Payne PH3Z Series Manuale utente

PH3Z

13

SEER

SINGLE-PACKAGED

HEAT

PUMP

SYSTEM

WITH

R-22

REFRIGERANT

SINGLE

AND

THREE

PHASE

2-5

NOMINAL

TONS

(SIZES

024-060)

Installation

Instructions

NOTE:

_

Read

the

entire

instruction

manual

before

starting

the

installation.

TABLE

OF

CONTENTS

PAGE

SAFETY

CONSIDERATIONS

...

0.00.00

eee

2

INTRODUCTION

2.00...

eee

2

RECEIVING

AND

INSTALLATION

.......0....00.00048.

2-7

Check

Equipment

..

0.0.0...

00.

eee

2

Identify

Unit

22...

ene

2

Inspect

Shipment

.....

0.0.0...

.

eee

2

Provide

Unit

Support

..

0.0.0.0...

ee

eee

2

Slab

Mount

2.0.

6c

2

Ground

Mount

©...

eee

2

Provide

Clearances

0...

0.

eee

2

Place

Unit

2...

een

ee

2

Select

and

Install

Ductwork...

0.

ee

2

Configuring

Units

for

Downflow

(Vertical)

Discharge

....

3

Connect

Condensate

Drain

©...

0.

eee

3

Install

Electrical

Connections

©...

0.0...

eee

6

High-Voltage

Connections

...

0.0.0.0...

0.

eee

6

Routing

Power

Leads

Into

Unit

...................00-

6

Connecting

Ground

Lead

to

Unit

Ground

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

6

Routing

Control

Power

Wires...

2...

0.

ee

6

Accessory

Electric

Heat

Wiring

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

00000000

6

PRE-START-UP

2000

eee

7

START-UP

2.

eee

8-17

Check

for

Refrigerant

Leaks

..........

000.000

00

vee

ee

8

Start-Up

Cooling

and

Make

Adjustments

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

8

Checking

Cooling

and

Heating

Control

Operation

.......

8

Refrigerant

Charge»...

0.0...

eee

ee

eee

8

No

Charge...

0.0...

eee

eens

8

Low

Charge

Cooling

..

0.0.0...

0.

eee

8

Heating

Mode

Charge

...

0.0.0.0...

0.

cee

eee

8

Indoor

Airflow

and

Airflow

Adjustments

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

9

Unit

Controls

2...

eee

9

High-Pressure

Relief

Valve...

0.0...

0...

eee

ee

9

Loss-of-Charge

Switch

2.0...

0.0.0.

eee

9

Compressor

Overload

2.0.0.0...

00.00

eee

ee

10

Compressor

Rotation

..

2.0...

0.

eee

10

Sequence

of

Operation

2.0...

0...

eee

10

Fan

Operation

00...

0...

eee

ee

eee

10

2

s

LLL)

s

WII

\

Ann

A05194

Fig.

1

-

Unit

PH3Z

Cooling

Operation...

2.0...

0...

eee

10,

17

Heating

Operation

..

0.0...

.

0.

eee

17

Continuous

Fan

2.2...

eee

17

Defrost...

0.

eee

eens

17

Electric

Resistance

Heating

....

0.0.0.0...

0.0

eee

17

MAINTENANCE

.

200 een

17-20

Air

Filter

2.

ee

eens

18

Unit

Top

Removal...

0...

eee

18

Indoor

Blower

and

Motor

...

2.0.0.0...

000s

18

Outdoor

Coil,

Indoor

Coil,

and

Condensate

Drain

Pan

.....

19

Outdoor

Fan

2...

eee

19

Electrical

Controls

and

Wiring

....

0.0.0.0...

00

eee

ee

19

Refrigerant

Circuit...

0...

eee

20

Indoor

Airflow

2.0.0...

ee

eee

20

Metering

Devices

..

0.0.0.0...

cee

eee

20

Liquid

Line

Strainers...

0.0.0.0...

ee

eee

20

High

Flow

Valves

..

0.0...

0.0.

cece

eee

20

TROUBLESHOOTING

.

2...

ones

20

START-UP

CHECKLIST

2.0.0.0

eee

20

SAFETY

CONSIDERATIONS

Installation

and

servicing

of

this

equipment

can

be

hazardous

due

to

mechanical

and

electrical

components.

Only

trained

and

qualified

personnel

should

install,

repair,

or

service

this

equipment.

Untrained

personnel

can

perform

basic

maintenance

functions

such

as

cleaning

and

replacing

air

filters.

All

other

operations

must

be

performed

by

trained

service

personnel.

When

working

on

this

equipment,

observe

precautions

in

the

literature,

on

tags,

and

on

labels

attached

to

or

shipped

with

the

unit

and

other

safety

precautions

that

may

apply.

Follow

ail

safety

codes.

Installation

must

be

in

compliance

with

local

and

national

building

codes.

Wear

safety

glasses,

protective

clothing,

and

work

gloves.

Have

fire

extinguisher

available.

Read

these

instructions

thoroughly

and

follow

all

warnings

or

cautions

included

in

literature

and

attached

to

the

unit.

Recognize

safety

information.

This

is

the

safety-alert

symbol

A.

When

you

see

this

symbol

on

the

unit

and

in

instructions

or

manu-

als,

be

alert

to

the

potential

for

personal

injury.

Understand

these

signal

words:

DANGER,

WARNING,

and

CAUTION.

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

per-

sonal

injury

or

death.

CAUTION

is

used

to

identify

unsafe

practic-

es

which

may

result

in

minor

personal

injury

or

product

and

prop-

erty

damage.

NOTE

is

used

to

highlight

suggestions

which

will

result

in

enhanced

installation,

reliability,

or

operation.

CUANDO:

ELECTRICAL

SHOCK

HAZARD

Failure

to

follow

this

warning

could

result

in

personal

injury

or

death.

Before

installing

or

servicing

system,

always

turn

off

main

power

to

system

and

tag.

There

may

be

more

than

one

disconnect

switch.

Turn

off

accessory

heater

power

switch

if

applicable.

CUT

HAZARD

Failure

to

follow

this

caution

may

result

in

personal

injury.

Sheet metal

parts

may

have

sharp

edges

or

burrs.

Use

care

and

wear

appropriate

clothing.

INTRODUCTION

The

PH3Z

packaged

heat

pump

is

fully

self-contained

and

designed

for

outdoor

installation

(See

Fig.

1).

Standard

units

are

shipped

in

a

horizontal-discharge

configuration

for

installation

on

a

ground-level

slab

or

directly

on

the

ground

if

local

codes

permit.

Standard

units

can

be

converted

to

downflow

(vertical)

discharge

configurations

for

rooftop

applications

with

a

field

supplied

plenum.

RECEIVING

AND

INSTALLATION

Step

1

—

Check

Equipment

IDENTIFY

UNIT

The

unit

model

number

and

serial

number

are

printed

on

the

unit

informative

plate.

