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I R

I RC U L

C U L

C U LA

AT I N G

T I N G

I R

A N D

I L

I LT E R S

T E R S

ROPANE

IPING

HARTS

3/8"

1/2"

5/8"

3/4"

7/8"

1/2"

3/4"

730

1,700

3,200

5,300

8,300

3,200

7,500

500

1,100

2,200

3,700

5,800

2,200

4,200

400

920

2,000

2,900

4,700

1,800

4,000

370

850

1,700

2,700

4,100

1,600

3,700

330

770

1,500

2,400

3,700

1,500

3,400

300

700

1,300

2,200

3,300

1,300

310

260

610

1,200

1,900

2,900

1,200

2,600

100

220

540

1,000

1,700

2,600

1,000

2,300

125

200

490

900

1,400

2,300

900

2,100

150

190

430

830

1,300

2,100

830

1,900

175

170

400

780

1,200

1,900

770

1,700

200

160

380

730

1,100

1,800

720

1,500

Sizing Between First and Second Stage Regulator*
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.

Nominal Pipe Size

Schedule 40

Tubing Size, O.D. Type L

Pipe or
Tubing

Length,

Feet

3/8"

1/2"

5/8"

3/4"

7/8"

1-1/8"

1/2"

3/4"

1-1/4" 1-1/2"

199

329

501

935

275

567

1,071

2,205

3,307

131

216

346

630

189

393

732

1,496

2,299

107

181

277

500

152

315

590

1,212

1,858

145

233

427

129

267

504

1,039

1,559

131

198

376

114

237

448

1,417

121

187

340

103

217

409

834

1,275

104

155

289

185

346

724

1,066

100

138

255

162

307

630

976

125

122

224

146

275

567

866

150

109

202

132

252

511

787

200

100

187

112

209

439

665

250

172

100

185

390

590

Pipe or

Tubing

Length,

Feet

Nominal Pipe Size

Schedule 40

Tubing Size, O.D. Type L

Sizing Between Second Stage and Appliance Regulator*
Maximum Pro pane Capacities listed are based on 2 psig p re ssure drop a t 10 psig setting.
Cap acities in 1,000 BTU/h our.

I R

I RC U L

C U L

C U LA

ATING

TING

I R

A N D

I L

I LTERS

TERS

EVER

ALLOW

THE

PRODUCTS

COMBUSTION

INCLUDING

CARBON

MONOXIDE

ENTER

THE

RETURN

DUCT

WORK

CIRCULATION

AIR

SUPPLY

WARNING

Duct systems and register sizes must be properly designed for the
CFM and external static pressure rating of the furnace. Ductwork
should be designed in accordance with the recommended meth-
ods of “Air Conditioning Contractors of America” Manual D.

A duct system must be installed in accordance with Standards of
the National Board of Fire Underwriters for the Installation of Air
Conditioning, Warm Air Heating and Ventilating Systems. Pamphlets
No. 90A and 90B.

A closed return duct system must be used, with the return duct
connected to the furnace. NOTE:

NOTE:

Ductwork must never be at-

tached to the back of the furnace. For installations requiring more
than 1800 CFM, use a bottom return or two sided return. Supply and
return connections to the furnace may be made with flexible joints
to reduce noise transmission. To prevent the blower from inter-
fering with combustion air or draft when a central return is used, a
connecting duct must be installed between the unit and the utility
room wall. A room, closet, or alcove must not be used as a return air
chamber.

When the furnace is used in connection with a cooling unit, the
furnace should be installed in parallel with or on the upstream side
of the cooling unit to avoid condensation in the heating element.

With a parallel flow arrangement, the dampers or other means used
to control the flow of air must be adequate to prevent chilled air
from entering the furnace and, if manually operated, must be
equipped with means to prevent operation of either unit unless the
damper is in the full heat or cool position.

When the furnace is installed without a cooling coil, it is recom-
mended that a removable access panel be provided in the outlet air
duct. This opening shall be accessible when the furnace is installed
and shall be of such a size that the heat exchanger can be viewed
for visual light inspection or such that a sampling probe can be
inserted into the airstream. The access panel must be made to pre-
vent air leaks when the furnace is in operation.

When the furnace is heating, the temperature of the return air
entering the furnace must be between 55°F and 100°F.

When a furnace is installed so that supply ducts carry air circulated
by the furnace to areas outside the space containing the furnace,
the return air shall also be handled by a duct sealed to the furnace
casing and terminating outside the space containing the furnace.

ILTERS

- R

EAD

HIS

ECTION

EFORE

NSTALLING

ETURN

UCTWORK

Filters must be used with this furnace. Discuss filter maintenance
with the building owner. Filters do not ship with this furnace, but
must be provided by the installer. Filters must comply with UL900
or CAN/ULCS111 standards. If the furnace is installed without filters,
the warranty will be voided.

NOTE:

TE:

TE: An undersized opening will cause reduced airflow. The

bottom return is set up as a knock out.

PRIGHT

I I I I I

NSTALLATIONS

Depending on the installation and/or customer preference, differ-
ing filter arrangements can be applied. Filters can be installed in
the central return register or a side panel external filter rack kit
(upflows), or the ductwork above a downflow furnace. As an alter-
native, a media air filter or electronic air cleaner can be used as the
primary filter.

IRCULATION

ILTERS

One of the most common causes of a problem in a forced air heat-
ing system is a blocked or dirty filter. Circulating air filters must be
inspected monthly for dirt accumulation and replaced if necessary.
Failure to maintain clean filters can cause premature heat exchanger
failure.

A new home may require more frequent replacement until all con-
struction dust and dirt is removed. Circulating air filters are to be
installed in the return air duct external to the furnace cabinet.

FURNACE INPUT

FILT ER SIZ E

70M

768 in

90M

960 in

115M

1022 in

D ISP OSA B LE N OM IN A L 300 F .M . F A C E VELOC IT Y

M INIM UM FIL TER SIZES fo r DISPOSABL E FIL TERS