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HEATING

&

COOLING

50DPE014

50DP016,020

Single-Package

Cooling

Units

Installation,

Start-Up

and

Service

Instructions

CONTENTS

Page

SAFETY

CONSIDERATIONS.

!

INSTALLATION

.1-10

Step

1

—

Provide

Unit

Support.

1

•

ROOF

CURB

•

ALTERNATE

UNIT

SUPPORT

Step

2

—

Rig

and

Place

Unit.

I

•

POSITIONING

•

ROOF

MOUNT

Step

3

—

Field

Fabricate

Ductwork.6

Step

4

—

Make

Unit

Duct

Connections.6

Step

5

—

Trap

Condensate

Drain

.6

Step

6

—

Make

Electrical

Connections.7

•

FIELD

POWER

SUPPLY

•

FIELD

CONTROL

WIRING

Step

7

—

Make

Outdoor

Air

Inlet

Adjustments.7

•

MANUAL

OUTDOOR

AIR

DAMPER

•

OPTIONAL

ECONOMIZER

Step

8

—

Install

Outdoor

Air

Hood.

10

START-UP.10-13

SERVICE.14-16

SAFETY

CONSIDERATIONS

Installation

and

servicing

of

air

conditioning

equip¬

ment

can

be

hazardous

due

to

system

pressure

and

elec¬

trical

components.

Only

trained

and

qualified

service

personnel

should

install,

repair

or

service

air

conditioning

equipment.

Untrained

personnel

can

perform

basic

maintenance

functions

of

cleaning

coils

and

filters

and

replacing

filters.

All

other

operations

should

be

performed

by

trained

service

personnel.

When

working

on

air

condi¬

tioning

equipment,

observe

precautions

in

the

literature,

tags

and

labels

attached

to

the

unit

and

other

safety

pre¬

cautions

that

may

apply.

Follow

all

safety

codes.

Wear

safety

glasses

and

work

gloves.

Use

quenching

cloth

for

unbrazing

operations.

Have

fire

extinguishers

available

for

all

brazing

operations.

A

WARNING

,

Before

performing

service

or

maintenance

operations

on

unit,

turn

off

main

power

switch

to

unit.

Electrical

shock

could

cause

personal

injury.

INSTALLATION

Step

1

—

Provide

Unit

Support

ROOF

CURB

—

Assemble

and

install

accessory

roof

curb

in

accordance

with

instructions

shipped

with

this

accessory.

Accessory

roof

curb

and

information

required

to

field

fabricate

a

roof

curb

are

shown

in

Fig.

1

and

2.

Install

insulation,

cant

strips,

roofing

and

flashing

as

shown.

Ductwork

can

be

installed

to

roof

curb

before

unit

is

set

in

place.

Curb

should

be

level.

Unit

leveling

toler¬

ance

is

±

1/16

in.

per

linear

ft

in

any

direction.

This

is

necessary

to

permit

unit

drain

to

function

properly.

Refer

to

Accessory

Roof

Curb

Installation

Instructions

for

additional

information

as

required.

ALTERNATE

UNIT

SUPPORT

—

When

the

curb

cannot

be

used,

support

unit

with

sleepers

using

unit

curb

support

area.

If

sleepers

cannot

be

used,

support

long

sides

of

unit

with

a

minimum

of

3

equally

spaced

4-in.

x

4-in.

pads

on

each

side.

Step

2

—

Rig

and

Place

Unit

—

Inspect

unit

for

transportation

damage.

File

any

claim

with

transporta¬

tion

agency.

Do

not

drop

unit,

keep

upright.

Use

spreader

bars

over

unit

to

prevent

sling

or

cable

damage.

Rollers

may

be

used

to

move

unit

across

a

roof.

Level

by

using

unit

frame

as

a

reference;

leveling

tolerance

is

±

1/16

in.

per

linear

ft

in

any

direction.

See

Fig,

3

for

additional

information.

Unit

weight

is

shown

in

Table

1.

Four

lifting

holes

are

provided

in

ends

of

unit

base

rails

as

shown

in

Fig.

