Horizontal Directaire ™ Venting - Lochinvar 399 Installation And Service Manual

Masonry Chimney Installation
A masonry chimney must be properly sized for the installation
of a high efficiency gas-fired appliance. Venting of a high
efficiency appliance into a cold or oversized masonry chimney
can result in operational and safety problems. Exterior
masonry chimneys, with one or more sides exposed to cold
outdoor temperatures, are more likely to have venting
problems. The temperature of the flue products from a high
efficiency appliance may not be able to sufficiently heat the
masonry structure of the chimney to generate proper draft. This
will result in condensing of flue products, damage to the
masonry flue/tile, insufficient draft and possible spillage of
flue products into an occupied living space. Carefully inspect
all chimney systems before installation.
WARNING: Do not vent this unit into a
masonry chimney without a sealed stainless
steel liner system. Any breaks, leaks, or
damage to the masonry flue/tile will allow the
positive-pressure flue products to leak from
the chimney and into occupied living spaces.
This could cause serious injury or death due
to carbon monoxide poisoning and other
harmful flue products.
IMPORTANT: Check with local code officials
to determine code requirements or the
advisability of using a masonry chimney with
a sealed corrosion-resistant liner system.
Sidewall Vent Termination Clearances and
Location
Follow all sidewall venting termination information for
clearances and location under
, page 12.
Installation and
Service Manual
Sidewall Vent Kits
Input Kit*
Btu/hr (w/Power
Fan Assy.)
399,999 SVK3006
500,000 SVK3006
650,000 SVK3008
750,000 SVK3008
990,000 SVK3009
1,260,000 SVK3010
1,440,000 SVK3010
1,800,000 SVK3012
2,070,000 SVK3012
*These kits include a sidewall venter assembly, vent termination, and barometric damper.
4. Horizontal DirectAire™ Venting
IMPORTANT: Before installing a venting system,
follow all venting clearances and requirements
found in the Venting, General Information
section, page 11.
The Horizontal DirectAire™ vent system is the same as the
Sidewall Venting system, except it pulls combustion air from the
outdoors through a sidewall air inlet. Follow all requirements in
, page 19.
The Horizontal DirectAire™ vent system requires you to
install two vent pipes directly to the unit; one pipe for flue
products and one for combustion air. Install both vent pipes
horizontally with a sidewall termination point. For this venting
option, you must purchase the DV box accessory from the
appliance manufacturer. The DV box attaches to the air inlet of
the unit. The pipe for combustion air attaches to the DV box.
Make vent connection directly to the top of the unit. No
additional draft diverter or barometric damper is required on
single unit installations with a dedicated stack and a negative
draft maintained between 0.04 to 0.08 inches w.c.
The Horizontal DirectAire™ combustion air supply system
has specific vent material and installation requirements. The
air inlet pipe connects directly to the boiler to supply
combustion air. The combustion air inlet pipe is a dedicated
system with one air inlet pipe per boiler. You must connect the
air inlet pipe to a combustion air inlet cap as specified in this
section.
21
TABLE-E
Max. Vent Vent
Length Termination Only
(399,999 - 750,000 Btu/hr)
100 ft. SVK3043
100 ft. SVK3043
100 ft. SVK3044
100 ft. SVK3044
100 ft. N/A
100 ft. N/A
100 ft. N/A
100 ft N/A
100 ft. N/A
Max. Vent
Length
50 ft.
50 ft.
50 ft.
50 ft.
N/A
N/A
N/A
N/A
N/A