit.

sary. Oil can ignite

Each

positioned

blade

&ainage.

compressor

covering

power

and reclaim

both high-

Compressors

robes

and handling,

blade is correctly

edge of outdoor=fan

sure that air filter(s)

proper

shipping

d. Make sure that all tools and miscellaneous
been removed.

toEhing
or disturbing
anything
inside terminal
box if
re_iigerant
leak is suspected around compressor
terminals.
5. Never

Leading

c. Make sure that condensate

before

during

sure that outdoor-fan

ensure

ref?igerant

conditions

in. back fi'om inlet grille
deck.

and

not contact

fins with a fin comb.

the following

b. Make

3. Do not remove compressor
terminal
cal sources are disconnected.

straighten

fan orifice.

power

is in place

does

coil fins If damaged

carefldly

injury:

4. Relieve

could

Inspect

wiring
edges

with

R-22

refi'igerant,

or accurate

charge
for internal

scale.

sure

volume

using

and

volumetric-

Rejur to _mit rating plate

to add

extra

of filter drier.

refi'igerant

down when

control

shuts down

after

When

INMAX
FROM FAN DECK

using

SYSTEM
to "call

an auto=changeover
in heating

fbr heating"

If system

heaters),

EMERGEN(Y

and that indoor

room them_ostat,

in AUTO

mode when

(above

is equipped

(resistance
above

is satisfied

and FAN' switches

unit operates

MOTOR SHAFT

setting

blower

fan time delay expires.

room

with

HEAT

room temperature

that

control

is set

or emergency

heat

temperature).

that when thermostat

mode

both

Obsma'e

temperature

supplemental

observe

place

positions.

is placed

and temperature

that heaters

control

and indoor blower

on. Observe
that heaters shut off when
satisfied and that the indoor blower shuts

is set
come

control setting is
off after fan time

delay expires.
CHECKING
The

refl'igerant

tested,

Fig. 2B--Fan

Blade

unless

line

Adjustment

the required

procedures

given

in the Pre-Start=

section

beik_re starting

the unit.

de_ices

when operating

the unit. Do not operate

sor when

the

accessory

outdoor

CHECKING

COOLING

thermostat

position.
that

motors

switch

Observe

in heating

mode

cooling"

(below

room

swt

at given

system

line

thermocouple-

outside

the required

pressures

and

of the
suction
outdoor

or themaistor-type

and a gauge

charging

manifold

method

jot

ther=

are required

for evaluating

sinai7 dial-Ope

the unit

thermometers

this 07)e of mea,suremes_t.

to operate
befbre

required

R=22 charge.

13A=H and Fig. 30).

_¢,se merczl O' or

of 10 minutes

to the

includes

suction

(See Table

are swt adeqzeate

Allow

minimal.

is placed

in the

checking

cooling

mode

or adiusting

fbr

refrigerant

an abnom_al

adjust charge properly or correct
cause damage to the unit.

and that indoor

blower

thermostat,

place

2. !sing hoses with valve core depressors, attach tow- and
high=pressure gauge hoses to low- and high=pressure service
fittings, respectively

that

3. Start unit in Cooling
pressures stabilize.

is set

and operates

is set to "call

OPERATION

fbr proper

cooling

mode and let unit run until system

4. Measure and record the following:

for

a. Outdoor ambient-air

CONTROL

will

1. Remove caps fiom low- and high=pressure service fittings

both

Observe
control

room temperature)

conditions

Proceed as %llows:

blower
fan shut

positions.

the abnormal

as
to

temperature

indoor

temperature (°F db).

b. Indoor coil inlet-air temperature (°F wb).

contloi

operation

c Suction=tube temperatuie

SYSTEM

motor

starts

switch

in OFF

position.

switch

is placed

when FAN

(°F) at low-side service fitting.

and shuts down when FAN" switch

is placed

5. Using "Superheat (harging (harts" compare outdoor-air temperature (°F db) with the Indoor coi! air inlet temperature (_'F
wb) to determine desired system operating superheat temperature. See Table 13_H and Fig. 30.

position.

position
that

is indicated,

and FAN switch

and outdoor

control

adjustment

fhm and

room

If a substantial

is placed

temperature).

thermostat

that blower

start.

is attached

The chart

is not

the proper

d. Suction (low-side) pressure (psig).

2. Place SYSTEM
Observe

chart

panel.

superheat,

cha*ge

condition
exists somewhere
in the cooling system, such
insufficient
airflow across either coil or both coils. Failure

below room

in AUTO

temperatuie

the unit

in ON position

motors

position

switch

mode when temperatnre

(above

when

HEATING

Start and check
fbllows:

AUTO

control

is satisfied

and FAN' switches

cooling

AUTO

position

that compressor

setting

to "call fbr heating"

Observe

refl'igerant,

after fan time delay expires.

unit operates

1. Place

operation

in OFF

when FAN

outdoor

using an auto=changeover

SYSTEM

CHECKING

control

switch

starts

in COOL

Set cooling

down when control

3. When

cooling

SYSTEM

motor

compressor,

start.

shuts down

minimum

position.

Observe

R-22

OPERATION

and shuts down when FAN" switch

2. Place SYSTEM
AUTO

NOTE:

the

refrigerant
of not having

a sling psychrometer,

I:,eca_¢se th©

to prex ent

with

charge.

fbr proper

that blower

in ON position
AUTO

accurate

charge.

(unless

charged

CHARGE

When evaluating
the refiJgerant
charge, an indicated adjust=
ment to the specified
fhctory charge must always be vew-

room

Observe

"on" cycles

the

when using the superheat

the compres-

Do not rapid=cycle

between

CONTROL

the unit

charging

temperatures

mometer,

any safety

is beloxx 40°F

kit is installed).

Allo_s 5 minutes
damage.

Start and check
fbllows:
1. Place

temperature

1o_ =ambient

compressor.
compressor

Do not jumper

access

temperature

ambient
An

REFRIGERANT

is fully

the unit is suspected

conrpressor

STAR7 UP AND MAKE ADJ[ STMENTS

Complete

system

A superheat

Clearance

ADJUSTING

and fhctow-sealed,

NOTE:
C95027

AND

switch

in HEAT

Set cooling
compressor,

Observe

position

control
outdoor

that compressor

and FAN

above room
fhm and

switch

6. Using "Required Suction=Tube Temperature (F)" table, con>
pare desired superheat temperature with suction (low-side)
operating pressure (psig) to determine proper suction-robe
temperature. See Fig. 30.

temperature

indoor

and outdoor

blowei
fan shut

EQUIP
GND

SINGLE

POINT

CONNECTION

SCHEMAT I C

BOX

BRN

BRN--

BRN

THERMOSTAT

BASE

SUB

'REO-{

REBel

GRN

>OB

6 ON
}
-GRN

OFF

OEFROST

BOARD

_-----BRN--_

Co
-ORN

VlO

BLK

ViO

I
I

BLU

9J
5U L.

>TDR

BRN_

>TDR
_-[-BRN

, .....