3.

Refer

to

rigging

instructions

on

unit.

POSITIONING

—

Provide

clearance

around

and

above

unit

for

airflow,

safety

and

service

access

(Fig.

4).

Manufacturer

reserves

the

right

to

discontinue,

or

change

at

any

time,

specifications

or

designs

without

notice

and

without

incurring

obligations.

Bookll

|4

PC111

Catalog

No

565-104

PrintedinUSA

Form

50DP-26SI

Pg

1

7-88

Replaces:

50DP-25SI

Tab

|lb|6b

NOM

lf*4"

(32)

x

(102)

TYP.

4

PLACES

ROOF

OPENINGS

Dimensions

millimeters.

Attach

all

ductwork

to

roof

curb

Field

installation

of

sidewall

insulation

is

mandatory

INSULATION

FIELD

SUPPLIED

(SEE

NOTE

3)

Fig.

1

—

Roof

Curb

Details

INDOOR

AIR

INDOOR

AIR

FAN

MOTOR

FAN

MOTOR

50DPE0I4,

50DP0I6

50DP020

(50PQ900I5I)

TRANSITION

DUCT

Fig.

2

—

Side

Supply/Return

Curb

Details

Do

not

install

unit

in

an

indoor

location.

Do

not

locate

unit

air

inlets

near

exhaust

vents

or

other

sources

of

contaminated

air.

Although

unit

is

weatherproof,

guard

against

water

from

higher

level

runoff

and

overhangs.

ROOF

MOUNT

—

Check

building

codes

for

weight

dis¬

tribution

requirements.

Unit

weight

is

shown

in

Table

1.

RIGGING

WEIGHTS*

(lb)

MODEL

COIL

FIN

MATERIAL

OUTDOOR/INDOOR

AI/AI

Cu/AI

Cu/Cu

50DPE014

1880

1960

2040

50DP016

1880

1960

2040

50DP020

2390

2520

2630

‘Includes

economizer

weight

NOTE

Rig

by

inserting

hooks

into

unit

base

rails

as

shown

Main¬

tain

a

distance

of

120

in

(3048

mm)

from

top

of

unit

to

eyehook

Use

corner

post

from

packaging

to

protect

coil

of

unit

from

damage

by

rigging

cable.

Use

bumper

boards

for

spreader

bars

CAUTION!

All

panels

must

be

in

place

when

rigging.

Fig.

3

—

Rigging

Details

2

25%

AIR

OR

ECONOMIZER

HOOD

[D>

INDOOR

AIRFLOW

OUTDOOR

AIRFLOW

f

'>

ALTERNATE

AIRFLOW

Fig.

4

—

Physical

Data

and

Dimensions

^

SPACE

REQUIRED

FOR

SERVICE

AND

AIRFLOW

3

Table

la

—

Physical

Data

—

50DPE014

UNIT

SIZE

50DPE014

OPERATING

WEIGHT

(lb)

Unit

(Outdoor

Coil/Indoor

Coil)

AI/AI

1470

Al/Cu

1550

Cu/Cu

1630

Roof

Curb

200

Economizer

110

Electric

Heat

65

Alternate

Motor

and

Drive

5

COMPRESSOR

Semi-Hermetic

—

6

Cylinders

Quantity

1

Oil

(oz)

160

REFRIGERANT

Charge

(lb)

Sys

1*,

Sys

2

20

8

REFRIGERANT

METERING

DEVICE

Capillary

Tubes

Upper

Circuit

Quantity...Length...ID/OD

(in.)

6

25

0

055/0

125

6

25

0

055/0

125

6.25.0

055/0

125

OUTDOOR

COIL

Copper

Tube,

Aluminum

or

Copper

Plate

Fins

Rows

3

Fins/in.

Aluminum

136

Copper

124

Total

Face

Area

(sq

ft)

189

OUTDOOR

AIR

FAN

Propeller

Type,

Direct

Drive

Nominal

Cfm

12,000

Quantity...Diameter

(in.)