Check

this

information

against

shipping

papers.

INSPECT

SHIPMENT

Inspect

for

shipping

damage

while

unit

is

still

on

shipping

pallet.

If

unit

appears

to

be

damaged

or

is

torn

loose

from

its

anchorage,

have

it

examined

by

transportation

inspectors

before

removal.

Forward

claim

papers

directly

to

transportation

company.

Manutacturer

is

not

responsible

for

any

damage

incurred

in

transit.

Check

all

items

against

shipping

list.

Immediately

notify

the

nearest

equipment

distribution

office

if

any

item

is

missing.

To

prevent

loss

or

damage,

leave

all

parts

in

original

packages

until

installation.

Step

2

—

Provide

Unit

Support

For

hurricane

tie

downs,

contact

distributor

for

details

and

PE

(Professional

Engineering)

Certificate,

if

required.

SLAB

MOUNT

Place

the

unit

on

a

solid,

level

concrete

pad

that

is

a

minimum

of

4

in.

(102

mm)

thick

with

2

in.

(51

mm)

above

grade.

The

slab

should

extend

approximately

2

in.

(51

mm)

beyond

the

casing

on

all

4

sides

of

the

unit.

Do

not

secure

the

unit

to

the

slab

except

when

required

by

local

codes.

A

6-in.

(152

mm)

wide

gravel

apron

should

be

used

around

the

flat

surface

to

prevent

airflow

blockage

by

grass

or

shrubs.

The

unit

should

be

level

within

1/4

in.

(6

mm).

This

is

necessary

for

the

unit

drain

to

function

properly.

GROUND

MOUNT

The

unit

may

be

installed

either

on

a

slab

or

placed

directly

on

the

ground

if

local

codes

permit.

Place

the

unit

on

level

ground

prepared

with

gravel

for

condensate

discharge.

Step

3

—

Provide

Clearances

The

required

minimum

service

clearances

are

shown

in

Fig.

5.

Adequate

ventilation

and

outdoor

air

must

be

provided.

The

outdoor

fan

draws

air

through

the

outdoor

coil

and

discharges

it

through

the

top fan

grille.

Be

sure

that

the

fan

discharge

does

not

recirculate

to

the

outdoor

coil.

Do

not

locate

the

unit

in

either

a

comer

or

under

an

overhead

obstruction.

The

minimum

clearance

under

a

partial

overhang

(such

as

a

normal

house

overhang)

is

48

in.

(1219

mm)

above

the

unit

top.

The

maximum

horizontal

extension

of

a

partial

overhang

must

not

exceed

48

in.

(1219

mm).

IMPORTANT:

Do

not

restrict

outdoor

airflow.

An

air

restriction

at

either

the

outdoor-air

inlet

or

the

fan

discharge

may

be

detrimental

to

compressor

life.

Do

not

place

the

unit

where

water,

ice,

or

snow

from

an

overhang

or

roof

will

damage

or

flood

the

unit.

Do

not

install

the

unit

on

carpeting

or

other

combustible

materials.

Slab-mounted

units

should

be

at

least

4

in.

(102

mm)

above

the

highest

expected

water

and

runoff

levels.

Do

not

use

unit

if

it

has

been

under

water.

Step

4

—

Place

Unit

can

be

moved

with

the

rigging

holds

provided

in

the

unit

base.

Refer

to

Table

1

for

operating

weights.

Use

extreme

caution

to

prevent

damage

when

moving

the

unit.

Unit

must

remain

in

an

upright

position

during

all

moving

operations.

The

unit

must

be

level

with

in

1/4

in.

(6

mm)

for

proper

condensate

drainage;

the

ground-level

pad

must

be

level

before

setting

the

unit

in

place.

When

a

field-fabricated

support

is

used,

be

sure

that

the

support

is

level

and

that

it

properly

supports

the

unit.

Step

5

—

Select

and

Install

Ductwork

The

design

and

installation

of

the

duct

system

must

be

in

accordance

with

the

standards

of

the

NFPA

for

installation

of

non-residence

type

air

conditioning

and

ventilating

systems,

NFPA

90A

or

residence

type,

NFPA

90B

and/or

local

codes

and

ordinances.

Select

and

size

ductwork,

supply-air

registers,

and

return

air

grilles

according

to

ASHRAE

(American

Society

of

Heating,

Refrigeration,

and

Air

Conditioning

Engineers)

recommendations.

Use

the

duct

flanges

provided

on

the

supply-

and

return-air

openings

on

the

side

of

the

unit.

See

Fig.

5

for

connection

sizes

and

locations.

The

14-in.

(356

mm)

round

duct

collars

are

shipped

inside

the

unit

attached

to

the

base

pan

in

the

indoor

blower

compartment.

They

are

field-installed

and

must

be

removed

from

the

indoor

blower

compartment

prior

to

start-up,

even

if

they

are

not

used

for

installation.

bo

When

designing

and

installing

ductwork,

consider

the

following:

4

CAUTION

UNIT

DAMAGE

HAZARD

Failure

to

follow

this

caution

may

result

in

damage

to

unit

components.

When

connecting

ductwork

to

units,

do

not

drill

deeper

than

3/4

in.

(19

mm)

in

shaded

area

shown

in

Fig.

2

or

coil

may

be

damaged.

<@—

19.17

in.

(487

mm)

——P

13.92

in.|

¢q@——__.

(100

mm}

ce]

oC

o

oO

o

°o

oS

oO

o o

oO

OQ

°Q

°

o

°

° o

°

oO

Ao8003

Fig.

2

-

Area

Not

to

be

Drilled

More

Than

3/4-in.

(19

mm)

Deep

1.

All

units

should

have

field-supplied

filters

or

accessory

filter

rack installed

in

the

return-air

side

of

the

unit.

Recommended

sizes

for

filters are

shown

in

Table

1.

2.

Avoid

abrupt

duct

size

increases

and

reductions.

Abrupt

change

in

duct

size

adversely

affects

air

performance.

IMPORTANT:

Use

flexible

connectors

between

ductwork

and

unit

to

prevent

transmission

of

vibration.

Use

suitable

gaskets

to

ensure

weather

tight

and

airtight

seal.

When

electric

heat

is

installed,

use

fireproof

canvas

(or

similar

heat

resistant

material)

connector

between

ductwork

and

unit

discharge

connection.

If

flexible

duct

is

used,

insert

a

sheet

metal

sleeve

inside

duct.

Heat

resistant

duct

connector

(or

sheet

metal

sleeve)

must

extend

24-in.

(610

mm)

from

electric

heater

element.

3.

Size

ductwork

for

cooling

air

quantity

(cfm).

The

minimum

air

quantity

for

proper

electric

heater

operation

is

listed

in

Table

2.

