Trane GRAA Owner's manual

Installation

GRAA-IOM-1

Operation

Maintenance

Library

Service

Literature

roduct

Sec

ion

Air

Handling

Product

Make

Air

Model

GRAA

GRBA

GRCA

GRDA

Literature

ype

nstallation

Operation

Maintenance

Sequence

Date

January

1995

File

No.

MUA

GRAA

IOM

Supersedes

Rooftop

Gas

Heating

Cooling

and

Ventilating

Unit

Sizes

100

MBh

1200

MBh

Design

Sequence

Since

the

Trans

Company

has

policy

continuous

product

improvement,

reserves

the

right

change

specifications

and

design

without

notice.

The

installation

and

servicing

the

equipment

referred

this

booklet

should

done

qualified,

experienced

technicians.

OAmerican

Standard

Company

1995

General

Information

Literature

Chang

History

GRAA

IOM

(January

1995

)

Original

issue

manual

describes

installation

GRAA,

GRBA,

GRCA,

GRDA

Rooftop

Gas

Heating,

Cooling

and

Ventilating

Units,

for

Design.

Warnings

and

Cautions

Notice

that

WARNINGS

and

CAUTIONS

appear

appropriate

intervals

throughout

this

manual.

Warnings

alert

installer,

owner,

operator

service

personnel

potential

hazards

that

could

result

personal

injury

death.

Cautions

are provided

to alert

personnel

conditions

which

could

result

damage

the

equipment

cause

property

damage.

Receiving

Instructions

Inspect

shipment

immediately

when

received

determine

any

damage

has

occurred

the

unit

during

shipment.

After

the

unit

has

been

uncrated,

check

for

any

visible

damage

the

unit.

any

damage

found, the

consignee

should

sign

the

bill

lading

indicating

such

damage

and

immediately

file

claim

for

damage

with

the

transportation

company.

FOR

YOUR

SAFETY

you

smell

gas

Open

windows

Don

touch

electrical

switches

Extinguish

any

open

flame

Immediately

call

your gas

supplier

FOR

YOUR

SAFETY:

The

use

and

storage

gasoline

other

flammable

vapors

and

liquids

open

containers

the

vicinity

this

appliance

hazardous.

WARNING:

Improper

installation,

adjustment,

alteration,

service

maintenance

can

cause

property

damage,

injury

death.

Read

the

installation,

operating

and

maintenance

instructions

thoroughly

before

installing

servicing

this

equipment.

Warnings

Approved

for

use

California

when

equipped

with

spark

ignition

Installer

Please

Note:

This

equipment

has

been

test

fired

and

inspected

has

been

shipped

free

from

defects

from

our

factory

However

during

shipment

and

instal

ation

problems such

loose

wires,

leaks or

loose

fasteners

may

occur.

the

installer

responsibility

inspect

and

correct

any

problems

may

found

Install,

operate

and

maintain

unit

accordance

with

manufacturer's

instructions

avoid

exposure

fiP

OYED

fuel

substances

from

incomplete

combustion

which can

cause

death

serious

illness.

The

state

California

has

determined

that

these

substances

may

cause

cancer,

birth

defects,

other

reproductive

harm.

Model

Number

Description

(All

furnaces)

DIGIT

Gas

Heating

Equipment

DIGIT

Unit

Type

F =

Rooftop

uct

Furnace

oofto

eating

Special

DIGIT

Furnace

Type

ndard

ise

(

-6

eg.

)

tandard

ise

(

Deg

)

High

Temp

Rise

(60-90

Deg.

