Trane Gas Unit Heaters Installation Manual download pdf (Page 19)

Installation: Piping

GKND-SVX01B-EN 19

1. The combustion air system installation must be in

accordance with the latest edition of (N.F.P.A. 54) ANSI

Z223.1 National Fuel Gas Code. In Canada, installation

must be in accordance with CAN/CanGa-B149.1

“Installation Code for Natural Gas Burning Appliances

and Equipment” and CAN/CanGa-B149.2 “Installation

Code for Propane Burning Appliances and Equipment”.

2. A Breidert Type L or Fields inlet cap, furnished by the

customer, must be installed at the termination point of

the combustion air system (see Figure 11, p . 21

through Figure 14, p. 21).

Note: The top

of the inlet cap is to be no less than

12 inches (305 mm) from the top of the vent cap

(see Figure 11, p. 21 through Figure 14, p. 21).

3. Use single wall pipe constructed of 26 gauge

alvanized steel or a material of equivalent durability

and corrosion resistance for the combustion air

system.

4. Long runs of single wall combustion air piping passing

through a

n unheated space may require insulating if

condensation becomes noticeable.

5. The combustion air system mu

st be installed to

prevent collection of condensate. Pitch horizontal

pipes downward 1/4 inch per foot (21 mm/m) toward

the inlet cap

to facilitate drainage. Vertical combustion

air pipes should be piped as depicted in Figure 11 ,

p. 21.

6. The equivalent length of the com

bustion air system

must not be less than five feet (1.5 m) and must not

exceed 50 feet (15.2 m). Equivalent length equals the

total length of straight pipe, plus 15 feet (4.6 m) for

eac

h 90-degree elbow and five feet (1.5 m) for each

45-degree elbow.

Note: F

or optimum performance, keep the

combustion air system as straight as possible.

7. Each slip joint must be secured with at least three

cor

rosion resistant screws. Two full turns of 3M™ #425

Aluminum Foil Tape or its equivalent must then be

used to seal each joint. General Electric RTV-108, Dow

Corning

RTV-732 or an equivalent may be used

instead of the tape.

8. For horizontal combustion air systems longer than five

feet (1

.5 m), the system must be supported from

verhead building structures at three-foot (1-m)

intervals.

Exhaust Venting

1. Vent system installation must be in accordance with

the latest edition of (N.F.P.A. 54) ANSI Z223.1 National

Fuel Gas Code. In Canada installation must be in

accordance with CAN/CanGa-B149.1 “Installation

Code for Natural Gas Burning Appliances and

Equipment” and CAN/CanGa-B149.2 “Installation

Code for Propane Burning Appliances and Equipment”.

2. A Breidert Type L or Fields vent cap, furnished by the

stomer, must be installed at the termination point of

the vent system (see Figure 11 , p . 21 through

Figure 14, p. 21).

3. Use single wall pipe constructed of 26 gauge

alvanized steel or a material of equivalent durability

and corrosion resistance for the vent system. For

installations in Canada, use corrosion resistant and

gas-tight, listed vent pipe conforming with local

building codes, or in the absence of local building

codes, with current CAN/CanGa-B149.1, “Installation

Codes for Natural Gas Burning Appliances and

Equipment” or CAN/CanGa-B149.2, “Installation

Codes for Propane Gas Burning Appliances and

Equipment”.

4. Any run of single wall vent pipe passing through an

heated space must be insulated with an insulation

suitable to 550°F (288°C).

5. The vent system must be insta

lled to prevent collection

of condensate. Pitch horizontal pipes downward 1/

4 inch per foot (21 mm/m) toward the vent cap to

facilitate drainage. Vertical vent pipes should be piped

as depicted in Figure 11 , p . 21 and Figure 12, p. 21.

6. The equivalent length of the vent system must not be

less than fi

ve feet (1.5 m) and must not exceed 50 feet

(15.2 m). Equivalent length equals

the total length of

straight pipe plus 15 feet (4.6 m) for each 90-degree

elbow and five feet (1.5 m) for each 45-degree elbow.

7. Each slip joint must be secured with at least three

cor

rosion resistant screws. Two full turns of 3M™ #425

Aluminum Foil tape or its equivalent must be used to

seal each joint. General Electric RTV-108, Dow

Corning

RTV-732, or an equivalent may be used

instead of the tape.

8. For horizontal vent systems longer than five feet

.5 m), the system must be supported from overhead

ilding structures at three-foot (1-m) intervals.

9. The exhaust vent system must remain at a minimum

distance of six

inches (152 mm) from all combustible

materials. Any part of the vent system that passes

through a combustible material must be properly

insulated.

Note: Incr

easing the clearance distances may be

necessary if there is a possibility of distortion or

discoloration of adjacent materials.

For a VERTICAL vent pipe section that passes through

a floor or roof, an opening four inches (102 mm)

greater in diameter is required. The opening must be

insulated and flashed in accordance with applicable

installation codes.

A HORIZONTAL section of an exhaust vent system that

passes through a combustible wall must be

constructed and insulated as shown in Figure 13, p. 21

and Figure 14, p. 21.

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Trane Gas Unit Heaters Installation Manual Page 19

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