Setting The Unit; Completing The Heat Exchanger Condensate Drain Installation; Completing The Vent Pipe Installation And Assembly - Nordyne R8HE Series Installation Instructions Manual

Setting the Unit

IMPORTANT NOTE:
Before hoisting and setting the unit in place, the short
piece of factory installed drain line located next to
the unit burner section must be removed from the
HX collector box drain valve to allow for passage of
the condensate drain line installed with the roof curb.
The condensate drain valve is located in the bottom
left corner of the heat exchanger collector box. See
Figure 25 (page 49). Remove the drain line and rubber
grommet located in the unit bottom pan, setting the
rubber grommet aside for later use.
• Set unit in place on curb as instructed in the Rigging
and Hoisting section of unit installation instructions.
IMPORTANT NOTE:
R8HE models may be lifted without the control access
panel in place to accommodate the passage and
installation of the condensate drain line.
WARNING:
To avoid accidental injury 6"x6" boards should
be placed across corners of the roof curb while
routing the condensate drain line up through
the bottom of the unit. After enough drain line
is passed through the bottom pan opening to
guide from inside the control / burner area the
boards may be removed for lowering the unit the
remainder of the way onto the curb.
• While lowering unit onto the curb, carefully pass the
first few inches of the 24 inch condensate drain line left
outside the top of the curb up through the hole in the
bottom pan below the collector box drain fitting.
• While holding the end of the drain line continue lowering
the unit until fully seated on curb ensuring the drain line
feeds up through the hole and does not become trapped
or kinked under the unit.
48
C o m p l e t i n g t h e H e a t E x c h a n g e r
Condensate Drain Installation
IMPORTANT NOTE
Downflow applications require the factory set
position of the condensate drain valve be changed
from the horizontal (H) to downflow (D) position. The
condensate drain valve is located in the bottom left
corner of the heat exchanger collector box to the left
of the inducer motor. See
the valve 90 degrees in a clockwise direction until the
arrow is pointing vertically downward.
1. Slide the rubber grommet (large diameter first) down
the 24" of tubing and reinstall back into the unit bottom
pan ensuring a water tight seal. Additional sealing is
permissible.
2. Route the drain line up and onto to the condensate
drain valve barbed fitting. Cut hose to length required
to keep line from bending and secure to barbed fitting
using the spring hose lamp provided in the kit.
Condensate Disposal
• The method for disposing of condensate varies according
to local codes. Consult your local code or authority
having jurisdiction.
• Each of the condensate drain lines must be J-trapped
using field supplied parts. After the condensate lines
are J-trapped, they may be combined together into a
single run to the drain. The drain lines must be routed
downward to ensure proper drainage from furnace.
• Neutralizer kit P/N 902377 is available for use with this
furnace. Please follow the instructions provided with the
kit.
• For Installations where there is limited clearance for
the J-Trap (such as an attic where it may be installed
between ceiling joists), either side of the J-Trap can be
shortened to a minimum of 3 Inches. See
(page 49).
Completing the Vent Pipe Installation and
Assembly
1. Connect the horizontal 13.25" x 2" PVC pipe that came
supplied with the unit to the inducer motor rubber coupler
and secure using the 3" hose clamp provided.
2. Clean the opposite end of vent pipe and cement the 2"
x 22.5 degree elbow onto the 2" pipe at this time. Orient
elbow in a downward position.
Figure 25. Carefully rotate
Figure 25