High

Tem

(60-90

)

lank

urnac e

= Blank

Furnace

Sleeve

Special

Furnace

Type

DIGIT

Development

Sequence

irs

eneratio

DIGIT

5,6

Input

Capacity

Single

Furnace

100

MBh

Input

300

MBh

Input

150

MBh

Input

350

MBh

Input

200

MBh

Input

400

MBh

Input

250

MBh

Double Furnace

500

MBh

Input

700

MBh

Input

600

MBh

Input

800

MBh

Input

Triple

Furnace

1200

MBh

Input

=Special

unit

DIGIT

Venting

Type

ravi

ting

ower

Ventin g

pecial

enting

DIGIT

Gas

Control

Option

(Intermittent

Pilot

Ignition)

Single-Stage

Two-Stage

Hydraulic

Modulating

(60-100)

Hydraulic

Modulating

(75-200)

Hydraulic

Modulating

W/Bypass

and

limit

(60-100)

Hydraulic

Modulating

W/Bypass

(75-200)

Electronic

Modulating

W/Room

T-Stat

Electronic

Modulating

W/Duct

T-Stat

Electronic

Modulating

W/Duct

T-Stat

and

Override

Room

Thermostat

Electronic

Modulating

W/External

4-20

Input

(Furnace

L =

Electronic

Modulating

W/External

4-20

Input

Electronic

Modulating

W/External

0-10

VDC

Input

(Furnace

Electronic

modulating

W/External

0-10

VDC

Input

VAV

Control

Two-Stage

VAV

Control

Three-Stage

VAV

Control

Four-Stage

S-350

Stage Modular

Electronic

Control

System

S-350

Stage Modular

Electronic

Control

System

S-350

Stage

Modular

Electronic

Control

System

S-350

Stage

Modular

Electronic

Control

System

=Special

Gas

Control

DIGIT

Heat

Exchanger

Material

= Aluminized

teel

409

ainless

teel

(

Furn

Only)

#409

Stainless

Steel

(All

Furnace

Sections)

inless

(

irst

nly)

21 St

ainless

teel

(

Sections)

tainless

teel

ackag

(

Furnace

Only)

#409

tainless

eel

acka

(

urnace

ections)

#32

tainless

teel

acka

irs

Furnace

Only)

#321

Stainless

Steel

acka

urnace

ions)

Special

Heat

Exchanger

ackage

DIGIT

Rooftop

Arrangements

(Des

gnator

Assumes

Furnace

ecti

)

uct

Furnace

lower

(

tandard)

Blower

(Standard)

Plenum

lower (Standard)

vaporative

oole

Blower

(Standard)

vaporativ

ooler/Plenum

=Blower

(High

CFM)

lower

(

igh

)/Plenum

lower

(

igh

oolin

lower

(

igh

lin

pecial

oofto

ent

DIGIT

Main

Power

Supply

115/60/1

=230/60/3

208/60/1

460/60/3

230/60/1

575/60/3

208/60/3

Special

Main

Power

Supply

DIGIT

Design

Sequence

irst

esi

DIGIT

-Design

Sequence

irst

esign

DIGIT

Fuel

Type

atural

(

ropane)

ural

with

00%

ockout

pecial

uel

type

DIGIT

Roo

fto

eati

Motor

Selection

one

(Rooftop duct

furnace)

1/2

w/contactor

3/4

w/contactor

1/2

w/contactor

1/2

w/magnetic

starter

3/4

w/magnetic

starter

w/magnetic

starter

1/2

w/magnetic

starter

w/magnetic

starter

w/magnetic

starter

w/magnetic

starter

1/2

w/magnetic

starter

w/magnetic

starter

w/magnetic

starter

Special

Motor

DIGIT

Motor

Speed

Selection

Single

Speed

ODP

800

RPM

Single

Speed

180

=Single

peed

igh

fficiency

ODP

1800

RPM

ingle

eed

igh

fficie

TEFC

1800

RPM

2S1

ODP

1800/900

RPM

2S2W

ODP

1800/1200

RPM

Special

Spee

tarter

DIGIT

17 =

Coil

Options

cooling

coil

selection

coil,

ow,

Single

ircuit

coil,

ow,

ual

ircui

coil,

ow,

ingle

Circuit

coil,

ow,

ual

ircuit

Chilled

ater

oil,

ow,

Chilled

il,

ow,

Special

coil

DIGIT

Air

Inlet

Configuration

one

(

ooftop

duct

furnace)

Outside

Air(

)

Outside

ood

etur

Air(

Outside

eturn

(

)