SUPL._
m
24V

SPLICE
BOX

74V
PL]C[
]OX

ACCESSORY
m

BRN--

ELECTRIC
m
mBRN

HEAT

tR1

LEGEND
DEFROST
OFT

OPbN

CYCLE

FIELD
OPbN

/_m_
OFl,OF21111OOSbl]mgll
RVS

MARKED

LAST

WIRE

C
CAP
COMP

CONTACTOR,COMPRESSOR
CAPACITOR
COMPRESSOR
MOTOR

CTD
EQUIP
FL

COMPRESSOR
EQUIPMENT
FUSE
LINK

FU
GND

FUSE
GROUND

HR
DB

HEATER
DEFROST

RELAY
BOARD

DFT
DR
]FM

DEFROST
DEFROST
INDOOR

THERMOSTAT
RELAY
FAN MOTOR

IP
LLSV
LP5

INTERNAL
PROTECTOR
LIQUID
LINE
SOLENOID
LOW PRESSURE
SWITCH

LS
OFM
QT

LIMIT
SWITCH
OUTDOOR
FAN MOTOR
QUADRUPLE
TERMINAL

TB
TDR
TH
TRAN
RVS

TERMINAL
BLOCK
TIME DELAY
RELAY
THERMOSTAT
HEATING
TRANSFORMER
REVERS(NO
VALVE
SOLENOID

[]pbN
B_N_[_I/_I_

DEFROST
CYCLE

T=50
T=90

TERMINAL

(MARKED)

TERMINAL

(UNMARKED)

TERMINAL

CLOCK

COHPONENT

SPLICE

MAXIMUM

ARRANGEHENT

{[_

SPLICE
SPLICE

(MARKED)

FACTORY

FIELD

CONTROL

FIELD

POWER

WIRING

ACCESSORY

WIRING
WIRING

OPTIONAL

WIRING

TO INDICATE
COMMON
POTENTIAL
ONLY=
NOT TO REPRESENT
WIRING

NOTES

I
i_

EQuip
GNO
£IN_LE

POINT

I.IF ANY OF THE ORIGINAL
WIRE FURNISHED
MUST BE REPLACED,
IT MUST
BE REPLACED
WITH TYPE
BO°C WIRE OR ITS EQUIVALENT.

2, THERMOSTAT:
SUBBAgE_

CONNECTION BOX

S.SET
4.USE

TIME

DELAY

(STRIP

HEAT)

VALVE

HHO7AT171
HHB3AZ188

HEAT ANTICIPATOR
AT .5
COPPER CONDUCTORS ONLY.

FAN

SEQUENCE

FOR

024

O48

TOR
(1,3)

o
G

COMPRESSOROELAY

COMP

CTO
_
T ,T2 I
I
0 .5 SEC
01

CCESSORJ

I
T
C1

II_
I
T+5 MIN.

ENERGIZED

T+30
T+80

(030
1024

50HX50001

CAP CAP
FM
1

048)
ONLY]

ENERGIZED

BOX
C95037

Fig. 26--Wldng

Diagram-024
2i

to 042 (2081230-60-1)

Eou.._P_

SCHEMATIC

208/230

1 80

GRA

ORN
BLK

RED

(7[_}_]_(7_}

GRA_
CM BOARD
Pl
COMPONENT

LEGEND

FIELD

SPLICE

MARKED

WIRE

TERMINAL

(MARKED)

TERMINAL

(UNMARKED)

[_]

TERMINAL

BLOCK

SPLICE
SPLICE

ARRANGEMENT
(MARKED)

_AP
COMP
CTD
EQUIP
FL
FU
GND
HR
DB
DFT

CONTACTOR,
COMPRESSOR
CAPACITOR
COMPRESSOR
MOTOR
COMPRESSOR TIME DELAY
EQUIPMENT
FUSE LINK
FUSE
GROUND
HEATER RELAY
(STRIP HEAT)
DEFROST
BOARD
DEFRO5T THERMOSTAT

ICM
[FM

INTEGRAL ELECTRONIC
INDOOR FAN MOTOR

LP5
LS
OFM

LOW PRESSURE
5WITCH
LIMIT
SWITCH
OUTDOOR FAN MOTOR

RVS

REVERSING

MOTOR

NOTES
1.IF

ANY

MUST

OF
BE

THE

ORIGINAL

REPLACED,IT

WIRE
MU5T

FURNISHED

VALVE

SOLENOID

REPLACED

BOX

50HX500105
C95038

Fig. 27--Wiring

Diagram-048

to 060 (208/230o80ol with ECM indoor)
22

TRANSFORMER CONTAINS A MANUAL
RESET OVERCURRENT PROTECTOR
tT WILL NOT AUTOMATICALLY

RESET

DISCONNECT POWER AND INSTALL
LOCKOUT TAG PRIOR TO SERVICING
THIS COMPARTMENT MUST BE CLOSED
EXCEPT WHEN SERVICING
C95025

Fig. 28--Transformer
7, (ompare

actual suction-tube

robe temperature.
if actual

temperature

suction-robe

temperature

I-Ising a tolerance
is more

temperature,

temperature

is more

than

with proper

Labem

suction-

minimum
table

3° F higher

configured

remove

than proper

refrigerant

than 3° F lower

than

required

actual

NOTE:

If the

INDOOR
NOTE:

problem

AIRFLOW

8 shows

causing

to Check
AND

For cooling

Table

12,000

inaccurate

AIRFLOW

operation,

cooling

the

for Refiigerant

is a

2. ACiHP
ACiHP

section.

ADJUSTMENTS

the recommended

Bmh of rated

airflows

readings
Leaks

being

NOTE:

cooling

at various

capacity.

external

TYPE (ORN)
Default

that all supply-

and return-air

and adjusted

4. ACiHP

grilles

are opera

properly.

electrical

changing

serious

injury

power

blower

50HX

can

tag

the lead connections

CFM

ADJUST

(024

042)

are fhctory

wired

coding

BLOWER

MOTOR

on the 208/230V

Table 4_Color

motor

leads,

see Table

Coding for 2081230-v Motor Leads
Nack

needs

the speed

speed

for desired
co_lact

FOR 208i230V-ECM
To configure

of the indoor
blower

fhn motor

fbr 350 cfi'niton and

fbctory

is A(

defimlt selection.

for the 50HX

units.

- The preset

factory

defimlt

HI and LO will adjust the airflow
modes

(see

to adjust

and static
(GRY)

table

below).

airflow

to customize

The

to meet such

compensation,

- Four motor

compressors

Relief

etc.

operation

system

have

Valve

the

= This

between

Overload

compressor

when

circuit
tester,

n,ith chassis
BLOWER

interfhce

board

the following
HEAT

which

delay

operation.

See

fbllowing

internal-

valve

opens

the tow and high

when

the

side becomes

excessive,

steps fbr basic
(VIO)

the 5 Easy Select board

the airflow.

Refer to the Easy

next to the terminal.
system

NOTE:

this step can be omitted.
The airflow
selected with the AUX HEAT RANGE
instructions

configuration.