Heater

limit

switches

may

trip

at

air

quantities

below

those

recommended.

4.

Seal,

insulate,

and

weatherproof

all

external

ductwork.

Seal,

insulate

and

cover

with

a

vapor

barrier

all

ductwork

passing

through

conditioned

spaces.

Follow

latest

Sheet

Metal

and

Air

Conditioning

Contractors

National

Association

(SMACNA)

and

Air

Conditioning

Contractors

Association

(ACCA)

minimum

installation

standards

for

residential

heating

and

air

conditioning

systems.

5.

Secure

all

ducts

to

building

structure.

Flash,

weatherproof,

and

vibration-isolate

duct

openings

in

wall

or

roof

according

to

good

construction

practices.

Fig.

6

shows

a

typical

duct

system

with

PH3Z

unit

installed.

CONFIGURING

UNITS

FOR

DOWNFLOW

(VERTICAL)

DISCHARGE

CE

UA

Le:

ELECTRICAL

SHOCK

HAZARD

Failure

to

follow

this

warning

could

result

in

personal

injury

or

death.

Before

performing

service

or

maintenance

operations

on

the

system,

turn

off

main

power

to

unit

and

install

lockout

tag.

Units

are

dedicated

side

supply

products.

They

are

not

convertible

to

vertical

air

supply.

A

field-supplied

plenum

must

be

used

to

convert

to

vertical

air

discharge.

Step

6

—

Connect

Condensate

Drain

NOTE:

When

installing

condensate

drain

connection

be

sure

to

comply

with

local

codes

and

restrictions.

Unit

removes

condensate

through

a

1-3/64

in.

(27

mm)

ID

hole

(using

3/4-in.

(19

mm)

OD

piping

or

tubing)

which

is

located

at

the

end

of

the

unit.

See

Fig.

5

for

location

of

condensate

connection.

Condensate

water

can

be

drained

directly

onto

the

roof

in

rooftop

installations

(where

permitted)

or

onto

a

gravel

apron

in

ground

level

installations.

Install

a

field-supplied

condensate

trap

at

end

of

condensate

connection

to

ensure

proper

drainage.

Make

sure

that

the

outlet

of

the

trap

is

at

least

1

in.

(25

mm)

lower

than

the

drain

pan

condensate

connection

to

prevent

the

pan

from

overflowing

(See

Fig.

3

and

4),

When

using

a

gravel apron,

make

sure

it

slopes

away

from

the

unit.

If

the

installation

requires

draining

the

condensate

water

away

from

the

unit,

install

a

2-in.

(51

mm)

trap

using

a

3/4-in.

(19

mm)

OD

tubing

or

pipe.

(See

Fig.

3

and

4.)

Make

sure

that

the

outlet

of

the

trap

is

at

least

1

in.

(25

mm)

lower

than

the

unit

drain-pan

condensate

connection

to

prevent

the

pan

from

overflowing.

Prime

the

trap

with

water.

Connect

a

drain

tube

using

a

minimum

of

3/4-in.

(19

mm)

PVC,

3/4-in.

(19

mm)

CPVC,

or

3/4-in.

copper

pipe

(all

field

supplied).

Do

not

undersize

the

tube.

Pitch

the

drain

tube

downward

at

a

slope

of

at

least

1

in.

(25

mm)

for

every

10

ft

(3

m)

of

horizontal

run.

Be

sure

to

check

the

drain

tube

for

leaks.

Prime

trap

at

the

beginning

of

the

cooling

season.

start-up.

Allowable

glues

for

condensate

trap

connection

are:

Standard

ABS,

CPVC,

or

PVC

cement..

1”

(25

mm)

MIN.

TRAP

OUTLET

Y

2”

(51

mm)

MIN.

A08004

Fig.

3

-

Condensate

Trap

\

TT

OUTLET

4

(25

mm)

MIN.

“yo

/

!

{

—

2"

(61

mm)

MIN.

Fig.

4

-

PVC

Condensate

Trap

090-FZ0Z

Hd

‘suolsuouN

oseg

yu)

-

¢

“SIT

Siysov

art

ELECTRICAL

UNIT

WT.

UNIT

HEIGHT CENTER

OF

GRAVITY

NM/IN

u

CHARACTERTSTICS

Les.

|

KG.

A

X

i z

PH3Z024

208-230-1-60

293

|

133

[|

30.13

[765]

|

14.0

(356)

[

19.0

[483]

|

15.0

[387]

PH3Z030

208-230-1-60

324

|

147

[|

34.13

[867]

|

14.0

(356)

[

19.0

(483)

|

16.0

[406]

PH3Z036

208-230-1-60

377

fit

[

42.13

toro)

[14.0

(386)

[19.0

(483)

[|

19.8

(503)

PH3Z042

208-230-1-60

389

|

177

|

42.13

(oT)

|

14.0

(356)

|

19.0

(483)

|

21.9

(5561

PH3Z048

208-230-1-60

3ea_[

175

|

42.13

Trove)

[4.0

(3501

[19.0

(483)

[19.8

(5031

REQUIRED

CLEARANCES

TO

COMBUSTIBLE

MATL.

MILLIMETERS

CTH]

PH3Z060

208-230-1-60

433_[i97_[

42.73

trove)

|

44.0

(356)

[

79.0

(4831

[21.9

(556)

TOP

OF

UNIT......

a

ce

BOTTOM

OF

UNIT...

.

“0

SIDE

OF

UNIT WITH DUCT

OPENINGS.

||

‘0

SIDE

OF

UNIT

OPPOSITE

DUCT

OPENINGS

8

NEC.

REQUIRED

CLEARANCES,

MILLIMETERS

CIN]

pe

1295.0

——_____»

BETWEEN

UNITS,

POWER

ENTRY

SIDE...

2.2.00.

cccs.......,.

1066.8

[42.00]

(50,

98]

UNIT

AND

UNGROUNDED

SURFACES,

POWER

ENTRY

SIDE..........914.0

[36.00]

BOTTOM

OF

UNIT UNIT

AND

BLOCK

OR

CONCRETE

WALLS

AND

OTHER

GROUNDED

SURFACES,

POWER ENTRY

SIDE...................,1066.8

[42,00]

REQUIRED

CLEARANCE

FOR

SERVICING

MILLIMETERS

CINJ

RETURN

SUPPLY

TOP

OF

UNIT.

bo

eeceeeeee

914.0

[36,00]

1

SIDE

OF

UNIT

OPPOSITE

DUCT

OPENINGS.

Silos

irs

ee.

162.0

[30.00]

SIDE

OF

UNIT WITH

POWER

ENTRY.....

DTT

162.0

(30.00)

q

CEXCEPT

FOR NEC

REQUIREMENTS)

NOTE:

CLEARANCES

MUST

BE

MAINTAINED

TO

PREVENT

RECIRCULATION

OF

AIR

FROM

OUTDOOR

FAN

DISCHARGE.