Outside

and

urn

Air

ood

Special

inlet

configu

DIGIT

Air

Control

& Damper

Arrangement

one

(

ooftop

duct

urnace)

side

Air

pos.

otor/

eturn

Air

pos.

tor/

ixe

rol/

in.

ixe

Control/Min

Pot/SR

ixed

ntr

Mod

Mtr

W/Mixed

Air

Control/

OA/RA

Mod

Mtr

W/Min

ot/SR

L =

Mtr

ulb/

ixe

trol/

ulb/

ixe

ontrol/

ot/S

nthalpy

trolled

conomizer/

o d

ac e

Controller

-35

Proportional

Mixed

Air

Control/SR

tr.

/External

VDC

mAAn

alog

Inpu

tern

tr.

/Exter

VDC

nalog

npu

(

Exte

rnal

npu

t )

shrae

ycle

(

os,

w/warm-u

stat/

Ashrae

ycle

(

arm-up

ixe

ir/min

pot/S

Ashrae

ycle

111(

A/RA

W/Warm-up

at/

ixed

Air/

anual

ampe

pecial

air

control

dam

ange

DIGIT

ali

rnia

ent

California

Shipment

DIGIT

Miscellaneous

Options

rifice

For

lev

bov

e 2

000

(

v a

tive

ois

ure

limin at

ors

ori

zonta

eturn

nterlock

elay

-2

oil

DPD

elay

(

urnac

Only)

etu

Fir

sta

J= Supply

Air

Firestat

anual

lower

= 4

tainle

teel

Furnace

rip

oil

ace

nsulation

mpers

logg

Filter

witch

h /L

ress

Indicat

(

lec

cab

ine

)

Manu

Res

imi

=Interl

lay

SPDT

10A

rloc

elay

DPDT

Model

Number

Description

(Air

Handling

Units)

GIT

nit

Air

Handling

nit

DIGIT

Furnace

Type

one

DIGIT

elopment

Sequence

irst

eneration

DIGIT

Unit

Size

1500

8000

400

14000

DIGIT

Vent

Type

0 =

one

DIGIT

Main

Power

Supply

115/60/1

=230/60/3

208/60/1

=460/60/3

230/60/1

575/60/3

= 208/60/3

Special

Main

Power

Supply

GIT

Gas

Control

Option

0 =

gas

con

rol

optio n

DIGIT

Gas

ConTrol

Option

(Intermittent

Pilot

Ign

tion)

(Cont

)

VAV

ontrol

Two-

age

Con

rol

hree-Stage

VAV

Control

our-Stage

-350 2

age

Modular

lectronic

Control

System

-350

Stage

odular

lectronic

ontrol

System

S-350

Stage

ular

lectronic

Control

System

S-350

Stage

odular

lectronic

Control

System

Special

Gas

ontrol

GIT

Design

Sequence

Firs

esign

DIGIT

Design

Sequence

First

Design

DIGIT

Fuel

Type

selection

DIGIT

Heat

Exchanger

aterial

selection

DIGIT

Air

Handler

Arrangements

Blower

(Standard)

Blower

(Standard)

Plenum

Blower

(Standard)

Evaporative

Cooler

Blower

(Standard)

Evaporative

Cooler/Plenum

=Blower

(High

CFM)

=Blower

(High

CFM)/Plenum

=Blower

(High

CFM)/Cooling

=Blower

(High

CFM)/Cooling/Plenum

=Special

Rooftop

Arrangment

DIGIT

Motor

Selection

1/2

w/contactor

3/4

w/contactor

1/2

w/contactor

1/2

w/magnetic

starter

3/4

w/magnetic

starter

w/magnetic

starter

1/2

w/magnetic

starter

w/magnetic

starter

w/magnetic

starter

w/magnetic

starter

1/2

w/magnetic

starter

w/magnetic

starter

w/magnetic

starter

Special

Motor

DIGIT

16 =

Motor

Speed

Starter

Selection

ingle

peed

1800

Single

Speed

800

RPM

Single

Speed

High

Efficiency

1800

ingle

peed

High

fficiency

TEF

1800

800/900

6 =

2S2W

ODP

1800/1200

Special

Motor

Speed

Starter

DIGIT

Options

ling coil

selection

coil,

ow,

Single

ircuit

coil,

ow,

ual

ircuit

coil,

ow,

Single

ircuit

coil,

ow,

ual

Circui

hilled

Water

Coil,

ow,

ingle

ircuit

hilled

Water

oil,

ow,

ual

ircuit

Special

coil

IGIT

Air

Inlet

Configuration

Outside

Air(OA)