If no heater

for electric

heaters

or internal

and automatically

resets

power

to the

temperature

when the internal

drops to a safk level.

overload

through

may require

up to 60 minutes

if the internal
the electrical
the overload

overload
power

(or longer)

is suspected

of being

to the unit and check the

with an ohmmeter

or continuity

SEQI, ENCE OF OPERATION

On a call fbr cooling, 24 v is supplied to the compressor contactor
(C) and IFR simuhaneously through the Y and G terminals of"the
thmmostat, respectively. On units with a compressor time delay
relay, there is a buih-in, 5-minute (+ 45 seconds) delay between

is installed,

fbr electric heat
terminals.
Refer

intemlpts

the current

NOTE: With the FAIN"switch in the ON position, 24-v is supplied
to the IFR through the G terminal on the them_ostat. This voltage
energizes the coil of the contactor, closing the normally-open set of"
contacts which provide continuous power to the indoor (evaporator) fire motor (IFM) Moving the FAN switch back to the AUTO.
position, providing there is not a call fbr cooling, deenergizes the
IFR, opens the IFR contacts, and deenergizes the IFM. The FAN
switch in AUTO. position cycles upon a call for cooling.

paris.

unit, move

- This eve*load

either

PSC Blower Motor I,nits (024 042)

and replace

MOTOR

control

Table 2 and the installation

(IFR)

the fire

]ns_date the remoled

speed

(Fig. 29) located

RANGE

(IFM), remove

fan relay

motor

the 50HX 048-60

to the terminals

1. AUX

All

open, disconnect

speed

leg lead from the indoor

/cad to a_oid

Perfbrm

as noise

Compressor

COOLING
To change

Select

selec-

controls.

reset; therefbre,

red = _ow speed

wires

(BLK)

are provided

Controls--

This

= high speed

b_ue = medium

lead

heat is

default

below:

become

3=SPEED

with

setting

allow installer

pressure differential
excessive,

for

electric

not be altered.

TIME DELAY

1. High=Pressure
motors

is a preset

is MED. Selections

temperature

motor

= _he _YPE

factoD- default

fbr all operational

protection

of the

pins are configured

options

listing

cause

operation.

FOR 208i230V-PSC
For color

shock

Knit
by changing

three-speed

tow speed

Electrical

or death

Airflow can be changed
blower motor
Unit

to the unit and install lockout

speed

airflow.

should

individual

Disconnect

when

The preset

Refer to

select

will be supplied

factoo'

selection

options

The airflow

on air conditioners

supplied

5. ACiHP

befbre

airflow

Each

source.

setting

selection

free fi'om obstructions,

operation

airflows

SIZE (BLU) - The preset fitctory defSult selection fbr
SIZE (air conditioner
heat pump)
is set to 400

The preset

static pressures.

installed.

Be sure

mode

heating

cfi'niton. The selection
400 cfi'niton,

airflow is 350 to

%r safe heater

d'*e avaiMble

fbr a certain

the prima_

Table 9 shows Fan Only and (ooling
modes fbr ECM units
(048-060).
Refer to these tables to determine the airflow fbr the
system

required

tbr

tion is the highest

leak, refer

450 cfm for each

below

in the Heating

suction-

tube temperature
refrigerant

airflow

of +3 ° F, add refrigerant

is
to
for

Tab{e 5--Terminam

Configuration

TERMINAL
AvailaNe
Airflow

1365

(CFM)

1470

0 %::

1680

1840

": UXNEA I/
....

RANGE

J\AB

Vl°c l oo21c:o31
0o 4
BL I OO2!
OO31004

AC/HP SIZE

Y/Y2

SEC-1

LEGEND
IFO
JW

Fig. 2g--Easy

---

Indoor Fan On
Jumper Wire

Select Interface

C95024

Board for Units 048-060 with ECM Blower Motor

Table 6--CFN
MODE

Adjust

(Percent of CFN)

FAN ONLY

COOLING

HEATING

-15

-10

LOoAdjust

HI-Adjust

Table 7--ECM

Board Pin Selection

OPTION

DESCRIPTION

30oSee On/¢0oSec Off Delay
Profile (Terminal t)

Used when it is desirable to allow system coits time to heat
up or cool down prior to airflow

No Belay Option
(TerminN 2)

compressor

starts

Used for servicing or when other components
perform the delay function

30-See Off Belay
(Terminal 3)

Preset factory setting for 50HX units

45-8ec Off Belay
(Terminal 4)

Enhances system efficiency

Energizing

the contactor

open set of contacts

supplying

power

outdoor

fan motor

(OFM).

(condenser)

the normallyoopen

set of contacts

the loss of the call for cooling,
and G terminals

the contacts

ECM

Motor

Indoor
supplied

Fan

- With

to the ECM

(providing
power

through

to the IFM. ()n
is in

and IFR and

to compressoriOFM

in the ON position,
the

"G"

terminal

fan motor

provides
(IFM)

continuous

power

If the fire switch

to the indoor

is moved

back to

the AUTO position and there is not a call for heating or cooling,
24ov is removed
from the "G"
tem_inal and d_e indoor _im

fi'om both the Y

the FAN" switch

This voltage

(evaporator)

060)

the fan switch
motor

power

thermostat

and

the IFR closes

both the contactor

supplying

Units (048

the nom_allyo

Energizing

providing

deenergizing

opening both
and IFM.

closes

to both the compressor

24 v is removed

of d-le thermostat

the AI_ T(). position),

Blower

are used to

remains

energized

AUTO,

the fan cycles

fbr the delay

On a call for cooling,

contactor

terminals

of the thermostat.

normally

open

set

24ov is
on the

of the call _br cooling,

and outdoor

When

the J:im switch

the call for heating

Cooling-

compressor

timing.

with either

24 v is supplied

contacts
(condenser)

to the compressor

d_rough the "Y"

Energizing

the contactor

supplying
fan motor

24 v is removed

flora

is in

or cooling.

power

and "G"
closes

the

both

the

(OFM).

On the toss

the "Y"

and "G"

tem_inals
of thethemaostat,
deenergizing
thecompressor
and
OFMTheindoor
_nremains
energized
forthedelay
timing.
NOTE:Oncethecompressor
hasstarted
andd_en
stoppe&
it
cannot
berestarted
again
until5minutes
have
elapsed

MAINTENANCE
To ensure
possibility

continuing
high per%tanance,
of premature
equipment
failure,

must be performed
inspected

HEATING
SEQUEN(E
OFOPERATION
PSC Blower

Motor

Units

(024

NOTE

Heat Pump Heating - On a call for heat, thermostat makes circuits
R-Y and R-G. When compressor
time delay (5 +/- 2 minutes) is
completed,

a circuit

is made

to C, starting

Circuit

R-G also energizes

IFR and starts

Should

room

continue

temperature

through

second-stage

package

is used,

supplemental

electric

open, deenergizing

bulb.

is energize&

heat. When
contactor

bringing

thermostat

and relay;

The IFM may be controlled

by a time°delay

IFM operation

of sec.

