Air Intake/Vent Connections; Air Inlet Pipe Materials - Lochinvar 150 - 500 Installation & Operation Manual

3
General venting
Combustion air piping to the outside MUST
NOTICE
BE used. Use of combustion air from the
room via louvers, plenums, or any other
device is not authorized.

Air intake/vent connections

1. Combustion Air Intake Connector (FIG.'s 3-5 thru 3-7) -
Used to provide combustion air directly to the unit
from outdoors. A fitting is provided on the unit for final
connection. Combustion air piping must be supported
per guidelines listed in the National Mechanical Code,
Section 305, Table 305.4 or as local codes dictate.
2. Vent Connector (FIG.'s 3-5 thru 3-7) - Used to provide a
passageway for conveying combustion gases to the
outside. A transition fitting is provided on the unit for
final connection. Vent piping must be supported per the
National Building Code, Section 305, Table 305.4 or as
local codes dictate.
Figure 3-5 Near Water Heater Venting Models 150 - 199
VENT
3" CPVC PIPE SUPPLIED WITH
WATER HEATER MUST BE USED
FOR VENT CONNECTION
NOTE: CPVC VENT PIPE AND VENT FITTINGS MUST BE USED
IN CLOSET AND ALCOVE INSTALLATIONS.
Figure 3-6 Near Water Heater Venting Models 285 - 399
VENT
4" CPVC PIPE SUPPLIED WITH
WATER HEATER MUST BE USED
FOR VENT CONNECTION
NOTE: CPVC VENT PIPE AND VENT FITTINGS MUST BE USED
IN CLOSET AND ALCOVE INSTALLATIONS.
16
AIR
Figure 3-7 Near Water Heater Venting Model 500
4" CPVC PIPE SUPPLIED WITH
WATER HEATER MUST BE USED FOR
VENT CONNECTION
NOTE: CPVC VENT PIPE AND VENT FITTINGS MUST BE USED
IN CLOSET AND ALCOVE INSTALLATIONS.

Air inlet pipe materials:

The air inlet pipe(s) must be sealed.
combustion air inlet pipe materials from the following list:
PVC, CPVC or ABS
Dryer Vent or Sealed Flexible Duct (not recommended for
rooftop air inlet)
Galvanized steel vent pipe with joints and seams sealed as
specified in this section.
Type "B" double-wall vent with joints and seams sealed as
specified in this section.
*Plastic pipe may require an adapter (not provided) to
transition between the air inlet connection on the appliance and
the plastic air inlet pipe.
The Armor water heater uses model specific combustion air
intake and vent piping sizes as detailed in Table 3B below.
Table 3B Air Intake/Vent Piping Sizes
AIR
Model
150 - 199
285 - 500
NOTICE
Installation & Operation Manual
VENT
Choose acceptable
Air Intake
3 inches
4 inches
Increasing or decreasing combustion air or
vent piping is not authorized.
AIR
Vent
3 inches
4 inches