Re-Verber-Ray LD Series Installation Manual page 29

LD Series
Non-contaminated outside air for combustion must be ducted to the heater if any of the following apply:
• Chemicals such as chlorinated or fluorinated hydrocarbons (typical sources are refrigerants, solvents,
adhesives, degreasers, paints, paint removers, lubricants, pesticides, etc.).
• High humidity.
• Contaminants such as sawdust, welding smoke, etc.
• Negative building pressure.
• Unusually tight construction where there is an air infiltration rate of less the 0.40 air changes per hour.
Combustion air intake may be located on either the sidewall or roof (see Figures 3.26 - 3.28).
Figure 3.26
Vertical Outside Air Supply for
Single Heater Intake •
Figure 3.27
Horizontal Outside Air Supply
for Single Heater Intake
Figure 3.28
Vertical Outside Air Supply
for Common Intake • Side View
NOTE: Common
intake heaters must
share the same
thermostat.
Side View
4" Pipe
• Side View
Air Intake Cap
(P/N: WIV-4)
18 in.
Minimum
Flexible Air
Inlet Boot
4" Intake Pipe
3.0 Installation
Roof Intake Cap
18 in.
Minimum
Flexible Air Inlet Boot
Flexible Air Inlet Boot
4" Pipe
Wall
Roof Intake Cap
6" Pipe
Flexible Air
Inlet Boot
4" Intake Pipe
29
• Combustion Air Requirements
Roof
Burner
Control Box
Burner
Control Box
Roof
Burner
Control Box