_br a matter

Defrost

Mode

- Defiost

board

control,

which

includes

a field°selectable

fbr defiost

defi'ost

cycle

thermostat

(DFT)

motor

stops and a bank

perform

that will

do not

a call

Heating

time

period

Electronic

for

contacts.

heat,

circuit

(ircuit

R-G

modQ

electric

heaters

are staged,

then

contacts

W2 when

second

satisfied,

contacts

Failure

ECM Blower
Heat Pump

Motor

to %llow

Heating

Should

room

continue

supplemental

tlaermostat

a relay

electric

setting,

change

in airflow.

deenergizing

RANGE

When

contactor

The IFM has a time

bulb.

(VIO)

setting

thern_ostat

is satisfied,

motors

Mode

- Defi'ost

board

which

includes

a field°selectable

cycle

thermostat
Defrost
motor

start only when

SIZE

to Cooling

of optional

the conditioned

Heating

thermostat
heaters
contacts,

contacts,

are staged,
W2,

open_

R-W

Electronic

modQ

electric

thermostat is satisfied,
and the IFM.

or service

removing

panels

personal

combustible

temperature

tag

on the unit.
and parts. As

injury

can result

either

on, or in contact

wires

Label

may cause

all wires prior

requirements

each

month.

improper

to disconnec°

%r this equipment

are as

(lean

when

replace

coil, &ain

motor

each

pan,

and condensate

tbr cleanliness.
and wheel

heating

and

Clean

&ain

for cleanliness

cooling

at least

when necessa_.

season.

and check
(?lean

when

electrical

connections

proper

operation

each

i\_r tightness

heating

and controls

and cooling

season.

for

Service

when necessary.

between
timer

reconnecting

4. Check

5. Ensure

and

or sharp

and defiost

except

heat turns

electric

wires

metal

are not in contact

with refi'igerant

robing

edges.

outdoor-fan
on to warm
Never

electric
and

energizing
the

in serious

necessary.

deenergize.

period

is energized

are

the heater

second

contacts

heaters

R-G

then the thermostat

when

result

etc.

season

blower

lubrication

space.

- If accessory
circuits

AIR FILTER

is identical

a call fbr heat,

DAMAGE

could

equipment,

filter(s)

indoor

3. Inspect

the fan on fbr 30-sec.

time

when

each cooling

operate

return-air
Auxiliary

edges,

air

2. Inspect

is closed.

stops and a bank

air supplying

contacts

is a time and

contactor

will be

may be a noticeable

(30, 50 or 90 minutes).

(DFT)
mode

(DB)

(CFM)

and heaters

that keeps

control,
defi'ost

FAILURE
IN SERI°

necessary.

heat

or the ACiHP

This

and relay;

to the unit and install lockout

when

maintenance

1. Inspect

R=W is made
electric

made

The minimum
follows:

delay.

on first bank

is greater.

delay relay

Manual.
RESULT

any maintenance

and dangerous
operation.
tion when servicing.

circuits

l°sec,

If optional
bringing

Defrost

fbr defiost

IFM after

to fhll, circuit

is energized,

whichever

checks

makes

heat. At this time, the airflow

either the AUX HEAT
(BLU)

Errors

IFR and starts

is used,

set

thmxuostat

warnings

power

3. Never place anything
with, the unit.

If the

060)

R-G also energizes

second-stage

and

attempt

other than those

AND POSSIBLE

these

caution

from sharp

compressor
time delay (5 +/- 2 minutes) is
is made to C, starting
(OMP
and OFM.

temperature

tools,

do not

the heater relay and the IFR.

Circuit

through

thermostat
IFR.

a second

When

- On a call for heat, thermostat

R-Y and R-G. When
completed,
a circuit

package

the
the

closes

is required.

(048

these,

injuIT:

be_bre perfbrming

on to warm

are installed,

energizes

the thermostat

Units

on this equip°
skills,

on this equipment

INJURY

1. Turn off electrical

outdoor-fan

heat turns

through

which

open, deenergizing

maintenance
mechanical

and

and defi'ost

except

heaters

is made

stage

dealer

EQUIPMENT.

2. Use extreme

electric

R=W

local

contract.

recommended
in the User's
THIS WARNING
(OULD

OUS PERSONAL

space.

is made

your

of the

between
timer

is energized

to Cooling

- If accessory

Consult

possess

any maintenance

procedures
TO HEED

deen°

per%tin
expertise,

with any mechanical
Auxiliary

at the back

be
To

is a time and temperature

contactor

of optional

OVv%ER:

certain
If you

personal

the conditioned

to tables

of a maintenance

to properly

equipment.

is closed.

is identical

air supplying

heat

contacts

relay

ability

ment requires

THIS

(30, 50 or 90 minutes).

start only when

De_i'ost mode

(DB)

electric

and heaters

extend

The

R°W is made

is satisfied,

motors

the availability-

refer

person.

delay.

on first bank

ergize.

checks

l°sec,

If optional

of units,

unit should

service

and OFM.

IFM after

to [511, circuit

thermostat

a relay

COMP

cooling

TO EQUIPMENT

about

This cooling

at least once each year by a qualified

troubleshoot
book.

042)

on this equipment.

and to minimize
the
periodic maintenance

stage

are installed,

made

relay

closes

and IFM.
the second

is required.

open, deenergizing

through

When

the unit

duct system.

size as originally
filter sizes.

the

without

Always

installed.

a suitable

air filter

in tl_e

replace

the filter with the same

See Table

1 for recommended

If the
set of

Inspect

the

air

filter(s)

(throwaway-type)

the heater relay

each heating
clogged

and cooling

with dust

least

or clean

season

and tint.

once

each

(cteanable-type)
or whenever

month

and

at least

twice

the filter(s)

replace
during

becomes

Table 8--Dry

CoN Air Demivery (Deduct 10 percent
Horizontal and Downflow Discharge
UNt 50HX024-042

for 208v)*

230 AND 4(;0 VOLT
Motor
Speed

Unit

Low
024 & 030

Med

High
Low
03G

Med

High
Low
042

Med

High

External Static Pressure (in. wg)
0.4
0.5
0.6

0.0

0.1

0.2

0.3

Watts

280

275

265

255

250

245

240

0.8

0.9

1.0

....

Cfm

820

810

755

700

660

600

560

....

Watts

365

360

350

345

340

330

320

310

300

Cfm

1025

1010

975

940

900

850

800

720

630

Watts
Cfm

---

490
1300

480
1255

470
1200

460
1150

445
1080

430
1005

410
915

390
790

380
620

.....

Watts

520

495

474

458

445

425

Cfm

1375

1335

1290

1240

1200

1140

.....

Watts

575

560

535

510

480

460

440

425

Cfm

1520

1490

1450

1400

1380

1300

1200

1080

Watts
Cfm

....
....

650
1560

614
1500

575
1380

540
1280

510
1170

480
1060

---

Watts

490

480

470

460

450

430

410

390

Cfm

1400

1380

1340

1300

1250

1200

1140

1070

Watts

590

580

560

545

525

505

480

450

420

Cfm

1600

1560

1540

1470

1430

1360

1300

1220

1120

Watts
Cfm

.....
.....