A

REMOVABLE

FENCE

OR

BARRICADE

REQUIRES

NO

4

CLEARANCE,

812.9

39]

BOTTOM

OF

UNIT

BE

DIMENSIONS

IN

[1

ARE

IN

INCHES

TOP

VIEW

153.9

(29.681

COMPRESSOR,

CONTROL

BOX AND

138.3

INDOOR

COIL

ACCESS

PANEL

129.07]

—=

238.3

e——

476.7

=

19.38]

(18.77)

ee

r=

F j

| | | |

pad

DIR.

75]

|

POWER

EWTRY

BLOWER

ACCESS

,

@

PANEL

|

A

|

911.8

t-22.2

DIA.

!

|

FULL

LOUVER

| |

FULL

LOUVER

|

[35.90]

a

: .

®

C6

LOW

VOLTAGE

ENTRY

; / / ;

130.3

| | | |

[28.75]

eI

| :

me

i I

TO

1 1 ;

247.6

.

:

-

|

. 5

[9.75]

<A

.

CL

eeeeeee

Le

pe me

;

|

L

30.6

Le

—+|

4h,

358.0

a.

|

119.72]

C2

36)

Lie

eed

cs

26.8

1.0.

[1.05]

12.7

DP..501

DUCT

OPENINGS

CONDENSATE

DRAIN

LEFT

SIDE

VIEW

FRONT

VIEW

RIGHT

SIDE

VIEW

REAR

VIEW

A”

REY

SO0ZH500442

so

INDOOR

THERMOSTAT

power

ee

SOURCE

eee

DISCONNECT

(UNIT

AND.

ELECTRIC

"=

cheer

|

RUST-PROOF

BASEPAN

CONDENSATE

CONNECTION

ames

Power

Wiring

Contro!

Wiring

»»>

Condenser

Airflow

ey

Evaporator

Airflow

A08207

Fig.

6

-

Typical

Installation

Table

1

-

Physical

Data

UNIT

SIZE

024 030 036 042 048 060

NOMINAL

CAPACITY

(ton)

2

2-1/2

3

3-1/2

4 5

OPERATING

WEIGHT

(ib)

293 324 377 389 384 433

(kg)

133 147

171

176 174 196

COMPRESSOR

Scroll

Ultra

Tech

Scroll

REFRIGERANT

(R-22)

Quantity

(Ib)

7.5

10.3 10.3

11.9 11.4

13.3

(kg)

3.4

4.7 4.7

5.4 5.2

6.0

REFRIGERANT

METERING

DEVICE

AccuRater®

TXV

Orifice

ID

(in)

0.067 0.067 0.082 0.086

- -

Orifice

OD

(in.)

0.049 0.057 0.059 0.063 0.070 0.073

CONDENSER

COIL

Copper

Tubes,

Aluminum

Plate

Fins

Rows...Fins/in.

2...27 2...27 2...27 2...27 2...27 2...27

Face Area

(sq.

ft.)

qd

12.7 15.8 15.8 13.3 15.8

CONDENSER

FAN

Propeller

Nominal

Cfm

2600 2600 3200 3200 3200 3300

Diameter

(in.)

20 20 20 20 20 20

(mm)

508 508 508 508 508 508

Motor

HP

(RPM)

1/8

(825)

1/8

(825)

1/4

(4100)

1/4

(4100)

1/4

(4100)

1/2

(4100)

EVAPORATOR

COIL

Copper

Tubes,

Aluminum

Plate

Fins

Rows...Fins/in.

3...17 3...17 4,..17 4,..17 4,..17

4,..17

Face Area

(sq.

ft.)

43 49 49

6.4

49

6.4

Evaporator

blower

Direct

Drive

Nominal

Airflow

(Cfm)

800

|

4000 4200

|

4400 4600 1875

Size

(in.)

10x8

11x9

41x10

(mm)

254

x

203 279

x

229 279

x

254

Motor

HP

(RPM)

1/2

(1050)

|

1/2

(1050)

3/4

(1050)

|

3/4

(1050)

1

(1050)

|

1

(1050)

CONNECTING

DUCT

SIZES

Round

Supply

Air

(in.)

14

(mm)

356

Return

Air

(in.)

14

(mm)

356

Return-Air

Filters*

Throwaway

(in.)

24

x

24 24

x

30 30

x

30

(mm)

610

x

610 610

x

762 762

x

762

*Required

filter

sizes

shown

are

based

on

the

AAI

(Air

conditioning

&

Refrigeration

Institute)

rated airflow

at

a

velocity

of

300

ft/min

(91

m)

for

throwaway

type

or

450

ft/min

(137

m)

for

high

capacity

type.

Recommended

filters

are

1—in.

(25

mm)

thick.

Table

2

-

Minimum

Airflow

for

Safe

Electric

Heater

Operation

—

Minimum

Airflow

(CFM)

Unit

Size

5kW

|

7.5kW

|

10kW

|

15kW

|

20kW

024 500 650 750

- -

030 600

B00.

|

1050

- -

036 600

goo.

|

1050.

1150.

|

1200

042 600

goo.

|

1050.

|

1150.

|

1200

048 600

goo.

|

1050.

|

1150.

|

1200

060 600

goo.

|

1050.

|

1150.

|

1200

Step

7

—

Install

Electrical

Connections

4

WARNING

ELECTRICAL

SHOCK

HAZARD

Failure

to

follow

this

warning

could

result

in

personal

injury

or

death.

The

unit

cabinet

must

have

an

uninterrupted,

unbroken

electrical

ground

to

minimize

the

possibility

of

personal

injury

if

an

electrical

fault

should

occur.

This

ground

may

consist

of an

electrical

wire

connected

to

the

unit

ground

screw

in

the

control

compartment,

or

conduit

approved

for

electrical

ground

when

installed

in

accordance

with

NEC,

ANSI/NFPA

70

American

National

Standards

Institute/

National

Fire

Protection

Association

(latest

edition)

(in

Canada,

Canadian

Electrical

Code

CSA

C22.1)

and

local

electrical

codes.

4

CAUTION

UNIT

COMPONENT

DAMAGE

HAZARD

Failure

to

follow

this

caution

may

result

in

damage

to

the

unit

being

installed.

1.

Make

all

electrical

connections

in

accordance

with

NEC

ANSI/NFPA

70

(latest

edition)

and

local

electrical

codes

governing

such

wiring.

In

Canada,

all

electrical

connections

must

be

in

accordance

with

CSA

standard

C22.1

Canadian

Electrical

Code

Part

1

and

applicable

local

codes.

Refer

to

unit

wiring

diagram.

bo

.

Use

only

copper

conductor

for

connections

between

field-supplied

electrical

disconnect

switch

and

unit.

