Installing The Connecting Duct From The Existing Furnace - PSG Caddy PF01010 Installation And Operating Instructions Manual

N.B.: TO ENSURE ADEQUATE STATIC PRESSURE, THE SYSTEM SHOULD
BE BUILT IN A WAY THAT THE VOLUME OF COLD AIR RETURN IS AT
LEAST EQUAL OR SLIGHTLY HIGHER THAN THE VOLUME OF THE HOT
AIR DISTRIBUTION.
Figure 3.1.4.3 b - Hot air plenum minimal height.
The hot air plenum coming out of the furnace is to have a minimum height of 24"
(610 mm) if the top of the first vertical section is not flush with the first horizontal
section (see Figure 3.1.4.3 b). Otherwise, the minimum height is 15" (381 mm).
These dimensions for all hot air furnaces are in accordance with the standards
CSA B140.4, UL 391 and UL 727.

3.1.5.4 INSTALLING THE CONNECTING DUCT FROM THE EXISTING FURNACE

To install the connecting duct from the existing furnace on the left side of your CADDY
Add-on furnace, remove the screws (D) securing the large panel (E) on the left side of
the furnace (keep the screws and the panel; they will be installed later on the right
side). Remove the screws (A) securing the small panel (B) located in the large panel
that is on the right side of the furnace (you can dispose of the panel).
25