Lochinvar 150 - 500 Installation & Operation Manual page 22

4
Sidewall direct venting
Sidewall termination – optional concentric vent
Figure 4-9 Concentric Vent Dimensional Drawing -
Models 150 - 199
Instead of cementing the smaller pipe to the
NOTICE
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. 4-11).
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
components, allowing combustion products
to be recirculated. Failure to follow this
warning could result in personal injury or
death.
Do not operate the appliance with the rain
WARNING
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.
follow this warning could result in product
damage or improper operation, personal
injury, or death.
Figure 4-11 Rain Cap to Vent Pipe Alternate Assembly
22
may cause cracking
Failure to
Figure 4-10 Concentric Vent Dimensional Drawing -
Models 285 - 500
"C" DIA.
"B" DIA. PVC
VENT / EXHAUST
6. Install the Y concentric fitting and pipe assembly through
the structure's hole.
NOTICE
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 #CVK3003 installations and fastened
of PVC
tightly into the rubber adapter for #CVK3007 installations.
8. Secure the assembly to the structure as shown in FIG. 4-12
using field-supplied metal strapping or equivalent support
material.
NOTICE
NOTICE
NOTICE
Installation & Operation Manual
"A"
"B" DIA.
"D"
3"
(76 MM)
"G"
"H" DIA.
Do not allow insulation or other materials to
accumulate inside the pipe assembly when
installing through the hole.
Ensure termination location clearance
dimensions are as shown in FIG. 4-6.
If assembly needs to be extended to allow
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 CVK3003
and standard schedule 40 PVC for CVK3007.
Do not extend dimension D* more than 60
inches (see FIG.'s 4-9 and 4-10).
If assembly depth needs to be reduced,
dimension D can be as short as possible.
"E"
"F"