13
Pressure switch
box
Terminal
10.0 COMBUSTION AIR PIPE INSTALLATION
1. Use 4” diameter vent pipe ( not included in the DVS-100 kit ) for combustion air.
(The direct vent system requires additional parts. The combustion air pipe must
be approved, Schedule PVC 40, PVC-SWV, SDR-21, SDR-26, Septic Sewer Pipe,
ABS plastic pipe and aluminum pipe). Choice of material is up to the installer’s
discretion.
2. Run from the vent terminal to the burner.
3. A reducer will be required at the burner.
4. Seal all joints with sealant and / or aluminum duct tape.
Figure 11 – Combustion air pipe
11.0 PRESSURE SAFETY SWITCH INSTALLATION
Oil-fired appliances installed with a direct vent system requires a pressure safety switch. A
safety switch is included with the direct vent kit. It is the installer’s responsibility to install the
pressure switch in accordance with the instruction provided.
The pressure switch will automatically shut down the burner if vent is blocked for any reason.
Once the blockage is removed, the burner will automatically restart.
Pressure switch box must be installed in the vertical position on the inside wall near the
terminal
.