2

..26

Motor

Hp

(1075

Rpm)

1

INDOOR

COIL

Copper

Tube,

Aluminum

or

Copper

Plate

Fins

Rows

3

Fins/in.

Aluminum

14.3

Copper

13

1

Total

Face

Area

(sq

ft)

165

INDOOR

AIR

FANf

Centrifugal,

Belt

Drive

Quantity...Size

(in.)

2

.10x10

Nominal

Cfm

5000

Rpm

Range

Std

805-1093

Opt

978-1265

Max

Allowable

Rpm

1550

Motor

Pulley

Pitch

Diameter

(in.)

Std

2

8-3.8

Opt

3

4-4.4

Fan

Pulley

Pitch

Diameter

(in.)

6.0

Belt,

Quantity...Type...Length

(in.)

1.

V.

43

Speed

Change

per

Full

Turn

Std

58

of

Moveable

Pulley

Flange

(Rpm)

Opt

57

Moveable

Pulley

Max

Full

Turns

from

Closed

Position

Factory

Setting

—

Full

Turns

Open

3

Factory

Speed

Setting

(Rpm)

Std

920

Opt

1092

Motor

Hp

(Service

Factor)

Std

2

(1

15)

Opt

3

(1

15)

HIGH-PRESSURE

SWITCH

Cutout

(psig)

428

Reset

(psig)

320

LOW-PRESSURE

SWITCH

(Liquid

Line)

Cutout

(psig)

27

Reset

(psig)

60

AIR

INLET

SCREENS

Economizer,

Number...Size

(in.)

2

20x25x1

1

20x20x1

INDOOR

AIR

FILTERS

(Type)

10%

Efficient

—

Disposable

Fiberglass

Number...Size

(in.)

2.

20x20x2

3.16x20x2

2

16x25x2

‘System

1

consists

of

upper

portion

of

outdoor

coil

and

lower

portion

of

indoor

coil

tUnits

have

adjustable

standard

and

alternate

drives

4

Table

1b

—

Physical

Data

—

50DP016,020

UNIT

SIZE

50DP016

50DP020

OPERATING

WEIGHT

(lb)

Unit

(Outdoor

Coil/Indoor

Coil)

AI/AI

Al/Cu

Cu/Cu

Roof

Curb

Economizer

Electric

Heat

1470

1550

1630

2i

1

■

1980

2110

2220

00

10

65

COMPRESSOR

Quantity

Oil

(oz)

Semi-Hermetic

1

160

:

—

6

Cylinders

2

160

ea

REFRIGERANT

Charge

(lb)

Sys

1*,

Sys

2

R-22

21.2

R-22

17.0,

17.0

REFRIGERANT

METERING

DEVICE

Upper

Circuit

Quantity...Length...ID/OD

(in.)

Lower

Circuit

Quantity...Length...ID/OD

(in.)

Capillai

6.40.

0.065/0

125

6..20.0

055/0.125

6.20

0

055/0

125

y

Tubes

13.25.0

055/0

125

13

.25

..0

055/0.125

OUTDOOR

COIL

Rows

Fins/in.

Aluminum

Copper

Total

Face

Area

(sq

ft)

Copper

Tubes,

Alumini

3

136

12.4

18.9

jm

or

Copper

Plate

Fins

4

13.6

12.4

22.2

OUTDOOR

AIR

FAN

Nominal

Cfm

Number...Diameter

(in.)

Motor

Hp

(1075

Rpm)

Propeller

Typ

12,000

2

.26

1

ie,

Direct

Drive

11,400

2.

.26

1

INDOOR

COIL

Rows

Fins/in.

Aluminum

Copper

Total

Face

Area

(sq

ft)

Copper

Tubes,

Alumini

3

143

13

1

16.5

um

or

Copper

Plate

Fins

4

14.4

13.1

17.9

INDOOR

AIR

FANf

Quantity...Size

(in.)

Nominal

Cfm

Rpm

Range

Std

Opt

Pulley

A

Pulley

B

Maximum

Allowable

Rpm

Motor

Pulley

Pitch

Diameter

(in.)

