Dettson Chinook C15-M-V Instructions D'installation Et Manuel Du Propriétaire page 10

9. On the remaining 3 outlet stub, connect caps
(1x5/8" and 2x1/2"). These caps are provided in
the parts bag.
3.2 DOWNFLOW
SEE FIGURE 3 FOR INSTALLATION DETAILS
CAUTION
It is STRONGLY RECOMMENDED to use the
optional downflow base to ensure the 1" clearance
around the supply duct going through the floor
and the proper slope of the furnace for condensate
drainage. Also, the base allows sufficient spacing
for the venting and the drain trap.
When installing the furnace in downflow position, make
sure the furnace is tilted foward to make it drain properly.
Plan your installation to have at least 1.0 ft. of clearance
under the installed furnace to put the exhaust pipe
drainage and drain trap.
Figure 3 – Downflow position
3.2.1 Downflow condensate drain trap
connection
1. Remove all condensate tubing from the inducer
blower, condensate box and vent collector. Block
the openings with the provided 5/8" and 1/2" black
caps. In the downflow position, the only connection
to the drain trap comes from the condensate box.
The inducer blower will be drained through the
exhaust pipe.
2. Remove the downflow drain trap knock-out.
3. Place the drain trap gasket on the drain trap.
4. Install the drain trap.
5. Screw the drain trap in place with two head tapping
screws on the side of the furnace.
6. Install two 1/2" black plastic caps on the unused
1/2" inlets of the drain trap inside the furnace.
7. Cut the required length of 5/8" tubing and connect
one end on the downflow port of the condensate
box. See figure 3 for port location.
8. Connect the other end to the 5/8" inlet of the drain
trap and secure the tubing on the gas manifold with
a tie wrap.
9. Connect the outlet of the drain trap to the
condensate drain piping with a tee. DO NOT vent
using the remaining 3 inlet of the drain trap. If a
condensate pump is used, make sure it is approved
for acidic condensate.
10. Make sure the 5 unused inlets of the drain trap are
plugged with provided plastic caps.
11. Si une pompe a condensat doit être utilisée,
assurez-vous qu'elle soit compatible avec le
condensat acide.
3.2.2 Downflow multiposition pressure
switch connection
The 3/16" stub just beside the drain of the condensate
box must be drilled or cut open. Use the supplied black
squared PVC tubing to connect the pressure switch (-0.2
in. w.c.) to this stub. (see figure 5)
The pressure switch must also be electrically connected
in series with the low fire pressure switch (top) using the
brown jumper provided in the parts bag. Refer to figure 4
for more details.
Figure 4 – Downflow position pressure switch
assembly
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