VENT/AIR-INLET TERMINATION CLEARANCES. NTI Trinity Tx200, Trinity TX101, Trinity TX151(C), Trinity TX81, Trinity Tx200C

Termination Clearances

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5.0 VENT/AIR-INLET TERMINATION CLEARANCES

Tx I&O Manual

The quick reference table below is to be read in conjunction with the numbered notes as indicated, Figures 5-1 and 5-2, and the Venting Rules and Guidelines in Section 4.0. The instructions detailed in this section are a combination of Trinity Tx specific and National Gas Code restrictions.

Compliance alone doesn’t insure a satisfactory installation as good common sense must also be applied. Failure to follow these instructions may result in fire, property damage, serious injury or death.

Table 5-1 Termination Clearances Quick Reference Table (See Figures 5-1 and 5-2)

Canada

1

USA

2

Clearances to Air-Inlet Termination

Min. Distance Min. Distance

A Above grade/roofline and snow level

8

B Above roof line - Concentric Vent

6, 11, 13

12 in. 305 mm 12 in. 305 mm

24 in. 610 mm 24 in. 610 mm

C To exhaust vent from any other boiler

Clearances to Exhaust Vent Termination

A Above grade/roofline and snow level

8

D Minimum vertical separation above air inlet

9

E Minimum horizontal separation from air inlet

3

F Window or door that may be opened, or other building opening

G To combustion air inlet of any other appliance

H Non-mechanical air supply inlet to building

I Mechanical air supply inlet to building

4

J Soffit, overhang, eave or parapet

K Soffit vent or vent opening in an overhang, eave or parapet

L Outside corner

10

36 in. 915 mm 12 in. 305 mm

Min. Distance Min. Distance

12 in. 305 mm 12 in. 305 mm

18 in. 457 mm 18 in. 457 mm

4 in. 102 mm 4 in. 102 mm

36 in. 915 mm 12 in. 305 mm

36 in. 915 mm 12 in. 305 mm

36 in. 915 mm 12 in. 305 mm

6 ft. 1.83 m 3 ft. 915 mm

24 in. 610 mm 24 in. 610 mm

6 ft. 1.83 m

-

-

6 ft. 1.83 m

- -

M Inside corner of an L-shaped structure (including walls and fences)

U Above, under or near exterior stairs

V Into a canopy or carport

36 in. 915 mm 36 in. 915 mm

N Service regulator / vent outlet 36 in. 915 mm 36 in. 915 mm

P Each side of center line above or below meter / regulator assembly

5

36 in. 915 mm 36 in. 915 mm

Q Above a paved sidewalk, driveway, or parking lot on public property if adjacent

12

7 ft. 2.13 m 7 ft. 2.13 m

X X X X

R Above a public walkway

S Above a sidewalk or paved driveway that is located between two single family dwellings and services both dwellings

T Under a concrete veranda, porch, deck, or balcony

7

X

24 in.

X X X

610 mm 24 in. 610 mm

X

X

X

X

X

X

X

X

Notes:

1 - Canadian installations must comply with the current CSA B149.1 Natural Gas and Propane Installation Code and local building codes.

2 - US installations must comply with current ANSI Z223.1/ NFPA 54 National Fuel Gas Code and local building codes.

3 - Horizontal separation center-to-center (c.c.) 4”-12” (102-305 mm).

4 - For US installations, an exhaust vent must be 3 ft above a mechanical air supply inlet if within 10 ft. [3 m] horizontally.

5 Horizontal clearance must be observed up to a height of 15 ft. [4.6 m] above/below the meter, regulator, or relief devices

.

6 - Concentric Vent must protrude from the roof precisely 24” [610 mm] measuring from the terminal end-cap vanes.

7 - Permitted if veranda, porch, deck, or balcony is made of concrete and a minimum of two sides are fully open beneath.

8 - 24” is the recommended snow level allowance above grade/roofline or any surface that will support snow, debris, or ice

(i.e. for roof venting clearances - roofline and snow level). If living in a snowfall region, consult your local weather office for the maximum typical snowfall for your area.

9 - Note that the vent must maintain a minimum vertical distance above the air-inlet. Example: Vent height = 18” (457 mm) above air inlet + 12” (305 mm) for air inlet above grade/roof line and snow level = 30” (762 mm) above grade and snow level.

10 Clearances to an outside corner to be in accordance with local installation codes.

11 In Canada, concentric vent materials are subject to approval by local inspectors. See Termination Kits in Section 4.0.

12 Above public walkways, driveways or parking lots if adjacent to it and condensate cannot drip, freeze, or create a hazard.

13 Contact the manufacturer for special exemptions relating to multiple boiler installations using concentric vents.

_

X

-

Not permitted by National gas code(s) and/or recommended by boiler manufacturer.

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Tx I&O Manual

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Termination Clearances

Figure 5-1 Termination Clearance Quick Reference Diagram (See Table 5-1)

Illustrations of Termination Clearances

Figure 5-2 Sidewall Termination (See Table 5-1)

Clearances “F” and “G”

Canada

– Minimum 3 ft [915 mm]

The US

– Minimum 1 ft [305 mm]

Two-Pipe

Termination

F

Clearance “Q”

Adjacent to Public

Walkway or Driveway

Minimum 7ft [2.13 m]

Q

G

Concentric Vent

Termination

G

– Letter represents a specific Termination Position. Refer to Table 5-1 for corresponding termination clearances.

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Termination Clearances

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Tx I&O Manual

Extra precaution must be taken to adequately support the weight of the Vent/Air-inlet piping in applications using roof-top terminations. Failure to follow these instructions may result in venting or boiler component failure resulting in flue gas spillage leading to property damage, serious injury or death.

Under no circumstances may an existing chimney or chase-way be used to vent or provide combustion intake air to a Trinity Tx. Failure to follow these instructions will result in fire, property damage, serious injury or death.

Removing an Existing Boiler from Common Venting System

Do not install the Trinity Tx into a common venting system with any other boiler. Failure to comply with this warning will cause flue gas spillage and leech carbon monoxide emissions into the surrounding air resulting in serious injury or death.

When an existing boiler is removed from a common venting system, the common venting system is likely to be too large for proper venting of the remaining boilers connected to it. Instructions have been provided on how to remove the existing boiler and how to resize the remaining venting system. Failure to follow these instructions may result in property damage, serious injury or death.

Upon removal of an existing boiler, the following steps shall be followed for each boiler remaining in the common venting system; prior to commencing this procedure, shutdown all boilers remaining in the common venting system.

Steps to Removing an Existing Boiler:

1. Seal any unused openings in the common venting system.

2. Visually inspect the venting system for proper size and horizontal pitch. Verify that there is no blockage, restriction, leakage, corrosion or other deficiencies which could cause an unsafe condition.

3. Insofar as is practical, close fireplace dampers, all building doors and windows and all doors between the space in which the boilers remaining connected to the common venting system are located and other spaces of the building. Turn on clothes dryers and any boiler not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan.

4. Place in operation the boiler being inspected. Follow the applicable lighting instructions. Adjust thermostat so boiler will operate continuously.

5. Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette, cigar or pipe.

6. After it has been determined that each boiler remaining connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas burning boiler to their previous condition of use.

7. Any improper operation of the common venting system should be corrected so the installation conforms to the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CAN/CSA B149.1, Natural Gas and Propane

Installation Code. When resizing any portion of the common venting system, the common venting system should be resized to approach the minimum size as determined using the appropriate tables in Part 11 of the

National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CAN/CSA B149.1, Natural Gas and Propane

Installation Code.

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