Std

Opt

Pulley

A

Pulley

B

Fan

Pulley

Pitch

Diameter

(in.)

Belt,

Quantity...Type...Length

(in.)

Speed

Change

per

Full

Turn

Std

of

Moveable

Pulley

Flange

(Rpm)

Opt

Moveable

Pulley

Max

Full

Turns

from

Closed

Position

Factory

Setting

—

Full

Turns

Open

Factory

Speed

Setting

(Rpm)

Std

Opt

Pulley

A

Pulley

B

Motor

Hp

(Service

Factor)

Std

Opt

Centrifuga

2

..10x10

6000

916-1186

1158-1428

1550

3

4-4

4

4

3-5

3

6.4

1.

.V...45

54

55

5

3.5

970

1240

3

{1

15)

il,

Belt

Drive

2

.12x12

7200

848

1060

1550

32

40

6.6

2

V..45

848

1060

5

(1

15)

HIGH-PRESSURE

SWITCH

Cutout

(psig)

Reset

(psig)

428

320

LOW-PRESSURE

SWITCH

(Liquid

Line)

Cutout

(psig)

Reset

(psig)

27

60

AIR

INLET

SCREENS

Economizer,

Number...Size

(in.)

2.

.20x25x1

1...20x20x1

INDOOR

AIR

FILTERS

(Type)

Number...Size

(in.)

10%

efficient

—

D

2

20x20x2

3.

16x20x2

2.

.16x25x2

isposable

Fiberglass

4

20x20x2

4..

16x20x2

'System

1

consists

of

upper

portion

of

outdoor

coil

and

lower

portion

of

indoor

coil,

except

for

size

020

which

is

intertwined

|016

unit

has

adjustable

standard

and

alternate

drives

The

020

unit

does

not

have

an

alternate

drive,

but

has

2

non-adjustable

pulleys

Pulley

A

is

installed

in

unit,

pulley

B

is

shipped

with

unit

5

Step

3

—

Field

Fabricate

Ductwork

—

Secure

all

ducts

to

building

structure.

Use

flexible

duct

connectors

between

unit

and

ducts

as

required.

Insulate

and

weather¬

proof

all

external

ductwork,

joints

and

roof

openings

with

flashing

and

mastic

in

accordance

with

applicable

codes.

Ducts

passing

through

an

unconditioned

space

must

be

insulated

and

covered

with

a

vapor

barrier.

A

minimum

clearance

is

not

required

on

50DPE014

and

50DP016

units.

The

50DP020

units

with

electric

heat

require

one-in.

clearance

the

first

24

in.

of

ductwork.

Outlet

grilles

must

not

lie

directly

below

unit

discharge.

Step

4

—

Make

Unit

Duct

Connections

—

Unit

is

shipped

for

through-the-bottom

duct

connections.

Ductwork

openings

are

shown

in

Fig.

1

and

4.

Duct

connections

are

shown

in

Fig.

5.

Field-fabricated

con¬

centric

ductwork

may

be

connected

as

shown

in

Fig.

6

and

7.

Attach

all

ductwork

to

roof

curb

and

roof

curb

base-

pans.

Refer

to

installation

instructions

shipped

with

accessory

roof

curb.

50DR

DPE0I2,

014

50DP0I6

INDOOR

FAN

MOTOR

NOTE

Do

not

drill

in

this

area,

damage

to

basepan

may

result

in

water

leak.

Fig.

5

—

Air

Distribution

—

Through-the-Bottom

Step

5

—

Trap

Condensate

Drain

—

See

Fig.

4

and

8

for

drain

location.

Plug

is

provided

in

drain

hole

and

must

be

removed

when

unit

is

operating.

One

3/4-in.

half

coupling

is

provided

inside

unit

evaporator

section

for

condensate

drain

connection.

An

8-1/2

in.

x

3/4-in.

diameter

and

2-in.

x

3/4-in.

diameter

pipe

nipple

coupled

to

standard

3/4-in.

diameter

elbows

provide

a

straight

path

down

through

holes

in

unit

base

rails

(see

Fig.

9).

