Condensate Drains; Preparations For Vent And Draining Option - Napoleon NBM030S2A Installation And Operating Instructions Manual

30

11.2 CONDENSATE DRAINS

The furnace may condense as much as a 4½ pounds of water per hour (approximately 2 imperial quarts, 2½ U.S.
IOM
IOM
quarts or 2¼ liters). It is necessary to make provisions for draining the condensate away. The furnace is supplied
with a drain trap assembly. See Figures 16-18 for possible locations of the drain trap.
Affi x the condensate trap assembly to the interior of the side panel in the blower compartment for upfl ow
positions. For horizontal positions affi x the condensate trap assembly to the exterior side panels.
Three plastic drain hose clamps are provided in the parts bag. The large ones are used for securing the drain
hose to the front manifold cover drain outlet, and securing the drain hose to the 5/8" barbed fi tting on the
condensate trap assembly. The small one is used to secure the drain hose to the 1/2" barbed fi tting on the
condensate trap assembly.
The drain coupling on the exhauster will work better if the drain holes are pointed down about 15 degrees. The
drain hose supplied with the furnace is long enough to reach either side panel; however, it must be cut to fi t each
application. This is to prevent kinking in the drain lines.

11.3 PREPARATIONS FOR VENT AND DRAINING OPTION

1. Determine the most suitable vent and drain options for installation. See Figures 16-18 for reference, and
refer to Exhauster Rotation Instructions section if necessary.
2. Remove the 3½" plastic exhaust vent cap (if required), and cover vent hole not in use. Install rubber
grommet (in parts bag) for 2" vent pipe. Connect vent pipe (field supplied). If using 1½" or 3" vent, make
transition as close as possible to the unit and on a vertical section.
3. Connect 2" air intake pipe (field supplied). The exhaust vent must be supported appropriately prior to
it being fitted to the exhauster. Under no circumstances shall the exhauster bear any weight of the
venting system.
4. Remove the plastic air inlet cap and connect the 2" PVC air intake connector with the rubber gasket on the
outside of the unit using the 2" lock nut (in parts bag).
5. Remove the two plastic caps attached to the blower division, and the one attached to the side panel if
applicable.
6. Affix the condensate trap assembly to the interior of the side panel in the blower compartment for upflow
positions using the two screws provided in parts bag (Fig.16). For horizontal positions affix the condensate
trap assembly to the exterior side panels (Fig. 17 & 18).
7. Make sure combustion compartment is fully sealed.
NOTE
• Condensate drain tubing must be cut to
appropriate length and slopping towards
condensate trap, ensuring that drain hoses
do not create traps prior to the condensate
trap assembly.
• Condensate trap must be primed with
water prior to initial furnace start up.
• Any increase of venting diameter must be
done on the vertical sections NOT on the
horizontal sections.
W415-1117 / A / 03.11.14
NOTE: It is recommended that pliers be used to fi rmly clamp the plastic hose clamps.
H16.2.1A
NOTE
Barbed fi ttings must be fully inserted into
condensate trap, seated to barb fl ange.
H16.3.1A
BARB FLANGE