Thermific® Gas-Fired Boiler

Installation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Whichever termination is chosen, it must be double wall vent certified under UL 1738, or ULC-636. When installing a sidewall exhaust system the termination must be backed by a metal plate secured to the wall as shown in the figure.

Correct rain cap,

Typical incorrect

unrestricted.

rain cap.

If the exhaust vent is routed through the roof, the termination must be either the same type as described for a sidewall installation or a rain cap. The preferred method to terminate the exhaust vent is with a rain cap to minimize the drippage of condensate onto the roof and ice build-up.The rain cap should be an

Flue Gas

Outlet

unrestrictive type similar to the figure above. Elbows are also acceptable.

3.4.5 Equivalent Length of Fittings

Fitting Description

Equivalent Length

90º Elbow

10 feet

45º Elbow

5 feet

Rain Cap

10 feet

Boot Tee/135º Tee

10 feet

Standard Tee Used as a

10 feet

Vent Termination

 

 

 

3.4CLEARANCES

In addition to any clearance requirements in Sections

3.1and 3.3 the following clearances must be maintained for inlet and vent components.

3.4.1 Sidewall Installations

Flue Gas

Outlet

Combustion

Air Intake

2' to snow line

Page 7

Page 9
Image 9
Patterson-Kelley DVSCM-02 owner manual Equivalent Length of Fittings, Sidewall Installations