A

trap

at

least

4

in.

deep

must

be

used

and

must

be

pro¬

tected

against

freeze-up.

NOTE:

Do

not

drill

in

this

area,

damage

to

basepan

may

result

in

water

leak

Fin

6

—

Concentric

Duct

Air

Distribution

Shaded

area

indicates

block-off

panels

NOTE.

Dimension

A,

A1

and

B,

B1

are

obtained

from

field-

supplied

ceiling

diffuser

Fig.

7

—

Concentric

Duct

Details

Fig.

8

—

Condensate

Drain

Details

6

(|")FPT

DRAIN

CONNECTION-l-.

(HALF

COUPLING)

^

r

BASE

RAIL-

LI

TO

TRAP

<J>

Fig.

9

—

Condensate

Drain

Piping

Details

Step

6

—

Make

Electrical

Connections

FIELD

POWER

SUPPLY

—

Unit

is

factory

wired

for

voltage

shown

on

nameplate.

Units

are

provided

with

terminal

block.

When

installing

units,

provide

a

disconnect

per

NEC

of

adequate

size

(Table

2).

All

field

wiring

must

comply

with

National

Electrical

Code

and

local

requirements.

Route

power

lines

through

control

box

end

panel

—

or

unit

basepan

—

(Fig.

4)

to

terminal

connections

as

shown

on

unit

wiring

diagram

and

Fig.

10.

i

l

TBl

S

I

—

[

\d)\

EQUIP

GND

Fig,

10

—

Field

Power

Wiring

Connections

Operating

voltage

to

compressor

must

be

within

voltage

range

indicated

on

unit

nameplate.

On

3-phase

units,

voltages

between

phases

must

be

balanced

within

2%

and

the

current

must

be

balanced

within

10%.

Use

the

following

formula

to

determine

the

%

voltage

imbalance.

%

Voltage

Imbalance

100

x

max

v

°ltag

e

deviation

from

average

voltage

average

voltage

Example:

Supply

voltage

is

460-3-60.

AB

=

452

volts

BC

=

464

volts

AC

=

455

volts

Average

Voltage

=

452

+

464

+

455

1371

=

457

Determine

maximum

deviation

from

average

voltage:

(AB)

457

452

=

5

volts

(BC)

464

-

457

=

7

volts

(AC)

457

-

455

=

2

volts

Maximum

deviation

is

7

volts.

Determine

%

voltage

imbalance:

7

%

Voltage

Imbalance

=

100

xyjyy

=

1.53%

This

amount

of

phase

imbalance

is

satisfactory

as

it

is

below

the

maximum

allowable

2%.

IMPORTANT:

If

the

supply

voltage

phase

im¬

balance

is

more

than

2%,

contact

your

local

electric

utility

company

immediately.

Unit

failure

as

a

result

of

operation

on

improper

line

voltage

or

excessive

phase

imbalance

constitutes

abuse

and

may

cause

damage

to

electrical

components.

Such

operation

would

invalidate

any

applicable

Carrier

warranty.

FIELD

CONTROL

WIRING

—

Install

a

Carrier-

approved

accessory

thermostat

assembly

according

to

installation

instructions

included

with

accessory.

Locate

thermostat

assembly

on

a

solid

wall

in

the

conditioned

space

to

sense

average

temperature.

Route

thermostat

cable

or

equivalent

single

leads

of

no.

18

AWG

colored

wire

from

subbase

terminals

through

conduit

in

unit

to

low-voltage

connections

as

shown

on

unit

label

wiring

diagram

and

in

Fig.

11.

NOTE:

For

wire

runs

up

to

50

ft,

use

no.

18

AWG

insu¬

lated

wire

(35

C

minimum).

For

50

to

75

ft,

use

no.

16

AWG

insulated

wire

(35

C

minimum).

For

over

75

ft,

use

no.

14

AWG

insulated

wire

(35

C

minimum).

Set

heat

anticipator

settings

as

indicated

in

Table

3.

Settings

may

be

changed

slightly

to

provide

a

greater

degree

of

comfort

for

a

particular

installation.