700
1780

670
1670

640
1600

600
1480

560
1340

500
1100

* Air delivery values are based on operating voltage of 230-v dry ceil, without filter or electdc heater
static pressure available for ducting

Deduct wet coil, filter and electdc heater pressure drops to obtain

NOTES:
1 Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity
this point.
2 Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.

TaNe 9--048

LNIT

0.7

& 060 ECM Airflow

Indoor coil frosting may occur at airflows below

(CFM)

UNiT 50NX

FAN ONLY
(CFM)

048

1400

1600

060

1750

2000

TOP REMOVAL

COOLING
(CFM)

Lubricate the motor eve W 5 years if the motor is used intem_ittently (thermostat FAN switch in AUTO. position), or ever),- 2
years if the motor is used continuously (thermostat FAN" switch in
ON position).

NOTE: When per%truing maintenance or smwice procedures that
require removal of the unit top, be sure to perform all of the routine
maintenance procedures that require top removal, including coi!
inspection and cleaning, and condensate &ain pan inspection and
cleaning
Only qualified stun'ice personnel should perfbm_ maintenance and
service procedures that require unit top removal. Refer to the
fk_llowing top removal procedures:

Disconnect

1, Remove 7 screws on unit top cover surface, (Save all screws,)

and

tag

cleaning

the blower

warning

could

To clean

electrical

cause personal

the blower

power

motor and wheel

motor

the

Failure

unit

be%re

to adhere to this

inju Q, or death.

and wheel:

2, Remove 4 screws on unit top cover flange (Save all screws,)
1. Remove

3, Lik top from unit caref_dly Set top on edge and make sure
that top is supported by unit side that is opposite duct (or
plenum) side.

and disassemble

a Remove
b. For

longer

life,

clean

accumulated

motor

annually.

operating
dirt

economy,

remove

securing

Do not attempt

and continuing
fiom

the blower

assembly

Disconnect

assembly

as %llows:

motor
yellow

fiom

and slide assembly
in blower

lead

from

lead

from

unit. Remove
out. Be careNt

compa_lment.

d. Ensure proper reassembly
by marking
blower wheel and
motor in relation to blower housing before disassembly.

efficiency,
wheel

blower

not to tear insulation

oilers are pretubricated

and grease

.lIotors

c. On all units

INDOOR BLOWER AND MOTOR

For

Blower

PSC

screws

Motors without
these motors

panel

indoor
fan relay (IFR).
Disconnect
terminal L2 of the contacto>

4. (arefully replace and secure unit top to unit, using screws
removed in Steps 1 and 2, when maintenance and/or service
procedures are completed.

NOTE:
lubricate

blower

unit access

e. Loosen
remove

and

setscrew(s)
that secures
screws that secure motor

ing, and slide motor

and motor

wheel to motor shaft,
mount brackets to housmount

out of housing.

TaNe 10--Wet
UNiT SBZE

0.075

900

0.088

900

0.088

1000

0.095

1200

0.123

1000

0.068

1200

0.088

1400

0.108

1800

0.123

1000

0.048

1200

0.069

1400

0.088

1800

0.102

1400

0.068

1550

0.073

1600

0.075

1800

0.088

1700

0.082

1900

0.095

2100

0.108

2300

0.123

O48

060

TuNe
600

11--Accessory

800
0.033

Table
FILTER
SiZE

UNiT SiZE

500 600 700

(_N.)
024=036

24x24x

042=060

24x30x

2. Lubricate

motor

a Thoroughly
motor

Heater

12--FiRer

Pressure

800 900 10001100

all accumulations

of dirt or grease

0.10
0.08

2000

2200

0.067

0.075

({n. wg)

0.09 0.09

0.10

0.11 0.12

0.13

0.14

0.15

2200 2300
0.17 0.18

d, Remove caked-on dirt from wheel and housing with a
brush, Remove lint and/or dirt accumulations from wheel

from

grade

from

oil ports

located

at each

motor

oil and

of SAE 20 non-detergent
(1A6

oz. or 16 to 25 drops)

in each

e Reassemble wheel and cut-off plate into housing.
£ Reassemble motor into housing. Be sure setscrews are
tightened on motor shaf_ flats and not on round part of shaft,

oil

g, Reinstall unit access panel

port.
& Allow

time for oil to be absorbed
excess

e Replace
3, Remove

1800
0.060

and housing with vacuum cleane*, using sok brush attachmont. Remove grease and oil with mild solvent

put one teaspoon

wipe

({n. wg)

1200 1300 1400 1500 1600 1700 1800 1900 20002100

0.08 0.09

housing.

a good

Drop
1600
0.052

Drop

as follows:
clean

Pressure

CFM
1400
0.047

1200
0.042

0.06 0.06 0.07 0.07

b. Remove
dust caps or plugs
end of motor.
c. Lse

Electric

1000
0.037

0.039
0.058

O42

DROP

(BN.WG)

8O0

036

0.030

PRESSURE

700

030

5=20

Drop

(CFM)
600

024

HEATER
KW

Coil Pressure

ABRFLOW

oil from motor

&st

caps or plugs

and clean

blower

proper

reassembly

a Ensure
b. Remove

screws

by each

bearing,

then

housing.
in oil ports

wheel

OUTDOOR (7OIL,
DRAIN PAN

as fbllows:

by marking

wheel

holding

cut=off

plate,

housing.

When

handling

orientation.

and remove

from

blower wheel, be sure not to disturb balance
on blower wheel vanes.

and/or
weights

INDOOR

COIL,

AND

CONDENSATE

Inspect the outdoor coil, indoor coi!, and condensate drain pan at
least once each year, See Ut*it Top Removal section.

plate

from housing.
c. Lifl wheel

Restore electrical power to unit Start unit and check fbr
proper blower rotation and motor speeds during heating and
cooling cycles

The coils are easily cleaned when du; the*efbre, inspect and dean
the coils either befbre or after each cooling season. Remove all
obstructions, including weeds and shrubs, that interfere with the
airflow through the outdoor coil.

cleaning
(clips)

TaNe 13A--Superheat

Charging

TaNe, Unit 024-311

EVAP

ABR = CFM

TEMP (F/

8OO

AIR ENT
COND

EVAP
56

240

274

70
75

195

150

AIR

Ewb

(F)

308

31.1

31.5

30.5

29.5

29.2

28.9

244

293

29.9

30.4

29.5

28.6

28.2

27.8

214

278

28.6

29.4

28.5

27.7

27.2

26.7

144

21 4

24.5

27.6

27.1

26.5

26.1

25.6

150

20.4

25.8

25.6

25.4

24.9

24.5

14.0

20.4

22.3

24.2

23.8

23.4

15.0

19.0

23.1

22.7

22.3

13.5

19.5

20.3

21.1

16.0

18.0

20.0

110

12.4

15.7

18.9

115

8.9

13.3

17.8

SPH

....

.....

100

......

105

.......

