Crestron electronic 3.5, 2.5, 1.5 Approved Stainless Steel Vent Manufacturers Make Model

2 General venting

When a sidewall or vertical rooftop combustion air supply system is disconnected for any reason, the air inlet pipe must be resealed to ensure that combustion air will be free of contaminants and supplied in proper volume.

￿ DANGER	Failure to properly seal all joints and seams
	as required in the air inlet piping may
	result in flue gas recirculation, spillage
	of flue products and carbon monoxide
	emissions causing severe personal injury
	or death.

Vent and air piping

This product has been approved for use with stainless steel vent systems.

Installation & Operation Manual

Air intake/vent connections

1.Combustion Air Intake Connector (FIG. 2-1) - Used to provide combustion air directly to the unit from outdoors. A fitting is provided with the unit for final connection. Combustion air piping must be supported per guidelines listed in the National Mechanical Code, Section 305, Table 305.4 or as local codes dictate.

2. Vent Connector (FIG. 2-1) - Used to provide a passageway for conveying combustion gases to the outside. A transition fitting is provided on the unit for final connection. Vent piping must be supported per the National Building Code, Section 305, Table 305.4 or as local codes dictate.

￿WARNING

NOTICE

Use only the materials, vent systems, and terminations listed in Table 2A. DO NOT mix vent systems of different types or manufacturers, unless listed in this manual. Failure to comply could result in severe personal injury, death, or substantial property damage.

Installations must comply with applicable national, state, and local codes. Stainless steel vent systems must be listed as a UL-1738 approved system for the United States and a ULC-S636 approved system for Canada.

Figure 2-1Combustion Air Adapter

	AIR PIPE
(FIELD SUPPLIED)
SHIPPED LOOSE		ADAPTER
WITH THE BOILER			GASKET

NOTICE	Installation of a stainless steel vent system
	should adhere to the stainless steel vent
	manufacturer’s installation instructions
	supplied with the vent system.
NOTICE	The Crest is supplied with an integral
	FasNSeal vent connector (FIG. 2-1). The
	installer must use a specific vent starter
	adapter supplied by the vent manufacturer
	to adapt to different vent systems.

VENT PIPE

(FIELD SUPPLIED)

CONNECTOR

The Crest uses model specific combustion air intake and vent piping sizes as detailed in Tables 2B and 2C on page 17.

NOTICE	Increasing or decreasing combustion air
	or vent piping to sizes not specified in this
	manual is not authorized.

Table 2A Approved Stainless Steel Vent Manufacturers

Approved Stainless Steel Vent Manufacturers

Make	Model
ProTech Systems (Simpson Dura-Vent Co.)	FasNSeal Vent
Z-Flex (Nova Flex Group)	Z-Vent
Heat Fab (Selkirk Corporation)	Saf-T Vent
Metal Fab	Corr/Guard
Securities Chimneys International	Secure Seal SS
Schebler Chimney Systems	eVent

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