Connecting Pipe And Manual Damper - 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 3.2.2.3 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 3.2.2.3 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.

3.2.2.4 CONNECTING PIPE AND MANUAL DAMPER

The flue outlet on the Caddy wood only furnace is 6 inch inside diameter. In case
of excessive draft, a barometric draft control must be installed. The barometric
drafty control must be set so that the draft measured at the furnace outlet does
not exceed -.06 in. W.C. Draft above -.06 in W.C. could result in an
uncontrollable fire and furnace overheats. However, draft should not drop below -
.04 in W.C. in the smoke pipe.
WARNING
DO NOT INSTALL A MANUAL DAMPER ON THIS FURNACE.
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