Ewb-Entering Wet Bu{b
SPH-Superheat at Compressor (F)
- -Do not attempt to charge system under these conditions

as refrigerant

slugging may occur

Table 13B--Superheat

Charging

Table, Unit 024-321

EVAP AIR = CFM
TEMP (F}
AIR ENT
COND

75O
EVAP AIR - Ewb (F)
56

38.0

37.3

37.4

375

383

377

36.8

35.9

35.0

343

335

33.3

32.3

33.2

339

369

360

35.2

34.4

33.4

325

31 8

24.6

25.6

24.1

250

333

348

33.8

32.6

31.8

31 0

302

16.4

17.6

21.4

168

232

31 8

32.2

31.3

30.4

295

286

9.4

8.6

147

21 6

29.4

29.8

28.9

278

270

.....

11 6

18.9

26.4

27.3

264

255

.....

10.8

18.0

24.1

250

241

100

.......

8.0

16.3

221

226

105

........

7.2

148

201

110

.........

5.2

138

115

..........

SPH

Ewb-Entering Wet Bu{b
SPH-Superheat at Compressor (F)
- -Do not attempt to charge system under these conditions

as refrigerant

slugging may occur

TaNe 13C--Superheat

Charging

Table, Unit 030

EVAP AIR - CFM
TEMP (F)
AIR ENT
COND

1000
EVAP AIR - Ewb (F)
58

5.5

125

196

26.6

26.9

27.2

27.5

26.5

25.4

105

175

24.5

24.8

25.1

25.4

25.1

24.8

155

22.5

22.8

23.1

23.4

23.8

24.2

129

18.9

20.3

21.5

22.9

23.0

5 1

102

15.4

17.7

20.1

22.3

22.1

21.8

....

11.9

15.2

18.5

21.8

21.5

21.2

....

12.7

17.0

21.2

20.8

20.6

100

......

14.1

191

19.5

19.9

105

......

11.4

17.1

18.2

19.3

110

......

10.0

15.1

16.9

18.6

115

.......

13.0

15.5

18.0

SPH

Ewb-Entering Wet Bulb
SPH-Superheat at Compressor (F)
- -Do not attempt to charge system under these conditions

Straighten

bent fins with

a fin comb,

If coated

as refrigerant

with

clean d'_e coils with a xacuum
cleaner_ using the
attachment,
Be careful not to bend the fins, If coated
grease,

clean

the coils with

a mild

detergentoand-water

slugghsg may occur

Rinse coils with clear water, using a garden hose Be caref_/l not to
splash water on motors, insulation, wiring, or air filter(s), For best
results, spray outdoor coil fins ti'om inside to outside the unit, On

dirt or tint,
soft brush
with oil or
solution,

Tab{e 13D--Superheat

ChargBng Table, Unit 036
EVAP

TEMP (F/

AiR

= CFM

1150

AiR ENT
COND

EVAP

AIR

Ewb

(F)

286

28.6

30.4

32.1

333

343

334

32.0

30.7

29.8

289

238

23.8

25.5

27.2

295

323

320

30.9

29.7

28.6

276

190

19.1

20.6

22.2

257

304

306

29.7

28.7

27.5

263

150

15.0

15.8

16.5

21 1

265

277

27.8

26.6

253

109

10.9

166

226

248

25.9

26.9

25.6

243

7.0

8.3

126

19 1

21 5

23.4

25.3

24.4

236

145

165

20.9

23.6

23.3

229

SPH

....

100

.....

113

143

17.4

20.4

21.1

218

105

.....

105

13.9

17.2

19.0

208

110

......

11.7

16.4

18.2

199

115

.......

15.5

17.3

191

8.6

Ewb-Entering Wet Bulb
SPH-Superheat at Compressor (F)
- -Do not attempt to charge system ur_der these conditions

as refrigerant

s{ugging may occur.

TaNe 13E--Superheat

Charging

Table, Unit 042

EVAP AIR - CFM
TEMP IF)
AIR ENT
COND

1400
EVAP AIR - Ewb (F)
56

135

13.5

17.1

207

243

257

27.1

28.5

27.8

270

114

11.4

11.5

15.1

187

223

236

25.1

26.4

26.1

258

9.4

13.0

165

20 1

21 6

23.0

24.4

24.5

246

8.9

12.4

160

194

21 0

22.4

23.8

24.0

240

8.2

11.8

153

187

202

21.8

23.3

23.4

234

7.7

10.8

137

167

187

20.7

22.7

229

7.2

9.7

122

146

172

19.7

22.2

22.3

223

100

6.6

9.6

126

155

176

19.7

21.6

21.7

21 7

105

6.1

9.6

131

165

180

19.5

21.1

21 2

110

7.0

9.9

130

150

17.1

19.1

19.8

206

115

....

6.9

119

14.5

17.0

18.5

200

SPH

Ewb-Entering Wet Bulb
SPH-Superheat at Compressor (F)
- -Do not attempt to charge system ur_der these conditions

as refrigerant

s{ugging may occur.

Tab{e 13F--Superheat

Charging
EVAP

TEMP IF)
AIR ENT
COND

Table, Unit 048-301
AIR

CFM

1600
EVAP

AIR

Ewb

(F)

263

27.0

27.6

28.6

296

305

309

31.3

31.7

31.2

307

240

23.8

23.6

25.0

264

278

284

29.0

29.7

29.6

295

197

19.7

21.4

232

250

259

26.8

27.6

27.9

282

158

15.8

17.6

194

21 2

227

24.1

25.6

26.2

269

120

12.0

13.8

156

175

195

21.5

23.5

24.5

256

7.5

9.4

11 3

132

163

19.3

22.4

23.3

242

5.0

7.0

131

17.1

21.2

22.0

228

SPH

95
100

......

14.3

19.1

20.3

214

105

......

11.4

17.1

18.6

201

110

.......

13.5

15.8

180

115

.......

10.0

13.0

160

Ewb-Entering Wet Bulb
SPH-Superheat at Compressor (F)
- -Do not attempt to charge system under these conditions

as refrigerant

s{ugging may occur.

units with an outer and inner (2 row) outdoor coil, be sure to clean
between the coils. Be sure to flush all dirt and debris from the unit

%reign

base
Inspect

the drain

pan and condensate

drain

the coils. Clean the drain pan and condensate

line when

J:'rom the pan.

Flush

the pan and drain

"plumbers
snake" or similar probe de,ice. Ensure
drain port above the drain tube is also clear

inspecting

drain by removing

matter

tube with

clear water Do not splash water on the insulation,
motor, wiring,
or air filter(s).
If the drain tube is restlicted,
clear it with a

all

that the auxiliary

Table 13G--Superheat

Charging
EVAP

TEMP IF)
AIR ENT
CONE)

Table, Unit 048=311
AiR

CFM

1550
EVAP

AIR

Ewb

(F)

39.4

40.4

406

408

41.0

40.8

40.7

402

399

35.3

35.8

36.8

376

377

378

38.4

38.2

38.4

380

376

31.7

31.4

32.6

340

345

351

35.3

35.5

35.6

358

355

28.1

28.0

28.8

298

309

31 6

32.8

32.9

32.7

330

334

24.7

24.0

24.6

26 1

275

283

29.9

30.3

30.5

302

21.2

20.8

19.3

21 0

234

250

26.6

27.4

27.9

16.5

16.1

16.3

165

188

21 2

22.7

23.9

25.4

257

259

100

12.4

7.5

5.6

11 5

149

168

19.1

21.4

22.0

233

235

105

....