2 =

Outside

Air

W/Air

Hood

Return

Air(RA)

4 =

Outside

And

Return

Air

(OA/RA)

Outside

and

Return

Air

W/Air

Hood

Special

Air

inlet

configuration

DIGIT

Air

Control

Damper

Arrangement

election

Outside

Air

pos.

or/S

eturn

Air

os.

otor/S

OA/

pos

OA/

Mtr.

ixed

Air

ontrol/

in.

OA/

Mod

W/Mixed

ontrol/Min

ot/

W/Mixed

Air

ontrol

OA/R

W/Mixe

Air

ontroVS

OA/

ot/

L =

A/R

o d

Mtr

W/D

ulb/

ixed

Air

ol/

OA/

ulb/

ixed

ontrol/

ot/

Mtr

nthalpy

ontrolled

conomi

er/

pace

ressure

Controller

OA/

S-350

roportional

ixed

ontrol/

OA/R

tr.

W/External

-10

VDC

and

4-20mAAnalog

ut/(External

Inpu

)

t r

xternal

0-10

VDC

2 0

Analog

Inpu

(

xternal

npu

)

Ashrae

ycle

pos.

w/warm-up

stat/

Ashrae

ycle

(OA/

o d

W/Warm-u

Stat/

ixed

Air/min

ot/

Ashrae

Cycle

III(OA/

Mod.

W/Warm-up

Stat/

ixed

Air/S

anual

ampers

Special

air

control

and

damper

arrangement

DIGIT

California

pment

on-

alifornia

Shipment

alifornia

Shipmen

DIGIT

Miscellaneous

Options

rifices

levation

bove

2000

(Specify

levation)

12"

Evaporative

edia

Mois

ure

liminators

Horizontal

eturn

Interlock

elay

-2

oil

DPDT

Freezestat

Fan

ime

elay

ontrol

(

Only)

= Return

Air

Firestat

J= Supply

Air Firestat

Manual

Blower

Switch

Feet

ace

409

Stainless

Steel

Furnace

Drip

Pan

=Foil

Face

Insulation

=Low

Leak

Dampers

=Clogged

Filter

Switch

=High/Low

Gas

Pressure

Limit

Switches

=Status

Indicator

Lamps

(Elec

cabinet)

Manual

Reset

High

Limit

Switch

=Interlock

Relay

-24/115V

Coil

SPDT

10A

Interlock

Relay

-24/115-230V

Coil

DPDT

10A

TABLE

CONTENTS

1 .

RECEIVING &

PRE

INSTALLATION

INSTRUCTIONS

Access

Panel

Removal

...:................

Rigging

........

....

................3

Combustion

Air

Considerations

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

Location

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

.......3

Mounting

Locations

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

GENERAL

REQUIREMENTS

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

III

INSTALLATION

Installation

Clearances

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

Mounting

Field

Furnished

Supports

........

Mounting

Roof

Curb

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

Venting

...............:................6

Duct

Connections.......

...........

...

Gas

Piping

...........................6

Modulating

Gas

Control

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

'Electrical

Connections

...

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

Coil

Equipped

Units

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

Chilled

Water

Coil

Equipped

Units

..........

Evaporative

Cooling

Equipped

Units

.........

OPERATION

General

Information

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

Gas

Control

System

.....

........

.....

Optional

Gas

Controls

...

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

Air

Handling

Requirements

and

djustments

Lighting

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

Gas

Input

Adjustment....

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

Pilot

Adjustment

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

Primary

Air

Shutter

Adjustment

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

Controls

..............................14

START

...........

