Lochinvar Shield SWR125 Installation & Service Manual page 31

3
Sidewall direct venting
Sidewall termination – optional concentric vent
Figure 3-9 Concentric Vent Dimensional Drawing -
Models 125 -- 200 / 100140480
Instead of cementing the smaller pipe
NOTICE
to the rain cap, a field-supplied stainless
steel screw may be used to secure the
two (2) components together when
field disassembly is desired for cleaning
(see FIG. 3-11).
When using the alternate screw assembly
⚠ WARNING
method, drill a clearance hole in the rain
cap and a pilot hole in the vent pipe for
the screw size 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.
⚠ WARNING
Do not operate the appliance with
the rain cap removed or recirculation
of combustion products may occur.
Water may also collect inside the 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.
Figure 3-11 Rain Cap to Vent Pipe Alternate Assembly
(continued)
Figure 3-10 Concentric Vent Dimensional Drawing -
Models 285 -- 500 / 100140484
"B" DIA.
"C" DIA.
"G"
"B" DIA. PVC
VENT / EXHAUST
A B C
60" 4" 6"
(1524 MM) (102 MM) (152 MM) (537 MM)
6. Install the Y concentric fitting and pipe assembly through
the structure's hole.
Do not allow insulation or other materials to
NOTICE
accumulate inside the pipe assembly when
installing through the hole.
7. Install the rain cap and small diameter pipe assembly into
the Y concentric fitting and large pipe assembly. Ensure
small diameter pipe is bottomed and cemented in the Y
concentric fitting for #100140480 installations and fastened
tightly into the rubber adapter for #100140484 installations.
8. Secure the assembly to the structure as shown in FIG. 3-12
using field-supplied metal strapping or equivalent support
material.
Ensure termination location clearance
NOTICE
dimensions are as shown in FIG. 3-6.
If assembly needs to be extended to allow
NOTICE
sidewall thickness requirement, the two (2)
pipes supplied in the kit may be replaced by
using the same diameter, field-supplied SDR-
26 PVC (D2241) pipe for 100140480 and
standard schedule 40 PVC for 100140484.
Do not extend dimension D* more than 60
inches (see FIG.'s 3-9 and 3-10).
If assembly depth needs to be reduced,
NOTICE
dimension D can be as short as possible.
Installation & Service Manual
"A"
"D"
3"
(76 MM)
"H" DIA.
D E F G
21 1/8" 10" 7 5/8" 3"
(76 MM)
(254 MM) (194 MM)
"E"
"F"
H
6 5/8"
(168 MM)
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