127

15.2

18.3

19.5

202

211

110

.....

11.2

13.7

16.7

178

185

115

.......

7.3.

10.2

118

143

SPH

Ewb=Entedng Wet Bu{b
SPH-Superheat at Compressor (F)
- -Do not attempt to charge system under these condNons

as refrigerant

307
1

280

slugging may occur

TaNe 13H--Superheat

Charging

TaNe, Unit 060

EVAP AIR - CFM
TEMP (F}
AIR ENT
COND

1800
EVAP AIR - Ewb (F)
56

21.0

228

247

265

27.8

29.1

30.4

295

286

16.5

188

21 1

235

25.2

27.0

28.8

282

276

12.0

148

176

204

22.7

24.9

27.2

269

268

10.5

127

149

17 1

19.8

22.5

25.2

254

255

9.0

106

123

139

17.0

20.0

23.1

238

245

4.5

6.5

105

14.3

18.1

21.9

227

235

11.7

16.2

20.7

21 6

225

13.6

18.6

200

214

11.1

16.6

185

204

SPH

....

100

.....

105

......

110

.......

10.0

15.5

175

194

115

.......

9.2

14.7

165

185

Ewb-Entedng Wet Bu{b
SPH-Superheat at Compressor (F)
- -Do not attempt to charge system under these condNons

as refrigerant

slugging may occur

OUTDOOR FAN

Remove
panels

the control/blower
to locate

electrical

connections

If any smoky
Keep

the outdoor

proper
unit

cooling
Damage

l. Remove

fan

operation.

plastic

2. Inspect

fi'om

Nexer

at bottom

replacing

on top of the

of outdoor

air intake

grille

and

when

fbr cracks

fun blade,

that setscrew

from

or bends

loosen

ELECTRICAL

and slide the

inspecting

access

panel.

properly

the unit,

Refkr
position

outdoor

blade

inlet

so that the leading

grille

or 1i2=im maxi=

engages

component

are noticed,

disassemble

and wiring,
at least

publication

aid

the flat area on the motor

contlols

cooling
in

occun'ed,

check

each

instrumentation.

these

checkouts.

sequence

determining

the

to ensure proper
or both operating

electrical

label when making
andor

has

the proper

replace

one complete

of operation

proper

contlol

operation
REFRIGERANT

shaft

AND WIRING

the electrical

malfunction

with

to the unit wiring

and wiring

annually.

po_ e_' to//Te m_it and i_staT1 lochoz_t

lCt_.

CIRCUIT

all refrigerant

accumulations
erant leak.

s_#'e to mrs_ Oil the electrical

the

the wire end and reassernble

controls

Refer to the heating

Inspect

CONTROLS

all

all screw connections.

and observe

NOTE:
this

access
Check

and securely.

the electrical
Start

compartment
and wiring.

Tighten

connections

or if a suspected

electrical

grille.

and check

or burned

After

cycles,

the setscrew

tightening

6. Replace

for tightness

clean all the parts, restrip

the connection

fi'o fan deck (See Fig. 25).

5. Ensure

Inspect

articles

connection,

controls

heating cycle and one complete
cooling cycle
operation. If discrepancies
are observed in either

the fan blades

edge is 2-in. back
mum

place

to ensure

grille.

3. If fire needs to be removed,
f_n off the motor shaft.
4. When

all obstructions

to unit may result.

2 screws

remove

flee

and compressor

all the electrical

annually.

robing

connections

Detecting

and the unit base for oil

oil generally

indicates

a refiig=

Required
SUPERHEAT
TEMP (F)

Suction

Tube

Temperature

SUCTION PRESSURE
87.1
70

AT SERVICE PORT (Psig)
73
78
79.2

61.5

84.2

82.4

85.7

2
4

37
39

39
4!

4!
43

43
45

45
47

47
49

49
51

51
53

53
55

NOTE: Measure suction tube temperature
mometer or thermistor-type thermometer

with accurate superheat therC95030

Fig. 30--Required

Suction

Tube Temperature
METERING

System

under

refiigerant

pressure.

bel\_re system

personal

injury

flow-control

Relieve
repair

or death.

devices,

Use

including

pressure

and

recover

or final unit disposal
all service

ports

solenoid

valves.

DEVI(E

A(UTROL

This unit uses metering

all

to avoid

and open

(F) *

all

(located

in the header

LIQUID

LINE

leak=test
halide

or if low

all refi'igerant
torch,

detected,

leaks

suspected,
section.

to Checking

INDOOR

is suspected,

using

an electronic

leak=detector,

solution.

for Refrigerant

If no refrigerant
refer

perfom_ance

robing

liquid-soap

refer to Check

cooling

are fbund

If a refl'igerant
Leaks

mesh and located
device.

checking
ea'isrs, [_e

,sz_rethat all sz/pZ_]_,-and return-air

grilles

ob.structions,

is c[ea_. When necessm?-, refer

to Indoor
system

m_d that the air filter

Airflow

(to protect

and Airflow

Adjustments

"Use the Start-[
followed.

are r>pes_as_d f_'ee fi'nm
section

metering

device)

is made of wire

in the liquid line on the inlet side of the metering

START-UP
air-flow
does not require
is suspected,
tya pro])/em

type

Use the Tl'o_lbIe._hootmg CooIm,_ _- _:atm,_ guide (see Table 13)
if problems occur with these units.

Charge

AIRFLOW

The heating an_or
cooling
unless improper perfbrmance

orifice

coils)

TROUBLESHOOTING

performance

Reli'igerant

and outdoor

section.

and low cooling

and Adjusting

leak

that are of the fixed

to the indoor

STRAINER

The liquid line strainer
If oil is detected

devices

DEVI(E

to check

the

airflow.

p checklist

CHECKLmST

to ensure proper

start=up procedures

are

-m_=====^
OUTDOOR

COIL

LCS

Check

Valves

Closed

Open

Closed

Open
LEGEND

LCS

Loss of Charge
Acutrol

Switch

Metering

Device

Check Valve (Arrow indicates

direction

of flow)

COOLING CYCLE
1. Hot gas from compressor
flows through the 4-way valve and is
directed to the heating liquid line check valve. It is then condensed and subcooled through converging circuits. Refrigerant leaves
the outdoor coil by way of the strainer and the check valve in the
cooling liquid line.
2. The refrigerant then feeds the indoor coil through the Acutrol
metering device on each circuit

Each circuit evaporates the refrigerant and the circuits are combined in the indoor coil header with some of the circuits flowing
through the check valve.
The refrigerant then flows through the 4-way valve, accumulator,
and back to the compressor
C95044

Fig. 31--Typical

Heat Pump Operation=Cooling

Mode

OUTDOOR

COIL

Check

Valves

Open

Closed

Open

Closed
LEGEND

LCS

Loss of Charge

Switch

]