DO

NOT

USE

ALUMINUM

WIRE.

.

Be

sure

that

high-voltage

power

to

unit

is

within

operating

voltage

range

indicated

on

unit

rating

plate.

On

3-phase

units,

ensure

phases

are

balanced

within

2

percent.

Consult

local

power

company

for

correction

of

improper

voltage

and/or

phase

imbalance.

an

4.

Do

not

damage

internal

components

when

drilling

through

any

panel

to

mount

electrical

hardware,

conduit,

etc.

HIGH-VOLTAGE

CONNECTIONS

The

unit

must

have

a

separate

electrical

service

with

a

field-supplied,

waterproof

disconnect

switch

mounted

at,

or

within

sight

from

the

unit.

Refer

to

the

unit

rating

plate,

NEC

and

local

codes

for

maximum

fuse/circuit

breaker

size

and

minimum

circuit

amps

(ampacity)

for

wire

sizing.

The field-supplied

disconnect

may

be

mounted

on

the

unit

over

the

high-voltage

inlet

hole

when

the

standard

power

and

low-voltage

entry

points

are

used.

See

Fig.

6

and

7

for

acceptable

location.

Operation

of

unit

on

improper

line

voltage

constitutes

abuse

and

may

cause

unit

damage

that

could

affect

warranty.

ROUTING

POWER

LEADS

INTO

UNIT

Use

only

copper

wire

between

disconnect

and

unit.

The

high-voltage

leads

should

be

in

a

conduit

until

they

enter

the

unit;

conduit

termination

at

the

unit

must

be

watertight.

Run

the

high-voltage

leads

through

the

hole

on

the

control

box

side

of

the

unit

(See

Fig.

7).

When

the

leads

are

inside

the

unit,

run

leads

to

the

control

box

(See

Fig.

8).

For

single-phase

units,

connect

leads

to

the

black

and

yellow

wires

(See

Fig.

9).

CONNECTING

GROUND

LEAD

TO

UNIT

GROUND

Connect

the

ground

lead

to

the

chassis

using

the

unit

ground

in

the

control

box

(See

Fig.

8

and

9).

ROUTING

CONTROL

POWER

WIRES

(24-V)

Form

a

drip-loop

with

the

thermostat

leads

before

routing

them

into

the

unit.

Route

the

thermostat

leads

through

grommeted

hole

provided

in

unit

into

unit

control

box

(See

Fig.

7).

Connect

thermostat

leads

and

unit

power

leads

as

shown

in

Fig.

9,

10

and

11.

Route

thermostat

wires

through

grommet

providing

a

drip-loop

at

the

panel.

Connect

low-voltage

leads

to

the

thermostat

as

shown

in

Fig.

10

&

11.

The

unit

transformer

supplies

24-v

power

for

complete

system

including

accessory

electrical

heater.

Transformer

is

factory

wired

for

230-v

operation.

ACCESSORY

ELECTRIC

HEAT

WIRING

Refer

to

accessory

electric

heat

installation

instructions

for

information

on

installing

accessory

electric

heat.

Accessory

electric

heat

wiring

is

shown

in

Fig.

17

and

18.

LOW-VOLTAGE

WIRING

ENTRY

HOLE

HIGH-VOLTAGE

POWER

WIRING

ENTRY

HOLE

(grommet

hole)

A08407

Fig.

7

-

Unit

Electrical

Connection

HEATER

LOW

VOLTAGE

PLUG

A05388

Fig.

8

-

Control

Box

Wiring

UNIT

GROUND

-~Teap

[

SINGLE-PHASE

|;

___

_ |

RK

3-PHASE

CONNECTIONS

|TODISCONNECT),

=

~R_veL

TO

DISCONNECT

|PER

NEC

L

YEL~

PER

NEC

bin

nanny

-

7

Blu-

co0012

Fig.

9

-

Line

Power

Connections

©)

Lie

(<)

RED

©)

i

GRN

(2)

a

YEL

@

ORN

©

The

Thermostat

and

subbase

cf

VIO

Unit

Controi

Power

A05207

Fig.

10

-

Control

Connections

(Sizes

024-042)

Thermostat

and

subbase

Unit

Control

ower

A05208

Fig.

11

-

Control

Connections

(Sizes

048-060)

PRE-START-UP

CUANDO:

FIRE,

EXPLOSION,

ELECTRICAL

SHOCK

HAZARD

Failure

to

follow

this

warning

could

result

in

personal

injury

or

death

and/or

property

damage.

1.

Follow

recognized

safety

practices

and

wear

protective

goggles

when

checking

or

servicing

refrigerant

system.

bo

.

Relieve

and

recover

all

refrigerant

from

system

before

touching

or

disturbing

anything

inside

terminal

box

if

refrigerant

leak

is

suspected

around

compressor

terminals.

3.

Never

attempt

to

repair

soldered

connection

while

refrigerant

system

is

under

pressure.

4.

Do

not

use

torch

to

remove

any

component.

System

contains

oil

and

refrigerant

under

pressure.

5.

To

remove

a

component,

wear

protective

goggles

and

proceed

as

follows:

a.

Shut

off

electrical

power

to

unit

and

install

lockout

tag.

b.

Relieve

and

reclaim

ail

refrigerant

from

system

using

both

high-

and

low-pressure

ports.

c.

Cut

component

connecting

tubing

with

tubing

cutter

and

remove

component

from

unit.

d.

Carefully

unsweat

remaining

tubing

stubs

when

necessary.

Oil

can

ignite

when

exposed

to

flame.

Proceed

as

follows

to

inspect and

prepare

the

unit

for

initial

start-up:

1.

Remove

all

access

panels.

2.

Read

and

follow

instructions

on

all

DANGER,

WARNING,

CAUTION,

and

INFORMATION

labels

attached

to,

or

shipped

with

unit.

3.

Make

the

following

inspections:

a.

Inspect

for

shipping

and

handling

damages,

such

as

broken

lines,

loose

parts,

disconnected

wires,

etc.

b.

Inspect

for

oil

at

all

refrigerant

tubing

connections

and

on

unit

base.

Detecting

oil

generally

indicates

a

refrigerant

leak.

Leak

test

all

refrigerant

tubing

connections

using

electronic

leak

detector,

or

liquid-soap

solution.

If

a

refrigerant

leak

is

detected,

see

Check

for

Refrigerant

Leaks

section.

c.

Inspect

all

field-

and

factory-wiring

connections.

Be

sure

that

connections

are

completed

and

tight.

d.

Ensure

wires

do

not

touch

refrigerant

tubing

or

sharp

sheet

metal

edges.

e.

Inspect

coil

fins.

If

damaged

during

shipping

and

handling,

carefully

straighten

fins

with

a

fin

comb.

4.

Verity

the

following

conditions:

a.

Make

sure

that

outdoor-fan

blade

is

correctly

positioned

in

fan

orifice.

