G115 Direct Vent Installation Instructions

General Guidelines:

1. The oil-fired boiler installation must be performed by a qualified installer in accordance with the

regulations put forth in NFPA-31 Installation of Oil-Burning Equipment. The installation must

comply with all local codes and authorities having jurisdiction. The installer must have the proper

licensing and be experienced with all local codes and regulations.

2. Select boiler location and wall termination

positions based on required boiler clearances. (See

Table 1), the guidelines of pages 3 and 4,

compliance with local codes and on using

minimum lengths of vent pipe.

3. Select the point of wall penetration for the

exhaust termination based on maintaining a

minimum slope of ¼" per foot down towards the

termination on the last horizontal pipe section.

The wall termination assembly must also slope ¼"

per foot down towards the outside. This allows

possible condensate to drain from the venting

system.

4. Slope all other horizontal pipe runs ¼" per foot down towards the boiler vent connection.

(Fig. 3).

5. Avoid any dips in the venting when using the flexible insulated stainless steel oil vent.

Never

install a barometric damper into the exhaust piping.

Minimum wall clearance (L1)needed for:

• flex. Stainless Steel oil vent: 24"

• 4" galvanized pipe: 16"

The Buderus G115 Direct Vent boiler system has been approved for use with two different intake/exhaust

options. Follow the guidelines on pages 3 and 4 regarding termination placement.

Option 1:

Separate air intake hood and Aerocowl exhaust termination

. (Part No. AT-4).

This system consists of a 4" air intake hood, a 5" x 4" reducer and a 26½" long, insulated Aerocowl

exhaust termination. This termination has a zero clearance rating to combustibles.

Option 2:

Combination air intake/exhaust termination.

(Part No. FT-4).

This system consists of a 5" x 4" reducer and a zero clearance concentric combination intake/exhaust

termination with a 4" provision for fresh air intake piping.

Both exhaust terminations are approved for use with two different exhaust vent pipe options. Always use

4" galvanized or 4" flexible metal pipe for fresh air intake for both venting systems.

Pipe Option 1: Flexible, insulated 4" stainless steel oil vent. Maximum length of 10 ft. Oil

vent adaptors are supplied. The insulated oil vent is rated for 1" clearance to combustibles. Wrap the

adaptors with 3” of ceramic wool covered with foil tape or sheet metal to maintain 1” clearance.

Pipe Option 2: Standard, 26 gauge galvanized vent pipe. Maximum straight length is 6 ft with

up to 2 90º elbows. Maintain 18" clearance to combustibles with galvanized vent pipe.

2 Installation Procedures for Venting System

Figure 3