User Guide

30
with 4” venting
VENT LENGTH GREATER THAN
50 EQUIVALENT FT. USE THIS
SCREEN (SUPPLIED).
with 3” venting (short) with 3” venting (long)
VENT LENGTH LESS THAN OR
EQUAL TO 20 EQUIVALENT FT.
USE THIS SCREEN (SUPPLIED).
VENT LENGTH GREATER THAN
20 EQUIVALENT FT.
USE THIS SCREEN (SUPPLIED).
Figure 29
#6 SHEET
METAL
SCREW
ELBOW
#6 SHEET
METAL
SCREW
(FIELD
SUPPLIED)
PLASTIC
SCREEN
SHOULDER
OPEN
POCKET
CLOSED
POCKET
POCKETS
FACING OUT
Figure 30
Vent Pipe Material
This heater is certifi ed to be installed using Schedule
40 PVC or CPVC or polypropylene or ABS plastic vent
material for the exhaust. The combustion air intake material
may be PVC, ABS, CPVC or polypropylene. Check local
codes to determine which materials are allowed in your
area and only use approved material. All venting material
and components must be joined with the approved primer/
cleaner and solvent cement or mechanical seals. Do not
cement the venting system to the heater.
Note: Use only solid (not foam core) piping. Plastic pipe
and fi ttings are available through most plumbing suppliers.
Always check the marking on the pipe to make sure you
are using the correct material.
VENT PIPE PREPARATION
1. INITIAL PREPARATION
• Make sure the solvent cement you are planning to
use is designed for the specifi c application you are
attempting.
• Know the physical and chemical characteristics and
limitations of the PVC and CPVC piping materials
that you are about to use.
• Know the reputation of your manufacturer and their
products.
• Know your own qualifications or those of your
contractor. The solvent welding technique of joining
PVC and CPVC pipe is a specialized skill just as any
other pipe fi tting technique.
• Closely supervise the installation and inspect the
fi nished job before start-up.
• Contact the manufacturer, supplier, or competent
consulting agency if you have any questions about
the application or installation of PVC and CPVC
pipe.
• Take the time and effort to do a professional job.
Shortcuts will only cause you problems and delays
in start-up. By far, the majority of failures in PVC
and CPVC systems are the result of shortcuts and/
or improper joining techniques.
2. SELECTION OF MATERIALS (PVC and CPVC
VENTING)
• Cutting Device - Saw or Pipe Cutter
• Deburring Tool, Knife, File, or Beveling Machine (2”
and above)
• Brush - Pure Bristle
• Rag - Cotton (Not Synthetic)
• Primer and Cleaner
• Solvent Cement - PVC for PVC Components and
CPVC for CPVC Components only
• Containers - Metal or Glass to hold Primer and
Cement. Select the type of PVC or CPVC materials
to be used on the basis of their application with
respect to chemical resistance, pressure rating,
temperature characteristics, etc.
• Insertion Tool - Helpful for larger diameter pipe and
fi ttings 6” and above.