Instruction manual

ManualsBrandsAmana ManualsFurnaceGCI

A ground joint union, drip leg, and manual shutoff valve must also be

supplied by the installer. In some cases, the installer may also need

to supply a transition piece from 1/2" to another pipe size.

When the gas piping enters through the right side of the furnace, the

installer must supply the following fittings (starting at the gas valve):

• 90 degree elbow.

• Close nipple.

• 90 degree elbow.

• Straight pipe to reach exterior of furnace (Figure 19).

A ground joint union, drip leg, and manual shutoff valve must also be

supplied by the installer. In some cases, the installer may also need

to supply a transition piece from 1/2” to another pipe size.

Figure 19 - Gas Inlet Through Right Side (Counterflow)

“Left side” and “right side” above are as viewed for a counterflow

installation. Adaptation for horizontal airflow should be self explana-

tory.

GAS PIPING CHECKS

Before placing unit in operation, leak test the unit and gas connec-

tions.

WARNING

O AVOID THE POSSIBILITY OF EXPLOSION OR FIRE, NEVER USE A MATCH OR

OPEN FLAME TO TEST FOR LEAKS.

Check for leaks using an approved chloride-free soap and water

solution, an electronic combustible gas detector, or other approved

testing methods.

CAUTION

O PREVENT PROPERTY DAMAGE OR PERSONAL INJURY DUE TO FIRE, THE

FOLLOWING INSTRUCTIONS MUST BE PERFORMED REGARDING GAS

CONNECTIONS, PRESSURE TESTING, LOCATION OF SHUTOFF VALVE AND

INSTALLATION OF GAS PIPING.

NOTE: Never exceed specified pressures for testing. Higher

pressure may damage the gas valve and cause subsequent

overfiring, resulting in heat exchanger failure.

Disconnect this unit and shutoff valve from the gas supply piping

system before pressure testing the supply piping system with

pressures in excess of 1/2 psig (3.48 kPa).

This unit must be isolated from the gas supply system by closing its

manual shutoff valve before pressure testing of gas supply piping

system with test pressures equal to or less than 1/2 psig (3.48 kPa).

PROPANE GAS TANKS AND PIPING

WARNING

F THE GAS FURNACE IS INSTALLED IN A BASEMENT, AN EXCAVATED

AREA OR A CONFINED SPACE, IT IS STRONGLY RECOMMENDED TO

CONTACT A PROPANE SUPPLIER TO INSTALL A GAS DETECTING

WARNING DEVICE IN CASE OF A GAS LEAK.

•

INCE PROPANE GAS IS HEAVIER THAN AIR, ANY LEAKING GAS CAN

SETTLE IN ANY LOW AREAS OR CONFINED SPACES.

•

ROPANE GAS ODORANT MAY FADE, MAKING THE GAS UNDETECTABLE

EXCEPT WITH A WARNING DEVICE.

A gas detecting warning system is the only reliable way to detect a

propane gas leak. Rust can reduce the level of odorant in propane

gas. Do not rely on your sense of smell. Contact a local propane

gas supplier about installing a gas detecting warning system. If the

presence of gas is suspected, follow the instructions on Page 4 of

this manual.

All propane gas equipment must conform to the safety standards of

the National Board of Fire Underwriters, NBFU Manual 58.

For satisfactory operation, propane gas pressure must be 11 inch

WC at the furnace manifold with all gas appliances in operation.

Maintaining proper gas pressure depends on three main factors:

1. Vaporization rate, depending on temperature of the liquid,

and “wetted surface” area of the container or containers.

2. Proper pressure regulation. (Two-stage regulation is

recommended for both cost and efficiency).

3. Pressure drop in lines between regulators, and between

second stage regulator and the appliance. Pipe size will

depend on length of pipe run and total load of all appliances.

Complete information regarding tank sizing for vaporization, recom-

mended regulator settings, and pipe sizing is available from most

regulator manufacturers and propane gas suppliers.

Since propane gas will quickly dissolve white lead and most stan-

dard commercial compounds, special pipe dope must be used. Shel-

lac-based compounds resistant to the actions of liquefied petroleum

gases such as Gasolac

, Stalactic

, Clyde’s

or John Crane

are

satisfactory.

Refer to the following illustration for typical propane gas installations

and piping.

200 PSIG

Maximum

5 to 15 PSIG

(20 PSIG Max.)

Continuous

11" W.C.

Second Stage

Regulator

First Stage

Regulator

Figure 20 - Propane Gas Installation (Typ.)

X. CIRX. CIR

X. CIR

CULCUL

CUL

TINTIN

TIN

G AIR AND FILG AIR AND FIL

G AIR AND FIL

TERTER

TER

DUCTWORK - AIR FLOW

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 methods

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 Condi-

tioning, Warm Air Heating and Ventilating Systems. Pamphlets No.

90A and 90B.

A closed return duct system must be used, with the return duct con-

nected to the furnace. NOTE: Ductwork must never be attached to