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

MAINTENANCE

......!

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

VII

TROUBLESHOOTING

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

VII

REP

ACEMENT

PARTS

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

SERVICE

NOTE

.....

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

START

SHEET

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

The

following

terms

are

used

throughout

this

manual

bring

attention

the

presence

potential

hazards

important

information

concerning

the

product:

CAUTION:

Indicates

imminently

hazardous

situa-

tion

which,

not

avoided,

may

result

minor

injury

property

damage.

NOTE:

Used

notify

special

instructions

instal-

lation,

operation

maintenance which

are

important

equipment

but

not

personal

injury

haz-

ards.

1 .

RECEIVING

INSTRUCTIONS

Inspect

shipment

immediately

when

received

to deter-

mine

any

damage

has

occurred

the

crate

during

ship-

ment.

After

the

unit

has

been

uncrated,

check

for

any

visible

damage

the

unit.

Check

motor

position

and

turn

blower

wheel

determine

damage

has

occurred

these

criti-

cal parts.

any

damage

found,

the

cosignee

should

sign

the

bill

lading

indicating

such

damage

and

immediately

file

claim

for

damage

with

transportation

company.

PRE

INSTALLATION

INSTRUCTIONS

the

nit

received

and

uncrated,

check

the

exter-

nal

data

plate

and

all

labels

the

unit

for

type

of gas,

electrica

l ,

and

operational

specifications

to confir

tha

hese

agree

with

those

point

installation.

the

unit

equipped

with

Outdoor

Duct

Furnace,

also

check

the

ata

plate

and

all

labels

located

inside

each

furnace.

Every

rooftop

unit

will

include

informational

packet

which

will

include

the

following:

The

blower

manual,

out-

door

duct

furnace

and

evaporative

cooler/cooling

coil

manuals

(if

applicable

the

unit

order),

wiring

diagram(s),

and

special

controls/data

sheets.

ACCESS

PANEL

REMOVAL

Each

access

panel

held

place

with

two

"grip"

latches.

remove

access

panel:

use

slotted

head

screw

dri-

ver

to turn

the

latch

screwhead

counter

clockwise.

Using

the

handle

provided,

push

the

panel

upwards.

Pull

the

bot-

tom

the

panel

out

and

lower

the

panel

disengage

from

the top

lip.

replace

access

door

panel,

guide

-2-

the

panel

door

upwards on

the

tracks,

and

push

into

the

top

lip,

swing

and

lower

the

panel

place

until

engages

with

the

bottom

panel.

Turn

the

screwhead

each

latch

clockwise.

The

screw

must

turn

freely

one

quarter

turn

before

resistance

felt

order

for

the

lock

engage.

latch

does

not

hold,

turn

screw

counter-clock-

wise

several

turns

and

repeat

the

above

procedure.

RIGGING

Rig

unit

using

either

belt

cable

slings.

Use

spreader

bars

protect

the

top

the

unit

when

lifted.

See

fig-

ure

units

with

total

length of

less

than 104"

(2642

mm),

excluding

evaporative

cooler,

two

holes are

provided

the

base

rail

each

side

the

unit.

Slide

pipes

beneath

the

unit

through

these

holes

and

attach

rigging

pipes

for

lifting

the

unit.

units

with

total

length

104"

(2642

mm)

greater,

excluding evaporative

cooler,

lifting

lugs

attached

the

base

rail

are

provided.

Attach

rigging to

lugs

for

lifting

the

unit.

For

distance

between

lifting

lugs

and

total

unit

lengths,

refer

original

Submittal

Sheets

supplied

specified

for

the

unit.

Also

see

Center

Gravity

and

Weights

Sections

this

manual.

COMBUSTION

AIR

CONSIDERATIONS

The

presence

chlorine

vapors

other

corrosive

vapors

the

combustion

air

supply

for

gas-fired

heating equip-

ment

presents

potential

corrosive

hazard. Chlorine

will,

when

exposed

flame,

precipitate

from

the

compound

(usually

freon

degreaser

vapors)

and

into

solution

with

any

condensation

that

present

the

heat

exchang-

er or

associated

parts.