Acutrol

Check Valve (Arrow indicates

Metering

Device
direction

of flow)

HEATING CYCLE
1

Hot gas from compressor
flows through the 4-way valve and is
directed to the cooling liquid line check valve tt is then condensed
and directed through subcoo]ing circuits and out to the strainer
and the check valve in the heating liquid line.
The refrigerant then feeds the outdoor coil through the Acutrol
metering device on each circuit

3. Each circuit evaporates the refrigerant and the circuits are combined in the outdoor header with some of the circuits flowing through
the check valve
4. The refrigerant then flows through the 4-way valve, accumulator,
and back to the compressor.
C95045

Fig. 32--Typical

Heat Pump Operation-Heating

Mode

Table 14--Troubleshooting
SYMPTOM

Compressor
will not start

and

outdoor

fen

REMEDY

Power Failure

Call power company

Fuse blown or circuit breaker tripped

Replace fuse or reset circuit breaker

Defective thermostat, contactor, transformer,
control relay, defrost board, or high pressure or lossof-charge/low pressure switch

Replace component

Msufficient

Determine

line voltage

will

not

start

bat

condenser

fan

Check wiring diagram

Thermostat

Lower thermostat
temperature

setting too high
in compressor

Defective run capacitor, overload, or PTC
(positive temperature coefficient) thermistor

Determine

cause and replace

Low input voltage (20 percent low)

Determine

cause and correct

Refrigerant

Recover refrigerant, evacuate system, and
recharge to capacities shown on nameplate

overcharge

or undercharge

Replace and determine cause
Determine cause and correct

Defective run/start capacitor,
relay
Defective thermostat
Faulty outdoor-fan
Damaged reversing
Restdcfion

Thermostat

Excessive

Determine

cause end replace

Replace
cause and correct

Locate restriction and remove

system

Replace filter
Decrease load or increase

for load

unit size

Reset thermostat

charge

Locate leak, repair, and recharge

Frosted coil with incorrect defrost operation

Check defrost time settings
Reset as necessary
Check defrost temperature switch
Replace as necessary

Air in system

Recover refrigerant,
and recharge

Outdoor coil dirty or restricted

Clean coil or remove restriction

Dirty air filter
Dirty indoor or outdoor coil

Replace filter
Clean coil

Refrigerant

Recover excess refrigerant

continuously

overcharged

head pressure
(Heat) Indoor air restricted

or recirculating

Indoor or outdoor air restricted
next

cause and correct

Determine

valve

Air in system

(Continued

Determine

Replace thermostat

set too low

Low refrigerant
operates

overload or start

motor or capacitor

in refrigerant

Dirty air filter
Unit undersized

Compressor

Check wiring and repair or replace
Determine cause
Replace compressor

Msufficient fine voltage
Blocked outdoor coil
normally

and rewire correct{y

setting below room

Compressor motor burned out, seized, or
internal overload open

Defective compressor

Compressor
cycles (other than
satisfying
thermostat)

cause end correct

Mcorrect or faulty wiring

Fau{ty widng or loose connecfions
circuit
Compressor
runs

Chart

CAUSE

page)

or air short-cycling

evacuate

Recover refrigerant, evacuate
and recharge
Determine cause and correct
Uetermh'_e cause and correct

system,

Table 14--Troubleshooting
Low refrigerant
Head

pressure

too

Chart (Cont'd)

CAUSE

SYMPTOM

REMEDY

charge

Check for leaks, repair and recharge
Remove restriction

low

Restriction in liquid tube
(Heat) Outdoor
Excessive

suction

pressure

(Cool) High Heat load

Check for source and eliminate

Reversing valve hung up or leaking internally

Replace valve

Refrigerant

Recover excess refrigerant

pressure

tQo

overcharged

(Cool) Dirty air filter

Replace filter

(Heat) Outdoor

coil frosted

Move timer on control board to 30 minutes
between defrost cycles

Low refrigerant

charge

Metering
Suction

Check for leaks, repair and recharge
Remove source of restriction

device or low side restricted

low

(Cool) Insufficient
(Cool) Temperature

Compressor
rune
outdoor
fan does
not

Move timer on control board to 30 minutes
between defrost cycles

coil frosted

but

IFM does not run

Increase air quantity
Check filter-replace
if necessary

coil airflow
too low in conditioned

area

Install low-ambient

NC (normally closed) contacts on defrost board
open
Blower wheel not secured to shaft

Check condition of relay on board
Replace if necessary

Insufficient

voltage at motor

Power connectors

not properly sealed

Water dripping into motor
IFM

operation

Connectors

not firmly sealed

Motor programmed

IFM-Indoor

kit

Replace

Properly tighten blower wheel to shaft
Determine cause and correct
Connectors

should snap easily; do not force

Verify proper drip loops in connector

is intermittent

IFM (048=060) rune when
it should be off

Reset thermostat

(Cool) Outdoor ambient below 40°F
Filter-drier restricted

with a delay profile

With thermostat in "off '_mode, the voltage on
G, Y1, Y2, W with respect to common, should be
1/2 of actual low voltage supply

Fan Motor

wires

Gently pull wires individually to be sure they are
crimped into the housing
Allow a few minutes for motor to shut off
If measured voltage is more that 1/2, the thermostat
is incompatible with motor. If voltage is less than
1/2, the motor has failed

START-UPCHECKLIST
(REMOVE
ANDSTOREiN JOBFILE)
L PRELIMINARY

INFORMATION

Model No .............................................................................................................................................................
Serial No ..............................................................................................................................................................
Date .....................................................................................................................................................................
Technician

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

Job/Location

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

lB. PRE-START-UP
__

Verify that all packing materials have been removed from unit

Verify that condensate connection

Check all electrical connections

Check that indoor (evaporator)

Verify that unit installation is tevel

___
IH. START-UP

is installed per installation

and terminals

instructions

for tightness

air filter is clean and in place

Check fan wheel propeller for location in housing and setscrew tightness

Supply Voltage: C-S
Compressor

Indoor (Evaporator)
TEMPERATURE

Fan Amps: _____

Outdoor (Condenser)
Return-Air

R-C

S-R

Amps: C

Air Temperature:

Temperature:

Refrigerant

psig

Suction

Cooling Supply Air:
PRESSURES
Suction Line Temp*
Refrigerant
Discharge
__

Measured
? Measured

Discharge

psig

Templ-

Verify Refrigerant charge using charging

at suction

tables

inlet to compressor

at liquid line leaving

outdoor

coil

Manufacturer

reserves

PC 101

the

right

to discontinue,

Catalog No 535-00101

change

at any

time,

specifications

Printed in U.S.A.

or designs

Form 50HX-5SI

without

notice

and

Pg 3 6

without

7-03

incurring

ob{igations,

Replaces: 50HX-4SI

Source Exif Data:

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Page Count                      : 36
Page Layout                     : SinglePage
Page Mode                       : UseNone
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Create Date                     : Fri Apr 20 15:09:24 2007
Author                          : 
Title                           : 
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CARRIER Package Units(both Units Combined) Manual L0411028

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