Top

edge

of

blade

should

be

3.125

in.(79

mm)

down

from

outdoor

coil

outlet

grille

(size

024-048,

See

Fig.

19)

or

hub

should

be

0.708-in.

(18

mm)

away

from

motor

end

bell

(size

060,

See

Fig.

19).

See

Outdoor

Fan

Adjustment

section.

b.

Make

sure

that

air

filter

is

in

place.

c.

Make

sure

that

condensate

drain

pan

and

trap

are

filled

with

water

to

ensure

proper

drainage.

d.

Make

sure

that

all

tools

and

miscellaneous

loose

parts

have

been

removed.

START-UP

Step

1

—

Check

for

Refrigerant

Leaks

Proceed

as

follows

to

locate

and

repair

a

refrigerant

leak

and

to

charge

the

unit:

1.

Locate

leak

and

make

sure

that

refrigerant

system

pressure

has

been

relieved

and

reclaimed

from

both

high-

and

low-pressure

ports.

2.

Repair

leak

following

accepted

practices.

NOTE:

Install

a

filter

drier

whenever

the

system

has

been

opened

for

repair.

Step

2

—

Start-Up

Cooling

and

Make

Adjust-

ments

Complete

the

required

procedures

given

in

the

Pre-Start-Up

section

before

starting

the

unit.

Do

not

jumper

any

safety

devices

when

operating

the

unit.

Do

not

operate

the

unit

in

cooling

mode

when

the

outdoor

temperature

is

below

40°F

(4.4°C)

(unless

accessory

low-ambient

kit

is

installed).

Do

not

rapid

cycle

the

compressor,

Allow

5

min.

between

“on”

cycles

to

prevent

compressor

damage.

CHECKING

COOLING

OPERATION

Start

and

check

the

unit

for

proper

cooling

control

operation

as

follows:

1.

Place

room

thermostat

SYSTEM

switch

in

OFF

position.

Observe

that

blower

motor

starts

when

FAN

switch

is

placed

in

ON

position

and

shuts

down

within

60

sec.

(for

024-042)

or

90

seconds

(for

048

and

060)

when

FAN

switch

is

placed

in

AUTO

position.

.

Place

SYSTEM

switch

in

COOL

position

and

FAN

switch

in

AUTO

position.

Set

control

below

room

temperature.

Observe

that

compressor,

outdoor

fan,

and

indoor

blower

motors

start

and

that

reversing

valve

shifts.

Observe

that

cooling

cycle

shuts

down

when

control

setting

is

satisfied.

Reversing

valve

(RV)

remains

energized.

AND

HEATING

CONTROL

bo

3.

Place

system

switch

in

HEAT

position.

Observe

that

compressor,

indoor

fan

and

outdoor

fan

energize

(Reversing

Valve

is

deenergized

in

heat

pump

heating

mode).

Set

control

above

room

temperature.

Observe

that

heating

cycle

shuts

down

when

control

setting

is

satisfied.

4.

When

using

an

automatic

changeover

room

thermostat,

place

both

SYSTEM

and

FAN

switches

in

AUTO

positions.

Observe

that

unit

operates

in

Cooling

mode

when

temperature

control

is

set

to

call

for

Cooling

(below

room

temperature),

and

unit

operates

in

Heating

mode

when

temperature

control

is

set

to

call

for

Heating

(above

room

temperature).

Step

3

—

Refrigerant

Charge

Refrigerant

Charge

—

Amount

of

refrigerant

charge

is

listed

on

unit

nameplate

and

in

Table

1.

Refer

to

Payne

Refrigerant

Service

Techniques

Manual,

Refrigerants

section.

Unit

panels

must

be

in

place

when

unit

is

operating

during

charging

procedure.

Unit

must

operate

a

minimum

of

15

minutes

before

checking

charge.

NO

CHARGE

Refer

to

Payne

Refrigerant

Service

Techniques.

Use

standard

evacuating

techniques.

After

evacuating

system,

weigh

in

the

specified

amount

of

refrigerant

(refer

to

Table

1).

LOW

CHARGE

COOLING

024-042

units:

1.

Measure

suction

line

pressure

by

attaching

a

gauge

to

the

service

port.

bo

.

Measure

the

suction

line

temperature

by

attaching

a

temperature

sensing

device

to

it.

3.

Insulate

the

temperature

sensing

device

so

that

the

outdoor

ambient

doesn’t

affect

the

reading.

4.

Locate

the

measured

suction

line

pressure

in

the

top

row

of

Table

5

and

the

measured

outdoor ambient

temperature

in

the

left

column

of

the

table.

Based

on

the

two

values,

determine

the

required

suction

line

temperature.

5. If

the

measured

suction

line

temperature

is

greater

than

the

tabulated

temperature,

add

charge

in

the

system.

048

and

060

units:

1.

Measure

discharge

line

pressure

by

attaching

a

gauge

to

the

service

port.

bo

.

Measure

the

liquid

line

temperature

by

attaching

a

temperature

sensing

device

to

it.

3.

Insulate

the

temperature

sensing

device

so

that

the

outdoor

ambient

doesn’t

affect

the

reading.

4.

Refer

to

the

required

subcooling

in

Tables

3

to

find

the

required

subcooling

based

on

the

model

size

and

the

outdoor ambient

temperature.

5.

Interpolate

if

the

outdoor

temperature

lies

in

between

the

table

values.

Extrapolate

if

the

temperature

lies

beyond

the

table

range.

6.

Find

the

pressure

value

corresponding

to

the

measured

pressure

on

the

compressor

discharge

line.

7.

Read

across

from

the

pressure

reading

to

obtain

the

Liquid

line

temperature

for

a

required

subcooling.

8.

Add

charge

if

the

measured

temperature

is

higher

than

the

liquid

line

temperature

value

in

the

table.

9,

Add

charge

using

the

service

connection

on

the

suction

line

of

the

compressor.

HEATING

MODE

CHARGE

Do

not

attempt

to

adjust

charge

by

cooling

methods

while

in

heat

pump

heating

mode.

Recover

refrigerant

and

weigh

in

according

to

unit

data

plate

refrigerant

data.

Table

3

—

Required

Subcooling

Required

Subcooling

FCC}

Required

Liquid

Line

Temperature

for

a

Specific

Subcooling

(R-22)

Outdoor Ambient

Temperature

Required

Subcooling

(°F)

Required

Subcooling

(C}

Model

Size

Pressure

75

(24)

82

(28)

85

(29)

95

(35)

105

(44)

(psig)

5

10

15 20

(kPa)

3 §

8

Z|

048

18

(10)

|

1719.4)

|

17

(9.4)

|

16

(8.9)

|

14

(7.8)

134 7

66

61

56

924

34 39

19

16

049

24

(13.3)

|

23

(42.8)

22

(12.23

22

(12.2)

20

(11.7)

141

14

69 64 59

972

26

23

21

18

060

21

(i1.7)]

21

(11.7)

|

20

(41.1)

|

19

(10.6)

|

16

(8.9)

156

80

15

10

65

1075

30

27

24

2]

163

83

18

73

68

1124

31

28

26

23

170

86

81

16

V1

1172

33 30

27

24

Vat

89 84

79

14

1220

34

31

29

26

184

91

86

81

76

1268

36

33

30

27

.