The

result

hydrochloric acid

which

will

readily

attack

all

metals,

including

300

grade

stainless

steel.

Care

should

taken

separate

these

vapors

from

the

combustion

process.

This

may

done

wise

location

the

unit

with

regard

exhausters

prevailing

wind

direction.

LOCATION

Before

placing

roofto

unit

its

permanent

location,

make

certain that

the

roof

capable

carrying

the

additional

load

this

equipment.

Check

the

unit

weight

given

the

end

this

manual.

Refer

Figure

for

required

clearances

combustible

material.

Figure

USE

SPRE

PREVE

USE SPRE

ADE R

BAR

PRE V

DAMAGE

MOUNTING/

LOCATIONS

These

units

are

suitable

for

installation

combustible

flooring.

Single,

double

and

triple

duct furnace

only

models

have

base

rails

which

can

mounted

either

solid

planking

steel

channels.

All

other

units

installed

field

furnished

supports

must

use

the

recommended

method

shown

Mounting

Field

Furnished

Supports

equivalent.

Roof

curb

kits

for

rooftop

units

are

shipped

unassembled.

Included

with

the

roof

curb

kit

are

insulated

uninsulated

curb

rails,

bolts

and

screws

needed

for

assembly,

sealant,

roll

self-adhering

rubber

gasketing,

and

installation

instructions.

Roof

insulation,

cant

stripping,

flashing,

roof

felts,

caulking,

and

nails

must

furnished

the

installer.

See

separate

roof

curb

specifications.

GENERAL

REQUIREMENTS

-3-

The

venting

integral

part

the

unit

and

must

not

altered

the

field.

The

Natural

Vented

units

are

equipped

with

ventcap

which

designed

for

natural

draft

venting.

Air

for

combustion

enters the

base

the

vent

cap

through

protective

grill

and

products

com-

bustion

are

discharged

the

upper

section

the vent

cap.

CAUTION

Insure

that

all

power

sources

conform

requirements

damage

the

unit

may

result

Installation

must

made

accordance

with

local

codes,

the

absence

local

codes,

with

the

latest

edition of

ANSI

Standard

Z223.1

(N.F.P.A.

No.

54)

National

Fuel

Gas

Code.

All

the

and

FPA

Standards

referred

these

installation

instructions

are

those

that

were

applicable

the time the

design

was

certified.

The

ANSI

Standards

are

available

from

the

American

Gas

Association,

1515

Wilson

Blvd.,

Arlington,

Virginia

22209.

The

NFPA

Standards

are

available

from

the

ational

Fire

Protection

Association,

Batterymarch

Park,

Quincy,

02269.

installed

Canada,

the

installation

must

conform

with

local

building

codes,

the

absence

local

building

codes,

with

the

current

CAN/CGA-B149.1

B149.2

"Installation

Codes

for

Gas

Burning Appliances

and

Equipment'.

hese

outdoor

duct

furnaces

have

been

designed

for

and

certified

comply

with

CAN/CGA

2.8.

These

units

have

been

designed

cert

for

outdoor

only

and

may

located

the

roof of

the

building

any

convenient

location

external

the

building

heated.

This

vent

cap

shipped

separate

carton

and

should

installed

per

the

Venting

section

the

Outdoor

Rooftop

Gas-Fired Duct

Furnace

Installation

and

Service

Manual.

The

Power

Vented

unit

has

induced

draft

venting

system.

The

combustion

air

inlet

and

prod-

ucts

combustion

discharge

grills

are

located

the

upper

section

the

Duct

Furnace

side

access

panel.

pilot

burner

plate

provided

the

Duct

Furnace

for

access

the

pilot

burner

and

ignition

system

without

removing

the

burner

drawer.

Clearance

between

the

external

unit

and

any

obstruction

must be

sufficient

for

proper

servicing

pull

out

burner

drawer.

See

Figure

for

this

clearance.

