|
|
|
| Thermific® | Installation |
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
Whichever material is used, the termination must point down and must be backed by a metal plate secured to the wall.
Important: The chosen inlet termination must be included in the calculation of the maximum allowable equivalent length. See Section 3.4.5 for equivalent lengths.
Correct rain cap, | Typical incorrect |
unrestricted. | rain cap. |
If the combustion air inlet duct is routed through the roof, the termination must be either the same type as described for a sidewall installation or a rain cap. The rain cap must be unrestrictive type similar to the illustration below.
3.2.4 Inlet Duct Assembly at the Boiler
Transition |
|
| Damper | ||
|
|
|
| Round | |
|
|
| |||
Duct |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Damper
Housing
(Sidewall installation shown.)
The boiler is equipped with a special collar attached to the air inlet opening on the back of the unit (at the blower housing on Series 700, 1000, and 1200; at the back of the cabinet on Series 1500, 1700 and 2000.). A separate box of accessories is sent with the boiler.
1.Attach the 6 inch diameter end of the custom transition duct and the extension to the collar using a minimum of 4 sheet metal screws spaced approximately at 90 degree intervals. This joint must then be wrapped with an aluminum tape backed on the contact side with an adhesive. Do not use "duct tape."
Important: do not insulate the transition duct or extension.
Roof
Transition
Duct
Round
Damper
90o Elbow
Damper
Housing
Refer to Section 3.2 for instructions for installing and wiring the auxiliary control panel; it is required if the optional inlet damper is used.
3.2.4.1 Sealing PVC Duct Tubing to the Inlet Duct
Apply a 3/4" wide x 1/8" thick gasket to the outside surface edge of the entire circumference of the transition duct (or extension). A closed cell foam rubber gasket with pressure sensitive adhesive works very well. Insert 3/4" of the transition duct into the PVC duct tubing so that the gasket lines up with the edge of the PVC tubing. Lay an approximate 3/8" wide bead of GE
(Roof installation shown.)
cure for 24 hours. The cure time can be shortened
Page 4