194

94

89

84

19

1307

37 34

3]

29

Charging

Procedure

(CHARGE

SYSTEM

IN

HIGH

CAPACITY)

1-

Measure

bot

line

pressure

by

attaching

a

gauge

to

the

“8

5

s

88

8

He

i 7

si

5s

2-

Measure

the

Liquid

line

temperature

by

attaching

a

temperature

sensing

device

to

it.

eet

ie

88

a4

88

ised

43

a0

3

34

3-

Insalate

the

temperature

sensing

device

se

that

the

Outdoor

.

Ambient

doesn’t

affect

the

reading.

229

106

101

96

31

1579

44

4

38

36

4-

Refer

to

the

required

Subcooling

in

the

table

to

find

the

237

108

103

98

93

1634

45

42

40

37

required

Subcooling

based

on

the

model

size

and

the

245

WW

106

101

96

1689

47

44

4]

38

Outdoor

Ambient

temperature.

253 113 108

103

98

1744

48 45

42

40

5-

Interpolate

if

the

Outdoor

temperature

lies

in

between

the

table

values.

262

116

i

106

101

1806

49

46 44

44

6-

Find

the

Pressure

Value

corresponding

to

the

measured

271

118 113

108 103

1868

54

48 44 42

Pressure

on

the

Compressor

Discharge

line.

280

121

116

111

106

1930

52 49 46

44

7-

Read

across

from

the

Pressure

reading

to

obtain

the

Liquid

289 123

118 113 108

1992

53

51

48 45

line

temperature

for

a

required

Subcooling

8-

we

Charge

if

the

measured

temperature

is

higher

than

the

298 125

120 115 110

2054

55

52

49 46

iqaid

line

temperature

value

in

the

table

&

9-

Add

Charge

using

the

service

connection

on

the

Suction

line

307

168

1¢3

118

M3

21g

36

28 90 a8

of

the

Compressor

317 130 125

120 115

2185

57 54 52

49

10-Remove

charge

if

the

measured

temperature

is

lower than

the

get 132 tel tee

a

eeo4

98 96 33

58

liquid

line

temperature

in

the

table.

337

135 130

125 120

2323

60

57

54 52

347

137

132

127

122

2392

61

58

56

53

357

139

134 129 124

246)

62

60

57

54

367 142

137

132

127

2530

64

61

58 95

DRAWING

RUMBER

REY

50ZH500375

5.0

A08406

Step

4

—

Indoor

Airflow

and

Airflow

Adjust-

ments

NOTE:

|

For

cooling

operation,

the

recommended

airflow

is

350

to

450

cfm

for

each

12,000

Btuh

of

rated

cooling

capacity.

Table

4

shows

dry

coil

air

delivery

for

horizontal

discharge

units.

Tables

6-8

show

pressure

drops.

NOTE:

Be

sure

that

all

supply-

and

return-air

grilles

are

open,

free

from

obstructions,

and

adjusted

properly.

ELECTRICAL

SHOCK

HAZARD

Failure

to

follow

this

warning

could

result

in

personal

injury

or

death.

Disconnect

electrical

power

to

the

unit

and

install

lockout

tag

before

changing

blower

speed.

Airflow

can

be

changed

by

changing

the

lead

connections

at

the

blower

motor.

To

change

motor

speeds,

reposition

wire

at

fan

motor

speed

terminals

labeled

1-2-3-4

(refer

to

Fig.

12).

Remove

the

speed

tap

connector

labeled

1

through

5

on

the

motor.

While

looking

at

the

connector

end

that

is

inserted

into

the

motor,

gently

pry

the

locking

tab

outward

and

remove

the

wire

from

the

connector.

Insert

the

wire

into

the

desired

tap

until

it

locks

into

place.

Be

sure

new

airflow

meets

the

range

noted

above

and

minimum

electric

heat

CFM,

if

equipped.

Refer

to

Table

2

and

4.

All

model

sizes

are

factory

wired

or

rated

airflow

operation.

Fig.

12

-

Motor

Speed

Selection

FOR

208/230V

BLOWER

MOTORS

The

motor

lead

speed

connections

are

as

follows:

I

WU

G&@OoOO!

SIZE

RATED

AIRFLOW

HIGH

AIRFLOW

024

Tap

1

Tap

3

030

Tap

2

Tap

4

036

Tap

1

Tap

3

042

Tap

2

Tap

4

RATED

AIRFLOW

HIGH

AIRFLOW

SIZE Low

High

Low

High

Stage Stage Stage Stage

048

Tap

1

Tap

3

Tap

2

Tap

4

060

Tap

1

Tap

3

Tap

2

Tap

4

Step

5

—

Unit

Controls

All

compressors

have

the

following

internal-protection

controls.

HIGH-PRESSURE

RELIEF

VALVE

This

valve

opens

when

the

pressure

differential

between

the

low

and

high

side

becomes

excessive.

LOSS

OF

CHARGE

SWITCH

Located

on

the

outdoor

liquid

line

is

a

low-pressure

switch

which

functions

as

a

loss-of-charge

switch.

This

switch

contains

a

Schrader

core

depressor.

This

switch

opens

at

7

psig

and

closes

at

22

psig.

No

adjustment

is

necessary.

COMPRESSOR

OVERLOAD

This

overload

interrupts

power

to

the

compressor

when

either

the

current

or

internal

temperature

become

excessive,

and

automatically

resets

when

the

internal

temperature

drops

to

a

safe

level.

This

overload

may

require

up

to

60

minutes

(or

longer)

to

reset;

therefore,

if

the

internal

overload

is

suspected

of

being

open,

disconnect

the

electrical

power

to

the

unit

and

check

the

circuit

through

the

overload

with

an

ohmmeter

or

continuity

tester.

Step

6

—

Compressor

Rotation

On

3-Phase

units

it

is

important

to

be

certain

compressor

is

rotating

in

the

proper

direction.

To

determine

whether

or

not

compressor

is

rotating

in

the

proper

direction:

1.

Connect

service

gages

to

suction

and

discharge

pressure

fittings.

2,

Energize

the

compressor.

3.

The

suction

pressure

should

drop

and

the

discharge

pressure

should

rise,

as

is

normal

on

any start-up.

If

the

suction

pressure

does

not

drop

and

the

discharge

pressure

does

not

rise

to

normal

levels:

1.

