8
4. The manufacturer also recommends the vent system
terminations not be installed closer than 3' (91cm) from an inside
corner of an L shaped structure. And not less than 1' (30.5 cm)
above grade or anticipated snow level.
5. The vent termination shall not be mounted directly above or
within 3' (91cm) horizontally from an oil tank vent or gas meter
to avoid potential freeze-up from condensation.
6. The vent shall terminate a minimum of 12" (30.5 cm) above
expected snowfall level to prevent blockage of vent termination.
Plan the vent system layout so that proper clearances are
maintained from plumbing and wiring.
Vent pipes serving power vented appliances are classified by
building codes as "vent connectors". Required clearances from
combustible materials must be provided in accordance with
information in this manual under LOCATION OF HEATER and
CLEARANCES, and with National Fuel Gas Code and local Codes.
IMPORTANT
Plan the layout of the vent system backwards from the vent
termination to the appliance.
WARNING
USE ONLY THE VENT TERMINALS SUPPLIED WITH THIS UNIT.
TERMINATION OF A VENT SYSTEM WITH A DEVICE OTHER
THAN THE SUPPLIED VENT TERMINATIONS WILL AFFECT
SYSTEM PERFORMANCE AND RESULT IN A SAFETY HAZARD.
DIRECT VENTING
The air intake provided on the unit contains a mesh screen (see
Figure 7).
3" (7.6cm) 45° PVC ELBOW WITH MESH SCREEN
FIGURE 7
WARNING
WHEN THE UNIT IS TO BE SETUP AS A DIRECT VENT, THE
MESH SCREEN MUST BE REMOVED. THE INLET VENT PIPE
MAY THEN BE GLUED TO THE AIR INTAKE (see Figure 8)
PROVIDED ON THE UNIT.
FIGURE 8
DIRECT VENT TERMINAL INSTALLATION
IMPORTANT
THIS UNIT CONSISTS OF TWO VENT TERMINALS - AN INTAKE
VENT TERMINAL AND AN EXHAUST VENT TERMINAL. THE
INTAKE VENT TERMINAL IS A 3" 45° PVC ELBOW WITH A
DOME SHAPE SCREEN AND THE EXHAUST VENT TERMINAL
IS A 3" 45°PVC ELBOW WITH A MESH WIRE SCREEN.
NOTE: TO PREVENT EXHAUSTING PRODUCTS FROM
CIRCULATING TO THE AIR INTAKE IN WINDY/COLD AREAS,
THE MAXIMUM PRACTICAL DISTANCE BETWEEN THESE TWO
TERMINALS IS RECOMMENDED.
IMPORTANT
WHEN LOCATING THE TERMINALS ON A SIDEWALL, THE
FOLLOWING SPECIFICATIONS PERTAINING TO TERMINAL
LOCATION MUST BE FOLLOWED.
1. The intake vent terminal and the exhaust vent terminal must
terminate on the same exterior wall and must be located at a
minimum of 24" (61cm) from the vertical centerline of the
exhaust vent terminal (see Figure 9). In colder climates
increasing the 24" (61cm) minimum to 48" (122cm) will reduce
possibility of frost over from side winds blowing exhaust vapors
to the air intake of the direct the vent and is recommended for
Canada.
2. The horizontal centerline of the intake vent terminal may not be
located lower than the horizontal centerline of the exhaust vent
terminal (see Figure 9).
FIGURE 9
INSTALLATION SEQUENCE
For installations in the City of Los Angeles, California Category IV
PVC Pipe such as that manufactured by Brownline Pipe Company,
must be used as vent pipe material.
CAUTION
Vent terminals supplied with the heater must be used.
NOTE: BEFORE BEGINNING INSTALLATION OF ANY VENT
PIPE READ THE VENT PIPE MANUFACTURER'S INSTALLATION
INSTRUCTIONS.
1. After the points of termination have been determined, use the
cover plates as templates to mark the holes for the vent pipes
to be inserted through the wall. BEWARE OF CONCEALED
WIRING AND PIPING INSIDE OF WALL.
2. If the vent terminals are being installed on the outside of a
finished wall, it may be easier to mark both the inside and outside
