Direct Vent Requirements; Section 2. Installation (Continued) - Pentair ETi 400 NA ASME Guía De Instalación Y De Usuario

DIRECT VENT REQUIREMENTS

Install vent pipe so that it can expand and contract freely as the temperature changes. Support the vent pipe
1.
according to applicable codes and vent manufacturer's instructions. Pipe support must allow the vent pipe
free movement out and back, from side to side, or up and down as necessary, without putting a strain on the
heater or vent body. It is recommended to slope the horizontal pipe runs up from the heater at least 1/4" per
foot (2 cm/M). Install Approved condensate drains at low points where condensate might collect. Plumb
condensate drains to a drain through hard piping or high-temperature tubing such as silicone rubber or
EPDM rubber – do not use vinyl or other low temperature tubing. Follow drain manufacturer's installation
instructions.
2. Use an Approved firestop for floor and ceiling penetrations. Use an Approved thimble for wall penetrations.
Use an Approved roof flashing, roof jack, or roof thimble for all roof penetrations. Do not fill the space
around the vent (that is, the clear air space in the thimble or firestop) with insulation. The
be located so that the vent is vertical.
3. Vent Termination: Vertical (See Figure 25 below and Figure 27 on page 35), for height of vent termination
above the roof. Use an Approved vent terminal specified by local and national codes and your manufacturer's
instructions. A roof termination must be vertical. In Canada, the Vent Cap location shall have a minimum
clearance of 4 feet (1.2M) horizontally from electric meters, gas meters, regulators, and relief openings.
4. Make sure entire installation is sealed according to approved standards.
Risk of carbon monoxide poisoning if adapter is improperly attached. Mechanical connections (such as screws) can cause
cracking and leaks in the adapter. Do NOT drill holes or use screws to connect the appliance adapter to the heater vent body.
Attach with manufacturer's specified adhesive.
Vent
Termination
1' Minimum
above snow or
Forced Air
finished grade
Inlet
(whichever is
higher)
Figure 25.
Rev. C 4/2017
WARNING
4' Min.
4' Min.
4' Min.
Gas Meter
3' Minimum clearance if
horizontal distance to
exhaust opening is less
than 10 feet.
ETi 400 High Efficiency Pool and Spa Heater Installation and User's Guide
Section 2: Installation Instructions
4' Min.
Vent
Termination
1' Min.
33
roof opening must
Max. 12"
Min. 3"
Vent
Termination
At least 7'
above grade
adjacent
to public
walkways