Refer

to

accessory

remote

control

panel

instructions

as

required.

THERMOSTAT

ASSEMBLY

REMOVABLE

JUMPER

r~°—\

gfipHS

|wj]

^

[Yi]

@

[G]

[$

L

[

X

]

is

-

ffl

-

is

-

s

irsntr

_

Enfns

—

iirDi

LOW-VOLTAGE

TERMINAL

BLOCK

IN

UNIT

CONTROL

BOX

Fig.

11

—

Field

Control

Thermostat

Wiring

Step

7

—

Make

Outdoor

Air

Inlet

Adjustments

MANUAL

OUTDOOR

AIR

DAMPER

All

units

(except

those

equipped

with

a

factory-installed

econo¬

mizer)

have

a

manual

outdoor

air

damper

to

provide

ventilation

air.

Damper

can

be

preset

to

admit

up

to

25%

outdoor

air

into

return

air

compartment.

To

adjust,

loosen

securing

screws

and

move

damper

to

desired

setting

then

retighten

screws

to

secure

damper

(Fig.

12).

OPTIONAL

ECONOMIZER

Enthalpy

Control

Setting

(location

is

shown

in

Fig.

13)

—

For

maximum

benefit

of

outside

air,

set

enthalpy

control

to

the

A

setting

(Fig.

14).

7

25%

ADJUSTABLE

AIR

DAMPER

SECURING

SCREWS

BASE

UNIT

Fig.

12

—

25%

Outdoor

Air

Section

Details

COOLING

LOCKOUT

SWITCH

ENTHALPY

CONTROL

DAMPER

MOTOR

FILTERS

ECONOMIZER

CONTROL

BOX

ECONOMIZER

DAMPER

ASSEMBLY

Fig.

14

—

Enthalpy

Control

Assembly

Mixed

Air

Thermostat

Setting

—

Set

mixed

air

thermo¬

stat

in

return

air

compartment

to

desired

temperature

of

air

delivered

to

the

conditioned

space

(not

less

than

35

F

or

condensation

in

unit

will

result).

Damper

Vent

Position

Setting

1.

Set

fan

switch

at

ON

(continuous

fan

operation)

and

close

night

switch

if

used.

2.

Set

system

selector

switch

to

OFF.

3.

Remove

cap

from

vent

adjustment

screw

on

damper

motor

terminal

box

cover.

4.

Turn

adjustment

screw

slowly

until

dampers

assume

desired

vent

position.

Do

not

manually

operate

damper

motor;

damage

to

motor

will

result.

Fig.

13

—

Enthalpy

Control

Location

(Economizer

Damper

Assembly

—

End

View)

8

Table

2

—

Electrical

Data

UNIT

MODEL

VOLTS-PH-HZ

VOLTAGE

RANGE

COMPR

OUTDOOR

FAN

MOTOR

r—

-

INDOOR

FAN

MOTOR

—

FACTORY-

INSTALLED

HEATERS

POWER

SUPPLY

Min

Max

RLA

LRA

Qty

FLA

Hp

FLA

FLA

kW

Min

Ckt

1

MOCP

Amps

(Amps)

50DPE014

208/230-3-60

187

253

49

3

191

2

20

30

20

20

20

20

30

30

3

0

30

7

5

106

7

5

75

7

5

7

5

10

6

106

10

6

10

6

_

_

74/

82

122

122/135

41/

45

74/

82

122

122/135

41/

45

26/31

42*

42/52

14/17

26/31

42*

42/52

14/17

glut

460-3-60

414

508

22

1

86

2

33

2

0

30

2

0

20

20

3

0

30

30

3

4

48

34

34

34

48

48

48

21

39

66

21

39

66

16

30

51

16

30

51

II

575-3-60

518

632

17

9

69

2

26

20

30

2

0

3.0

2

7

3

9

2

7

3.9

37

37

37

37

31

45

32

45

50

50

52

60

50DP016

208/230-3-60

187

253

61

266

2

7

7

30

10

5

74/

82

122/135

163

163/180

26/31

42/52

56*

56/69

16

217

82

225

2

i7/239

-mmm.

