Modine PDP150LP Manual de instrucciones descargar pdf (Pagina 6)

6-560.4

A4. Refer to Table 6.1 for total minimum and maximum vent

lengths, making the system as straight as possible. The

equivalent length of a 90° elbow is 5 feet for 4 inch

diameter and 7 feet for 6 inch diameter.

A5. Horizontal sections of vent pipe are to be installed with a

minimum downward slope from the appliance of 1/4 inch

per foot and suspended securely from overhead structures

at points not greater than 3' apart.

A6. Fasten individual lengths of vent together with at least 3

corrosion-resistant sheet metal screws.

A7. Keep single wall vent pipe at least 6" from combustible

materials. For double wall vent pipe, follow the vent pipe

manufacturer’sclearancestocombustibles.Theminimum

distance from combustible materials is based on the

combustible material surface not exceeding 160°F.

Clearance from the vent pipe (or the top of the unit) may be

required to be greater than 6" if heat damage other than fire

could result (such as material distortion or discoloration).

A8. Avoid venting through unheated space when possible.

When venting does pass through an unheated space or if

the unit is installed in an environment that promotes

condensation, insulate runs greater than 5' to minimize

condensation. Inspect for leakage prior to insulating and

use insulation that is noncombustible with a rating of not

less than 400°F. Install a tee fitting at the low point of the

vent system and provide a drip leg with a clean out cap as

shown in Figure 8.1.

Section A - General Instructions - All Units

A1. If the unit heater being installed is replacing existing

equipment and using the existing vent system from that

equipment, inspect the venting system for proper size and

horizontal pitch, as required in the National Fuel Gas Code,

ANSI Z223.1 (NFPA 54) or CSA B149.1 Installation Code -

latest edition and these instructions. Determine that there is

no blockage or restriction, leakage, corrosion and other

deficiencies, which could cause an unsafe condition.

A2. The vent pipe should be galvanized steel or other suitable

corrosion-resistant material. Follow the National Fuel Gas

Code for minimum thickness of vent material. The minimum

thickness for connectors varies depending on the pipe

diameter. Do not vent unit with PVC or other forms of

plastic venting material.

A3. All heaters come with a factory installed vent adapter for

attaching the vent pipe to the heater (see Table 6.1). Attach

the vent pipe to the adapter with 3-corrosion resistant

screws. (Drill pilot holes through the vent pipe and adapter

prior to screwing in place). Vent pipe must not be smaller

than the connector size.

INSTALLATION - VENTING

Figure 6.1 - Venting Through Combustible Roof

or Wall

 See Instruction A12 for attaching single wall pipe to double wall pipe

Specified

Terminal

Flashing

Listed

Thimble

Specified

Terminal

Flashing

Clearance Specified

by Type B Vent Mfg.

Listed

Thimble

Single Wall Vent Pipe

Double Wall Vent Pipe 

Single Wall Vent Pipe Terminating

with Double wall vent pipe. 

Single Wall Vent Pipe

Double

Wall

Single

Wall

Specified

Terminal

Clearance Specified

by Type B Vent Mfg.

Single

Wall

Specified

Terminal

1. Gas fired heating equipment must be vented - do not

operate unvented.

2. A built-in power exhauster is provided - additional external

power exhausters are not required or permitted.

3. If an existing heater is being replaced, it may be

necessary to resize the venting systems. Improperly sized

venting systems can result in vent gas leakage or the

formation of condensate. Refer to the National Fuel Gas

Code ANSI Z223.1 (NFPA 54) or CSA B149.1 - latest

edition. Failure to follow these instructions can result in

serious injury or death.

4. Under no circumstances should 2 sections of double wall

vent pipe be joined together within 1 horizontal vent

system due to the inability to verify complete seal of inner

pipes.

CAUTION

Installation must conform with local building codes or in the

absence of local codes, with Part 7, Venting of Equipment, of

the National Fuel Gas Code, ANSI Z223.1 (NFPA 54) - latest

edition. In Canada installation must be in accordance with

CSA B149.1.

Model PTP unit heaters must be vented with the proper

passageway as described in these instructions to convey flue

gases from the unit or the vent connector to the outside

atmosphere.

The venting instructions are organized in sections, based on

installation type. The sections are identified as follows:

 ThedifferencesbetweenVerticalandHorizontalventsystemswillbeidentied

in "Section A - General Instructions - All Units".

ARNING

Instructions

Applicable Installation Instructions

by Vent System Type

A General Instructions for ALL Installations

B VERTICAL CATEGORY I vent systems ➀

C HORIZONTAL CATEGORY III vent systems ➀

Table 6.1 - Vent Pipe Diameters, Transitions, and

Total Equivalent Vent Pipe Lengths for Horizontal

Venting Systems

Model

Size

Vent Pipe

Diameter

Equivalent Vent Length

Minimum Maximum

150 4" 3' 50'

175-200 4" 3' 70'

250-400 6" 3' 70'

1 2 3 4 5 6 7 8 9 10 11 ... 19 20

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Modine PDP150LP Manual de instrucciones Pagina 6

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