These

units

are

certified

for

operation

either

natural

propane

gases.

unit

installed

altitude

exceeding

2000

feet

(610

above

sea

level,

Berate

the

unit

input

each

duct

furnace

for

each

1000

feet

(305

above

sea

level.

Special

main

burner

gas

orifices

are

required

for

installations

above

2000

feet

(610

m).

Canada,

unit

installed

at altitudes

2000

feet

(610

4500

feet

(1372

m),

each

duct

furnace

must

have

the

main

burners

re-orificed to

give

90%

the

normal

altitude

input

rating.

the

unit

was

ordered

from

the

factory

for

high

altitude

operation

confirm

input

rating

See

Gas

Input

Adjustment

ow•

125

(

)

<.x)

-4-

Figure

18"

(457

mm)

FLOW

(45 7

mm)

Blower

Duct

Furnace

Duct

urnace

6 5

Refer

Outdoor

Duct

Furnace

Manual

for

spec

fic

clearances

Supply

Plenum

16"--

(457

mm)

single,

double

triple

duct

furnace

only

unit

III

INSTALLATION

connected

return

air

duct

any

other

inlet air

restriction,

the

appliance

shall

installed

the

positive

pressure

side

the

air

circulating

blower.

Installation

must

conform

with

local

building

codes

the

absence

local

codes

with

the

National

Fuel

Gas

Code

ANSI

Z223

latest

edi

heat

loss

study

and

complete

layout

the

sys-

tem

should

made

first.

When

locating

the

unit

its

permanent

location,

make

certain

that

the

roof

capable

carrying

the

additional

load

the

equipment.

Check

the

unit

net

weights

section

this

manual

Make

certain

that

clearances

are

provided

for

ser-

vice,

minimum

clearance

combustible

material

and

venting

cap.

See

figure

for

this

information.

Ducts

connected

units

which

not

have

either

blower

section

a supply

plenum

must

have a

removable

access

panel

the

duct,

which

con-

nected

duct

furnace.

The

duct

openings

shall

accessible

when

the

unit

installed

service

and

shall

such

size that

smoke

reflected

light

may

observed

inside

the

casing

indicate

the

presence

leaks

the

heating

element.

The

covers

for

the

panels

shall

attached

such

manner

prevent

leaks.

Ducts

exposed

the

outdoors

must

insulated

and

sealed

prevent

water

from

enter-

ing

either

the

unit

building

through

the

duct.

CAUTION:

Remove

wooden

shipping

support

from

beneath blower

housing

Blower

Section

prevent

possible

unit

damage

improper

unit

operation

(if

applicable).

INSTALLATION

CLEARANCES

Minimum

clearances

combustible

material

are

shown

the

unit

data

plate.

important

that

clearances

maintained

for

servicing

the

unit

(refer

Submittal

Insert

for

service clearances),

and

that

minimum

clearances

are

provided

from

the

unit

(including

vent

cap,

Natural

Vent

model)

com-

bustible

material.

Clearances

around

the

outside

air

hood

(if

unit

equipped)

must

unobstructed.

See

Figure

MOUNTING

FIELD

FURNISHED

SUPPORTS

Single,

double,

triple

duct furnace

only

models

have

base

rails

which

are

suitable

for

mounting

either

directly

solid

planking

steel

channels.

ever

install

the

unit

soft

roof

where

the

rails

could

sink,

reducing

clearance

between

the

bottom

panel

and

the

roof,

cause

damage

the

roofing surface.

All

other

models

must

use

the

following

method

equivalent

when

unit

supports

are

field

furnished:

Each

section

the

Rooftop

unit

must

supported,

which

includes

supports

located

both ends.

the

unit

consists

High

CFM

Blower

section,

Coil,

Duct

Furnace

and

Supply Plenum,

five

sup-

ports

are

required.

See

Figure

-5-

Suppo

clear

return

penin

Ins

ase

rai

g e

See

Figures

for

this

dimension.

Support

must

fit

inside

base

rail

lang

MOUNTING

ROOF

CURB

Assemble

and

install

roof

curb

per

Roof

Curb

Installation

Instructions.