460-3-60

414

508

32

0

120

2

33

30

48

_

39

66

96

30

51

73

H

575-3-60

518

632

25

6

96

2

26

30

39

50

49

38

60

68

70

50DP020

208/230-3-60

187

254

49

3

(ea)

153

(ea)

2

77

5

0

16

7

74/

82

122/135

163/180

26/31

42/52

56/69

iiH

460-3-60

414

508

199

(ea)

77

(ea)

2

33

5

0

7

6

39

66

96

30

51

73

i

B

Fuse

only,

unshaded

values

indicate

fuses

or

circuit

breakers

may

be

used

Compr

FLA

Hp

Compressor

Full

Load

Amps

Horsepower

LRA

—

Locked

Rotor

Amps

MOCP

—

Maximum

Overcurrent

Protection

RLA

—

Rated

Load

Amps

*CSA-approved

heaters

are

rated

at

208

volts

only

Q

Step

8

—

Install

Outdoor

Air

Hood

—

The

out¬

door

air

hood

is

common

to

25%

air

ventilation

and

economizer.

If

economizer

is

used,

all

electrical

connec¬

tions

have

been

made

and

adjusted

at

the

factory.

Assemble

and

install

hood

in

the

field.

NOTE:

The

hood

top

cover,

upper

and

lower

filter

retainers,

hood

drain

pan

and

filter

support

bracket

are

secured

to

the

top

crate

above

the

condenser

fans.

The

screens,

hood

side

panels,

remaining

section

of

filter

support

bracket

and

all

other

hardware

are

in

a

package

located

inside

the

return-air

filter

access

panel

(Fig.

15

and

16).

OUTDOOR

AIR

HOOD

AND

MOUNTING

BRACKETS

Fig.

15

—

Outdoor

Air

Hood

Component

Location

UNIT

TOP

CRATE

Fig.

16

—

Outdoor

Air

Hood

Components

START-UP

Unit

Preparation

—

Check

that

unit

has

been

installed

in

accordance

with

installation

instructions

and

appli¬

cable

codes.

Compressor

Mounting

—

Loosen

compressor

hold¬

down

bolts

until

sidewise

movement

of

the

washer

under

each

holddown

bolt

head

can

be

obtained.

Do

not

loosen

completely

as

bolts

are

self-locking

and

will

main¬

tain

adjustment.

Internal

Wiring

—

Check

all

electrical

connections

in

unit

control

boxes;

tighten

as

required.

Refrigerant

Service

Valves

—

The

units

have

one

service

valve

on

suction

line,

one

on

discharge

line

and

one

on

liquid

line.

Be

sure

valves

are

open.

Crankcase

Heater(s)

are

energized

as

long

as

there

is

power

to

the

unit.

NOTE:

Unit

power

must

be

on

for

24

hours

prior

to

start-up.

1.

Assemble

hood

top

cover,

side

panels,

upper

filter

retainer

and

drain

pan

(Fig.

17).

2.

Secure

lower

filter

retainer

and

support

bracket

to

unit

as

shown

in

Fig.

17.

3.

Loosen

sheet

metal

screws

for

base

unit

top

cover

located

above

outdoor

air

inlet

opening.

4.

Match

notches

in

hood

top

cover

to

unit

top

cover

screws.

Insert

hood

flange

between

unit

top

cover

flange

and

unit.

Tighten

screws.

5.

Insert

outdoor

air

inlet

screens

and

spacer

in

channel

created

by

lower

filter

retainer

and

filter

support

bracket.

6.

Attach

remaining

section

of

filter

support

bracket.

Table

3

—

Heat

Anticipator

Settings

UNIT

MODEL

VOLTAGES

kW

STAGE

1

STAGE

2

14-17

40

—

208-230/3/60

26-31

40

40

50DPE014

42-52

66

40

1

16

40

—

460/3/60

30

.40

40

51

40

66

26-31

40

66

208-230/3/60

42-52

66

.40

50DP016,020

56-69

66

66

30

40

40

460/3/60

51

40

66

73

.66

66

10