34
NOTE: Do not allow insulation or other materials to accumulate
inside pipe assembly when installing through hole.
5. Secure as sembly to roof structure as shown in “Figure: 27”
using f ield sup plied meta l strapping or equivalent support
material.
NOTE: Ensure termination he ight is above the roof surface or
anticipated snow level as s hown in “Figure: 27”.
6. Install rain c ap and small diameter pipe assembly in
roof penetration assembly, Ensure small diameter
pipe i s cemented and bottomed in Y c oncentric fitting.
7. Cement water heater combustion air inta ke and vent pipes to
concentric vent terminatio n assembly. See “Figure: 27” for
proper pipe attachme nt.
8. Operate heater through 1 heat cycle to ensure combus tion
air and vent pipes are proper ly connected to concentr ic vent
termination connections.

FLAT ROOF INSTALLATION

When installing a concentric termination vertically through a flat
roof, the termination’s vent cap must be a mi nimum of 10 feet (3
m) away from any parapet, vertical wall or s tructure as shown
in Figure 27A.
If this required 10 foot (3 m) distance to a parapet, vertic al wall
or structure cannot be maintained, standard terminations must
be used. See Vertical Termination Installation.
CONCENTRIC TERMINATION(S)
MUST BE A MINIMUM OF 10 FEET
(3 m) AWAY FROM ANY PARAPET,
VERTICAL WALL OR
STRUCTURE.
CONCENTRIC TERMINATIONFLAT ROOF CLEARANCE

Figure: 27A

INSTALLATION SIDE WALL TERMINATION

Figure: 28

1. Determine best location for termination kit.
NOTE: Consideration for the following should be used when
determining an appropriate location for the termination kit:
• Termination kit positioned where the vent vapors will not damage
plants/shrubs or air conditioning equipment.
• Termination kit positioned so it will not be affected by wind eddy
that may allow recirculation of combustion products, or airborne
leaves, or light snow.
• Termination kit positioned where it will not get damaged or be
subjected to foreign objects, such as stones, balls, etc.
• Termination kit positioned where the vent vapors will not be
objectionable.
NOTE: See Venting Installation section (starting on Page 25) in this
manual for additional vent location requirements.
2. Cut 1 hole (5 in. diameter).
3. Partially assemble concentric vent termination kit.
a) Cement the Y concentric fitting to larger diameter
kit pipe, see “Figure: 19”.
b) Cement the rain cap to the smaller diameter kit
pipe, see “Figure: 26”.
NOTE: Instead of cementing the smaller pipe to the rain cap, a
eld-supplied stainless steel screw may be used to secure the 2
components together when eld disassembly is desired for cleaning,
see “Figure: 26”.
When using alternate screw assembly method, drill clearance hole
in rain cap and pilot hole in vent pipe for screw being used. Failure
to drill adequate holes may cause cracking of PVC components,
allowing combustion products to be recirculated. Failure to follow
this warning could result in personal injury or death.
Do not operate the heater with rain cap removed or recirculation
of combustion products may occur. Water may also collect inside
larger combustion-air pipe and flow to the burner enclosure. Failure
to follow this warning could result in product damage or improper
operation, personal injury or death.
4. Install Y concentric fitting and pipe assembly through
structure’s hole.
NOTE: Do not allow insulation or other materials to accumulate
inside pipe assembly when installing through hole.