See

Figures

for

roof

opening

sizes,

distance

between

openings

and

unit

relationship

roof

curb.

VENTINGt

All

venting

installations shall

accordance

with

the

latest

edition of

Part

"Venting

Equipment",

the

National

Fuel

Gas

Code,

ANSI

Z223.1-1992

(or

the

latest

edition),

applicable

provisions

local

building

codes.

The

Natural

Vente

nits'...

are

equipped

with

vent

cap

which

designed

for

atural

draft

venting.

Air

for

combustion

enters the

base

the

vent

cap

through

protective

grill

and

produc

combustion

are

dis-

charged

the

upper

section

the

vent

cap.

pped

separate

carton

and

hould

installed

per

the

Venting

section

the

Outdo

Rooftop

Gas

red

Duct

lla

on and

Service

Manual

The

Power

Vented

unit

has

induced

draft

venting

system.

The

combustion

air

inlet

and

products

combustion

discharge

louvers

are

located

the

upper

section

the

Duct

Furnace

side

access

panel.

Never

locate

these

units

area

where

the

flue

products

discharge

outlet

may

directed

any

fresh

air

vents.

See

the

Outdoor

Rooftop Gas-Fired

Duct

Furnace

Installation

and

Service

anual

for

installation

and

servicing

requirements.

DUCTCONNECTIONS

All

ductwork

must be

properly

supported

that

strain

put

the

unit.

not

alter

bend

the

dis-

charge

duct flanges supplied

your

furnace/air

handler.

Ducts

connected

units

which

not

have

either

blower

section

supply

plenum

must

have

removable

access

panel

the

duct

which

con-

nected

duct

furnace.

The

duct

openings

shall

accessible

when

the

unit

installed

service,

and

shall

such

size

that

smoke

reflected

light

may

observed

inside

the

casing

indicate

the

presence

leaks

the

heating

element.

The

covers

for

the

panels

shall

attached

such

manner

prevent

leaks.

Ducts

exposed

the

outdoors

must

insulated

and

sealed

prevent

water

from

either

the

unit

building

through

the

duct.

single,

double

triple

duct

furnace

only

unit

connected

return

air

duct,

any

other

inlet

air

restriction,

the

appliance

shall

installed

the

positive

pressure

side

the

air

circulating

blower.

When

connecting

return

air

duct

Standard

High

CFM

cabinets,

attach

duct

return

air

opening

flange

when

dampers

are

used. Otherwise,

dampers

are

used,

attach

return

air

duct

around

col-

lar

bottom

damper

assembly. Also

refer to

the

Submittal

Data

Sheets

specified

for

your

unit.

When

connecting

supply

air

duct

Supply

Plenum,

attach

duct

supply

air

opening

flange

when

dampers

are used.

Otherwise,

dampers

are used,

attach

supply

air

duct

around

collar

bottom

damper

assembly.

Refer

the

Figure

13.

GAS

PIPING

All

gas

piping

must

installed

accordance

with

local

codes.

required

that

ground

union

installed

adjacent

the

gas

valve

each

duct

fur-

nace,

and

ground

union

installed just

external

each

duct

furnace

for

unit

servicing.

vertical

runs,

drip

leg

should

provided

upstream

any

con-

trol

manifold.

gas

shutoff

valve

should

be,

may

required

local

codes,

installed

upstream

the

external

ground

union

for

each

duct

furnace.

1/8

inch

N.P.T.

plugged

tapping,

accessible

for

test

gauge

connection,

must

installed

immediately

upstream

the

unit

gas

supply

connection.

For

complete

Gas

Piping

installation,

see

Outdoor

Rooftop

Gas-Fired

Duct

Furnace

Installation

and

Service

Manual.

recommended

that

the

gas

piping

not

installed

through

the

bottom

the

duct

furnace

bot-

tom

panel.

piping

must

penetrate

the

duct furnace

bottom

panel,

must

sealed

prevent

water

leakage.

Gas

piping

must

installed

allow

for

removal

burner

drawer

for

unit

maintenance.

Refer

Figure

-6-

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