Turn

off

power

to

the

unit

and

tag

disconnect.

2.

Reverse

any

two

of

the

unit

power

leads.

3.

Turn

on

power

to

the

unit.

The

suction

and

discharge

pressure

levels

should

now

move

to

their

normal

start-up

levels.

NOTE:

When

the

compressor

is

rotating

in

the

wrong

direction,

the

unit

makes

an

elevated

level

of

noise

and

does

not

provide

cooling.

Step

7

—

Sequence

of

Operation

FAN

OPERATION

The

FAN

switch

on

the

thermostat

controls

indoor

fan

operation.

When

the

FAN

switch

is

placed

in

the

ON

position,

the

IFR

(indoor-fan

relay)

is

energized

through

the

G

terminal

on

the

thermostat.

The

normally-open

contacts

close,

which

then

provide

power

to

the

indoor

(evaporator)

fan

motor

(IFM).

The

IFM

will

run

continuously

when

the

FAN

switch

is

set

to

ON.

When

the

FAN

switch

is

set

to

AUTO,

the

thermostat

deenergizes

the

IFR

(provided

there

is

not

a

call

for

cooling).

The

contacts

open

and

the

IFM

is

deenergized.

The

IFM

will

be

energized

only

when

there

is

a

call

for

cooling,

in

heat

pump

heating

mode

or

if

the

unit

is

equipped

with

accessory

electric

heat,

the

indoor-fan

motor

will

also

run

while

the

accessory

electric

heat

is

energized.

NOTE:

Some

units

are

equipped

with

a

time-delay

relay.

On

these

units,

the

indoor

fan

remains

on

for

30

seconds

after

G

or

Y

is

deenergized.

COOLING

OPERATION

(SIZES

024-042)

With

a

call

for

cooling

(Y¥/Y2),

the

indoor

fan

energizes

immediately

whereas

the

contactor

energizes

after

a

5

minute

time

delay

(in

case

of

initial

start-up)

starting

the

compressor

and

the

outdoor

fan

motor.

When

the

cooling

demand

is

met,

Y/Y2

de-energizes,

shutting

the

compressor,

indoor

fan

and

the

outdoor

fan.

COOLING

OPERATION

(SIZES

048

AND

060)

These

units

utilize

a

2

stage

indoor

thermostat.

With

a

first

stage

call

for

cooling

(Y1),

the

indoor

fan

(low

stage)

energizes

immediately

whereas

the

contactor

energizes

after

a

5

minute

time

delay

(in

case

of an

initial

start-up)

starting

the

compressor

(low

stage)

and

the

outdoor

fan

motor.

If

the

low

stage

operation

cannot

satisfy

the

cooling

demand,

the

second

stage

cooling

(Y2)

energizes

switching

the

compressor

into

high

stage

cooling

through

energizing

an

internal

solenoid

valve

inside

the

scroll

compressor

and

switching

the

indoor

fan

into

high

stage.

When

second

stage

cooling

is

satisfied,

Y2

de-energizes

switching

the

compressor

and

the

indoor

fan

into

low

stage

cooling.

When

the

low

stage

cooling

demand

is

met,

Y1

de-energizes

shutting

the

compressor,

indoor

fan

and

the

outdoor

fan.

HEATING

OPERATION

(SIZES

024-042)

With

a

call

for

heating

(Y1),

the

indoor

fan

Gow

stage)

energizes

immediately

whereas

the

contactor

energizes

after

a

5

minute

time

delay

(in

case

of

initial

start-up)

starting

the

compressor

and

the

outdoor

fan

motor.

If

Y/Y2

cannot

satisfy

the

heating

demand,

the

auxiliary

or

backup

heat

(W2)

energizes.

In

case

of

staged

heating,

W3

is

energized

if

the

demand

is

not

met.

The

highest

airflow

selected

is

run

while

the

electric

heat

is

in

operation.

When

heating

demand

is

met,

W3,

W2

and

Y/Y2

sequentially

de-energize

shutting

the

compressor,

indoor

fan

and

the

outdoor

fan.

HEATING

OPERATION

(SIZES

048

AND

060)

With

a

first

stage

call

for

heating

(Y1),

the

indoor

fan

(low

stage)

energizes

immediately

whereas

the

contactor

energizes

after

a

5

minute

time

delay

(in

case

of

initial

start-up)

starting

the

compressor

(low

stage)

and

the

outdoor

fan

motor.

If

the

low

stage

oepration

cannot

satisfy

the

heating

demand,

the

second

stage

heating

(Y2)

energizes

switching

the

compressor

into

high

stage

heating

through

energizing

an

internal

solenoid

valve

inside

the

scroll

compressor

and

switching

the

indoor

fan

into

high

stage.

The

auxiliary

or

backup

heat

is

controlled

by

a

third

stage

(W2).

If

the

demand

is

not

met,

W3

is

energized

in

case

of

staged

heating.

When

heating

demand

is

satisfied,

W3,

W2

and

Y2

sequentially

de-energize

switching

the

compressor

and

the

indoor

fan

into

low

stage

heating.

When

the

low

stage

heating

demand

is

met,

Y1

de-energizes

shutting

the

compressor,

indoor

fan

and

the

outdoor

fan.

CONTINUOUS

FAN

With

the

continuous

Indoor

fan

option

selected

on

the

thermostat,

G

is

continuously

energized.

In

case

of

024-042

units,

the

selected

airflow

setting

is

provided.

In

case

of

048

and

060

units,

the

system

runs

low

stage

(Y1)

airflow

for

continuous

fan

operation.

DEFROST

Defrost

board

(DB)

is

a

time

and

temperature

control,

which

includes

a

field-selectable

time

period

between

checks

for

defrost

(30,

60,

90

and 120

minutes).

The

time

period

is

factory-set

at

60

minutes

and

should

only

be

adjusted

by

a

trained

service

person.

Electronic

timer

and

defrost cycle

start

only

when

contactor

is

energized

and

defrost

thermostat

(DFT)

is

closed.

Defrost

mode

is

identical

to

Cooling

mode.

The

outdoor

fan

motor

stops

because

of

“OF1”

and

“OF2”

contacts

opening

on

the

defrost

board,

a

bank

of

optional

electric

heat

turns on

to

warm

air

supplying

the

conditioned

space.

ELECTRIC

RESISTANCE

HEATING

If

accessory

electric

heaters

are

installed,

on

a

call

for

second

stage

or

emergency

heat,

the

thermostat

energizes

W

which

energizes

the

heater

relay

and

in

turn

energizes

the

electric

heaters.

The

blower

motor

is

energized,

unless

already

running

in

heat

pump

heating

mode.

If

the

heaters

are

staged,

W2

is

energized

when

the

second

stage

of

heating

is

required.

When

the

need

for

heating

is

satisfied,

the

heater

and

IFM

are

de-energized.

10

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